WO2010120756A1 - Active phased array architecture - Google Patents
Active phased array architecture Download PDFInfo
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- WO2010120756A1 WO2010120756A1 PCT/US2010/030864 US2010030864W WO2010120756A1 WO 2010120756 A1 WO2010120756 A1 WO 2010120756A1 US 2010030864 W US2010030864 W US 2010030864W WO 2010120756 A1 WO2010120756 A1 WO 2010120756A1
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- hybrid
- phased array
- array antenna
- active
- signal
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
- H01Q15/242—Polarisation converters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/36—Networks for connecting several sources or loads, working on the same frequency band, to a common load or source
Definitions
- a phased array antenna uses multiple radiating elements to transmit, receive, or transmit and receive radio frequency (RF) signals.
- Phase shifters are used in a phased array antenna in order to steer the beam of the signals by controlling the respective phases of the RF signals communicated through the phase shifters.
- Phased array antennas are used in various capacities, including communications on the move (COTM) antennas, satellite communication (SATCOM) airborne terminals, SATCOM mobile communications, and SATCOM earth terminals.
- COTM move
- SATCOM satellite communication
- SATCOM mobile communications typically requires the use of automatic tracking antennas that are able to steer the beam in azimuth, elevation, and polarization to follow the satellite's position while the terminal is in motion.
- a phased array antenna is typically desired to be "low-profile", small and lightweight, thereby fulfilling the stringent aerodynamic and mass constraints encountered in the typical mounting.
- phased array antenna is an electronically steerable phased array antenna.
- the electronically steerable phased array antenna has full electronic steering capability and is more compact and lower profile than a comparable mechanically steered antenna.
- the main drawback of fully electronic steering is that the antenna usually requires the integration of numerous expensive analog RF electronic components which may prohibitively raise the cost for commercial applications.
- a phased array antenna comprises a radiating element that communicates dual linear signals to a hybrid coupler with either a 90° or a 180° phase shift and then through low noise amplifiers (LNA). Furthermore, the dual linear signals are adjusted by phase shifters before passing through a power combiner.
- LNA low noise amplifier
- a typical digital phase shifter uses a switched delay line that is physically large and operates over a narrow band of frequencies due to its distributed nature.
- Another typical digital phase shifter implements a switched high-pass low-pass filter architecture, which has better operating bandwidth compared to a switched delay line but is still physically large.
- the phase shifter is often made on gallium arsenide (GaAs). Though other materials may be used, GaAs is a higher quality material designed and controlled to provide good performance of electronic devices. However, in addition to being a higher quality material than other possible materials, GaAs is also more expensive and more difficult to manufacture. The typical phased array components take up a lot of area on the GaAs, resulting in higher costs.
- a standard phase shifter has high RF power loss, which is typically about n+1 dB of loss, where n is the number of phase bits in the phase shifter.
- Another prior art embodiment uses RF MEMS switches and has lower power loss but still consumes similar space and is generally incompatible with monolithic solutions.
- the typical components in a phased array antenna are distributed components that arc frequency sensitive and designed for specific frequency bands.
- Quadrature hybrids or other differential phase generating hybrids are used in a variety of RF applications, including phased array antennas.
- quadrature hybrids are used for generating circular polarization signals, power combining, or power splitting.
- the outputs of a quadrature hybrid have equal amplitude and a 90° phase difference.
- the quadrature hybrid is often implemented as a distributed structure, such as a Lange coupler, a branchline coupler, or a ring hybrid.
- Other RF hybrids, such as a magic tee or a ring hybrid result in 180° phase shift.
- an RF hybrid uses distributed components, limited in frequency band and requires significant physical space inversely proportional to an operating frequency.
- the quadrature hybrid is typically made of GaAs and has associated RF power loss on the order of 3-4 dB per hybrid when used as a power splitter.
- An in-phase hybrid may be configured as a power combiner or power splitter in a variety of RF applications, including phased array antennas.
- the outputs of an in-phase hybrid have equal amplitude and a substantially zero differential phase difference.
- the inputs of an in-phase hybrid configured as a power combiner encounter substantially zero differential phase and amplitude summation of the two input signals.
- the in-phase hybrid is implemented as a distributed structure such as a Wilkinson hybrid.
- an in-phase hybrid is limited in frequency band and requires significant physical space that is inversely proportional to the operating frequency.
- the in-phase hybrid is typically made on GaAs.
- the in-phase hybrid generally has associated RF power loss on the order of 3-4 dB per hybrid when used as a power splitter and an associated RF power loss of about 1 dB when used as a power combiner.
- phased array antenna architecture that is not frequency limited or polarization specific. Furthermore, the antenna architecture should be able to be manufactured on a variety of materials and with little or no associated RF power loss. Also, a need exists for a phased array antenna that uses less space than a similar capability prior art architecture, and is suitable for a monolithic implementation.
- a phased array solid-state architecture has dual- polarized feeds and is manufactured, for example, on highly flexible silicon germanium (SiGe).
- the implementation of dual -polarized feeds facilitates the operation of phased arrays where the polarization can be statically or dynamically controlled on a subarray or element basis.
- the sub-component control is configured to optimize a performance characteristic associated with polarization, such as phase or amplitude adjustment.
- An active phased array architecture may replace traditional distributed and GaAs implementations for the necessary functions required to operate electronically steerable phased array antennas.
- the architecture combines active versions of vector generators, power splitters, power combiners, and RF hybrids in a novel fashion to realize a fully or substantially monolithic solution for a wide range of antenna applications that can be realized with radiating elements having single-polarized or dual-polarized feeds.
- a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a 90° hybrid configured to receive dual linearly polarized RF signals from the radiating element, a first vector generator, and a second vector generator.
- the 90° hybrid is configured to inject a 90° phase shift and generate a RHCP intermediate signal and a LHCP intermediate signal.
- the first vector generator is configured to receive the RHCP intermediate signal, phase adjust the RCHP intermediate signal for beam steering, and output a first RF signal.
- the second vector generator configured to receive the LHCP intermediate signal, phase adjust the LCHP intermediate signal for beam steering, and output a second RF signal.
- a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a first vector generator, a second vector generator, and a hybrid.
- the first vector generator is configured to receive a first signal from the radiating element, provide phase and amplitude adjustment of the first signal for polarization tracking and beam steering, and output a first intermediate signal.
- the second vector generator is configured to receive a second signal from the radiating element, provide phase and amplitude adjustment of the second signal for polarization tracking and beam steering, and output a second intermediate signal.
- the hybrid is configured to receive the first intermediate signal and the second intermediate signal and generate two RF output signals with a phase difference. Furthermore, the two RF output signals are each a composite of the first intermediate signal and the second intermediate signal.
- a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a first vector generator, a second vector generator, and a combiner.
- the first vector generator is configured to receive a first signal from the radiating element, provide phase and amplitude adjustment of the first signal for polarization tracking and beam steering, and to output a first intermediate signal.
- the second vector generator is configured to receive a second signal from the radiating element, provide phase and amplitude adjustment of the second signal for polarization tracking and beam steering, and to output a second intermediate signal.
- the combiner is configured to receive the first intermediate signal and the second intermediate signal, and combine the two signals into an RF output signal.
- a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a hybrid, a first vector generator, a second vector generator, and a combiner.
- the hybrid is configured to receive dual linearly polarized RF signals from the radiating element, inject a phase shift, and generate a RHCP intermediate signal and a LHCP intermediate signal.
- the first vector generator is configured to receive the RHCP intermediate signal, phase adjust the RCHP intermediate signal for beam steering, and output a first RF intermediate signal.
- the second vector generator is configured to receive the LHCP intermediate signal, phase adjust the LCHP intermediate signal for beam steering, and output a second RF intermediate signal.
- the combiner is configured to receive the first RF intermediate signal and the second RF intermediate signal, and combine the two signals into an RF output signal.
- a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a hybrid, a first vector generator, a second vector generator, and an output hybrid.
- the hybrid is configured to receive dual linearly polarized RF signals from the radiating element, inject a phase shift, and generate a RHCP intermediate signal and a LHCP intermediate signal.
- the first vector generator is configured to receive the RHCP intermediate signal, phase adjust the RCHP intermediate signal for beam steering, and output a first RF intermediate signal.
- the second vector generator is configured to receive the LHCP intermediate signal, phase adjust the LCHP intermediate signal for beam steering, and output a second RF intermediate signal.
- the output hybrid is configured to receive the first RF intermediate signal and the second RF intermediate signal and generate two RF output signals with a phase difference.
- the two RF output signals are a composite of the first and second RF intermediate signals.
- FIG. 1 illustrates an exemplary embodiment of an active power splitter
- FIG. 2 illustrates an exemplary embodiment of an active power combiner
- FIG. 3 illustrates an exemplary embodiment of an active RF hybrid
- FIG. 4 illustrates an exemplary embodiment of an active vector generator
- FIG. 5 illustrates an exemplary embodiment of an active antenna signal polarizer
- FIG. 6 illustrates an exemplary embodiment of a phased array antenna comprising an active combiner and configured for phase adjustment;
- FIG. 7 illustrates an exemplary embodiment of a phased array antenna comprising a passive power combiner and configured for phase adjustment
- FIG. 8 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid configured for 90° operation and an active combiner, the phased array antenna being configured for phase adjustment;
- FIG. 9 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid configured for 180° operation and an active combiner, the phased array antenna being configured for phase adjustment;
- FIG. 10 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid configured for 90° operation and a passive power combiner, the phased array antenna being configured for phase adjustment
- FIG. 11 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid configured for 180° operation and a passive power combiner, the phased array antenna being configured for phase adjustment;
- FIG. 12 illustrates an exemplary embodiment of a phased array antenna comprising a passive 90° hybrid and an active combiner and configured for phase adjustment;
- FIG. 13 illustrates an exemplary embodiment of a phased array antenna comprising a passive 180° hybrid and an active combiner and configured for phase adjustment;
- FIG. 14 illustrates an exemplary embodiment of a phased array antenna comprising a passive 90° hybrid and a passive power combiner and configured for phase adjustment
- FIG. 15 illustrates an exemplary embodiment of a phased array antenna comprising a passive 180° hybrid and a passive power combiner and configured for phase adjustment
- FIG. 16 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid and configured for phase adjustment
- FIG. 17 illustrates an exemplary embodiment of a phased array antenna comprising a passive hybrid and configured for phase adjustment
- FIG. 18 illustrates an exemplary embodiment of a phased array antenna comprising two active RF hybrids and configured for phase adjustment
- FIG. 19 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid and a passive hybrid and configured for phase adjustment
- FIG. 20 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid and a passive hybrid and configured for phase adjustment
- FIG. 21 illustrates an exemplary embodiment of a phased array antenna comprising two passive hybrids and configured for phase adjustment
- FIG. 22 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid and configured for phase adjustment
- FIG. 23 illustrates an exemplary embodiment of a phased array antenna comprising a passive hybrid and configured for phase adjustment
- FIG. 24 illustrates an exemplary embodiment of a multi-beam architecture.
- a phased array antenna generally comprises multiple radiating elements, with each radiating element having a polarization component.
- the radiating element has spatially orthogonal linear polarizations, spatially and electrically orthogonal circular polarizations, or spatially orthogonal and electrically non-orthogonal elliptical polarizations.
- each radiating element may have one or more signals fed to the ports.
- each radiating element has two feed ports and results in an unbalanced feed system.
- each radiating element has three feed ports and results in a partially balanced feed system.
- each radiating element has four feed ports and results in a fully balanced feed system.
- a phased array antenna with two feed ports is configured to generate and control different polarizations.
- Exemplary polarization states include a single circular polarization state, a single elliptical polarization state, a single linear polarization state, and two orthogonal polarization states.
- the radiating elements may be in communication with an RF integrated circuit
- RFIC RFIC
- the RFIC is configured to divide, alter, and re-mix the component RF signal to produce or detect various polarization states.
- the RF signal corresponding to the detected polarization state in the RFIC may additionally be combined in a beam-forming network of the array.
- the RFIC can receive input signals from a beam-forming network of the array and produce any desired polarization state.
- a phased array antenna comprises various components.
- the various components may include a vector generator, an active power splitter, an active power combiner, an active RF hybrid, or the like.
- an active power splitter 100 comprises a differential input subcircuit 1 10, a first differential output subcircuit 120, and a second differential output subcircuit 130.
- the differential input subcircuit 110 has paired transistors 111, 112 with a common emitter node and is constant current biased, as is typical in a differential amplifier.
- An input signal is communicated to the base of paired transistors 111, 112 in the differential input subcircuit 110.
- Both the first and second differential output subcircuits 120, 130 comprise a pair of transistors with a common base node and each common base is connected to ground.
- the first differential output subcircuit 120 has a first transistor 121 emitter connected to the collector of one of the input subcircuit transistors 112.
- the emitter of the second output subcircuit transistor 122 is connected to the collector of the other input subcircuit transistor 111.
- the first output is drawn from the collectors of transistors 121, 122 of the first differential output subcircuit 120.
- the second differential output subcircuit 130 is similarly connected, except the transistor 131, 132 emitters are inversely connected to the input subcircuit transistor 111, 112 collectors with respect to transistors 121 , 122.
- the first output and the second output are approximately 180° out of phase with each other.
- transistor 131, 132 emitters are non-inversely connected to input subcircuit transistor 11 1, 1 12 collectors, causing the first output and the second output to be approximately in phase with each other.
- the absolute phase shift of the output signals through the power splitter is not as important as the relative phasing between the first and second output signals.
- active power splitter 100 converts an input RF signal into two output signals. The output signal levels may be equal in amplitude, though this is not required.
- each output signal would be about 3 dB lower in power than the input signal.
- an exemplary active splitter such as active power splitter 100, can provide gain and the relative power level between the input signal and the output signal is adjustable and can be selectively designed.
- the output signal is configured to achieve a substantially neutral or positive power gain over the input signal.
- the output signal may achieve a 3 dB signal power gain over the input signal.
- the output signal may achieve a power gain in the 0 dB to 5 dB range.
- the output signal may be configured to achieve any suitable power gain.
- active power splitter 100 produces output signals with a differential phase between the two signals that is zero or substantially zero.
- the absolute phase shift of output signals through the active power splitter may not be as important as the differential phasing between the output signals.
- active power splitter 100 additionally provides matched impedances at the input and output ports.
- the matched impedances may be 50 ohms, 75 ohms, or other suitable impedances.
- active splitter 100 provides isolation between the output ports of the active power splitter.
- active power splitter 100 is manufactured as a MMIC with a compact size that is independent of the operating frequency due to a lack of distributed components.
- Active Combiner In an exemplary embodiment and with reference to Figure 2, an active power combiner 200 comprises a first differential input subcircuit 210, a second differential input subcircuit 220, a single ended output subcircuit 230, and a differential output subcircuit 240.
- Each differential input subcircuit 210, 220 includes two pairs of transistors, with each transistor of each differential input subcircuit 210, 220 having a common emitter node with constant current biasing, as is typical in a differential amplifier.
- a first input signal is communicated to the bases of the transistors in first differential input subcircuit 210.
- a first line of input signal InI is provided to one transistor of each transistor pair in first differential input subcircuit 210
- a second line of input signal InI is provided to the other transistor of each transistor pair.
- a second input signal is communicated to the bases of the transistors in second differential input subcircuit 220.
- a first line of input signal In2 is provided to one transistor of each transistor pair in first differential input subcircuit 220, and a second line of input signal In2 is provided to the other transistor of each transistor pair.
- a differential output signal is formed by a combination of signals from collectors of transistors in first and second differential input subcircuits 210, 220.
- active power combiner 200 converts two input RF signals into a single output signal.
- the output signal can either be a single ended output at single ended output subcircuit 230, or a differential output at differential output subcircuit 240.
- active power combiner 200 performs a function that is the inverse of active power splitter 100.
- the input signal levels can be of arbitrary amplitude and phase. Similar to an active power splitter, active power combiner 200 can provide gain and the relative power level between the inputs and output is also adjustable and can be selectively designed.
- the output signal achieves a substantially neutral or positive signal power gain over the input signal. For example, the output signal may achieve a 3 dB power gain over the sum of the input signals.
- the output signal may achieve a power gain in the 0 dB to 5 dB range. Moreover, the output signal may achieve any suitable power gain.
- active power combiner 200 additionally provides matched impedances at the input and output ports. The matched impedances may be 50 ohms, 75 ohms, or other suitable impedances. Furthermore, in an exemplary embodiment, active power combiner 200 provides isolation between the input ports of the power combiner. In yet another exemplary embodiment, the active power combiner 200 implements identical building block components as used in an exemplary active phased array architecture.
- the active power combiner 200 is manufactured as a MMIC with a compact size that is independent of the operating frequency due to a lack of distributed components.
- the active power combiner described in various exemplary embodiments may be similar to the active power combiner described with reference to Figures 6, 8-9, and 12-13.
- an active RF hybrid 300 comprises a first active power splitter 310, a second active power splitter 31 1, a first vector generator 320, a second vector generator 321 , a first active power combiner 330, a second active power combiner 331, a first digital-to-analog converter (DAC) 340 and a second DAC 341.
- first active power splitter 310 receives an input at Port 1 and communicates the input to first vector generator 320 and second active power combiner 331.
- second active power splitter 311 receives an input at Port 2 and communicates the input to second vector generator 321 and first active power combiner 330.
- Vector generators 320, 321 are controlled in part by respective DACs 340, 341.
- a 4-bit DAC is used but any number of bits many be used.
- first active power combiner 330 receives input from first vector generator 320 and second active power splitter 31 1, and outputs a signal to Port 3.
- second active power combiner 331 receives input from second vector generator 321 and first active power splitter 310, and outputs a signal to Port 4.
- Active RF hybrid 300 may be used to replace various distributed components, such as a branchline coupler, Lange coupler, directional coupler, or 180° hybrid.
- an active RF hybrid provides similar functionality in comparison to a traditional distributed hybrid.
- active RF hybrid 300 may be dynamically configured to have variable phase differences between the output ports, which could be 90°, 180°, or some other phase difference.
- active RF hybrid 300 provides port-to-port isolation and matched impedances at the input/output ports. Additional information regarding active RF hybrids is disclosed in the U.S. Patent Application entitled “ACTIVE RF HYBRIDS", Applicant docket number 36956.7200, filed the same day as this application is hereby incorporated by reference.
- the active RF hybrid 300 has various advantages over a traditional passive distributed hybrid.
- the active RF hybrid 300 does not result in a loss of power, hut instead has a gain or is at least gain neutral.
- the active RF hybrid 300 does not rely on distributed elements and is capable of operating over very wide bandwidths.
- the active RF hybrid 300 implements identical building block components as used in an exemplary active phased array architecture.
- the active RF hybrid 300 is manufactured as a MMIC with a compact size that is independent of the operating frequency due to a lack of distributed components.
- a vector generator converts an
- a vector generator is a magnitude and phase control circuit.
- the vector generator accomplishes this function by feeding the RF input signal into a quadrature network resulting in two output signals that differ in phase by about 90°.
- the two output signals are fed into parallel quadrant select circuits, and then through parallel variable gain amplifiers (VGAs).
- the quadrant select circuits receive commands and may be configured to either pass the output signals with no additional relative phase shift between them or invert either or both of the output signals by an additional 180°. In this fashion, all four possible quadrants of the 360° continuum are available to both orthogonal signals.
- the resulting composite output signals from the current summer are modulated in at least one of amplitude and phase.
- a vector generator 400 comprises a passive I/Q generator 410, a first variable gain amplifier (VGA) 420 and a second VGA 421, a first quadrant select 430 and a second quadrant select 431 each configured for phase inversion switching, and a current summer 440.
- the first quadrant select 430 is in communication with I/Q generator 410 and first VGA 420.
- the second quadrant select 431 is in communication with I/Q generator 410 and second VGA 421.
- vector generator 400 comprises a digital controller 450 that controls a first digital-to-analog converter (DAC) 460 and a second DAC 461.
- the first and second DACs 460, 461 control first and second VGAs 421, 420, respectively.
- digital controller 450 controls first and second quadrant selects 430, 431.
- vector generator 400 controls the phase and amplitude of an RF signal by splitting the RF signal into two separate vectors, the in-phase (I) vector and the quadrature-phase (Q) vector.
- the RF signal is communicated differentially.
- the differential R_F signal communication may be throughout vector generator 400 or limited to various portions of vector generator 400.
- the RF signals are communicated non-differentially.
- the I vector and Q vector are processed in parallel, each passing through the phase inverting switching performed by first and second quadrant selects 430, 431.
- the resultant outputs of the phase inverting switches comprise four possible signals: a non-inverted I, an inverted I, a non-inverted Q, and an inverted Q.
- all four quadrants of a phasor diagram are available for further processing by VGAs 420, 421.
- two of the four possible signals non-inverted I, inverted I, non-inverted Q, and inverted Q are processed respectively through VGAs 420, 421, until the two selected signals are combined in current summer 440 to form a composite RF signal.
- the current summer 440 outputs the composite RF signal with phase and amplitude adjustments.
- the composite RF signal is in differential signal form.
- the composite RF signals are in single-ended form.
- control for the quadrant shifting and VGA functions is provided by a pair of DACs.
- reconfiguration of digital controller 450 allows the number of phase bits to be digitally controlled after vector generator 400 is fabricated if adequate DAC resolution and automatic gain control (AGC) dynamic range exists.
- AGC automatic gain control
- any desired vector phase and amplitude can be produced with selectable fine quantization steps using digital control.
- reconfiguration of DACs 460, 461 can be made after vector generator 400 is fabricated in order to facilitate adjustment of the vector amplitudes.
- a phased array antenna comprises active components manufactured on silicon germanium (SiGe) in a monolithic solution.
- Other materials may be used, such as GaAs, silicon, or other suitable materials now known or hereinafter devised.
- a monolithic SiGe embodiment using active components results in certain advantages over the distributed/passive network in the prior art, including lower cost, smaller physical size that is independent of operating frequency, wider operating bandwidths, and the ability to provide power gain rather than a power loss.
- the antenna system is not band limited. In other words, the antenna system is applicable to all frequency bands, including X, K, Ku, Ka, and Q bands. In an exemplary embodiment, the antenna system operates over specific frequency ranges, such as 2-20 GHz, 20-40 GHz, or 30-45 GHz. In an exemplary embodiment, multi-band antennas are a practical option as a product. Reconfigurability of the antenna system is also an advantage. In an exemplary embodiment, the antenna system includes the ability to reconfigure the number of phase bits in a DAC over full product life.
- the antenna system is able to reconfigure the amplitude taper of the system over full product life. In yet another exemplary embodiment, the antenna system is able to reconfigure the system polarization over full product life. In an exemplary embodiment with adequate DAC resolution and AGC dynamic range, any arbitrary vector phase and amplitude can be produced with arbitrarily fine quantization steps using digital control.
- vector generator described in various exemplary embodiments may be similar to the vector generator described with reference to Figures 5-24.
- an active antenna polarizer comprises a monolithic, digitally controlled active implementation for processing an RF signal. Two output RF signals communicate with a single radiating element and are digitally controlled to provide any desired polarization phase or amplitude to the radiating element.
- the active antenna polarizer comprises active components and results in no power loss in the communicated signals.
- the active antenna polarizer is configured to operate over multiple frequency bands.
- a transmit active antenna polarizer 500 comprises an active power splitter 510, two vector generators 520, 521 , and two DACs 530, 531.
- An input signal is actively split and transmitted through two vector generators 520, 521 in parallel.
- the vector generators 520, 521 are controlled by DACs 530, 531 , and each vector generator produces a linear output signal. These two linear outputs are then used to energize the two spatially orthogonal feed ports of a radiating element (not shown).
- the feeds to the radiating element can be differential in nature resulting in four feeds to the radiating element.
- one of the feeds to the radiating elements can be differential while the other remains single-ended in nature resulting in three feeds to the radiating element.
- the transmit active antenna polarizer 500 may be considered a basic transmit embodiment which is configured to be implemented in a variety of different phased array antenna architectures.
- the basic transmit embodiment is used in any frequency band and with different polarizations.
- the basic transmit embodiment may be used as the basis for phased array antenna transmitting in linear polarization, circular polarization, or elliptical polarization.
- vector generators 520, 521 control the phase of the antenna signal.
- reconfiguration of DACs 530, 531 allows the number of phase bits to be digitally controlled after transmit active antenna polarizer 500 is fabricated if adequate DAC resolution and AGC dynamic range exists. In an exemplary embodiment with adequate DAC resolution and AGC dynamic range, any desired vector phase and amplitude can be produced with arbitrarily fine quantization steps using digital control. In another exemplary embodiment, DACs 530, 531 may be operationally reconfigured after transmit active antenna polarizer 500 is fabricated in order to facilitate adjustment of the signal amplitudes.
- a receive active antenna polarizer may be considered a basic receive embodiment which is configured to be implemented in a variety of different phased array antenna architectures.
- the basic receive embodiment is used in any frequency band and with different polarizations.
- the basic receive embodiment may be used as the basis for phased array antenna receiving in linear polarization, circular polarization, or elliptical polarization.
- the vector generators control the phase of the antenna signal as described herein.
- phased array antenna system embodiments vary in terms of architecture, use of passive or active components, and whether differential or non-differential signaling is implemented.
- phased array architecture are described in terms of a receive architecture, similar architectures could be implemented for transmitting signals in a phased array antenna.
- RF power splitters would replace RF power combiners in the embodiments to facilitate the transmission of an RF signal.
- a combiner is in communication with two vector generators.
- the combiner may be either active or passive (see Figures 6 and 7).
- a phased array antenna 600 comprises an active combiner 610, two vector generators 620, 621, and two DACs 630, 631.
- a radiating element 601 is in communication with phased array antenna 600.
- Two spatially orthogonal feed ports of radiating element 601 transmit two input signals to vector generators 620, 621.
- the input signals are communicated through the two vector generators 620, 621 in parallel and actively summed to generate an RF output signal.
- the input signals may be linear, right-hand circular, left-hand circular, or elliptically polarized.
- the linear input signals may also be vertical and horizontal polarized.
- Vector generators 620, 621 enables phased array antenna 600 to have two degrees of freedom to allow the desired polarization to be detected and beam steering to be accomplished.
- vector generator 620 may be used for beam steering while vector generator 621 offsets the phase of vector generator 620 by ⁇ 90 degrees to provide detection of RHCP signals or LHCP signals. Similar embodiments allow for the beam steering and polarization tracking of elliptically polarized signals as well.
- a phased array antenna 700 comprises a passive power combiner 710, two vector generators 720, 721, and two DACs 730, 731. Input signals are communicated through two vector generators 720, 721 in parallel and passively combined at passive power combiner 710 to generate an RF output signal.
- passive power combiner 710 may be a Wilkinson power divider configured to combine the two vector generator outputs.
- passive power combiner 710 may be any suitable power combiner now known or herein after devised.
- the input signals may be linear, right-hand circular, left-hand circular, or elliptically polarized.
- the linear input signals may also be vertical and horizontal polarized.
- phased array antenna 700 is capable of beam steering as described with respect to phased array antenna 600.
- an RF hybrid is combined with two parallel vector generators and a combiner.
- the addition of an RF hybrid enables detection of LHCP and RHCP signals simultaneously.
- the combiner can be either active or passive.
- the hybrid can be active or passive.
- the hybrid may be a 90° hybrid or a 180° hybrid.
- Figure 8 illustrates an exemplary phased array antenna 800 comprising an active RF hybrid 810 with a 90° phase shift, two vector generators 820, 821, two DACs 830, 831, and an active combiner 840.
- the output signal is a composite of the two input signals.
- Figure 9 illustrates an exemplary phased array antenna 900 comprising an active RF hybrid 910 with a 180° phase shift, two vector generators 920, 921 , two DACs 930, 931, and an active combiner 940.
- the two outputs of the 180° active RF hybrid 910 have a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of the active RF hybrid 910.
- the output signal is a composite of the two input signals.
- a phased array antenna 1000 comprises a 90° active RF hybrid 1010, two vector generators 1020, 1021 , two DACs 1030, 1031 , and a passive power combiner 1040.
- This embodiment and the components are similar to the embodiment in Figure 8, except the passive power combiner 1040 is implemented instead of an active power combiner.
- the output signal is a composite of the two input signals.
- phased array antenna 1000 has higher loss and narrower bandwidth compared to phased array antenna 800.
- the active hybrid could also be implemented as a 180' active hybrid.
- a phased array antenna 1 100 comprises a 180° active RF hybrid 11 10, two vector generators 1 120, 1 121 , two DACs 1130, 1131 , and a passive power combiner 1140.
- passive power combiner 1140 may be a Wilkinson power divider.
- passive power combiner 1 140 may be any suitable power combiner now known or herein after devised.
- the two outputs of active RF hybrid 1 1 10 have a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of active RF hybrid 1110.
- the two outputs of active RF hybrid 1110 may be any combination of phase slants that result in a 90° phase difference.
- the output signal is a composite of the two input signals.
- a hybrid may also be a passive component.
- Figure 12 illustrates a phased array antenna 1200 comprising a 90° passive hybrid 1210, two vector generators 1220, 1221, two DACs 1230, 1231 , and an active combiner 1240.
- the output signals of 90° passive hybrid 1210 may be a right-hand circular, a left-hand circular, or elliptically polarized signal.
- the 90° passive hybrid 1210 may, for example, be a branchline coupler or a Lange coupler.
- the output signals of 90° passive hybrid 1210 are each a composite of the two input signals received from a radiating element.
- the main difference between 90° passive hybrid 1210 and 90° active RF hybrid 1010 is the size of the components, with 90° active RF hybrid 1010 being substantially smaller, in addition to the various advantages of active components as previously described.
- a phased array antenna 1300 comprises a 180° passive hybrid 1310, two vector generators 1320, 1321 , two DACs 1330, 1331, and an active combiner 1340.
- the two outputs of the 180° passive hybrid 1310 have a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of the passive hybrid 1310.
- the output signal is a single linearly polarized signal.
- the 180° passive hybrid 1310 may be a ring hybrid or a magic tee.
- a phased array antenna 1400 comprises a 90° passive hybrid 1410, two vector generators 1420, 1421 , two UACs 1430, 1431 , and a passive power combiner 1440.
- the output of passive hybrid 1410 may be a right-hand circular, left-hand circular, or elliptically polarized signal.
- the 90° passive hybrid 1410 may be a branchline coupler or a Lange coupler.
- passive power combiner 1440 may be a Wilkinson power divider.
- passive power combiner 1440 may be any suitable power combiner now known or herein after devised. As with the other exemplary power combiners, the output of passive power combiner 1440 is a composite of the two input signals.
- Figure 15 illustrates a phased array antenna 1500 comprising a 180° passive hybrid 1510, two vector generators 1520, 1521, two DACs 1530, 1531, and a passive power combiner 1540.
- the two outputs of 180° passive hybrid 1510 have a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of 180° passive hybrid 1510.
- 180° passive hybrid 15 10 may be a ring hybrid or a magic tee.
- passive power combiner 1540 may be a Wilkinson power divider.
- passive power combiner 1540 may be any suitable power combiner now known or herein after devised.
- the output signal of passive power combiner 1540 is a composite of the two input signals.
- an active phased array antenna can also be configured for dual linear polarization with polarization tracking and beam steering.
- a phased array antenna with two parallel vector generators and a hybrid is illustrated.
- the hybrid may be either active or passive.
- the hybrid may be a 90° hybrid or a 180° hybrid.
- a phased array antenna 1600 comprises two vector generators 1620, 1621, two DACs 1630, 1631, and an active RF hybrid 1640.
- Active RF hybrid 1640 may be either a 90° hybrid or a 180° hybrid.
- the two output signals of the active RF hybrid 1640 are composites of the two input signals, with a phase difference between the output signals.
- the output signals In an embodiment with active RF hybrid 1640 comprising a 90° hybrid, the output signals have an approximate 90° phase difference. In an embodiment with active RF hybrid 1640 comprising a 180° hybrid, the output signals have an approximate 180° phase difference.
- the vector generators 1620, 1621 may be configured to provide phase and amplitude adjustment of RF signals for polarization tracking and beam steering.
- FIG. 17 illustrates a phased array antenna 1700 comprising two vector generators 1720, 1721, two DACs 1730, 1731, and a passive hybrid 1740.
- Passive RF hybrid 1740 may be either a 90° hybrid or a 180° hybrid.
- the passive hybrid 1740 may be at least one of a Lange coupler or a branchline coupler for a 90° hybrid, or at least one of a ring hybrid or a magic tee for a 180° hybrid.
- the output signals of passive hybrid 1740 are composites of the two input signals, with a phase difference between the output signals. In an embodiment with passive hybrid 1740 comprising a 90° hybrid, the output signals have an approximate 90° phase difference. In an embodiment with passive hybrid 1740 comprising a 180° hybrid, the output signals have an approximate 180° phase difference.
- the vector generators 1720, 1721 may be configured to provide phase and amplitude adjustment of RF signals for polarization tracking and beam steering.
- a phased array antenna may include two parallel vector generators and two hybrids.
- the hybrids may be either active or passive.
- the hybrids may be a 90° hybrid or a 180° hybrid.
- a phased array antenna 1800 comprises a first active RF hybrid 1810, two vector generators 1820, 1821, two DACs 1830, 1831, and a second active RF hybrid 1840.
- First active RF hybrid 1810 may be either a 90° hybrid or a 180° hybrid.
- Second active RF hybrid 1840 may be either a 90° hybrid or a 180° hybrid.
- the first active RF hybrid 1810 is configured to receive polarized input signals from a radiating element 1801.
- first active RF hybrid 1810 generates intermediate signals with right-hand and left-hand circular polarizations. In another embodiment, first active RF hybrid 1810 generates intermediate signals that have approximately a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of the active RF hybrid 1810.
- the vector generators 1820, 1821 may be configured to provide phase adjustment for polarization tracking and beam steering.
- second active RF hybrid 1840 is configured to generate output signals that are composites of the input signals.
- Figure 19 illustrates a phased array antenna 1900 comprising an active RF hybrid 1910, two vector generators 1920, 1921, two DACs 1930, 1931, and a passive hybrid 1940.
- Active RF hybrid 1910 may be either a 90° hybrid or a 180° hybrid.
- Passive hybrid 1940 may be either a 90° hybrid or a 180° hybrid.
- the active RF hybrid 1910 is configured to receive polarized input signals from a radiating element 1901.
- active RF hybrid 1910 generates intermediate signals with right-hand and left-hand circular polarizations.
- active RF hybrid 1910 generates intermediate signals that have approximately a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of active RF hybrid 1910.
- vector generators 1920, 1921 may be configured to provide phase adjustment for polarization tracking and beam steering.
- passive hybrid 1940 is configured to generate output signals that are composites of the input signals.
- passive hybrid 1940 may be at least one of a Lange coupler or a branchline coupler for a 90° hybrid, or at least one of a ring hybrid or a magic tee for a 180° hybrid.
- the hybrid in communication with a radiating element could be a passive hybrid.
- a phased array antenna 2000 comprises a passive hybrid 2010, two vector generators 2020, 2021, two DACs 2030, 2031 , and an active RF hybrid 2040.
- Passive hybrid 2010 may be either a 90° hybrid or a 180° hybrid.
- Active RF hybrid 2040 may be either a 90° hybrid or a 180° hybrid.
- the passive hybrid 2010 is configured to receive polarized input signals from a radiating element 2001.
- the passive hybrid 2010 generates intermediate signals with right-hand and left-hand circular polarizations. In another embodiment the passive hybrid 2010 generates intermediate signals that have approximately a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of the passive hybrid 2010.
- the passive hybrid 2010 may be at least one of a Lange coupler or a branchline coupler for a 90° hybrid, or at least one of a ring hybrid or a magic tee for a 180° hybrid.
- the vector generators 2020, 2021 may be configured to provide phase adjustment for polarization tracking and beam steering.
- the active RF hybrid 2040 is configured to generate output signals that are composites of the input signals. Another configuration of the phased array antenna may include two passive hybrids.
- a phased array antenna 2100 comprises a first passive hybrid 21 10 with either a 90° or a 180° phase shift, two vector generators 2120, 2121, two DACs 2130, 2131, and a second passive hybrid 2140 with either a 90° or a 180° phase shift.
- First passive hybrid 21 10 may be either a 90° hybrid or a 180° hybrid.
- Second passive hybrid 2140 may be either a 90° hybrid or a 180° hybrid.
- the first passive hybrid 2110 is configured to receive the polarized input signals from a radiating element 2101. In one embodiment, first passive hybrid 2110 generates intermediate signals with right-hand and left-hand circular polarizations.
- first passive hybrid 2110 generates intermediate signals that have approximately a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of first passive hybrid 2110.
- vector generator 2120 receives a first intermediate signal communicated from first passive hybrid 2110.
- Vector generator 2121 receives a second intermediate signal also communicated from first passive hybrid 2110.
- Vector generators 2120, 2121 are respectively configured to adjust at least one of the phase and amplitude of a received signal and generate an adjusted signal.
- the second passive hybrid 2140 is configured to receive adjusted signals from vector generators 2120, 2121 and configured to generate output signals that are composites of the adjusted signals.
- the first and second passive hybrids 2110, 2140 may be at least one of a Lange coupler or a branchline coupler for a 90° hybrid, or at least one of a ring hybrid or a magic tee for a 180° hybrid.
- an active phased array antenna can also be configured for dual circular polarization with beam steering.
- a phased array antenna comprises a 90° hybrid in communication with a radiating element and parallel vector generators.
- the 90° hybrid may be active or passive.
- a phased array antenna 2200 comprises an active 90° RF hybrid 2210, two vector generators 2220, 2221, and two DACs 2230, 2231.
- the active 90° RF hybrid 2210 is configured receive signals from a radiating element 2201 and to generate intermediate signals with right-hand and left- hand circular polarization.
- the intermediate signals are each a composite signal of the signals received from radiating element 2201.
- the two vector generators 2220, 2221 are in communication with active 90° RF hybrid 2210.
- Vector generator 2220 and vector generator 2221 individually generate an RF output signal with circular polarization.
- vector generators 2220, 2221 provide phase adjustment for beam steering.
- a phased array antenna 2300 comprises a passive 90° hybrid 2310, two vector generators 2320, 2321 , and two DACs 2330, 2331.
- the passive 90° hybrid 2310 may be a branchline coupler or a Lange coupler, and/or the like.
- passive 90° hybrid 23 10 is configured to receive signals from a radiating element 2301 and to generate intermediate signals with right-hand and left-hand circular polarization.
- the two vector generators 2320, 2321 are in communication with passive 90° hybrid 2310 and each receive a separate intermediate signal.
- vector generators 2320, 2321 individually output an RF output signal that is a composite of the intermediate signals.
- vector generators 2320, 2321 provide phase adjustment for beam steering.
- a multi-beam architecture 2400 comprises multiple radiating elements (REi, RE 2 ,... RE N ) with each radiating element being in communication with an active polarization control (PCi, PC 2 , .. .PC N ).
- the multi-beam architecture 2400 further comprises at last one beam forming network (BFNi, BFN 2 ,... BFN M ) and at least one phase shifter connected to the active polarization control (PCi, PC 2 ,...PCisi) per beam forming network (BFNi, BFN?, . . .BFN M ).
- each radiating element is in communication with M phase shifters, and each phase shifter is in communication with TVf beam forming networks so that each beam forming network receives a signal from each radiating element.
- the phase shifters may be active vector generators, similar to vector generator 400, or any other component suitable to phase shift the signals.
- the beam forming networks and summing junctions can be passive or active.
- a multi-beam architecture may similarly be implemented for transmission of RF signals.
- the active polarization control functions PCi
- PC2, .. .PC N can be any of the embodiments previously listed herein.
- a power splitter for receive applications
- power combiner for transmit applications
- the power splitter or power combiner can be implemented as a passive or active structure as described previously herein.
- In communication with the power splitter/combiner is a set of vector generators where each vector generator provides a phase shift in support of a particular beam. M vector generators are required to support M independently steerable beams.
- the set of vector generators is in communication with a power combiner (for receive applications) or power splitter (for transmit applications) to complete the beam formation process.
- the power splitter or power combiner can be implemented as a passive or active structure as described previously herein.
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Abstract
In an exemplary embodiment, a phased array solid-state architecture has dual-polarized feeds and is manufactured, for example, on highly flexible silicon germanium (SiGe). The implementation of dual-polarized feeds facilitates the operation of phased arrays where the polarization can be statically or dynamically controlled on a subarray or element basis. In an exemplary embodiment, the sub-component control is configured to optimize a performance characteristic associated with polarization, such as phase or amplitude adjustment. An active phased array architecture may replace traditional distributed and GaAs implementations for the necessary functions required to operate electronically steerable phased array antennas. The architecture combines active versions of vector generators, power splitters, power combiners, and RF hybrids in a novel fashion to realize a fully or substantially monolithic solution for a wide range of antenna applications that can be realized with radiating elements having single-polarized or dual-polarized feeds.
Description
ACTIVE PHASED ARRAY ARCHITECTURE
Background of the invention
A phased array antenna uses multiple radiating elements to transmit, receive, or transmit and receive radio frequency (RF) signals. Phase shifters are used in a phased array antenna in order to steer the beam of the signals by controlling the respective phases of the RF signals communicated through the phase shifters. Phased array antennas are used in various capacities, including communications on the move (COTM) antennas, satellite communication (SATCOM) airborne terminals, SATCOM mobile communications, and SATCOM earth terminals. The application of mobile terminals typically requires the use of automatic tracking antennas that are able to steer the beam in azimuth, elevation, and polarization to follow the satellite's position while the terminal is in motion. Moreover, a phased array antenna is typically desired to be "low-profile", small and lightweight, thereby fulfilling the stringent aerodynamic and mass constraints encountered in the typical mounting.
One well known type of phased array antenna is an electronically steerable phased array antenna. The electronically steerable phased array antenna has full electronic steering capability and is more compact and lower profile than a comparable mechanically steered antenna. The main drawback of fully electronic steering is that the antenna usually requires the integration of numerous expensive analog RF electronic components which may prohibitively raise the cost for commercial applications.
In a typical prior art embodiment, a phased array antenna comprises a radiating element that communicates dual linear signals to a hybrid coupler with either a 90° or a 180° phase shift and then through low noise amplifiers (LNA). Furthermore, the dual linear signals are adjusted by phase shifters before passing through a power combiner.
In the prior art, a typical digital phase shifter uses a switched delay line that is physically large and operates over a narrow band of frequencies due to its distributed nature. Another typical digital phase shifter implements a switched high-pass low-pass filter architecture, which has better operating bandwidth compared to a switched delay line but is still physically large. Also, the phase shifter is often made on gallium arsenide (GaAs). Though other materials may be used, GaAs is a higher quality material designed and controlled to provide good performance of electronic devices. However, in addition to being a higher quality material than other possible materials, GaAs is also more expensive and
more difficult to manufacture. The typical phased array components take up a lot of area on the GaAs, resulting in higher costs. Furthermore, a standard phase shifter has high RF power loss, which is typically about n+1 dB of loss, where n is the number of phase bits in the phase shifter. Another prior art embodiment uses RF MEMS switches and has lower power loss but still consumes similar space and is generally incompatible with monolithic solutions. Furthermore, the typical components in a phased array antenna are distributed components that arc frequency sensitive and designed for specific frequency bands.
Quadrature hybrids or other differential phase generating hybrids are used in a variety of RF applications, including phased array antennas. For example, quadrature hybrids are used for generating circular polarization signals, power combining, or power splitting. Generally, the outputs of a quadrature hybrid have equal amplitude and a 90° phase difference. The quadrature hybrid is often implemented as a distributed structure, such as a Lange coupler, a branchline coupler, or a ring hybrid. Other RF hybrids, such as a magic tee or a ring hybrid, result in 180° phase shift. In general, an RF hybrid uses distributed components, limited in frequency band and requires significant physical space inversely proportional to an operating frequency. Moreover, the quadrature hybrid is typically made of GaAs and has associated RF power loss on the order of 3-4 dB per hybrid when used as a power splitter.
An in-phase hybrid may be configured as a power combiner or power splitter in a variety of RF applications, including phased array antennas. In an exemplary embodiment, the outputs of an in-phase hybrid have equal amplitude and a substantially zero differential phase difference. In another exemplary embodiment, the inputs of an in-phase hybrid configured as a power combiner encounter substantially zero differential phase and amplitude summation of the two input signals. In a typical embodiment of a power combiner, the in-phase hybrid is implemented as a distributed structure such as a Wilkinson hybrid. In general, an in-phase hybrid is limited in frequency band and requires significant physical space that is inversely proportional to the operating frequency. Like the quadrature hybrid, the in-phase hybrid is typically made on GaAs. Moreover, the in-phase hybrid generally has associated RF power loss on the order of 3-4 dB per hybrid when used as a power splitter and an associated RF power loss of about 1 dB when used as a power combiner.
Thus, a need exists for a phased array antenna architecture that is not frequency limited or polarization specific. Furthermore, the antenna architecture should be able to be
manufactured on a variety of materials and with little or no associated RF power loss. Also, a need exists for a phased array antenna that uses less space than a similar capability prior art architecture, and is suitable for a monolithic implementation.
Summary
In an exemplary embodiment, a phased array solid-state architecture has dual- polarized feeds and is manufactured, for example, on highly flexible silicon germanium (SiGe). The implementation of dual -polarized feeds facilitates the operation of phased arrays where the polarization can be statically or dynamically controlled on a subarray or element basis. In an exemplary embodiment, the sub-component control is configured to optimize a performance characteristic associated with polarization, such as phase or amplitude adjustment.
An active phased array architecture may replace traditional distributed and GaAs implementations for the necessary functions required to operate electronically steerable phased array antennas. The architecture combines active versions of vector generators, power splitters, power combiners, and RF hybrids in a novel fashion to realize a fully or substantially monolithic solution for a wide range of antenna applications that can be realized with radiating elements having single-polarized or dual-polarized feeds.
In accordance with an exemplary embodiment, a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a 90° hybrid configured to receive dual linearly polarized RF signals from the radiating element, a first vector generator, and a second vector generator. The 90° hybrid is configured to inject a 90° phase shift and generate a RHCP intermediate signal and a LHCP intermediate signal. The first vector generator is configured to receive the RHCP intermediate signal, phase adjust the RCHP intermediate signal for beam steering, and output a first RF signal. The second vector generator configured to receive the LHCP intermediate signal, phase adjust the LCHP intermediate signal for beam steering, and output a second RF signal.
In an exemplary embodiment, a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a first vector generator, a second vector generator, and a hybrid. The first vector generator is configured to receive a first signal from the radiating element, provide phase and amplitude adjustment of the first signal for polarization tracking and beam steering, and output a first intermediate signal. The second vector generator is configured to receive a second signal from the radiating element,
provide phase and amplitude adjustment of the second signal for polarization tracking and beam steering, and output a second intermediate signal. The hybrid is configured to receive the first intermediate signal and the second intermediate signal and generate two RF output signals with a phase difference. Furthermore, the two RF output signals are each a composite of the first intermediate signal and the second intermediate signal.
In another exemplary embodiment, a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a first vector generator, a second vector generator, and a combiner. The first vector generator is configured to receive a first signal from the radiating element, provide phase and amplitude adjustment of the first signal for polarization tracking and beam steering, and to output a first intermediate signal. The second vector generator is configured to receive a second signal from the radiating element, provide phase and amplitude adjustment of the second signal for polarization tracking and beam steering, and to output a second intermediate signal. The combiner is configured to receive the first intermediate signal and the second intermediate signal, and combine the two signals into an RF output signal.
In yet another exemplary embodiment, a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a hybrid, a first vector generator, a second vector generator, and a combiner. The hybrid is configured to receive dual linearly polarized RF signals from the radiating element, inject a phase shift, and generate a RHCP intermediate signal and a LHCP intermediate signal. The first vector generator is configured to receive the RHCP intermediate signal, phase adjust the RCHP intermediate signal for beam steering, and output a first RF intermediate signal. The second vector generator is configured to receive the LHCP intermediate signal, phase adjust the LCHP intermediate signal for beam steering, and output a second RF intermediate signal. Furthermore, in the exemplary embodiment, the combiner is configured to receive the first RF intermediate signal and the second RF intermediate signal, and combine the two signals into an RF output signal.
Furthermore, in an exemplary embodiment, a phased array antenna is in communication with a radiating element, and the phased array antenna comprises a hybrid, a first vector generator, a second vector generator, and an output hybrid. The hybrid is configured to receive dual linearly polarized RF signals from the radiating element, inject a phase shift, and generate a RHCP intermediate signal and a LHCP intermediate signal. The first vector generator is configured to receive the RHCP intermediate signal, phase adjust the
RCHP intermediate signal for beam steering, and output a first RF intermediate signal. The second vector generator is configured to receive the LHCP intermediate signal, phase adjust the LCHP intermediate signal for beam steering, and output a second RF intermediate signal. Furthermore, the output hybrid is configured to receive the first RF intermediate signal and the second RF intermediate signal and generate two RF output signals with a phase difference. The two RF output signals are a composite of the first and second RF intermediate signals.
Brief Description of the Drawing Figures A more complete understanding of the present invention may be derived by referring to the detailed description and claims when considered in connection with the drawing figures, wherein like reference numbers refer to similar elements throughout the drawing figures, and:
FIG. 1 illustrates an exemplary embodiment of an active power splitter; FIG. 2 illustrates an exemplary embodiment of an active power combiner;
FIG. 3 illustrates an exemplary embodiment of an active RF hybrid; FIG. 4 illustrates an exemplary embodiment of an active vector generator; FIG. 5 illustrates an exemplary embodiment of an active antenna signal polarizer; FIG. 6 illustrates an exemplary embodiment of a phased array antenna comprising an active combiner and configured for phase adjustment;
FIG. 7 illustrates an exemplary embodiment of a phased array antenna comprising a passive power combiner and configured for phase adjustment;
FIG. 8 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid configured for 90° operation and an active combiner, the phased array antenna being configured for phase adjustment;
FIG. 9 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid configured for 180° operation and an active combiner, the phased array antenna being configured for phase adjustment;
FIG. 10 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid configured for 90° operation and a passive power combiner, the phased array antenna being configured for phase adjustment;
FIG. 11 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid configured for 180° operation and a passive power combiner, the phased array antenna being configured for phase adjustment;
FIG. 12 illustrates an exemplary embodiment of a phased array antenna comprising a passive 90° hybrid and an active combiner and configured for phase adjustment;
FIG. 13 illustrates an exemplary embodiment of a phased array antenna comprising a passive 180° hybrid and an active combiner and configured for phase adjustment;
FIG. 14 illustrates an exemplary embodiment of a phased array antenna comprising a passive 90° hybrid and a passive power combiner and configured for phase adjustment; FIG. 15 illustrates an exemplary embodiment of a phased array antenna comprising a passive 180° hybrid and a passive power combiner and configured for phase adjustment;
FIG. 16 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid and configured for phase adjustment;
FIG. 17 illustrates an exemplary embodiment of a phased array antenna comprising a passive hybrid and configured for phase adjustment;
FIG. 18 illustrates an exemplary embodiment of a phased array antenna comprising two active RF hybrids and configured for phase adjustment;
FIG. 19 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid and a passive hybrid and configured for phase adjustment; FIG. 20 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid and a passive hybrid and configured for phase adjustment;
FIG. 21 illustrates an exemplary embodiment of a phased array antenna comprising two passive hybrids and configured for phase adjustment;
FIG. 22 illustrates an exemplary embodiment of a phased array antenna comprising an active RF hybrid and configured for phase adjustment;
FIG. 23 illustrates an exemplary embodiment of a phased array antenna comprising a passive hybrid and configured for phase adjustment; and
FIG. 24 illustrates an exemplary embodiment of a multi-beam architecture.
Detailed Description of the Invention
While exemplary embodiments are described herein in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that logical material, electrical, and mechanical changes
may be made without departing from the spirit and scope of the invention. Thus, the following detailed description is presented for purposes of illustration only.
A phased array antenna generally comprises multiple radiating elements, with each radiating element having a polarization component. In an exemplary embodiment, the radiating element has spatially orthogonal linear polarizations, spatially and electrically orthogonal circular polarizations, or spatially orthogonal and electrically non-orthogonal elliptical polarizations.
The polarization component of each radiating element may have one or more signals fed to the ports. In an exemplary embodiment, each radiating element has two feed ports and results in an unbalanced feed system. In yet another exemplary embodiment, each radiating element has three feed ports and results in a partially balanced feed system. In another exemplary embodiment, each radiating element has four feed ports and results in a fully balanced feed system.
In an exemplary embodiment, a phased array antenna with two feed ports is configured to generate and control different polarizations. Exemplary polarization states include a single circular polarization state, a single elliptical polarization state, a single linear polarization state, and two orthogonal polarization states.
The radiating elements may be in communication with an RF integrated circuit
(RFIC). In an exemplary embodiment, the RFIC is configured to divide, alter, and re-mix the component RF signal to produce or detect various polarization states. For receiver applications, the RF signal corresponding to the detected polarization state in the RFIC may additionally be combined in a beam-forming network of the array. Conversely, for transmitter applications, the RFIC can receive input signals from a beam-forming network of the array and produce any desired polarization state. In an exemplary embodiment, a phased array antenna comprises various components. The various components may include a vector generator, an active power splitter, an active power combiner, an active RF hybrid, or the like.
Active Splitter: Figure 1 illustrates a schematic of an exemplary active power splitter. In an exemplary embodiment, an active power splitter 100 comprises a differential input subcircuit 1 10, a first differential output subcircuit 120, and a second differential output subcircuit 130. The differential input subcircuit 110 has paired transistors 111, 112 with a common emitter node and is constant current biased, as is typical in a differential amplifier. An input signal is communicated to the base of paired transistors 111, 112 in the
differential input subcircuit 110. Both the first and second differential output subcircuits 120, 130 comprise a pair of transistors with a common base node and each common base is connected to ground.
The first differential output subcircuit 120 has a first transistor 121 emitter connected to the collector of one of the input subcircuit transistors 112. The emitter of the second output subcircuit transistor 122 is connected to the collector of the other input subcircuit transistor 111. In the exemplary embodiment, the first output is drawn from the collectors of transistors 121, 122 of the first differential output subcircuit 120. Furthermore, the second differential output subcircuit 130 is similarly connected, except the transistor 131, 132 emitters are inversely connected to the input subcircuit transistor 111, 112 collectors with respect to transistors 121 , 122.
By inverting the input subcircuit transistor collector connections between the first and second differential output subcircuits, the first output and the second output are approximately 180° out of phase with each other. In another exemplary embodiment, transistor 131, 132 emitters are non-inversely connected to input subcircuit transistor 11 1, 1 12 collectors, causing the first output and the second output to be approximately in phase with each other. In general, the absolute phase shift of the output signals through the power splitter is not as important as the relative phasing between the first and second output signals. In an exemplary embodiment, active power splitter 100 converts an input RF signal into two output signals. The output signal levels may be equal in amplitude, though this is not required. For a prior art passive power splitter, each output signal would be about 3 dB lower in power than the input signal. In contrast, an exemplary active splitter, such as active power splitter 100, can provide gain and the relative power level between the input signal and the output signal is adjustable and can be selectively designed. In an exemplary embodiment, the output signal is configured to achieve a substantially neutral or positive power gain over the input signal. For example, the output signal may achieve a 3 dB signal power gain over the input signal. In an exemplary embodiment, the output signal may achieve a power gain in the 0 dB to 5 dB range. Moreover, the output signal may be configured to achieve any suitable power gain.
In accordance with an exemplary embodiment, active power splitter 100 produces output signals with a differential phase between the two signals that is zero or substantially
zero. The absolute phase shift of output signals through the active power splitter may not be as important as the differential phasing between the output signals.
In another exemplary embodiment, active power splitter 100 additionally provides matched impedances at the input and output ports. The matched impedances may be 50 ohms, 75 ohms, or other suitable impedances. Furthermore, in an exemplary embodiment, active splitter 100 provides isolation between the output ports of the active power splitter. In one exemplary embodiment, active power splitter 100 is manufactured as a MMIC with a compact size that is independent of the operating frequency due to a lack of distributed components. Active Combiner: In an exemplary embodiment and with reference to Figure 2, an active power combiner 200 comprises a first differential input subcircuit 210, a second differential input subcircuit 220, a single ended output subcircuit 230, and a differential output subcircuit 240. Each differential input subcircuit 210, 220 includes two pairs of transistors, with each transistor of each differential input subcircuit 210, 220 having a common emitter node with constant current biasing, as is typical in a differential amplifier.
A first input signal is communicated to the bases of the transistors in first differential input subcircuit 210. For example, a first line of input signal InI is provided to one transistor of each transistor pair in first differential input subcircuit 210, and a second line of input signal InI is provided to the other transistor of each transistor pair. Similarly, a second input signal is communicated to the bases of the transistors in second differential input subcircuit 220. For example, a first line of input signal In2 is provided to one transistor of each transistor pair in first differential input subcircuit 220, and a second line of input signal In2 is provided to the other transistor of each transistor pair. Furthermore, in an exemplary embodiment, a differential output signal is formed by a combination of signals from collectors of transistors in first and second differential input subcircuits 210, 220.
In an exemplary embodiment, active power combiner 200 converts two input RF signals into a single output signal. The output signal can either be a single ended output at single ended output subcircuit 230, or a differential output at differential output subcircuit 240. In other words, active power combiner 200 performs a function that is the inverse of active power splitter 100. The input signal levels can be of arbitrary amplitude and phase. Similar to an active power splitter, active power combiner 200 can provide gain and the relative power level between the inputs and output is also adjustable and can be selectively designed. In an exemplary embodiment, the output signal achieves a substantially neutral or
positive signal power gain over the input signal. For example, the output signal may achieve a 3 dB power gain over the sum of the input signals. In an exemplary embodiment, the output signal may achieve a power gain in the 0 dB to 5 dB range. Moreover, the output signal may achieve any suitable power gain. In an exemplary embodiment, active power combiner 200 additionally provides matched impedances at the input and output ports. The matched impedances may be 50 ohms, 75 ohms, or other suitable impedances. Furthermore, in an exemplary embodiment, active power combiner 200 provides isolation between the input ports of the power combiner. In yet another exemplary embodiment, the active power combiner 200 implements identical building block components as used in an exemplary active phased array architecture. In one exemplary embodiment, the active power combiner 200 is manufactured as a MMIC with a compact size that is independent of the operating frequency due to a lack of distributed components. Throughout, the active power combiner described in various exemplary embodiments may be similar to the active power combiner described with reference to Figures 6, 8-9, and 12-13.
Active RF Hybrid: In an exemplary embodiment, and with reference to Figure 3, an active RF hybrid 300 comprises a first active power splitter 310, a second active power splitter 31 1, a first vector generator 320, a second vector generator 321 , a first active power combiner 330, a second active power combiner 331, a first digital-to-analog converter (DAC) 340 and a second DAC 341. In accordance with the exemplary embodiment, first active power splitter 310 receives an input at Port 1 and communicates the input to first vector generator 320 and second active power combiner 331. Likewise, second active power splitter 311 receives an input at Port 2 and communicates the input to second vector generator 321 and first active power combiner 330. Vector generators 320, 321 are controlled in part by respective DACs 340, 341. In an exemplary embodiment, a 4-bit DAC is used but any number of bits many be used.
Furthermore, the output of first vector generator 320 is communicated to first active power combiner 330, and the output of second vector generator 321 is communicated to second active power combiner 331. In the exemplary embodiment, first active power combiner 330 receives input from first vector generator 320 and second active power splitter 31 1, and outputs a signal to Port 3. Similarly, second active power combiner 331 receives
input from second vector generator 321 and first active power splitter 310, and outputs a signal to Port 4.
Active RF hybrid 300 may be used to replace various distributed components, such as a branchline coupler, Lange coupler, directional coupler, or 180° hybrid. In accordance with an exemplary embodiment, an active RF hybrid provides similar functionality in comparison to a traditional distributed hybrid. For example, active RF hybrid 300 may be dynamically configured to have variable phase differences between the output ports, which could be 90°, 180°, or some other phase difference. Another example is that active RF hybrid 300 provides port-to-port isolation and matched impedances at the input/output ports. Additional information regarding active RF hybrids is disclosed in the U.S. Patent Application entitled "ACTIVE RF HYBRIDS", Applicant docket number 36956.7200, filed the same day as this application is hereby incorporated by reference.
Furthermore, the active RF hybrid 300 has various advantages over a traditional passive distributed hybrid. In an exemplary embodiment, the active RF hybrid 300 does not result in a loss of power, hut instead has a gain or is at least gain neutral. In another exemplary embodiment, the active RF hybrid 300 does not rely on distributed elements and is capable of operating over very wide bandwidths. In yet another exemplary embodiment, the active RF hybrid 300 implements identical building block components as used in an exemplary active phased array architecture. In one exemplary embodiment, the active RF hybrid 300 is manufactured as a MMIC with a compact size that is independent of the operating frequency due to a lack of distributed components.
Throughout, the active RF hybrid described in various exemplary embodiments may be similar to the active RF hybrid described with reference to Figures 8-11, 16, 18-20, and 22. Vector Generator: In an exemplary embodiment, a vector generator converts an
RF input signal into an output signal (sometimes referred to as an output vector) that is shifted in phase and/or amplitude to a desired level. This replaces the function of a typical phase shifter and adds the capability of amplitude control. In other words, a vector generator is a magnitude and phase control circuit. In the exemplary embodiment, the vector generator accomplishes this function by feeding the RF input signal into a quadrature network resulting in two output signals that differ in phase by about 90°. The two output signals are fed into parallel quadrant select circuits, and then through parallel variable gain amplifiers (VGAs). In an exemplary embodiment, the quadrant select circuits receive
commands and may be configured to either pass the output signals with no additional relative phase shift between them or invert either or both of the output signals by an additional 180°. In this fashion, all four possible quadrants of the 360° continuum are available to both orthogonal signals. The resulting composite output signals from the current summer are modulated in at least one of amplitude and phase.
In accordance with an exemplary embodiment and with reference to Figure 4, a vector generator 400 comprises a passive I/Q generator 410, a first variable gain amplifier (VGA) 420 and a second VGA 421, a first quadrant select 430 and a second quadrant select 431 each configured for phase inversion switching, and a current summer 440. The first quadrant select 430 is in communication with I/Q generator 410 and first VGA 420. The second quadrant select 431 is in communication with I/Q generator 410 and second VGA 421. Furthermore, in an exemplary embodiment, vector generator 400 comprises a digital controller 450 that controls a first digital-to-analog converter (DAC) 460 and a second DAC 461. The first and second DACs 460, 461 control first and second VGAs 421, 420, respectively. Additionally, digital controller 450 controls first and second quadrant selects 430, 431.
In an exemplary embodiment, vector generator 400 controls the phase and amplitude of an RF signal by splitting the RF signal into two separate vectors, the in-phase (I) vector and the quadrature-phase (Q) vector. In one embodiment, the RF signal is communicated differentially. The differential R_F signal communication may be throughout vector generator 400 or limited to various portions of vector generator 400. In another exemplary embodiment, the RF signals are communicated non-differentially. The I vector and Q vector are processed in parallel, each passing through the phase inverting switching performed by first and second quadrant selects 430, 431. The resultant outputs of the phase inverting switches comprise four possible signals: a non-inverted I, an inverted I, a non-inverted Q, and an inverted Q. In this manner, all four quadrants of a phasor diagram are available for further processing by VGAs 420, 421. In an exemplary embodiment, two of the four possible signals non-inverted I, inverted I, non-inverted Q, and inverted Q are processed respectively through VGAs 420, 421, until the two selected signals are combined in current summer 440 to form a composite RF signal. The current summer 440 outputs the composite RF signal with phase and amplitude adjustments. In an exemplary embodiment, the composite RF signal is in differential signal form. In another exemplary embodiment, the composite RF signals are in single-ended form.
In an exemplary embodiment, control for the quadrant shifting and VGA functions is provided by a pair of DACs. In an exemplary embodiment, reconfiguration of digital controller 450 allows the number of phase bits to be digitally controlled after vector generator 400 is fabricated if adequate DAC resolution and automatic gain control (AGC) dynamic range exists. In an exemplary embodiment with adequate DAC resolution and AGC dynamic range, any desired vector phase and amplitude can be produced with selectable fine quantization steps using digital control. In another exemplary embodiment, reconfiguration of DACs 460, 461 can be made after vector generator 400 is fabricated in order to facilitate adjustment of the vector amplitudes. Phased Array Architectures
In accordance with an exemplary embodiment, a phased array antenna comprises active components manufactured on silicon germanium (SiGe) in a monolithic solution. Other materials may be used, such as GaAs, silicon, or other suitable materials now known or hereinafter devised. A monolithic SiGe embodiment using active components results in certain advantages over the distributed/passive network in the prior art, including lower cost, smaller physical size that is independent of operating frequency, wider operating bandwidths, and the ability to provide power gain rather than a power loss.
Additionally, other advantages over the prior art embodiments are possible, depending on the phased array architecture. Some of the advantages include extensive system flexibility and very compact antenna systems because no distributed structures are required. Furthermore, some embodiments employ differential signaling to improve signal isolation when the RF signal is in analog form.
Some of the main advantages include that RF signals undergo a neutral or slight positive power gain when being communicated through the antenna system, rather than power losses that occur in the passive prior art systems. Another advantage is that the antenna system is not band limited. In other words, the antenna system is applicable to all frequency bands, including X, K, Ku, Ka, and Q bands. In an exemplary embodiment, the antenna system operates over specific frequency ranges, such as 2-20 GHz, 20-40 GHz, or 30-45 GHz. In an exemplary embodiment, multi-band antennas are a practical option as a product.
Reconfigurability of the antenna system is also an advantage. In an exemplary embodiment, the antenna system includes the ability to reconfigure the number of phase bits in a DAC over full product life. In another exemplary embodiment, the antenna system is able to reconfigure the amplitude taper of the system over full product life. In yet another exemplary embodiment, the antenna system is able to reconfigure the system polarization over full product life. In an exemplary embodiment with adequate DAC resolution and AGC dynamic range, any arbitrary vector phase and amplitude can be produced with arbitrarily fine quantization steps using digital control.
Throughout, the vector generator described in various exemplary embodiments may be similar to the vector generator described with reference to Figures 5-24.
Active Antenna Polarizer: In accordance with an exemplary embodiment, an active antenna polarizer comprises a monolithic, digitally controlled active implementation for processing an RF signal. Two output RF signals communicate with a single radiating element and are digitally controlled to provide any desired polarization phase or amplitude to the radiating element. In an exemplary embodiment, the active antenna polarizer comprises active components and results in no power loss in the communicated signals. Furthermore, in another exemplary embodiment, the active antenna polarizer is configured to operate over multiple frequency bands.
In an exemplary embodiment, and with reference to Figure 5, a transmit active antenna polarizer 500 comprises an active power splitter 510, two vector generators 520, 521 , and two DACs 530, 531. An input signal is actively split and transmitted through two vector generators 520, 521 in parallel. The vector generators 520, 521 are controlled by DACs 530, 531 , and each vector generator produces a linear output signal. These two linear outputs are then used to energize the two spatially orthogonal feed ports of a radiating element (not shown). In another exemplary embodiment, the feeds to the radiating element can be differential in nature resulting in four feeds to the radiating element. In yet another exemplary embodiment, one of the feeds to the radiating elements can be differential while the other remains single-ended in nature resulting in three feeds to the radiating element.
The transmit active antenna polarizer 500 may be considered a basic transmit embodiment which is configured to be implemented in a variety of different phased array antenna architectures. In an exemplary embodiment, the basic transmit embodiment is used in any frequency band and with different polarizations. For example, and as described below, the basic transmit embodiment may be used as the basis for phased array antenna
transmitting in linear polarization, circular polarization, or elliptical polarization. In accordance with an exemplary embodiment, in order to operate in these different polarizations, vector generators 520, 521 control the phase of the antenna signal.
In an exemplary embodiment, reconfiguration of DACs 530, 531 allows the number of phase bits to be digitally controlled after transmit active antenna polarizer 500 is fabricated if adequate DAC resolution and AGC dynamic range exists. In an exemplary embodiment with adequate DAC resolution and AGC dynamic range, any desired vector phase and amplitude can be produced with arbitrarily fine quantization steps using digital control. In another exemplary embodiment, DACs 530, 531 may be operationally reconfigured after transmit active antenna polarizer 500 is fabricated in order to facilitate adjustment of the signal amplitudes.
A receive active antenna polarizer (not shown) may be considered a basic receive embodiment which is configured to be implemented in a variety of different phased array antenna architectures. In an exemplary embodiment, the basic receive embodiment is used in any frequency band and with different polarizations. For example, and as described below, the basic receive embodiment may be used as the basis for phased array antenna receiving in linear polarization, circular polarization, or elliptical polarization. In accordance with an exemplary embodiment, in order to operate in these different polarizations, the vector generators control the phase of the antenna signal as described herein.
Described below are various specific phased array antenna system embodiments. The embodiments vary in terms of architecture, use of passive or active components, and whether differential or non-differential signaling is implemented. Though the exemplary embodiments of a phased array architecture are described in terms of a receive architecture, similar architectures could be implemented for transmitting signals in a phased array antenna. For example, RF power splitters would replace RF power combiners in the embodiments to facilitate the transmission of an RF signal.
In one exemplary embodiment, a combiner is in communication with two vector generators. The combiner may be either active or passive (see Figures 6 and 7). In an exemplary embodiment and with reference to Figure 6, a phased array antenna 600 comprises an active combiner 610, two vector generators 620, 621, and two DACs 630, 631. A radiating element 601 is in communication with phased array antenna 600. Two spatially orthogonal feed ports of radiating element 601 transmit two input signals to vector
generators 620, 621. The input signals are communicated through the two vector generators 620, 621 in parallel and actively summed to generate an RF output signal. The input signals may be linear, right-hand circular, left-hand circular, or elliptically polarized. The linear input signals may also be vertical and horizontal polarized. Vector generators 620, 621 enables phased array antenna 600 to have two degrees of freedom to allow the desired polarization to be detected and beam steering to be accomplished. In an exemplary embodiment, vector generator 620 may be used for beam steering while vector generator 621 offsets the phase of vector generator 620 by ±90 degrees to provide detection of RHCP signals or LHCP signals. Similar embodiments allow for the beam steering and polarization tracking of elliptically polarized signals as well.
Passive components may also be implemented in phased array antennas. In an exemplary embodiment, and with reference to Figure 7, a phased array antenna 700 comprises a passive power combiner 710, two vector generators 720, 721, and two DACs 730, 731. Input signals are communicated through two vector generators 720, 721 in parallel and passively combined at passive power combiner 710 to generate an RF output signal. In one embodiment, passive power combiner 710 may be a Wilkinson power divider configured to combine the two vector generator outputs. In another embodiment, passive power combiner 710 may be any suitable power combiner now known or herein after devised. The input signals may be linear, right-hand circular, left-hand circular, or elliptically polarized. The linear input signals may also be vertical and horizontal polarized. Furthermore, phased array antenna 700 is capable of beam steering as described with respect to phased array antenna 600.
In an exemplary embodiment, an RF hybrid is combined with two parallel vector generators and a combiner. The addition of an RF hybrid enables detection of LHCP and RHCP signals simultaneously. The combiner can be either active or passive. Similarly, the hybrid can be active or passive. Furthermore, the hybrid may be a 90° hybrid or a 180° hybrid. Figure 8 illustrates an exemplary phased array antenna 800 comprising an active RF hybrid 810 with a 90° phase shift, two vector generators 820, 821, two DACs 830, 831, and an active combiner 840. The output signal is a composite of the two input signals. Similarly, Figure 9 illustrates an exemplary phased array antenna 900 comprising an active RF hybrid 910 with a 180° phase shift, two vector generators 920, 921 , two DACs 930, 931, and an active combiner 940. In one embodiment, the two outputs of the 180° active RF hybrid 910 have a 90° phase difference. More specifically, the two outputs are +/-
45° phase slanted from the inputs of the active RF hybrid 910. The output signal is a composite of the two input signals.
In an exemplary embodiment and with reference to Figure 10, a phased array antenna 1000 comprises a 90° active RF hybrid 1010, two vector generators 1020, 1021 , two DACs 1030, 1031 , and a passive power combiner 1040. This embodiment and the components are similar to the embodiment in Figure 8, except the passive power combiner 1040 is implemented instead of an active power combiner. The output signal is a composite of the two input signals. Moreover, phased array antenna 1000 has higher loss and narrower bandwidth compared to phased array antenna 800. As previously mentioned, the active hybrid could also be implemented as a 180' active hybrid. In an exemplary embodiment and with reference to Figure 1 1 , a phased array antenna 1 100 comprises a 180° active RF hybrid 11 10, two vector generators 1 120, 1 121 , two DACs 1130, 1131 , and a passive power combiner 1140. As an example, passive power combiner 1140 may be a Wilkinson power divider. In another embodiment, passive power combiner 1 140 may be any suitable power combiner now known or herein after devised. In one embodiment, the two outputs of active RF hybrid 1 1 10 have a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of active RF hybrid 1110. In an exemplary embodiment, the two outputs of active RF hybrid 1110 may be any combination of phase slants that result in a 90° phase difference. The output signal is a composite of the two input signals.
In addition to passive combiners, a hybrid may also be a passive component. Figure 12 illustrates a phased array antenna 1200 comprising a 90° passive hybrid 1210, two vector generators 1220, 1221, two DACs 1230, 1231 , and an active combiner 1240. The output signals of 90° passive hybrid 1210 may be a right-hand circular, a left-hand circular, or elliptically polarized signal. The 90° passive hybrid 1210 may, for example, be a branchline coupler or a Lange coupler. The output signals of 90° passive hybrid 1210 are each a composite of the two input signals received from a radiating element. The main difference between 90° passive hybrid 1210 and 90° active RF hybrid 1010 is the size of the components, with 90° active RF hybrid 1010 being substantially smaller, in addition to the various advantages of active components as previously described.
In another exemplary embodiment and with reference to Figure 13, a phased array antenna 1300 comprises a 180° passive hybrid 1310, two vector generators 1320, 1321 , two DACs 1330, 1331, and an active combiner 1340. In one embodiment, the two outputs of the
180° passive hybrid 1310 have a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of the passive hybrid 1310. The output signal is a single linearly polarized signal. In an exemplary embodiment, the 180° passive hybrid 1310 may be a ring hybrid or a magic tee. With reference now to Figure 14, a phased array antenna 1400 comprises a 90° passive hybrid 1410, two vector generators 1420, 1421 , two UACs 1430, 1431 , and a passive power combiner 1440. The output of passive hybrid 1410 may be a right-hand circular, left-hand circular, or elliptically polarized signal. The 90° passive hybrid 1410 may be a branchline coupler or a Lange coupler. Furthermore, passive power combiner 1440 may be a Wilkinson power divider. In another embodiment, passive power combiner 1440 may be any suitable power combiner now known or herein after devised. As with the other exemplary power combiners, the output of passive power combiner 1440 is a composite of the two input signals.
Similarly, Figure 15 illustrates a phased array antenna 1500 comprising a 180° passive hybrid 1510, two vector generators 1520, 1521, two DACs 1530, 1531, and a passive power combiner 1540. In one embodiment, the two outputs of 180° passive hybrid 1510 have a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of 180° passive hybrid 1510. Additionally, in an exemplary embodiment, 180° passive hybrid 15 10 may be a ring hybrid or a magic tee. In one exemplary embodiment, passive power combiner 1540 may be a Wilkinson power divider. In another embodiment, passive power combiner 1540 may be any suitable power combiner now known or herein after devised. Also, the output signal of passive power combiner 1540 is a composite of the two input signals.
In addition to linearly polarized signals as described above, an active phased array antenna can also be configured for dual linear polarization with polarization tracking and beam steering. With reference to Figures 16 and 17, a phased array antenna with two parallel vector generators and a hybrid is illustrated. The hybrid may be either active or passive. Furthermore, the hybrid may be a 90° hybrid or a 180° hybrid. In accordance with an exemplary embodiment and with reference to Figure 16, a phased array antenna 1600 comprises two vector generators 1620, 1621, two DACs 1630, 1631, and an active RF hybrid 1640. Active RF hybrid 1640 may be either a 90° hybrid or a 180° hybrid. The two output signals of the active RF hybrid 1640 are composites of the two input signals, with a phase difference between the output signals. In an embodiment with active RF hybrid 1640
comprising a 90° hybrid, the output signals have an approximate 90° phase difference. In an embodiment with active RF hybrid 1640 comprising a 180° hybrid, the output signals have an approximate 180° phase difference. The vector generators 1620, 1621 may be configured to provide phase and amplitude adjustment of RF signals for polarization tracking and beam steering.
Similarly, Figure 17 illustrates a phased array antenna 1700 comprising two vector generators 1720, 1721, two DACs 1730, 1731, and a passive hybrid 1740. Passive RF hybrid 1740 may be either a 90° hybrid or a 180° hybrid. The passive hybrid 1740 may be at least one of a Lange coupler or a branchline coupler for a 90° hybrid, or at least one of a ring hybrid or a magic tee for a 180° hybrid. Furthermore, the output signals of passive hybrid 1740 are composites of the two input signals, with a phase difference between the output signals. In an embodiment with passive hybrid 1740 comprising a 90° hybrid, the output signals have an approximate 90° phase difference. In an embodiment with passive hybrid 1740 comprising a 180° hybrid, the output signals have an approximate 180° phase difference. The vector generators 1720, 1721 may be configured to provide phase and amplitude adjustment of RF signals for polarization tracking and beam steering.
With reference to Figures 18-21, a phased array antenna may include two parallel vector generators and two hybrids. The hybrids may be either active or passive. Furthermore, the hybrids may be a 90° hybrid or a 180° hybrid. In an exemplary embodiment and with reference to Figure 18, a phased array antenna 1800 comprises a first active RF hybrid 1810, two vector generators 1820, 1821, two DACs 1830, 1831, and a second active RF hybrid 1840. First active RF hybrid 1810 may be either a 90° hybrid or a 180° hybrid. Second active RF hybrid 1840 may be either a 90° hybrid or a 180° hybrid. The first active RF hybrid 1810 is configured to receive polarized input signals from a radiating element 1801. In one embodiment, first active RF hybrid 1810 generates intermediate signals with right-hand and left-hand circular polarizations. In another embodiment, first active RF hybrid 1810 generates intermediate signals that have approximately a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of the active RF hybrid 1810. The vector generators 1820, 1821 may be configured to provide phase adjustment for polarization tracking and beam steering. Also, second active RF hybrid 1840 is configured to generate output signals that are composites of the input signals.
Similarly, Figure 19 illustrates a phased array antenna 1900 comprising an active RF hybrid 1910, two vector generators 1920, 1921, two DACs 1930, 1931, and a passive hybrid 1940. Active RF hybrid 1910 may be either a 90° hybrid or a 180° hybrid. Passive hybrid 1940 may be either a 90° hybrid or a 180° hybrid. The active RF hybrid 1910 is configured to receive polarized input signals from a radiating element 1901. In one embodiment, active RF hybrid 1910 generates intermediate signals with right-hand and left-hand circular polarizations. In another embodiment, active RF hybrid 1910 generates intermediate signals that have approximately a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of active RF hybrid 1910. Furthermore, vector generators 1920, 1921 may be configured to provide phase adjustment for polarization tracking and beam steering. Also, passive hybrid 1940 is configured to generate output signals that are composites of the input signals. In an exemplary embodiment, passive hybrid 1940 may be at least one of a Lange coupler or a branchline coupler for a 90° hybrid, or at least one of a ring hybrid or a magic tee for a 180° hybrid. Furthermore, the hybrid in communication with a radiating element could be a passive hybrid. In an exemplary embodiment and with reference to Figure 20, a phased array antenna 2000 comprises a passive hybrid 2010, two vector generators 2020, 2021, two DACs 2030, 2031 , and an active RF hybrid 2040. Passive hybrid 2010 may be either a 90° hybrid or a 180° hybrid. Active RF hybrid 2040 may be either a 90° hybrid or a 180° hybrid. The passive hybrid 2010 is configured to receive polarized input signals from a radiating element 2001. In one embodiment, the passive hybrid 2010 generates intermediate signals with right-hand and left-hand circular polarizations. In another embodiment the passive hybrid 2010 generates intermediate signals that have approximately a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of the passive hybrid 2010. The passive hybrid 2010 may be at least one of a Lange coupler or a branchline coupler for a 90° hybrid, or at least one of a ring hybrid or a magic tee for a 180° hybrid. Furthermore, the vector generators 2020, 2021 may be configured to provide phase adjustment for polarization tracking and beam steering. Also, the active RF hybrid 2040 is configured to generate output signals that are composites of the input signals. Another configuration of the phased array antenna may include two passive hybrids.
In an exemplary embodiment and with reference to Figure 21 , a phased array antenna 2100 comprises a first passive hybrid 21 10 with either a 90° or a 180° phase shift, two vector generators 2120, 2121, two DACs 2130, 2131, and a second passive hybrid 2140 with either
a 90° or a 180° phase shift. First passive hybrid 21 10 may be either a 90° hybrid or a 180° hybrid. Second passive hybrid 2140 may be either a 90° hybrid or a 180° hybrid. The first passive hybrid 2110 is configured to receive the polarized input signals from a radiating element 2101. In one embodiment, first passive hybrid 2110 generates intermediate signals with right-hand and left-hand circular polarizations. In another embodiment, first passive hybrid 2110 generates intermediate signals that have approximately a 90° phase difference. More specifically, the two outputs are +/- 45° phase slanted from the inputs of first passive hybrid 2110. In an exemplary embodiment, vector generator 2120 receives a first intermediate signal communicated from first passive hybrid 2110. Vector generator 2121 receives a second intermediate signal also communicated from first passive hybrid 2110. Vector generators 2120, 2121 are respectively configured to adjust at least one of the phase and amplitude of a received signal and generate an adjusted signal. The second passive hybrid 2140 is configured to receive adjusted signals from vector generators 2120, 2121 and configured to generate output signals that are composites of the adjusted signals. The first and second passive hybrids 2110, 2140 may be at least one of a Lange coupler or a branchline coupler for a 90° hybrid, or at least one of a ring hybrid or a magic tee for a 180° hybrid.
In addition to embodiments as described above, an active phased array antenna can also be configured for dual circular polarization with beam steering. With momentary reference to Figures 22 and 23, in an exemplary embodiment a phased array antenna comprises a 90° hybrid in communication with a radiating element and parallel vector generators. In an exemplary embodiment, the 90° hybrid may be active or passive. In accordance with an exemplary embodiment and with reference to Figure 22, a phased array antenna 2200 comprises an active 90° RF hybrid 2210, two vector generators 2220, 2221, and two DACs 2230, 2231. The active 90° RF hybrid 2210 is configured receive signals from a radiating element 2201 and to generate intermediate signals with right-hand and left- hand circular polarization. The intermediate signals are each a composite signal of the signals received from radiating element 2201. The two vector generators 2220, 2221 are in communication with active 90° RF hybrid 2210. Vector generator 2220 and vector generator 2221 individually generate an RF output signal with circular polarization. In an exemplary embodiment, vector generators 2220, 2221 provide phase adjustment for beam steering.
Similarly, with reference to Figure 23 and in an exemplary embodiment, a phased array antenna 2300 comprises a passive 90° hybrid 2310, two vector generators 2320, 2321 , and two DACs 2330, 2331. The passive 90° hybrid 2310 may be a branchline coupler or a Lange coupler, and/or the like. Additionally, passive 90° hybrid 23 10 is configured to receive signals from a radiating element 2301 and to generate intermediate signals with right-hand and left-hand circular polarization. The two vector generators 2320, 2321 are in communication with passive 90° hybrid 2310 and each receive a separate intermediate signal. In an exemplary embodiment, vector generators 2320, 2321 individually output an RF output signal that is a composite of the intermediate signals. In an exemplary embodiment, vector generators 2320, 2321 provide phase adjustment for beam steering.
In accordance with an exemplary embodiment and with reference to Figure 24, a multi-beam architecture 2400 comprises multiple radiating elements (REi, RE2,... REN) with each radiating element being in communication with an active polarization control (PCi, PC2, .. .PCN). The multi-beam architecture 2400 further comprises at last one beam forming network (BFNi, BFN2,... BFNM) and at least one phase shifter connected to the active polarization control (PCi, PC2,...PCisi) per beam forming network (BFNi, BFN?, . . .BFNM). In an exemplary embodiment, each radiating element is in communication with M phase shifters, and each phase shifter is in communication with TVf beam forming networks so that each beam forming network receives a signal from each radiating element. In an exemplary embodiment, the phase shifters may be active vector generators, similar to vector generator 400, or any other component suitable to phase shift the signals. Furthermore, the beam forming networks and summing junctions can be passive or active. Moreover, a multi-beam architecture may similarly be implemented for transmission of RF signals. With further reference to Figure 24, the active polarization control functions (PCi,
PC2, .. .PCN) can be any of the embodiments previously listed herein. Connected to each of the active polarization control functions is a power splitter (for receive applications) or power combiner (for transmit applications). The power splitter or power combiner can be implemented as a passive or active structure as described previously herein. In communication with the power splitter/combiner is a set of vector generators where each vector generator provides a phase shift in support of a particular beam. M vector generators are required to support M independently steerable beams. In an exemplary embodiment, the set of vector generators is in communication with a power combiner (for receive
applications) or power splitter (for transmit applications) to complete the beam formation process. The power splitter or power combiner can be implemented as a passive or active structure as described previously herein.
The following applications are related to this subject matter: U.S. Application No. 12/759,123, entitled "ACTIVE BUTLER AND BLASS MATRICES," which is being filed contemporaneously herewith (docket no. 36956.7100); U.S. Application No. 12/759,043, entitled "ACTIVE HYBRIDS FOR ANTENNA SYSTEMS," which is being filed contemporaneously herewith (docket no. 36956.7200); U.S. Application No. 12/759,064, entitled "ACTIVE FEED FORWARD AMPLIFIER," which is being filed contemporaneously herewith (docket no. 36956.7300); U.S. Application No. 12/759,059, entitled "MULTI-BEAM ACTIVE PHASED ARRAY ARCHITECTURE," which is being filed contemporaneously herewith (docket no. 36956.6500); U.S. Application No. 12/758,996, entitled "PRESELECTOR AMPLIFIER," which is being filed contemporaneously herewith (docket no. 36956.6800); U.S. Application No. 12/759,148, entitled "ACTIVE POWER SPLITTER," which is being filed contemporaneously herewith (docket no. 36956.8700); U.S. Application No. 12/759,112, entitled "HALF-DUPLEX PHASED ARRAY ANTENNA SYSTEM," which is being filed contemporaneously herewith (docket no. 55424.0500); U.S. Application No. 12/759,113, entitled "DIGITAL AMPLITUDE CONTROL OF ACTIVE VECTOR GENERATOR," which is being filed contemporaneously herewith (docket no. 36956.9000); the contents of which are hereby incorporated by reference for any purpose in their entirety.
Benefits, other advantages, and solutions to problems have been described above with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any element(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as critical, required, or essential features or elements of any or all the claims. As used herein, the terms "includes," "including," "comprises," "comprising," or any other variation thereof, are intended to cover a nonexclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Further, no element described herein is required for the practice of the invention unless expressly described as "essential" or "critical."
Claims
1. A phased array antenna in communication with a radiating element, the phased array antenna comprising: a 90° hybrid configured to receive dual linearly polarized RP signals from the radiating element, wherein the 90° hybrid is configured to inject a 90° phase shift and generate a RHCP intermediate signal and a LHCP intermediate signal, a first vector generator configured to receive the RHCP intermediate signal, wherein the first vector generator is configured to phase adjust the RCHP intermediate signal for beam steering and output a first RF signal; and a second vector generator configured to receive the LHCP intermediate signal, wherein the second vector generator is configured to phase adjust the LCHP intermediate signal for beam steering and output a second RF signal.
2. The phased array antenna of claim 1 , wherein the 90° hybrid is a 90° active hybrid.
3. The phased array antenna of claim 1 , wherein the 90° hybrid is a 90° passive hybrid, and wherein the 90° passive hybrid is one of a branchline hybrid and a Lange coupler.
4. A phased array antenna in communication with a radiating element, the phased array antenna comprising: a first vector generator configured to receive a first signal from the radiating element, wherein the first vector generator is configured to provide phase and amplitude adjustment of the first signal for polarization tracking and beam steering and output a first intermediate signal; a second vector generator configured to receive a second signal from the radiating element, wherein the second vector generator is configured to provide phase and amplitude adjustment of the second signal for polarization tracking and beam steering and output a second intermediate signal; and a hybrid configured to receive the first intermediate signal and the second intermediate signal and generate two RF output signals with a phase difference, wherein the two RF output signals are each a composite of the first intermediate signal and the second intermediate signal.
5. The phased array antenna of claim 4, wherein the hybrid is a 90° active hybrid configured to generate a 90° phase difference.
6. The phased array antenna of claim 4, wherein the hybrid is a 180° active hybrid configured to generate a 1 80° phase difference.
7. The phased array antenna of claim 4, wherein the hybrid is a 90° passive hybrid, and wherein the 90° passive hybrid is one of a branchline hybrid and a Lange coupler.
8. The phased array antenna of claim 4, wherein the hybrid is a 180° passive hybrid, and wherein the 180° passive hybrid is one of a magic tee and a ring hybrid.
9. A phased array antenna in communication with a radiating element, the phased array antenna comprising: a first vector generator configured to receive a first signal from the radiating element, wherein the first vector generator is configured to provide phase and amplitude adjustment of the first signal for polarization tracking and beam steering, and to output a first intermediate signal; a second vector generator configured to receive a second signal from the radiating element, wherein the second vector generator is configured to provide phase and amplitude adjustment of the second signal for polarization tracking and beam steering, and to output a second intermediate signal; and a combiner configured to receive the first intermediate signal and the second intermediate signal, wherein the first and second intermediate signals are combined in an RF output signal.
10. The phased array antenna of claim 9, wherein the combiner is an active combiner.
11. The phased array antenna of claim 9, wherein the combiner is a passive combiner, and wherein the passive combiner is a Wilkinson combiner.
12. A phased array antenna in communication with a radiating element, the phased array antenna comprising: a hybrid configured to receive dual linearly polarized RF signals from the radiating element, wherein the hybrid is configured to inject a phase shift and generate a RHCP intermediate signal and a LHCP intermediate signal; a first vector generator configured to receive the RHCP intermediate signal, wherein the first vector generator is configured to phase adjust the RCHP inteπnediate signal for beam steering and output a first RF intermediate signal; a second vector generator configured to receive the LHCP intermediate signal, wherein the second vector generator is configured to phase adjust the LCHP intermediate signal for beam steering and output a second RF intermediate signal, and a combiner configured to receive the first RF intermediate signal and the second RF intermediate signal, wherein the first and second RF intermediate signals are combined in an RF output signal.
13. The phased array antenna of claim 12, wherein the hybrid is a 90° active hybrid configured to inject a 90° phase shift.
14. The phased array antenna of claim 12, wherein the hybrid is a 180° active hybrid configured to inject a 180° phase shift.
15 The phased array antenna of claim 12, wherein the hybrid is either a 90° passive hybrid or a 180° passive hybrid.
16. The phased array antenna of claim 12, wherein the combiner is an active combiner.
17. The phased array antenna of claim 12, wherein the combiner is a passive combiner, wherein the passive combiner is a Wilkinson combiner.
18. A phased array antenna in communication with a radiating element, the phased array antenna comprising: a hybrid configured to receive dual linearly polarized RF signals from the radiating element, wherein the hybrid is configured to inject a phase shift and generate a RHCP intermediate signal and a LHCP intermediate signal; a first vector generator configured to receive the RHCP intermediate signal, wherein the first vector generator is configured to phase adjust the RCHP intermediate signal for beam steering and output a first RF intermediate signal; a second vector generator configured to receive the LHCP intermediate signal, wherein the second vector generator is configured to phase adjust the LCHP intermediate signal for beam steering and output a second RF intermediate signal; and an output hybrid configured to receive the first RF intermediate signal and the second RF intermediate signal and generate two RF output signals with a phase difference, wherein the two RF output signals are a composite of the first and second RF intermediate signals.
19. The phased array antenna of claim 18, wherein the hybrid is a 90° active hybrid or a 180° active hybrid.
20. The phased array antenna of claim 18, wherein the hybrid is either a 90° passive hybrid or a 180° passive hybrid.
21. The phased array antenna of claim 18, wherein the output hybrid is a 90° active hybrid or a 180° active hybrid.
22. The phased array antenna of claim 18, wherein the output hybrid is either a 90° passive hybrid or a 180° passive hybrid.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8837632B2 (en) | 2011-11-29 | 2014-09-16 | Viasat, Inc. | Vector generator using octant symmetry |
US9020069B2 (en) | 2011-11-29 | 2015-04-28 | Viasat, Inc. | Active general purpose hybrid |
US9094102B2 (en) | 2009-04-13 | 2015-07-28 | Viasat, Inc. | Half-duplex phased array antenna system |
US9425890B2 (en) | 2009-04-13 | 2016-08-23 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US10516219B2 (en) | 2009-04-13 | 2019-12-24 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
Families Citing this family (280)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0422529D0 (en) * | 2004-10-11 | 2004-11-10 | Invacom Ltd | Apparatus for selected provision of linear and/or circular polarity signals |
WO2008156800A1 (en) * | 2007-06-19 | 2008-12-24 | Parkervision, Inc. | Combiner-less multiple input single output (miso) amplification with blended control |
ATE505858T1 (en) | 2007-09-24 | 2011-04-15 | Panasonic Avionics Corp | ARRANGEMENT AND METHOD FOR RECEIVING BROADCAST CONTENT ON A MOBILE PLATFORM DURING TRAVEL |
US8917207B2 (en) * | 2007-10-16 | 2014-12-23 | Livetv, Llc | Aircraft in-flight entertainment system having a multi-beam phased array antenna and associated methods |
WO2010115468A1 (en) * | 2009-04-09 | 2010-10-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Filter for an indoor cellular system |
JP5603927B2 (en) * | 2009-04-13 | 2014-10-08 | ビアサット・インコーポレイテッド | Multi-beam active phased array architecture |
CA2708114C (en) * | 2009-06-18 | 2017-11-14 | Lin-ping SHEN | Butler matrix and beam forming antenna comprising same |
US9584199B2 (en) * | 2009-09-21 | 2017-02-28 | Kathrein-Werke Kg | User group specific beam forming in a mobile network |
US8977309B2 (en) * | 2009-09-21 | 2015-03-10 | Kathrein-Werke Kg | Antenna array, network planning system, communication network and method for relaying radio signals with independently configurable beam pattern shapes using a local knowledge |
WO2011056755A2 (en) * | 2009-11-03 | 2011-05-12 | Viasat, Inc. | Programmable rf array |
US9379438B1 (en) * | 2009-12-01 | 2016-06-28 | Viasat, Inc. | Fragmented aperture for the Ka/K/Ku frequency bands |
US8879995B2 (en) * | 2009-12-23 | 2014-11-04 | Viconics Electronics Inc. | Wireless power transmission using phased array antennae |
EP2534728A1 (en) * | 2010-02-08 | 2012-12-19 | Telefonaktiebolaget L M Ericsson (PUBL) | An antenna with adjustable beam characteristics |
US20130059553A1 (en) * | 2010-05-21 | 2013-03-07 | Nec Corporation | Antenna apparatus, antenna system, and method of adjusting antenna apparatus |
US8862050B2 (en) * | 2010-07-30 | 2014-10-14 | Spatial Digital Systems, Inc. | Polarization diversity with portable devices via wavefront muxing techniques |
US8699784B2 (en) * | 2010-08-10 | 2014-04-15 | Camtek Ltd. | Inspection recipe generation and inspection based on an inspection recipe |
US20120105205A1 (en) * | 2010-10-29 | 2012-05-03 | Ncr Corporation | Item checkout device with weigh plate antenna |
US9112551B2 (en) * | 2010-11-15 | 2015-08-18 | Telefonaktiebolaget L M Ericsson (Publ) | Antenna architecture for maintaining beam shape in a reconfigurable antenna |
FR2970817B1 (en) | 2011-01-24 | 2013-11-15 | St Microelectronics Sa | RADIOFREQUENCY SEPARATOR |
FR2970816B1 (en) * | 2011-01-24 | 2013-11-15 | St Microelectronics Sa | RADIOFREQUENCY COMBINER |
KR20120086201A (en) * | 2011-01-25 | 2012-08-02 | 한국전자통신연구원 | Dual Polarization Antenna And Method For Transmitting And Receiving Signal Thereof |
CN102647213B (en) * | 2011-02-21 | 2015-03-11 | 华为技术有限公司 | Wireless communication system and method |
WO2012118874A2 (en) * | 2011-03-03 | 2012-09-07 | Thomson Licensing | Apparatus and method for processing a radio frequency signal |
US20140225805A1 (en) * | 2011-03-15 | 2014-08-14 | Helen K. Pan | Conformal phased array antenna with integrated transceiver |
US9013360B1 (en) | 2011-05-13 | 2015-04-21 | AMI Research & Development, LLC | Continuous band antenna (CBA) with switchable quadrant beams and selectable polarization |
US8970427B2 (en) | 2011-05-18 | 2015-03-03 | Mediatek Singapore Pte. Ltd. | Phase-arrayed device and method for calibrating the phase-arrayed device |
US20120294338A1 (en) | 2011-05-18 | 2012-11-22 | Jing-Hong Conan Zhan | Phase-arrayed transceiver |
US9431702B2 (en) * | 2011-05-24 | 2016-08-30 | Xirrus, Inc. | MIMO antenna system having beamforming networks |
KR101800221B1 (en) * | 2011-08-11 | 2017-11-22 | 삼성전자주식회사 | Method and apparatus for beam tracking in wireless communication system |
US9124361B2 (en) | 2011-10-06 | 2015-09-01 | Raytheon Company | Scalable, analog monopulse network |
US9490886B2 (en) * | 2012-02-27 | 2016-11-08 | Qualcomm Incorporated | RF beamforming in phased array application |
US9316723B2 (en) | 2012-05-24 | 2016-04-19 | Raytheon Company | Differential high power amplifier for a low profile, wide band transmit array |
BR112014030940B1 (en) | 2012-06-11 | 2022-09-06 | UCB Biopharma SRL | BENZIMIDAZOLS THAT MODULATE TNF-ALFA AND PHARMACEUTICAL COMPOSITION COMPRISING THE SAME |
TWI467973B (en) * | 2012-06-19 | 2015-01-01 | Univ Nat Cheng Kung | Rf multi-modal signal splitter device |
KR102062158B1 (en) | 2012-06-21 | 2020-01-03 | 삼성전자주식회사 | Communication device and orientation control method |
US10534189B2 (en) * | 2012-11-27 | 2020-01-14 | The Board Of Trustees Of The Leland Stanford Junior University | Universal linear components |
RU2525120C2 (en) * | 2012-11-30 | 2014-08-10 | Открытое акционерное общество "Омский научно-исследовательский институт приборостроения" (ОАО "ОНИИП") | Multichannel filtration unit |
EP2738870B1 (en) * | 2012-12-03 | 2021-06-02 | ViaSat Inc. | Multi-beam active phased array architecture with independent polarization control |
US10009065B2 (en) | 2012-12-05 | 2018-06-26 | At&T Intellectual Property I, L.P. | Backhaul link for distributed antenna system |
US9113347B2 (en) | 2012-12-05 | 2015-08-18 | At&T Intellectual Property I, Lp | Backhaul link for distributed antenna system |
US9160064B2 (en) * | 2012-12-28 | 2015-10-13 | Kopin Corporation | Spatially diverse antennas for a headset computer |
WO2014142885A1 (en) * | 2013-03-14 | 2014-09-18 | Viasat, Inc. | Wideband true time delay circuits for antenna architectures |
CA2841685C (en) | 2013-03-15 | 2021-05-18 | Panasonic Avionics Corporation | System and method for providing multi-mode wireless data distribution |
US9042809B2 (en) * | 2013-03-19 | 2015-05-26 | Delphi Technologies, Inc. | Satellite communication having distinct low priority information broadcast into adjacent sub-regions |
US10031210B2 (en) * | 2013-03-21 | 2018-07-24 | Nxp Usa, Inc. | Radar device and method of operating a radar device |
US9999038B2 (en) | 2013-05-31 | 2018-06-12 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9525524B2 (en) | 2013-05-31 | 2016-12-20 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9350444B2 (en) * | 2013-08-22 | 2016-05-24 | Broadcom Corporation | Wireless communication device with switched polarization and methods for use therewith |
US9806422B2 (en) | 2013-09-11 | 2017-10-31 | International Business Machines Corporation | Antenna-in-package structures with broadside and end-fire radiations |
US9819098B2 (en) | 2013-09-11 | 2017-11-14 | International Business Machines Corporation | Antenna-in-package structures with broadside and end-fire radiations |
JP2015076708A (en) * | 2013-10-08 | 2015-04-20 | 住友電気工業株式会社 | Amplification circuit |
US8897697B1 (en) | 2013-11-06 | 2014-11-25 | At&T Intellectual Property I, Lp | Millimeter-wave surface-wave communications |
US9209902B2 (en) | 2013-12-10 | 2015-12-08 | At&T Intellectual Property I, L.P. | Quasi-optical coupler |
US9543662B2 (en) * | 2014-03-06 | 2017-01-10 | Raytheon Company | Electronic Rotman lens |
US10073812B2 (en) | 2014-04-25 | 2018-09-11 | The University Of North Carolina At Charlotte | Digital discrete-time non-foster circuits and elements |
CN104022743A (en) * | 2014-05-30 | 2014-09-03 | 桐城运城制版有限公司 | Multiband variable-frequency power amplifier |
US9653820B1 (en) | 2014-06-09 | 2017-05-16 | Rockwell Collins, Inc. | Active manifold system and method for an array antenna |
US9923269B1 (en) * | 2015-06-30 | 2018-03-20 | Rockwell Collins, Inc. | Phase position verification system and method for an array antenna |
US9735469B1 (en) | 2014-06-09 | 2017-08-15 | Rockwell Collins, Inc. | Integrated time delay unit system and method for a feed manifold |
US9673846B2 (en) | 2014-06-06 | 2017-06-06 | Rockwell Collins, Inc. | Temperature compensation system and method for an array antenna system |
US9692101B2 (en) | 2014-08-26 | 2017-06-27 | At&T Intellectual Property I, L.P. | Guided wave couplers for coupling electromagnetic waves between a waveguide surface and a surface of a wire |
US9768833B2 (en) | 2014-09-15 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves |
US10063280B2 (en) | 2014-09-17 | 2018-08-28 | At&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
US9628854B2 (en) | 2014-09-29 | 2017-04-18 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing content in a communication network |
US9615269B2 (en) | 2014-10-02 | 2017-04-04 | At&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
US9685992B2 (en) | 2014-10-03 | 2017-06-20 | At&T Intellectual Property I, L.P. | Circuit panel network and methods thereof |
US9503189B2 (en) | 2014-10-10 | 2016-11-22 | At&T Intellectual Property I, L.P. | Method and apparatus for arranging communication sessions in a communication system |
US9973299B2 (en) | 2014-10-14 | 2018-05-15 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
US9762289B2 (en) | 2014-10-14 | 2017-09-12 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting or receiving signals in a transportation system |
US9520945B2 (en) | 2014-10-21 | 2016-12-13 | At&T Intellectual Property I, L.P. | Apparatus for providing communication services and methods thereof |
US9312919B1 (en) | 2014-10-21 | 2016-04-12 | At&T Intellectual Property I, Lp | Transmission device with impairment compensation and methods for use therewith |
US9653770B2 (en) | 2014-10-21 | 2017-05-16 | At&T Intellectual Property I, L.P. | Guided wave coupler, coupling module and methods for use therewith |
US9769020B2 (en) | 2014-10-21 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for responding to events affecting communications in a communication network |
US9564947B2 (en) | 2014-10-21 | 2017-02-07 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with diversity and methods for use therewith |
US9627768B2 (en) | 2014-10-21 | 2017-04-18 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9577306B2 (en) | 2014-10-21 | 2017-02-21 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9780834B2 (en) | 2014-10-21 | 2017-10-03 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting electromagnetic waves |
US9461706B1 (en) | 2015-07-31 | 2016-10-04 | At&T Intellectual Property I, Lp | Method and apparatus for exchanging communication signals |
US9654173B2 (en) | 2014-11-20 | 2017-05-16 | At&T Intellectual Property I, L.P. | Apparatus for powering a communication device and methods thereof |
US9544006B2 (en) | 2014-11-20 | 2017-01-10 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US9954287B2 (en) | 2014-11-20 | 2018-04-24 | At&T Intellectual Property I, L.P. | Apparatus for converting wireless signals and electromagnetic waves and methods thereof |
US9680670B2 (en) | 2014-11-20 | 2017-06-13 | At&T Intellectual Property I, L.P. | Transmission device with channel equalization and control and methods for use therewith |
US10340573B2 (en) | 2016-10-26 | 2019-07-02 | At&T Intellectual Property I, L.P. | Launcher with cylindrical coupling device and methods for use therewith |
US9997819B2 (en) | 2015-06-09 | 2018-06-12 | At&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
US9742462B2 (en) | 2014-12-04 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission medium and communication interfaces and methods for use therewith |
US9800327B2 (en) | 2014-11-20 | 2017-10-24 | At&T Intellectual Property I, L.P. | Apparatus for controlling operations of a communication device and methods thereof |
US10243784B2 (en) | 2014-11-20 | 2019-03-26 | At&T Intellectual Property I, L.P. | System for generating topology information and methods thereof |
US10009067B2 (en) | 2014-12-04 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for configuring a communication interface |
US10170833B1 (en) * | 2014-12-19 | 2019-01-01 | L-3 Communications Corp. | Electronically controlled polarization and beam steering |
US10263329B1 (en) * | 2015-01-12 | 2019-04-16 | Raytheon Company | Dynamic azimuth scanning for rotating active electronic scanned array radar |
US10144036B2 (en) | 2015-01-30 | 2018-12-04 | At&T Intellectual Property I, L.P. | Method and apparatus for mitigating interference affecting a propagation of electromagnetic waves guided by a transmission medium |
US9876570B2 (en) | 2015-02-20 | 2018-01-23 | At&T Intellectual Property I, Lp | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9848370B1 (en) * | 2015-03-16 | 2017-12-19 | Rkf Engineering Solutions Llc | Satellite beamforming |
US9749013B2 (en) | 2015-03-17 | 2017-08-29 | At&T Intellectual Property I, L.P. | Method and apparatus for reducing attenuation of electromagnetic waves guided by a transmission medium |
US10187141B2 (en) | 2015-04-10 | 2019-01-22 | Viasat, Inc. | Cross-band system for end-to-end beamforming |
US10128939B2 (en) | 2015-04-10 | 2018-11-13 | Viasat, Inc. | Beamformer for end-to-end beamforming communications system |
PE20220729A1 (en) | 2015-04-10 | 2022-05-04 | Viasat Inc | END-TO-END BEAMFORMING SYSTEMS |
US10224981B2 (en) | 2015-04-24 | 2019-03-05 | At&T Intellectual Property I, Lp | Passive electrical coupling device and methods for use therewith |
US9705561B2 (en) | 2015-04-24 | 2017-07-11 | At&T Intellectual Property I, L.P. | Directional coupling device and methods for use therewith |
US9793954B2 (en) | 2015-04-28 | 2017-10-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device and methods for use therewith |
US9948354B2 (en) | 2015-04-28 | 2018-04-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device with reflective plate and methods for use therewith |
CN104767501B (en) * | 2015-05-06 | 2017-09-29 | 中国科学技术大学 | A kind of 6 360 ° of active phase shifters applied based on ultrahigh frequency RFID |
US9871282B2 (en) | 2015-05-14 | 2018-01-16 | At&T Intellectual Property I, L.P. | At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric |
US9490869B1 (en) | 2015-05-14 | 2016-11-08 | At&T Intellectual Property I, L.P. | Transmission medium having multiple cores and methods for use therewith |
US9748626B2 (en) | 2015-05-14 | 2017-08-29 | At&T Intellectual Property I, L.P. | Plurality of cables having different cross-sectional shapes which are bundled together to form a transmission medium |
US10650940B2 (en) | 2015-05-15 | 2020-05-12 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US10679767B2 (en) | 2015-05-15 | 2020-06-09 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US9917341B2 (en) | 2015-05-27 | 2018-03-13 | At&T Intellectual Property I, L.P. | Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves |
US10812174B2 (en) | 2015-06-03 | 2020-10-20 | At&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
US10348391B2 (en) | 2015-06-03 | 2019-07-09 | At&T Intellectual Property I, L.P. | Client node device with frequency conversion and methods for use therewith |
US10154493B2 (en) | 2015-06-03 | 2018-12-11 | At&T Intellectual Property I, L.P. | Network termination and methods for use therewith |
US9866309B2 (en) | 2015-06-03 | 2018-01-09 | At&T Intellectual Property I, Lp | Host node device and methods for use therewith |
US10103801B2 (en) | 2015-06-03 | 2018-10-16 | At&T Intellectual Property I, L.P. | Host node device and methods for use therewith |
US9912381B2 (en) | 2015-06-03 | 2018-03-06 | At&T Intellectual Property I, Lp | Network termination and methods for use therewith |
US9913139B2 (en) | 2015-06-09 | 2018-03-06 | At&T Intellectual Property I, L.P. | Signal fingerprinting for authentication of communicating devices |
US9608692B2 (en) | 2015-06-11 | 2017-03-28 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
US10142086B2 (en) | 2015-06-11 | 2018-11-27 | At&T Intellectual Property I, L.P. | Repeater and methods for use therewith |
US9820146B2 (en) | 2015-06-12 | 2017-11-14 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9667317B2 (en) | 2015-06-15 | 2017-05-30 | At&T Intellectual Property I, L.P. | Method and apparatus for providing security using network traffic adjustments |
US9509415B1 (en) | 2015-06-25 | 2016-11-29 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
US9640850B2 (en) | 2015-06-25 | 2017-05-02 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
US9865911B2 (en) | 2015-06-25 | 2018-01-09 | At&T Intellectual Property I, L.P. | Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium |
US9836957B2 (en) | 2015-07-14 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating with premises equipment |
US10033108B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave having a wave mode that mitigates interference |
US10205655B2 (en) | 2015-07-14 | 2019-02-12 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array and multiple communication paths |
US10033107B2 (en) | 2015-07-14 | 2018-07-24 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US9882257B2 (en) | 2015-07-14 | 2018-01-30 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US10044409B2 (en) | 2015-07-14 | 2018-08-07 | At&T Intellectual Property I, L.P. | Transmission medium and methods for use therewith |
US10320586B2 (en) | 2015-07-14 | 2019-06-11 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an insulated transmission medium |
US10341142B2 (en) | 2015-07-14 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an uninsulated conductor |
US9722318B2 (en) | 2015-07-14 | 2017-08-01 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US10170840B2 (en) | 2015-07-14 | 2019-01-01 | At&T Intellectual Property I, L.P. | Apparatus and methods for sending or receiving electromagnetic signals |
US9847566B2 (en) | 2015-07-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a field of a signal to mitigate interference |
US9628116B2 (en) | 2015-07-14 | 2017-04-18 | At&T Intellectual Property I, L.P. | Apparatus and methods for transmitting wireless signals |
US9853342B2 (en) | 2015-07-14 | 2017-12-26 | At&T Intellectual Property I, L.P. | Dielectric transmission medium connector and methods for use therewith |
US10148016B2 (en) | 2015-07-14 | 2018-12-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array |
US9608740B2 (en) | 2015-07-15 | 2017-03-28 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9793951B2 (en) | 2015-07-15 | 2017-10-17 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US10090606B2 (en) | 2015-07-15 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system with dielectric array and methods for use therewith |
US10784670B2 (en) | 2015-07-23 | 2020-09-22 | At&T Intellectual Property I, L.P. | Antenna support for aligning an antenna |
US9871283B2 (en) | 2015-07-23 | 2018-01-16 | At&T Intellectual Property I, Lp | Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration |
US9948333B2 (en) | 2015-07-23 | 2018-04-17 | At&T Intellectual Property I, L.P. | Method and apparatus for wireless communications to mitigate interference |
US9749053B2 (en) | 2015-07-23 | 2017-08-29 | At&T Intellectual Property I, L.P. | Node device, repeater and methods for use therewith |
US9912027B2 (en) | 2015-07-23 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US9967173B2 (en) | 2015-07-31 | 2018-05-08 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US10020587B2 (en) | 2015-07-31 | 2018-07-10 | At&T Intellectual Property I, L.P. | Radial antenna and methods for use therewith |
US9735833B2 (en) | 2015-07-31 | 2017-08-15 | At&T Intellectual Property I, L.P. | Method and apparatus for communications management in a neighborhood network |
US9904535B2 (en) | 2015-09-14 | 2018-02-27 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing software |
US10051629B2 (en) | 2015-09-16 | 2018-08-14 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an in-band reference signal |
US10009063B2 (en) | 2015-09-16 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an out-of-band reference signal |
US10136434B2 (en) | 2015-09-16 | 2018-11-20 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having an ultra-wideband control channel |
US10079661B2 (en) | 2015-09-16 | 2018-09-18 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a clock reference |
US10009901B2 (en) | 2015-09-16 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method, apparatus, and computer-readable storage medium for managing utilization of wireless resources between base stations |
US9705571B2 (en) | 2015-09-16 | 2017-07-11 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system |
WO2017078851A2 (en) | 2015-09-18 | 2017-05-11 | Corman David W | Laminar phased array |
US9769128B2 (en) | 2015-09-28 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for encryption of communications over a network |
US9729197B2 (en) | 2015-10-01 | 2017-08-08 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating network management traffic over a network |
US10074890B2 (en) | 2015-10-02 | 2018-09-11 | At&T Intellectual Property I, L.P. | Communication device and antenna with integrated light assembly |
US9882277B2 (en) | 2015-10-02 | 2018-01-30 | At&T Intellectual Property I, Lp | Communication device and antenna assembly with actuated gimbal mount |
US9876264B2 (en) | 2015-10-02 | 2018-01-23 | At&T Intellectual Property I, Lp | Communication system, guided wave switch and methods for use therewith |
US10665942B2 (en) | 2015-10-16 | 2020-05-26 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting wireless communications |
US10051483B2 (en) | 2015-10-16 | 2018-08-14 | At&T Intellectual Property I, L.P. | Method and apparatus for directing wireless signals |
US10355367B2 (en) | 2015-10-16 | 2019-07-16 | At&T Intellectual Property I, L.P. | Antenna structure for exchanging wireless signals |
US9979447B2 (en) * | 2016-01-04 | 2018-05-22 | Futurewei Technologies, Inc. | Radio frequency distribution network for a split beam user specific tilt antenna |
US10700444B2 (en) * | 2016-07-06 | 2020-06-30 | Industrial Technology Research Institute | Multi-beam phased antenna structure and controlling method thereof |
US9923712B2 (en) * | 2016-08-01 | 2018-03-20 | Movandi Corporation | Wireless receiver with axial ratio and cross-polarization calibration |
US10323943B2 (en) * | 2016-08-01 | 2019-06-18 | Movandi Corporation | Wireless receiver with tracking using location, heading, and motion sensors and adaptive power detection |
US9912419B1 (en) | 2016-08-24 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for managing a fault in a distributed antenna system |
US9860075B1 (en) | 2016-08-26 | 2018-01-02 | At&T Intellectual Property I, L.P. | Method and communication node for broadband distribution |
US10291296B2 (en) | 2016-09-02 | 2019-05-14 | Movandi Corporation | Transceiver for multi-beam and relay with 5G application |
US10291311B2 (en) | 2016-09-09 | 2019-05-14 | At&T Intellectual Property I, L.P. | Method and apparatus for mitigating a fault in a distributed antenna system |
US11032819B2 (en) | 2016-09-15 | 2021-06-08 | At&T Intellectual Property I, L.P. | Method and apparatus for use with a radio distributed antenna system having a control channel reference signal |
US10340600B2 (en) | 2016-10-18 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via plural waveguide systems |
US10135146B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via circuits |
US10135147B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via an antenna |
PL3529917T3 (en) * | 2016-10-21 | 2021-06-14 | Viasat, Inc. | Ground-based beamformed communications using mutually synchronized spatially multiplexed feeder links |
US9876605B1 (en) | 2016-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Launcher and coupling system to support desired guided wave mode |
US10374316B2 (en) | 2016-10-21 | 2019-08-06 | At&T Intellectual Property I, L.P. | System and dielectric antenna with non-uniform dielectric |
US10811767B2 (en) | 2016-10-21 | 2020-10-20 | At&T Intellectual Property I, L.P. | System and dielectric antenna with convex dielectric radome |
US9991580B2 (en) | 2016-10-21 | 2018-06-05 | At&T Intellectual Property I, L.P. | Launcher and coupling system for guided wave mode cancellation |
US10312567B2 (en) | 2016-10-26 | 2019-06-04 | At&T Intellectual Property I, L.P. | Launcher with planar strip antenna and methods for use therewith |
US10225025B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Method and apparatus for detecting a fault in a communication system |
US10498044B2 (en) | 2016-11-03 | 2019-12-03 | At&T Intellectual Property I, L.P. | Apparatus for configuring a surface of an antenna |
US10291334B2 (en) | 2016-11-03 | 2019-05-14 | At&T Intellectual Property I, L.P. | System for detecting a fault in a communication system |
US10224634B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Methods and apparatus for adjusting an operational characteristic of an antenna |
US10199717B2 (en) | 2016-11-18 | 2019-02-05 | Movandi Corporation | Phased array antenna panel having reduced passive loss of received signals |
US10535928B2 (en) | 2016-11-23 | 2020-01-14 | At&T Intellectual Property I, L.P. | Antenna system and methods for use therewith |
US10178445B2 (en) | 2016-11-23 | 2019-01-08 | At&T Intellectual Property I, L.P. | Methods, devices, and systems for load balancing between a plurality of waveguides |
US10340601B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Multi-antenna system and methods for use therewith |
US10340603B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Antenna system having shielded structural configurations for assembly |
US10090594B2 (en) | 2016-11-23 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system having structural configurations for assembly |
US10361489B2 (en) | 2016-12-01 | 2019-07-23 | At&T Intellectual Property I, L.P. | Dielectric dish antenna system and methods for use therewith |
US10305190B2 (en) | 2016-12-01 | 2019-05-28 | At&T Intellectual Property I, L.P. | Reflecting dielectric antenna system and methods for use therewith |
US10382976B2 (en) | 2016-12-06 | 2019-08-13 | At&T Intellectual Property I, L.P. | Method and apparatus for managing wireless communications based on communication paths and network device positions |
US10755542B2 (en) | 2016-12-06 | 2020-08-25 | At&T Intellectual Property I, L.P. | Method and apparatus for surveillance via guided wave communication |
US10819035B2 (en) | 2016-12-06 | 2020-10-27 | At&T Intellectual Property I, L.P. | Launcher with helical antenna and methods for use therewith |
US9927517B1 (en) | 2016-12-06 | 2018-03-27 | At&T Intellectual Property I, L.P. | Apparatus and methods for sensing rainfall |
US10637149B2 (en) | 2016-12-06 | 2020-04-28 | At&T Intellectual Property I, L.P. | Injection molded dielectric antenna and methods for use therewith |
US10439675B2 (en) | 2016-12-06 | 2019-10-08 | At&T Intellectual Property I, L.P. | Method and apparatus for repeating guided wave communication signals |
US10135145B2 (en) | 2016-12-06 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave along a transmission medium |
US10326494B2 (en) | 2016-12-06 | 2019-06-18 | At&T Intellectual Property I, L.P. | Apparatus for measurement de-embedding and methods for use therewith |
US10020844B2 (en) | 2016-12-06 | 2018-07-10 | T&T Intellectual Property I, L.P. | Method and apparatus for broadcast communication via guided waves |
US10727599B2 (en) | 2016-12-06 | 2020-07-28 | At&T Intellectual Property I, L.P. | Launcher with slot antenna and methods for use therewith |
US10694379B2 (en) | 2016-12-06 | 2020-06-23 | At&T Intellectual Property I, L.P. | Waveguide system with device-based authentication and methods for use therewith |
US10139820B2 (en) | 2016-12-07 | 2018-11-27 | At&T Intellectual Property I, L.P. | Method and apparatus for deploying equipment of a communication system |
US10359749B2 (en) | 2016-12-07 | 2019-07-23 | At&T Intellectual Property I, L.P. | Method and apparatus for utilities management via guided wave communication |
US10243270B2 (en) | 2016-12-07 | 2019-03-26 | At&T Intellectual Property I, L.P. | Beam adaptive multi-feed dielectric antenna system and methods for use therewith |
US10446936B2 (en) | 2016-12-07 | 2019-10-15 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system and methods for use therewith |
US10027397B2 (en) | 2016-12-07 | 2018-07-17 | At&T Intellectual Property I, L.P. | Distributed antenna system and methods for use therewith |
US9893795B1 (en) | 2016-12-07 | 2018-02-13 | At&T Intellectual Property I, Lp | Method and repeater for broadband distribution |
US10389029B2 (en) | 2016-12-07 | 2019-08-20 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system with core selection and methods for use therewith |
US10547348B2 (en) | 2016-12-07 | 2020-01-28 | At&T Intellectual Property I, L.P. | Method and apparatus for switching transmission mediums in a communication system |
US10168695B2 (en) | 2016-12-07 | 2019-01-01 | At&T Intellectual Property I, L.P. | Method and apparatus for controlling an unmanned aircraft |
US10530505B2 (en) | 2016-12-08 | 2020-01-07 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves along a transmission medium |
US10916969B2 (en) | 2016-12-08 | 2021-02-09 | At&T Intellectual Property I, L.P. | Method and apparatus for providing power using an inductive coupling |
US10411356B2 (en) | 2016-12-08 | 2019-09-10 | At&T Intellectual Property I, L.P. | Apparatus and methods for selectively targeting communication devices with an antenna array |
US10601494B2 (en) | 2016-12-08 | 2020-03-24 | At&T Intellectual Property I, L.P. | Dual-band communication device and method for use therewith |
US9998870B1 (en) | 2016-12-08 | 2018-06-12 | At&T Intellectual Property I, L.P. | Method and apparatus for proximity sensing |
US10103422B2 (en) | 2016-12-08 | 2018-10-16 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10777873B2 (en) | 2016-12-08 | 2020-09-15 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10389037B2 (en) | 2016-12-08 | 2019-08-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for selecting sections of an antenna array and use therewith |
US9911020B1 (en) | 2016-12-08 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for tracking via a radio frequency identification device |
US10938108B2 (en) | 2016-12-08 | 2021-03-02 | At&T Intellectual Property I, L.P. | Frequency selective multi-feed dielectric antenna system and methods for use therewith |
US10069535B2 (en) | 2016-12-08 | 2018-09-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves having a certain electric field structure |
US10326689B2 (en) | 2016-12-08 | 2019-06-18 | At&T Intellectual Property I, L.P. | Method and system for providing alternative communication paths |
US9838896B1 (en) | 2016-12-09 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for assessing network coverage |
US10264586B2 (en) | 2016-12-09 | 2019-04-16 | At&T Mobility Ii Llc | Cloud-based packet controller and methods for use therewith |
US10340983B2 (en) | 2016-12-09 | 2019-07-02 | At&T Intellectual Property I, L.P. | Method and apparatus for surveying remote sites via guided wave communications |
US9973940B1 (en) | 2017-02-27 | 2018-05-15 | At&T Intellectual Property I, L.P. | Apparatus and methods for dynamic impedance matching of a guided wave launcher |
JP6991228B2 (en) | 2017-03-02 | 2022-01-12 | ヴィアサット,インコーポレイテッド | Dynamic satellite beam assignment |
US10298293B2 (en) | 2017-03-13 | 2019-05-21 | At&T Intellectual Property I, L.P. | Apparatus of communication utilizing wireless network devices |
US10379198B2 (en) | 2017-04-06 | 2019-08-13 | International Business Machines Corporation | Determining positions of transducers for receiving and/or transmitting wave signals |
TWI633712B (en) | 2017-05-16 | 2018-08-21 | 財團法人工業技術研究院 | Three-dimension butler matrix |
US10484078B2 (en) | 2017-07-11 | 2019-11-19 | Movandi Corporation | Reconfigurable and modular active repeater device |
US10263690B2 (en) | 2017-08-01 | 2019-04-16 | Viasat, Inc. | Handover based on predicted network conditions |
KR101865612B1 (en) * | 2017-09-05 | 2018-06-11 | 한국과학기술원 | Variable gain phase shifter |
KR101869241B1 (en) * | 2017-09-05 | 2018-06-21 | 한국과학기술원 | Gain variable phase shifter |
US10848130B2 (en) | 2017-09-05 | 2020-11-24 | Korea Advanced Institute Of Science And Technology | Variable gain phase shifter |
US11171418B2 (en) * | 2017-09-18 | 2021-11-09 | Integrated Device Technology, Inc. | Method to utilize bias current control in vertical or horizontal channels for polarization rotation with less power consumption |
WO2019126826A1 (en) | 2017-12-24 | 2019-06-27 | Anokiwave, Inc. | Beamforming integrated circuit, aesa system and method |
US10193512B1 (en) * | 2018-01-05 | 2019-01-29 | Werlatone, Inc. | Phase-shifting power divider/combiner assemblies and systems |
US10777894B2 (en) | 2018-02-15 | 2020-09-15 | The Mitre Corporation | Mechanically reconfigurable patch antenna |
CN111819731B (en) | 2018-03-05 | 2022-06-24 | 康普技术有限责任公司 | Multiband base station antenna |
US10998640B2 (en) | 2018-05-15 | 2021-05-04 | Anokiwave, Inc. | Cross-polarized time division duplexed antenna |
US10972191B2 (en) * | 2018-05-22 | 2021-04-06 | Asia Satellite Telecommunications Company Limited | Uplink interference geolocation method and system for high throughput satellite |
US11121465B2 (en) * | 2018-06-08 | 2021-09-14 | Sierra Nevada Corporation | Steerable beam antenna with controllably variable polarization |
EP3825717A4 (en) | 2018-07-20 | 2022-07-20 | Kyocera Corporation | Electronic device, electronic device control method, and electronic device control program |
US10432308B1 (en) * | 2018-08-23 | 2019-10-01 | Space Systems/Loral, Llc | Satellite system using an RF GBBF feeder uplink beam from a gateway to a satellite, and using an optical ISL from the satellite to another satellite |
US11336237B2 (en) * | 2018-09-24 | 2022-05-17 | Metawave Corporation | Vector modulator for millimeter wave applications |
US11219140B2 (en) * | 2018-10-04 | 2022-01-04 | Andrew Wireless Systems Gmbh | Flexible heat pipe cooled assembly |
CN109286080B (en) * | 2018-10-23 | 2021-01-12 | 北京无线电测量研究所 | Polarization device |
US11542040B1 (en) * | 2018-11-06 | 2023-01-03 | Meta Platforms, Inc. | Low earth orbit satellite communication system employing beam-hopping |
US11228116B1 (en) * | 2018-11-06 | 2022-01-18 | Lockhead Martin Corporation | Multi-band circularly polarized waveguide feed network |
US10931033B2 (en) * | 2019-01-23 | 2021-02-23 | Qorvo Us, Inc. | Multi-polarization millimeter wave (mmWave) transmitter/receiver architecture with shared power amplifiers |
US11171682B2 (en) * | 2019-01-30 | 2021-11-09 | Swiftlink Technologies Inc. | Dual polarization millimeter-wave frontend integrated circuit |
TWI696345B (en) * | 2019-03-11 | 2020-06-11 | 立積電子股份有限公司 | Signal processing device |
CN111710961B (en) * | 2019-03-18 | 2023-03-17 | Oppo广东移动通信有限公司 | Millimeter wave antenna module and electronic equipment |
US11057011B2 (en) | 2019-04-05 | 2021-07-06 | Semiconductor Components Industries, Llc | Amplifiers suitable for mm-wave signal splitting and combining |
RU2729889C1 (en) * | 2019-05-29 | 2020-08-13 | Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации | Antenna system and method of operation thereof |
US11545950B2 (en) | 2019-06-03 | 2023-01-03 | Analog Devices, Inc. | Apparatus and methods for vector modulator phase shifters |
CN112152696B (en) * | 2019-06-29 | 2022-10-28 | 亚洲卫星有限公司 | Uplink interference geographic positioning method and system for high-throughput satellite |
US11171416B2 (en) * | 2019-07-31 | 2021-11-09 | Honeywell International Inc. | Multi-element antenna array with integral comparison circuit for phase and amplitude calibration |
WO2021038965A1 (en) * | 2019-08-27 | 2021-03-04 | 株式会社村田製作所 | Antenna module and communication device equipped with same |
CN110646784B (en) * | 2019-09-29 | 2021-07-30 | 航天南湖电子信息技术股份有限公司 | DAC-based radar digital T/R component transmission waveform generation method |
EP4046240A4 (en) * | 2019-10-18 | 2023-11-29 | Galtronics USA, Inc. | Mitigating beam squint in multi-beam forming networks |
US11950585B2 (en) | 2020-01-09 | 2024-04-09 | International Business Machines Corporation | Imaging with wireless communication signals |
US11088463B1 (en) * | 2020-01-29 | 2021-08-10 | Thinkom Solutions, Inc. | Realization and application of simultaneous circular polarization in switchable single polarization systems |
CN111864385B (en) * | 2020-08-28 | 2021-03-23 | 西安电子科技大学 | Dual-beam dual-circular polarization resonant cavity antenna based on super surface |
US11929556B2 (en) * | 2020-09-08 | 2024-03-12 | Raytheon Company | Multi-beam passively-switched patch antenna array |
CN112072310B (en) * | 2020-09-18 | 2024-09-06 | 成都天锐星通科技有限公司 | Phased array antenna, antenna control method and communication equipment |
CN112290223B (en) * | 2020-09-27 | 2021-06-18 | 南京大学 | Polarization programmable super-structure surface and broadband dynamic beam regulation and control method |
IT202000023230A1 (en) * | 2020-10-01 | 2022-04-01 | Teko Telecom S R L | RECONFIGURABLE BEAMFORMER, PARTICULARLY FOR 5G NR |
US11715875B2 (en) | 2020-11-06 | 2023-08-01 | Electronics And Telecommunications Research Institute | Individual rotating radiating element and array antenna using the same |
US11916641B2 (en) | 2021-04-14 | 2024-02-27 | Samsung Electronics Co., Ltd. | Method of synchronizing the H and V phase in a dual-polarized phased array system |
US11714330B2 (en) | 2021-04-30 | 2023-08-01 | The Regents Of The University Of Michigan | Phase-combining waveguide doubler for optical phased array in solid-state lidar applications |
US11894619B2 (en) | 2021-07-23 | 2024-02-06 | Raytheon Company | Passive vector modulator |
CN113922839B (en) * | 2021-12-14 | 2022-03-01 | 成都雷电微力科技股份有限公司 | Transmit-receive unit, transmit-receive assembly and phased array antenna structure |
US11689393B1 (en) * | 2022-01-27 | 2023-06-27 | The Boeing Company | Near-zero latency analog bi-quad infinite impulse response filter |
CN116526098B (en) * | 2023-05-08 | 2024-02-23 | 宁波华瓷通信技术股份有限公司 | Multi-frequency combiner |
US12040558B1 (en) * | 2023-06-02 | 2024-07-16 | The Florida International University Board Of Trustees | Ultrawideband beamforming networks |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3119965A (en) * | 1960-08-08 | 1964-01-28 | Electronic Communications | System for splitting ultra-high-frequency power for divided transmission |
US4994773A (en) * | 1988-10-13 | 1991-02-19 | Chen Tzu H | Digitally controlled monolithic active phase shifter apparatus having a cascode configuration |
EP0762660A2 (en) * | 1995-08-08 | 1997-03-12 | AT&T IPM Corp. | Apparatus and method for electronic polarization correction |
WO2003036756A2 (en) * | 2001-10-22 | 2003-05-01 | Qinetiq Limited | Antenna system |
US20030162566A1 (en) * | 2000-05-05 | 2003-08-28 | Joseph Shapira | System and method for improving polarization matching on a cellular communication forward link |
Family Cites Families (117)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3842362A (en) * | 1972-12-20 | 1974-10-15 | Hallicrafters Co | Adjustable parallel-t network |
AU531239B2 (en) * | 1978-06-15 | 1983-08-18 | Plessey Overseas Ltd. | Directional arrays |
JPS5617536A (en) * | 1979-07-24 | 1981-02-19 | Fumio Ikegami | Radio receiving device |
US4907003A (en) | 1986-12-22 | 1990-03-06 | Microdyne Corporation | Satellite receiver and acquisiton system |
US4857777A (en) | 1987-03-16 | 1989-08-15 | General Electric Company | Monolithic microwave phase shifting network |
US4857778A (en) * | 1988-01-28 | 1989-08-15 | Maxim Integrated Products | Programmable universal active filter |
JP2580713B2 (en) * | 1988-06-03 | 1997-02-12 | 日本電気株式会社 | Circularly polarized antenna |
FR2638573B1 (en) * | 1988-11-03 | 1991-06-14 | Alcatel Espace | ELECTRONIC SCANNING ANTENNA |
US4896374A (en) * | 1988-12-09 | 1990-01-23 | Siemens Aktiengesellschaft | Broadband monolithic balanced mixer apparatus |
US4965602A (en) | 1989-10-17 | 1990-10-23 | Hughes Aircraft Company | Digital beamforming for multiple independent transmit beams |
US5045822A (en) | 1990-04-10 | 1991-09-03 | Pacific Monolithics | Active power splitter |
US5128687A (en) * | 1990-05-09 | 1992-07-07 | The Mitre Corporation | Shared aperture antenna for independently steered, multiple simultaneous beams |
US5086302A (en) * | 1991-04-10 | 1992-02-04 | Allied-Signal Inc. | Fault isolation in a Butler matrix fed circular phased array antenna |
DE9113444U1 (en) * | 1991-10-29 | 1992-01-09 | Siemens AG, 80333 München | Transmit/receive module for an electronically phased antenna |
US5351053A (en) * | 1993-07-30 | 1994-09-27 | The United States Of America As Represented By The Secretary Of The Air Force | Ultra wideband radar signal processor for electronically scanned arrays |
US5619503A (en) | 1994-01-11 | 1997-04-08 | Ericsson Inc. | Cellular/satellite communications system with improved frequency re-use |
US5539413A (en) | 1994-09-06 | 1996-07-23 | Northrop Grumman | Integrated circuit for remote beam control in a phased array antenna system |
US5907815A (en) | 1995-12-07 | 1999-05-25 | Texas Instruments Incorporated | Portable computer stored removable mobile telephone |
JP3279180B2 (en) * | 1996-06-07 | 2002-04-30 | 三菱電機株式会社 | Array antenna device |
JP3526196B2 (en) * | 1997-01-07 | 2004-05-10 | 株式会社東芝 | Adaptive antenna |
US5942929A (en) | 1997-05-22 | 1999-08-24 | Qualcomm Incorporated | Active phase splitter |
US5898362A (en) * | 1997-06-02 | 1999-04-27 | Motorola, Inc. | System for transmitting and receiving polarized CDMA signals and method of operation thereof |
GB2331193B (en) * | 1997-11-07 | 2001-07-11 | Plessey Semiconductors Ltd | Image reject mixer arrangements |
US6011512A (en) * | 1998-02-25 | 2000-01-04 | Space Systems/Loral, Inc. | Thinned multiple beam phased array antenna |
US6275187B1 (en) | 1998-03-03 | 2001-08-14 | General Electric Company | System and method for directing an adaptive antenna array |
US6377558B1 (en) | 1998-04-06 | 2002-04-23 | Ericsson Inc. | Multi-signal transmit array with low intermodulation |
US6411824B1 (en) | 1998-06-24 | 2002-06-25 | Conexant Systems, Inc. | Polarization-adaptive antenna transmit diversity system |
CN100413147C (en) | 1998-07-13 | 2008-08-20 | Ntt移动通信网株式会社 | Adaptive array antenna |
US6295035B1 (en) * | 1998-11-30 | 2001-09-25 | Raytheon Company | Circular direction finding antenna |
US5966049A (en) | 1998-12-01 | 1999-10-12 | Space Systems/Loral, Inc. | Broadband linearizer for power amplifiers |
EP1030441A3 (en) * | 1999-02-16 | 2004-03-17 | Matsushita Electric Industrial Co., Ltd. | Feedforward amplifier |
US6005515A (en) * | 1999-04-09 | 1999-12-21 | Trw Inc. | Multiple scanning beam direct radiating array and method for its use |
KR100323584B1 (en) | 1999-05-14 | 2002-02-19 | 오길록 | Optimal control method for Adaptive Feedforward Linear Amplifier |
US6430393B1 (en) * | 1999-08-23 | 2002-08-06 | Hughes Electronics Corporation | Satellite communication system using linear cell tracking |
JP4634557B2 (en) * | 1999-11-30 | 2011-02-16 | 富士通株式会社 | Signal canceling method and apparatus |
WO2001067597A1 (en) * | 2000-03-06 | 2001-09-13 | Fujitsu Limited | Preamplifier |
CA2405143A1 (en) * | 2000-04-07 | 2001-10-18 | The Chief Controller, Research And Development | Transmit/receiver module for active phased array antenna |
US6538603B1 (en) | 2000-07-21 | 2003-03-25 | Paratek Microwave, Inc. | Phased array antennas incorporating voltage-tunable phase shifters |
JP2002057515A (en) * | 2000-08-11 | 2002-02-22 | Nippon Telegr & Teleph Corp <Ntt> | Matrix circuit and phased array antenna using the same |
EP1193861B1 (en) | 2000-09-22 | 2006-11-15 | Matsushita Electric Industrial Co., Ltd. | Feedforward amplifier |
JP3576478B2 (en) * | 2000-11-01 | 2004-10-13 | 三菱電機株式会社 | Mobile satellite communication device and mobile satellite communication method |
SE517748C2 (en) | 2000-11-20 | 2002-07-09 | Totalfoersvarets Forskningsins | Reconfigurable broadband active power divider, including power combiner and dual bidirectional power divider / power combiner, and circuits made up of these |
US6611230B2 (en) | 2000-12-11 | 2003-08-26 | Harris Corporation | Phased array antenna having phase shifters with laterally spaced phase shift bodies |
US6677908B2 (en) * | 2000-12-21 | 2004-01-13 | Ems Technologies Canada, Ltd | Multimedia aircraft antenna |
US20030030895A1 (en) * | 2001-06-27 | 2003-02-13 | Vincent So | Optical amplifiers and optical amplifying method for improved noise figure |
US7027790B2 (en) * | 2001-08-10 | 2006-04-11 | Broadcom Corporation | Transceiver front-end |
US6806768B2 (en) * | 2001-10-31 | 2004-10-19 | Qualcomm Incorporated | Balanced power amplifier with a bypass structure |
US6657589B2 (en) * | 2001-11-01 | 2003-12-02 | Tia, Mobile Inc. | Easy set-up, low profile, vehicle mounted, in-motion tracking, satellite antenna |
JP2003168938A (en) | 2001-11-29 | 2003-06-13 | Sanyo Electric Co Ltd | Variable gain type differential amplifying circuit, and multiplying circuit |
US6750709B2 (en) * | 2001-11-30 | 2004-06-15 | The Boeing Company | Bipolar transistor-based linearizer with programmable gain and phase response system |
JP2003229738A (en) * | 2002-01-31 | 2003-08-15 | Mitsubishi Electric Corp | Analog phase shifter |
US6794938B2 (en) * | 2002-03-19 | 2004-09-21 | The University Of North Carolina At Charlotte | Method and apparatus for cancellation of third order intermodulation distortion and other nonlinearities |
US7233624B2 (en) * | 2002-06-11 | 2007-06-19 | Interdigital Technology Corporation | Method and system for all digital gain control |
US6784817B2 (en) | 2002-06-13 | 2004-08-31 | Matsushita Electric Industrial Co., Ltd. | Data generating method, data generator, and transmitter using the same |
JP2004040367A (en) * | 2002-07-02 | 2004-02-05 | Pioneer Electronic Corp | Receiver with function for removing adjacent interfering wave |
US7248625B2 (en) * | 2002-09-05 | 2007-07-24 | Silicon Storage Technology, Inc. | Compensation of I-Q imbalance in digital transceivers |
US7126541B2 (en) * | 2002-11-19 | 2006-10-24 | Farrokh Mohamadi | Beam forming phased array system in a transparent substrate |
US6759977B1 (en) * | 2002-12-20 | 2004-07-06 | Saab Marine Electronics Ab | Method and apparatus for radar-based level gauging |
US7684776B2 (en) * | 2002-12-24 | 2010-03-23 | Intel Corporation | Wireless communication device having variable gain device and method therefor |
US6828932B1 (en) | 2003-01-17 | 2004-12-07 | Itt Manufacutring Enterprises, Inc. | System for receiving multiple independent RF signals having different polarizations and scan angles |
JP2004241972A (en) * | 2003-02-05 | 2004-08-26 | Japan Radio Co Ltd | Array antenna system |
US7460623B1 (en) * | 2003-02-06 | 2008-12-02 | Broadlogic Network Technologies Inc. | Digital two-stage automatic gain control |
US7003263B2 (en) * | 2003-05-12 | 2006-02-21 | Lucent Technologies Inc. | Telecommunications receiver and a transmitter |
US7336939B2 (en) * | 2003-05-21 | 2008-02-26 | Broadcom Corporation | Integrated tracking filters for direct conversion and low-IF single conversion broadband filters |
US6946990B2 (en) | 2003-07-23 | 2005-09-20 | The Boeing Company | Apparatus and methods for radome depolarization compensation |
US7089859B2 (en) | 2003-09-17 | 2006-08-15 | Rx Label Corp. | Document with integrated coating |
EP1693922B1 (en) | 2003-10-30 | 2010-08-11 | Mitsubishi Denki Kabushiki Kaisha | Aircraft with an antenna apparatus |
US7173484B2 (en) * | 2003-11-25 | 2007-02-06 | Powerwave Technologies, Inc. | System and method of carrier reinjection in a feedforward amplifier |
US7142060B1 (en) * | 2003-12-31 | 2006-11-28 | Conexant Systems, Inc. | Active splitter for multiple reception units |
JP2005328260A (en) * | 2004-05-13 | 2005-11-24 | Mitsubishi Electric Corp | Band pass filter |
KR100613903B1 (en) * | 2004-05-13 | 2006-08-17 | 한국전자통신연구원 | Array Spacing Decision Method at Array Antenna using Genetic Algorithm and Array Antenna with Sofa Structure and Irregular Array Spacing |
US7319345B2 (en) * | 2004-05-18 | 2008-01-15 | Rambus Inc. | Wide-range multi-phase clock generator |
US20060045038A1 (en) | 2004-08-27 | 2006-03-02 | Stanley Kay | Method and apparatus for transmitting and receiving multiple services utilizing a single receiver in a broadband satellite system |
TWI284465B (en) * | 2004-09-23 | 2007-07-21 | Interdigital Tech Corp | Blind signal separation using correlated antenna elements |
US7327803B2 (en) * | 2004-10-22 | 2008-02-05 | Parkervision, Inc. | Systems and methods for vector power amplification |
US7746764B2 (en) * | 2004-10-22 | 2010-06-29 | Parkervision, Inc. | Orthogonal signal generation using vector spreading and combining |
US7355470B2 (en) | 2006-04-24 | 2008-04-08 | Parkervision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning |
CA2591913C (en) | 2004-12-30 | 2013-12-03 | Telefonaktiebolaget Lm Ericsson (Publ) | An antenna device for a radio base station in a cellular telephony system |
US7148749B2 (en) * | 2005-01-31 | 2006-12-12 | Freescale Semiconductor, Inc. | Closed loop power control with high dynamic range |
TWI264883B (en) * | 2005-02-04 | 2006-10-21 | Rdc Semiconductor Co Ltd | Active hybrid circuit of full duplex channel |
US7408507B1 (en) * | 2005-03-15 | 2008-08-05 | The United States Of America As Represented By The Secretary Of The Navy | Antenna calibration method and system |
US7180447B1 (en) * | 2005-04-29 | 2007-02-20 | Lockhead Martin Corporation | Shared phased array beamformer |
US7728784B2 (en) * | 2005-05-31 | 2010-06-01 | Tialinx, Inc. | Analog phase shifter |
KR100717993B1 (en) | 2005-09-27 | 2007-05-14 | 한국전자통신연구원 | Active balun device |
US7436370B2 (en) * | 2005-10-14 | 2008-10-14 | L-3 Communications Titan Corporation | Device and method for polarization control for a phased array antenna |
US7511665B2 (en) * | 2005-12-20 | 2009-03-31 | The United States Of America As Represented By The Secretary Of The Air Force | Method and apparatus for a frequency diverse array |
US7714581B2 (en) | 2006-04-19 | 2010-05-11 | Wisconsin Alumni Research Foundation | RF coil assembly for magnetic resonance imaging and spectroscopy systems |
US7937106B2 (en) * | 2006-04-24 | 2011-05-03 | ParkerVision, Inc, | Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same |
US8031804B2 (en) * | 2006-04-24 | 2011-10-04 | Parkervision, Inc. | Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion |
US7817757B2 (en) | 2006-05-30 | 2010-10-19 | Fujitsu Limited | System and method for independently adjusting multiple offset compensations applied to a signal |
US7400193B2 (en) * | 2006-06-29 | 2008-07-15 | Itt Manufacturing Enterprises, Inc. | Ultra wide band, differential input/output, high frequency active splitter in an integrated circuit |
US20080051053A1 (en) * | 2006-08-24 | 2008-02-28 | Orest Fedan | Dynamic, low if, image interference avoidance receiver |
US20080055151A1 (en) | 2006-08-29 | 2008-03-06 | Wildblue Communications, Inc. | Network-Access Satellite Communication System |
EP2089966A4 (en) * | 2006-10-24 | 2014-12-03 | Andrew M Teetzel | Rf system linearizer using controlled complex nonlinear distortion generators |
JP4648292B2 (en) * | 2006-11-30 | 2011-03-09 | 日立オートモティブシステムズ株式会社 | Millimeter-wave transceiver and in-vehicle radar using the same |
US20080129634A1 (en) | 2006-11-30 | 2008-06-05 | Pera Robert J | Multi-polarization antenna feeds for mimo applications |
US7620129B2 (en) * | 2007-01-16 | 2009-11-17 | Parkervision, Inc. | RF power transmission, modulation, and amplification, including embodiments for generating vector modulation control signals |
US7672653B2 (en) * | 2007-03-20 | 2010-03-02 | Intel Corporation | Removing interfering signals in a broadband radio frequency receiver |
US7706787B2 (en) | 2007-03-21 | 2010-04-27 | Com Dev International Ltd. | Multi-beam communication system and method |
WO2008126985A1 (en) | 2007-04-11 | 2008-10-23 | Electronics And Telecommunications Research Institute | Multi-mode antenna and method of controlling mode of the antenna |
US7869554B2 (en) | 2007-06-06 | 2011-01-11 | Honeywell International Inc. | Phase/frequency estimator-based phase locked loop |
WO2009005768A1 (en) | 2007-06-28 | 2009-01-08 | Parkervision, Inc. | Systems and methods of rf power transmission, modulation, and amplification |
US8085877B2 (en) | 2007-09-28 | 2011-12-27 | Broadcom Corporation | Method and system for quadrature local oscillator generator utilizing a DDFS for extremely high frequencies |
FR2922051A1 (en) | 2007-10-04 | 2009-04-10 | Axess Europ S A | ON-SATELLITE PACKAGE ANTENNA SYSTEM WITH POLARIZATION CONTROL |
US8848824B2 (en) * | 2008-03-07 | 2014-09-30 | Andrew M. Teetzel | High efficiency RF system linearizer using controlled complex nonlinear distortion generators |
JP2009260929A (en) * | 2008-03-28 | 2009-11-05 | Nec Electronics Corp | Splitter circuit |
DE102008047937A1 (en) * | 2008-09-18 | 2010-03-25 | Delphi Delco Electronics Europe Gmbh | Broadcasting Reception System |
US8013784B2 (en) * | 2009-03-03 | 2011-09-06 | Toyota Motor Engineering & Manufacturing North America, Inc. | Butler matrix for 3D integrated RF front-ends |
US8693970B2 (en) | 2009-04-13 | 2014-04-08 | Viasat, Inc. | Multi-beam active phased array architecture with independant polarization control |
JP5603927B2 (en) | 2009-04-13 | 2014-10-08 | ビアサット・インコーポレイテッド | Multi-beam active phased array architecture |
US8587492B2 (en) | 2009-04-13 | 2013-11-19 | Viasat, Inc. | Dual-polarized multi-band, full duplex, interleaved waveguide antenna aperture |
US8817672B2 (en) | 2009-04-13 | 2014-08-26 | Viasat, Inc. | Half-duplex phased array antenna system |
US8026762B2 (en) * | 2009-06-18 | 2011-09-27 | Alcatel Lucent | High efficiency transmitter for wireless communication |
JP5617536B2 (en) | 2010-09-09 | 2014-11-05 | 株式会社リコー | Protective agent supply member, protective layer forming apparatus, image forming method, image forming apparatus, and process cartridge |
US8378870B1 (en) | 2011-09-07 | 2013-02-19 | Panasonic Corporation | Mismatch shaping for DAC |
US8699626B2 (en) | 2011-11-29 | 2014-04-15 | Viasat, Inc. | General purpose hybrid |
US8737531B2 (en) | 2011-11-29 | 2014-05-27 | Viasat, Inc. | Vector generator using octant symmetry |
-
2010
- 2010-04-13 JP JP2012506127A patent/JP5603927B2/en active Active
- 2010-04-13 US US12/759,043 patent/US8400235B2/en active Active
- 2010-04-13 JP JP2012506124A patent/JP5677697B2/en active Active
- 2010-04-13 TW TW099111391A patent/TWI517499B/en active
- 2010-04-13 TW TW099111390A patent/TWI504056B/en active
- 2010-04-13 TW TW099111399A patent/TWI524593B/en active
- 2010-04-13 US US12/759,130 patent/US8228232B2/en active Active
- 2010-04-13 EP EP13193382.2A patent/EP2725657B1/en active Active
- 2010-04-13 US US12/759,123 patent/US8289209B2/en active Active
- 2010-04-13 US US12/759,064 patent/US8030998B2/en active Active
- 2010-04-13 US US12/759,059 patent/US8160530B2/en active Active
- 2010-04-13 TW TW099111389A patent/TWI515970B/en active
- 2010-04-13 WO PCT/US2010/030871 patent/WO2010120762A2/en active Application Filing
- 2010-04-13 WO PCT/US2010/030864 patent/WO2010120756A1/en active Application Filing
- 2010-04-13 US US12/759,113 patent/US8416882B2/en active Active
- 2010-04-13 WO PCT/US2010/030868 patent/WO2010120760A2/en active Application Filing
- 2010-04-13 TW TW099111400A patent/TWI505633B/en active
- 2010-04-13 WO PCT/US2010/030866 patent/WO2010120758A2/en active Application Filing
- 2010-04-13 US US12/758,996 patent/US8452251B2/en active Active
- 2010-04-13 EP EP10713546.9A patent/EP2419963B1/en active Active
- 2010-04-13 WO PCT/US2010/030892 patent/WO2010120779A2/en active Application Filing
- 2010-04-13 EP EP10716940.1A patent/EP2419964B1/en active Active
- 2010-04-13 WO PCT/US2010/030881 patent/WO2010120770A1/en active Application Filing
- 2010-04-13 TW TW099111395A patent/TWI543435B/en active
- 2010-04-13 WO PCT/US2010/030876 patent/WO2010120767A2/en active Application Filing
- 2010-04-13 US US12/759,148 patent/US8289083B2/en active Active
- 2010-04-13 TW TW099111386A patent/TWI535194B/en active
- 2010-04-13 TW TW099111387A patent/TWI504061B/en active
- 2010-04-13 WO PCT/US2010/030877 patent/WO2010120768A2/en active Application Filing
-
2012
- 2012-03-06 US US13/412,901 patent/US8639204B2/en active Active
- 2012-07-02 US US13/540,394 patent/US8410980B2/en active Active
-
2013
- 2013-02-20 US US13/771,884 patent/US8773219B2/en active Active
- 2013-12-17 US US14/109,306 patent/US9537214B2/en active Active
-
2014
- 2014-08-22 JP JP2014169015A patent/JP5798675B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3119965A (en) * | 1960-08-08 | 1964-01-28 | Electronic Communications | System for splitting ultra-high-frequency power for divided transmission |
US4994773A (en) * | 1988-10-13 | 1991-02-19 | Chen Tzu H | Digitally controlled monolithic active phase shifter apparatus having a cascode configuration |
EP0762660A2 (en) * | 1995-08-08 | 1997-03-12 | AT&T IPM Corp. | Apparatus and method for electronic polarization correction |
US20030162566A1 (en) * | 2000-05-05 | 2003-08-28 | Joseph Shapira | System and method for improving polarization matching on a cellular communication forward link |
WO2003036756A2 (en) * | 2001-10-22 | 2003-05-01 | Qinetiq Limited | Antenna system |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9094102B2 (en) | 2009-04-13 | 2015-07-28 | Viasat, Inc. | Half-duplex phased array antenna system |
US9425890B2 (en) | 2009-04-13 | 2016-08-23 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US9843107B2 (en) | 2009-04-13 | 2017-12-12 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US10305199B2 (en) | 2009-04-13 | 2019-05-28 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US10516219B2 (en) | 2009-04-13 | 2019-12-24 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US10797406B2 (en) | 2009-04-13 | 2020-10-06 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US11038285B2 (en) | 2009-04-13 | 2021-06-15 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US11509070B2 (en) | 2009-04-13 | 2022-11-22 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US11791567B2 (en) | 2009-04-13 | 2023-10-17 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US12088016B2 (en) | 2009-04-13 | 2024-09-10 | Viasat, Inc. | Multi-beam active phased array architecture with independent polarization control |
US8837632B2 (en) | 2011-11-29 | 2014-09-16 | Viasat, Inc. | Vector generator using octant symmetry |
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