EP3482448A1 - Controllable phase control element for electromagnetic waves - Google Patents
Controllable phase control element for electromagnetic wavesInfo
- Publication number
- EP3482448A1 EP3482448A1 EP17737506.0A EP17737506A EP3482448A1 EP 3482448 A1 EP3482448 A1 EP 3482448A1 EP 17737506 A EP17737506 A EP 17737506A EP 3482448 A1 EP3482448 A1 EP 3482448A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- controllable phase
- polarizers
- phase actuator
- holder
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/165—Auxiliary devices for rotating the plane of polarisation
- H01P1/17—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
- H01P1/172—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation using a dielectric element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/165—Auxiliary devices for rotating the plane of polarisation
- H01P1/17—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
- H01P1/182—Waveguide phase-shifters
-
- 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
- H01Q3/32—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 mechanical means
Definitions
- the invention relates to a controllable phase actuator for electromagnetic waves, in particular for the GHz frequency range and in particular for antennas.
- Controllable phase shifters are used in a variety of RF systems in signal processing.
- An important field of application are antennas or
- phase shifters controllable phase actuators
- Antenna groups can be spatially changed.
- the main beam in different directions.
- Phase actuators change the relative phase of the signals from different individual antennas
- Group antenna are received or sent. Is the relative phase of the signals of the individual antennas using the
- aircraft or ships have the task of controlling the main beam of the array during the phase control always optimally align the spatial movement of the mobile carrier with a target.
- a moving target can be tracked using phase control.
- phase actuators are mostly off
- solid state phase shifters mostly ferrites, microswitches (MEMS technology, binary switches), or liquid crystals ("liquid cristals”).
- High frequency power is dissipated in the phase actuators. Especially in applications in the GHz range, the sinks
- phased array antennas in which
- phase actuator technology allows the reliable instantaneous, i. immediate, possible without additional calculation, determination of the phase position of the signal after the phase actuator. For this purpose, it would be necessary to be able to reliably determine the state of the phase actuator at any time. However, this is practically impossible for solid state, MEMS or liquid crystal phase shifters.
- a dining system for a parabolic antenna can be removed, which is mounted on a rotatable support, and includes a polarizer and a polarization diverter.
- the object of the invention is therefore a controllable phase actuator, in particular in the GHz frequency range and
- a controllable phase control element comprises a drive unit (2) and a holder (3) on which at least two polarizers (4) arranged one after the other in the direction of incidence of a shaft are mounted.
- Each polarizer (4) is designed so that it can convert a circularly polarized signal into a linearly polarized signal.
- the drive unit (2) is designed so that the holder (3) can be rotated. This also turns the polarizers (4) by one
- FIG. 2 shows a phase shift of a circular wave
- FIG. 3 shows a polarizer in plan view
- FIG. 4 shows a phase actuator in a waveguide
- FIG. 5 shows a plurality of phase actuators within an antenna
- FIG. 6 shows a further exemplary embodiment of one
- Figure 9-11 further embodiments of a
- Phase actuator with additional polarizers and a phase shift of a circular wave The basic mode of operation of the invention is shown in FIG. An incident wave (5a) with circular
- Polarization and phase position ⁇ is transformed by the first polarizer (4a) into a wave with linear polarization (5b). These are reconverted by the second polarizer (4b) into a circular polarization wave (5c).
- phase actuator (1) now with the aid of the drive unit (2) rotated by an angle .DELTA. ⁇ , then rotates the
- the dependence of the phase angle difference between outgoing (5c) and incoming (5b) circular waves from the rotation of the phase actuator (1) is strictly linear, continuous and strictly 2n periodic.
- any phase rotation or phase shift can be adjusted continuously by the drive unit (2).
- the phase actuator (1) is advantageously a purely passive component, which does not have to contain any nonlinear components, its function is completely reciprocal. That is, a wave which passes from bottom to top through the phase actuator (1), in is rotated in phase in the same way as a wave, which runs from top to bottom through the phase actuator (1).
- the wave impedance of the arrangement is by design completely independent of the relative phase of incoming and outgoing wave, which is not the case with non-linear phase shifters such as semiconductor phase shifters or liquid crystal phase shifters. There, the wave impedance depends on the relative phase angle, which makes these components difficult to control.
- the at least two polarizers (4a) and (4b) are preferably mounted perpendicular to the propagation direction of the incident wave and parallel to each other in the holder (3).
- the axis of rotation (6) is preferably in the propagation direction of the incident wave.
- the controllable phase actuator works practically
- induced losses are very small. At frequencies of 20 GHz, for example, the total losses are less than 0.2 dB, which corresponds to an efficiency of more than 95%. By contrast, conventional phase shifters typically already have losses of several dB at these frequencies.
- the drive unit (2) is also equipped with an angular position sensor or if it is already self-aligning (as is the case, for example, with some piezo motors), then the
- phase control can be very fine. Because of the simple structure of the phase actuator (1) and the fact that only very simple design drives (2) are required, the phase control can be very
- the polarizers (4a, b) may e.g. from simple, even
- Meander polarizers which are placed on a substrate, e.g. a high frequency suitable board, are applied. These polarizers can be produced by known etching processes or by additive processes ("circuit printing").
- Polarizers (4a) and (4b) preferably a symmetrical to the axis (5) shape.
- the polarizer (4a, b) shown in FIG. 3 is referred to as
- Meander polarizer executed.
- electromagnetic wave polarizers that can transform a circular polarization wave into a linear polarization wave.
- dielectric materials such as low-density closed-cell foams which have very low HF losses, but also plastic materials such as polytetrafluoroethylene (Teflon) or polyimides can be used. Because of the small size of the phase actuator in the range of one wavelength, especially at frequencies above 10 GHz, the HF losses with a corresponding impedance matching also remain very small here.
- FIG. 4 shows schematically in an exemplary application an antenna element (6), which is preceded by a phase control according to the invention.
- the signal via a coupling (31) in the waveguide section (2) is fed.
- the signal then passes through the phase actuator (1) and is the output (32) for
- Antenna element (6) passed. With the aid of the drive (2), which rotates the phase actuator (1) in the waveguide with the aid of the connecting element (33), the phase position of the signal generated by the
- Antenna element (6) is radiated, can be set arbitrarily.
- the processing of a received signal is carried out in the same way: the signal received by the antenna element (6) is in the
- the phase of the received signal can be set arbitrarily again with the aid of the drive (2).
- a receiver amplifier can already be installed to compensate, for example, power network losses.
- the connecting element (33) is designed as an axis and is preferably made of a non-metallic, dielectric material such as plastic. This has the advantage that
- cylindrical cavity modes do not, or are disturbed very little if the axis is mounted symmetrically in the waveguide.
- the coupling-in structure (31) or the coupling-out structure (32) can be designed as a loop, as shown in FIG. 4, so that a cylindrical cavity mode is directly excited.
- embodiments are also conceivable in which two signals with orthogonal pins on or
- the phase position of the two signals is then such that a cylindrical cavity mode is also excited.
- the shape of the waveguide is preferably a hollow cylinder.
- FIG. 5 Another embodiment of the invention is shown in FIG. 5
- the phase actuator (1) consists of the two polarizing plates (4a, 4b) and the holder (3) and is mounted in a cylindrical waveguide piece (50).
- the Waveguide piece (50) is in another cylindrical
- Waveguide (51) introduced such that the waveguide piece
- a drive unit (2) has a roller (53), so that the hollow conductor piece (50) and thus also the phase actuator (1) can be rotated by the drive unit (2).
- phase control according to the invention does not affect the propagation direction, then this waveguide mode becomes a phase angle imprinted, which depends linearly on the angular position of the phase actuator.
- the holder (3) is designed as a dielectric filling body which completely fills the hollow conductor piece (50) and in which the polarizers (4a, 4b) are embedded.
- the waveguide piece (50) is equipped with an outer sprocket (54), so that over the
- Gear coupling (55), the drive unit (2) the waveguide piece (50) together with phase actuator (1) can rotate.
- the polarizers (4a, 4b) are designed here as two pairs. This can have the advantage of higher polarization decoupling and / or greater frequency bandwidth.
- the polarizers of a pair have a distance from each other that is much smaller than a wavelength. Both pairs are spaced from each other by about half the wavelength to couple both
- the holder is designed as a dielectric filling body, which completely fills a hollow conductor piece, then it is also conceivable to metallize the dielectric filling body on its outer side, where it touches the hollow conductor piece (50). This is advantageous if the component should be very light, because then the waveguide piece (50) can be omitted.
- Embodiments are also conceivable in which the conversion of the signal polarization is not effected by planar polarizers or
- Supported structures are made (e.g., septum polaristors). For the function of the invention, it is only important that these structures have an incident wave with circular
- FIGS. 4, 5 and 6 can typically be easily integrated into the feed networks of group antennas because of their small space requirement.
- a frequency of 20 GHz e.g. are the dimensions
- the holder (3) is designed as a dielectric filling body and the dielectric constant chosen to be correspondingly large, then also much smaller construction volumes can be realized. Although the Ohmic losses rise slightly, they are still only in the percentage range.
- Phase control especially in the frequency range above 10 GHz, is then typically only a few grams. Added to this is the very low dissipation of the phase control according to the invention.
- the heat input of the phase actuators is negligible because of the very low Ohmic losses. If electric motors are used as drive units, then their efficiency is typically> 95%, so that the
- FIG. 7 A further advantageous embodiment of the invention is shown in FIG. 7.
- the holder (3) is designed here as a star-shaped packing with a cylindrical outer contour.
- four slots are provided for the pairs of polarizers (4a, 4b), as well as a central bore for the shaft (56).
- the advantage lies in the simple production.
- the polarizers (4a, 4b) can be inserted directly into the slots of the holder (3)
- phase actuator (1) results.
- the axis (56) can be glued directly into a hole in the holder (3) and connected to the drive unit (2).
- the axis (56) is directly the axis of an electric motor, which thus directly the required
- FIG. 1 A further development of the invention for direct processing of signals with linear polarization is shown in FIG.
- the further development provides that in front of the phase actuator (1) at least one further polarizer (41) is mounted, which signals with linear polarization in signals with circular
- Polarization can be transformed, and after the phase actuator (1) at least one further polarizer (42) is mounted, which signals of circular polarization in signals linear
- the phase actuator (1) further consists of the holder (3) and the polarizers (4) and has a drive unit (2) which is designed and with the
- Phase actuator (1) or the holder (3) is connected such that the holder (3) and the phase actuator (1) can be rotated.
- FIG. 9 An incident wave of linear polarization (7a) with phase position ⁇ is converted by the polarizer (41) mounted in front of the phase actuator (1) into a signal with circular
- Polarization (7b) then falls on the rotatable phase actuator (1) and becomes more linear from the polarizer (4a) into a wave
- the spatially rotated signal of linear polarization is then transformed by the polarizer (4b) into a signal of circular polarization (7d) whose phase position now depends in a linear manner on the rotation of the phase actuator. Will the phase actuator rotated by an angle ⁇ , then the circular shaft (7d) has the phase position ⁇ + 2 ⁇ .
- the double change 2 ⁇ is due to the co-rotation of the polarizers (4a) and (4b).
- the signal circular polarization (7d) with phase angle ⁇ + 2 ⁇ is finally transformed back by the polarizer (42) into a signal with linear polarization (7e), which then also has the phase position ⁇ + 2 ⁇ .
- the position of the vector of linear polarization of the shaft (7e) relative to the position of the polarization vector of the incident wave (7a) in the plane perpendicular to the propagation direction depends on the relative orientation of the two polarizers (5) and (6). If these are the same, then they are
- Polarization vectors of the waves (7a) and (7e) are the same. If, on the other hand, the polarizers (5) and (6) are oriented differently, then the polarization vectors of the waves (7a) and (7e) form an angle which depends on the relative orientation of the waves
- Polarizers (41) and (42) is determined.
- Antenna applications may occur, one or both polarizers (41) and (42) to design rotatable and with its own
- Phase actuator (1) are rotated, then the polarizer (41) can follow a rotation of the linear polarization (7a) of the incident wave. This creates a novel arrangement, with their Help simultaneously tracked the signal polarization and the phase angle of the signal can be adjusted.
- FIG. 11 shows by way of example a phased array antenna with 4 antenna elements, which in its
- Supply network (10) contains controllable phase actuators.
- the signals of all four antenna elements are transmitted via the
- Feed network (10) merged.
- the control of the drives of the individual phase controls takes place e.g. through a
- Microprocessor (11) Are the phase controls now using the microprocessor (11) set so that between the
- Phase difference ⁇ shows the main beam of the
- the antenna pattern of the array is in each state of
- Group antenna i.e., at any time
- the array antennas contain several thousand individual antennas, as e.g. In the frequency range above 10 GHz is typically the case, with the help of a Fast Fourier Transformation (FFT), the corresponding antenna pattern with relatively low computing power can be calculated very accurately.
- FFT Fast Fourier Transformation
- FIGS. 1 to 7 apply analogously also to those shown in FIGS. 8-10
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Networks Using Active Elements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016112583.0A DE102016112583A1 (en) | 2016-07-08 | 2016-07-08 | Controllable phase actuator for electromagnetic waves |
PCT/EP2017/065890 WO2018007212A1 (en) | 2016-07-08 | 2017-06-27 | Controllable phase control element for electromagnetic waves |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3482448A1 true EP3482448A1 (en) | 2019-05-15 |
EP3482448B1 EP3482448B1 (en) | 2020-08-05 |
Family
ID=59313208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17737506.0A Active EP3482448B1 (en) | 2016-07-08 | 2017-06-27 | Controllable phase control element for electromagnetic waves |
Country Status (7)
Country | Link |
---|---|
US (1) | US10868349B2 (en) |
EP (1) | EP3482448B1 (en) |
CN (1) | CN109417210B (en) |
DE (1) | DE102016112583A1 (en) |
ES (1) | ES2824513T3 (en) |
IL (1) | IL264101B (en) |
WO (1) | WO2018007212A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017112552A1 (en) | 2017-06-07 | 2018-12-13 | Lisa Dräxlmaier GmbH | ANTENNA WITH SEVERAL SINGLE RADIATORS |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2438119A (en) * | 1942-11-03 | 1948-03-23 | Bell Telephone Labor Inc | Wave transmission |
NL72696C (en) | 1945-04-26 | |||
JPS5927522B2 (en) | 1979-01-30 | 1984-07-06 | 日本高周波株式会社 | rotary phase shifter |
IT1181958B (en) * | 1985-03-27 | 1987-09-30 | Selenia Spazio Spa | DEVICE FOR THE LOSS-FREE COMBINATION OF THE RF POWER OF TWO OR MORE MICROWAVE TRANSMITTERS WORKING IN PARALLEL AND WITH ANY POWER RATIO |
JPH01126803A (en) | 1987-11-12 | 1989-05-18 | Mitsubishi Electric Corp | Horn antenna system |
DE3741501C1 (en) * | 1987-12-08 | 1989-02-02 | Kathrein Werke Kg | Excitation or feed system for a parabolic antenna |
DE3920563A1 (en) * | 1989-06-23 | 1991-01-10 | Mueller Heinz Juergen Dipl Ing | Energising and supply system for parabolic antenna - e.g. for satellite communications using polariser, polarisation switching device and converter for different, frequency ranges |
JP3343408B2 (en) | 1993-08-24 | 2002-11-11 | 株式会社トキメック | Circularly polarized antenna |
US6166610A (en) * | 1999-02-22 | 2000-12-26 | Hughes Electronics Corporation | Integrated reconfigurable polarizer |
US20050046511A1 (en) * | 2003-08-29 | 2005-03-03 | Spx Corporation | Switchless combining system and method |
DE102010014916B4 (en) * | 2010-04-14 | 2012-10-31 | Aeromaritime Systembau Gmbh | Phased array antenna |
CN102938497B (en) * | 2012-11-20 | 2014-12-17 | 北京遥测技术研究所 | Four-band multi-polarization co-aperture feed source |
-
2016
- 2016-07-08 DE DE102016112583.0A patent/DE102016112583A1/en not_active Withdrawn
-
2017
- 2017-06-27 ES ES17737506T patent/ES2824513T3/en active Active
- 2017-06-27 US US16/316,214 patent/US10868349B2/en active Active
- 2017-06-27 CN CN201780042452.8A patent/CN109417210B/en active Active
- 2017-06-27 WO PCT/EP2017/065890 patent/WO2018007212A1/en unknown
- 2017-06-27 EP EP17737506.0A patent/EP3482448B1/en active Active
-
2019
- 2019-01-06 IL IL264101A patent/IL264101B/en unknown
Also Published As
Publication number | Publication date |
---|---|
IL264101B (en) | 2022-06-01 |
CN109417210A (en) | 2019-03-01 |
US20200112074A1 (en) | 2020-04-09 |
IL264101A (en) | 2019-01-31 |
CN109417210B (en) | 2021-07-06 |
US10868349B2 (en) | 2020-12-15 |
ES2824513T3 (en) | 2021-05-12 |
WO2018007212A1 (en) | 2018-01-11 |
DE102016112583A1 (en) | 2018-01-11 |
EP3482448B1 (en) | 2020-08-05 |
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