CN116248074A - Ultra-wideband small-degree phase shifter, control method thereof and beam control system - Google Patents
Ultra-wideband small-degree phase shifter, control method thereof and beam control system Download PDFInfo
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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
- H03H11/16—Networks for phase shifting
- H03H11/22—Networks for phase shifting providing two or more phase shifted output signals, e.g. n-phase output
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- H—ELECTRICITY
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- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
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Abstract
The invention provides an ultra-wideband small-degree phase shifter. The reference state path comprises a first switch tube, a first transmission line and a first phase compensation circuit, wherein the first phase compensation circuit at least comprises a capacitor, the first phase compensation circuit is connected with the first transmission line in series to form a reference signal transmission path, the reference signal transmission path is connected with an input end and an output end of the first switch tube in parallel, and a control end of the first switch tube controls the connection or disconnection from the input end to the output end.
Description
Technical Field
The present invention relates to an ultra wideband phase shifter, and more particularly, to an ultra wideband small-degree phase shifter and a control method thereof, and a beam control system including the same.
Background
With the continuous development of active phased array radar technology, the subsystem, namely a beam control system, is increasingly developed towards ultra-wideband, high-precision, low-loss and high-integration directions, and the same requirements are put on a key device, namely a phase shifter. The beam scanning interval of the beam control system is small and the control precision is high, which requires the phase shifter to have ultra-wideband and small-degree phase shift steps.
The small phase shifting type phase shifter commonly used at present is a switch line type phase shifter, and fig. 1 shows a schematic block diagram of the conventional switch line type phase shifter. As shown in fig. 1, the conventional switch line type phase shifter controls two Single Pole Double Throw (SPDT) switches to alternately access a circuit, so that signals are switched and transmitted between two transmission lines, and the lengths of the two transmission lines L1 and L2 are different, so that the insertion phases of the signals after passing through the transmission lines with different lengths are different, and after switching, the phases of a reference state and a phase shift state are different, thereby realizing the jump of the reference state and the phase shift state and realizing the phase shift purpose. The phase shifter has simple principle, convenient application and small loss of a transmission line, but the design of two single-pole double-throw switches at the left end and the right end determines most of insertion loss of the phase shifter.
The phasor of the switch line type phase shifter can be represented by the following formula (1):
where f is the frequency, L1 and L2 are the lengths of the transmission lines L1 and L2, respectively, in the switch-mode phase shifter shown in FIG. 1, V p Is the voltage of the input signal.
It can be seen that the amount of phase shift
Is a function of the frequency and transmission line length difference. In the case of a determined transmission line length, it is difficult to add the phasor with the increase of the bandwidth>
The phase shift step is maintained at a small degree, so that the switch line type phase shifter is only suitable for a narrow-band occasion and is difficult to apply to a wide-band occasion. Meanwhile, two single-pole double-throw switches are adopted as a path switching means, so that extra loss is brought, and the path loss is increased.
The invention aims to solve the problems of narrow working bandwidth and large circuit loss of the traditional switch line type phase shifter.
Disclosure of Invention
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
In order to overcome the above-mentioned drawbacks, the present invention is directed to a circuit architecture for compensating for phase shift deviation, achieving broadband effect, simplifying switch design, and reducing circuit loss.
According to an aspect of the present invention, there is provided an ultra-wideband small-scale phase shifter, including a reference state path, where the reference state path includes a first switching tube, a first transmission line, and a first phase compensation circuit, where the first phase compensation circuit includes at least a capacitor, and the first phase compensation circuit is connected in series with the first transmission line to form a reference signal transmission path, and the reference signal transmission path is connected in parallel to an input end and an output end of the first switching tube, and a control end of the first switching tube controls on or off from the input end to the output end; the phase-shifting state path is cascaded with the reference state path, the phase-shifting state path comprises a second switching tube, a second transmission line and a second phase compensation circuit, the second phase compensation circuit at least comprises an inductor, the second phase compensation circuit is connected with the second transmission line in series to form a phase-shifting signal transmission path, the phase-shifting signal transmission path is connected with an input end and an output end of the second switching tube in parallel, and a control end of the second switching tube controls the input end to be connected or disconnected with the output end; when the reference signal is transmitted, the second switching tube is switched on, and the first switching tube is switched off; when the phase-shifting signal is transmitted, the first switching tube is switched on, and the second switching tube is switched off.
In an embodiment, the first phase compensation circuit includes a first capacitor and a first resistor, the first capacitor being connected in parallel with the first resistor.
In an embodiment, the second phase compensation circuit comprises a first inductance and a second resistance, the first inductance being connected in parallel with the second resistance.
In an embodiment, a phase compensation circuit is disposed at the input end of the phase-shifting path, between the output end of the phase-shifting path and the input end of the reference path, and at the output end of the reference path.
Furthermore, the input end of the phase-shifting state path, the output end of the phase-shifting state path and the input end of the reference state path are the same, and the phase compensation circuit is composed of an inductor and is respectively connected in series between the radio frequency input end of the ultra-wideband small-degree phase shifter and the input end of the phase-shifting state path, between the output end of the phase-shifting state path and the input end of the reference state path, and between the output end of the reference state path and the radio frequency output end of the ultra-wideband small-degree phase shifter. Further, any two of three inductors disposed at the input end of the phase-shift state path, between the output end of the phase-shift state path and the input end of the reference state path, and at the output end of the reference state path are coupled to each other.
In an embodiment, the control end of the first switching tube is provided with a first isolation resistor, and the first isolation resistor is connected in series between the control end of the first switching tube and the input end of the control signal thereof.
In an embodiment, the control end of the second switching tube is provided with a second isolation resistor, and the second isolation resistor is connected in series between the control end of the second switching tube and the input end of the control signal thereof.
In an embodiment, the ultra-wideband small-degree phase shifter further comprises a controller, the controller is connected with the control ends of the first switching tube and the second switching tube, and the controller controls the second switching tube to be turned on and the first switching tube to be turned off in response to the ultra-wideband small-degree phase shifter being in a reference state; and responding to the ultra-wideband small-degree phase shifter in a phase shift state, the controller controls the first switching tube to be conducted, and the second switching tube to be turned off.
According to another aspect of the present invention, there is also provided a beam steering system comprising an ultra wideband small-scale phase shifter as described in any one of the embodiments above.
According to still another aspect of the present invention, there is provided a control method for an ultra-wideband small-power phase shifter according to any one of the preceding embodiments, the control method including: the second switching tube is controlled to be conducted, and the first switching tube is controlled to be turned off in response to the ultra-wideband small-degree phase shifter being in a reference state; and responding to the ultra-wideband small-degree phase shifter being in a phase shift state, controlling the first switching tube to be conducted, and controlling the second switching tube to be turned off.
Drawings
The above features and advantages of the present invention will be better understood after reading the detailed description of embodiments of the present disclosure in conjunction with the following drawings.
Fig. 1 is a schematic circuit configuration diagram of a switch line type phase shifter according to the prior art;
FIG. 2 is a schematic circuit diagram of an ultra wideband small-scale phase shifter according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of an ultra-wideband small-scale phase shifter according to another embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of an ultra wideband small-scale phase shifter according to another embodiment of the present invention;
fig. 5 shows a schematic diagram of the phase-frequency curve of the circuit architecture shown in fig. 3 and two sets of comparison architectures.
Detailed Description
The following description is presented to enable one skilled in the art to make and use the invention and to incorporate it into the context of a particular application. Various modifications, as well as various uses in different applications will be readily apparent to persons skilled in the art, and the generic principles defined herein may be applied to a wide range of embodiments. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without limitation to these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention.
The reader is directed to all documents and documents filed concurrently with this specification and open to public inspection with this specification, and the contents of all such documents and documents are incorporated herein by reference. All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic set of equivalent or similar features.
Note that where used, the designations left, right, front, back, top, bottom, forward, reverse, clockwise, and counterclockwise are used for convenience only and do not imply any particular orientation of securement. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Note that, where used, further, preferably, further and more preferably, the brief description of another embodiment is made on the basis of the foregoing embodiment, and further, preferably, further or more preferably, the combination of the contents of the rear band with the foregoing embodiment is made as a complete construction of another embodiment. A further embodiment is composed of several further, preferably, still further or preferably arrangements of the strips after the same embodiment, which may be combined arbitrarily.
The invention is described in detail below with reference to the drawings and the specific embodiments. It is noted that the aspects described below in connection with the drawings and the specific embodiments are merely exemplary and should not be construed as limiting the scope of the invention in any way.
According to one aspect of the invention, an ultra-wideband small-degree phase shifter is provided, so as to solve the problems of narrow working bandwidth and high loss of the existing switch line type phase shifter.
Fig. 2 shows a schematic circuit configuration of an ultra-wideband small-degree phase shifter in an embodiment. As shown in fig. 2, includes a reference state path and a phase-shifted state path.
The reference state path includes a first switching tube M1, a first transmission line TL1, and a first phase compensation circuit Amd1. The first phase compensation circuit Amd1 is connected in series with the first transmission line TL1 to form a reference signal transmission path, and the reference signal transmission path is connected in parallel to the input end and the output end of the first switching tube M1, and the control end CM1 of the first switching tube M1 controls on or off of the input end to the output end.
The first transmission line TL1 is configured to provide a base phase of the reference state path, and the first phase compensation circuit Amd1 is configured to provide phase shift compensation of the reference state path, where the first phase compensation circuit Amd1 includes at least a compensation capacitor C1.
Correspondingly, the phase-shifting path comprises a second switching tube M2, a second transmission line TL2 and a second phase compensation circuit Amd2, the second phase compensation circuit Amd2 is connected with the second transmission line TL2 in series to form a phase-shifting signal transmission path, the phase-shifting signal transmission path is connected with the input end and the output end of the second switching tube M2 in parallel, and the control end CM2 of the second switching tube M2 controls the connection or disconnection from the input end to the output end.
The second transmission line TL2 is configured to provide a base phase of the phase-shifted path, and the second phase compensation circuit Amd2 is configured to provide phase-shift compensation of the phase-shifted path, where the second phase compensation circuit Amd2 includes at least a compensation inductor L1.
The first switching transistor M1 and the second switching transistor M2 may be implemented by using the same or different transistors that can implement a line on or off function. Preferably, a switching transistor with low loss, such as a triode or a field effect transistor, may be used, where the first switching transistor M1 or the second switching transistor M2 is a field effect transistor, the source of the field effect transistor is used as an input terminal, the drain is used as an output terminal, and the gate is used as a control terminal.
The first transmission line TL1 and the second transmission line TL2 may be microstrip lines, or other transmission lines that may provide a fundamental phase shift.
Preferably, the first phase compensation circuit ama 1 further comprises a first compensation resistor R1, the first compensation resistor is connected in parallel with the compensation capacitor C1, and further adjusts the reactance of the first phase compensation circuit ama 1, and adjusts the phase of the reference state path.
Preferably, the second phase compensation circuit ama 2 further includes a second compensation resistor R2, the second compensation resistor R2 is connected in parallel with the compensation inductor L1, and further adjusts the reactance of the second phase compensation circuit ama 2, and adjusts the phase of the phase-shifting path.
The phase shift path is connected in series with the reference state path, when the ultra wideband small-degree phase shifter is in the reference state, the second switching tube M2 is turned on, the first switching tube M1 is turned off, the second transmission line TL2 and the second phase compensation circuit Amd2 are bypassed by the second switching tube M2, the first transmission line TL1 and the first phase compensation circuit Amd1 are connected into the circuit, and the input signal is transmitted through the input end P IN The second switching tube M2, the first transmission line TL1 and the first phase compensation circuit Amd1 are transmitted to the output end P OUT The method comprises the steps of carrying out a first treatment on the surface of the When the ultra-wideband small-degree phase shifter is in a phase shift state, the first switching tube M1 is turned on, the second switching tube M2 is turned off, the first transmission line TL1 and the first phase compensation circuit Amd1 are bypassed by the first switching tube M1, the second transmission line TL2 and the second phase compensation circuit Amd2 are connected into the circuit, and an input signal is transmitted through the input end P IN The second phase compensation circuit Amd2, the second transmission line TL2 and the first switch tube M1 are transmitted to the output end P OUT 。
In particular embodiments, the ultra wideband small-scale phase shifter may also include other adapted functional modules.
Fig. 3 shows a schematic circuit configuration of an ultra-wideband small-degree phase shifter in an embodiment.
Preferably, compared with the embodiment shown in fig. 2, the ultra-wideband small-degree phase shifter in the embodiment shown in fig. 3 further includes a first isolation unit B1 disposed at the control end of the first switching tube M1 to isolate the radio frequency signal, thereby reducing circuit loss. Specifically, the first isolation unit B1 may be implemented using a resistor.
Preferably, compared with the embodiment shown in fig. 2, the ultra-wideband small-degree phase shifter in the embodiment shown in fig. 3 further includes a second isolation unit B2, which is disposed at the control end of the second switching tube M2 to isolate the radio frequency signal, so as to reduce circuit loss. Specifically, the first isolation unit B2 may be implemented using a resistor.
Further, with respect to the embodiment shown in fig. 2, the ultra-wideband small-scale phase shifter may further include a plurality of inter-stage matching units. Preferably, as shown in fig. 3, the ultra-wideband small-scale phase shifter may include three inter-stage matching units MC1, MC2 and MC3 respectively disposed between the output end of the first switching tube M1, the output end of the second switching tube M2 and the input end of the first switching tube M1, and the input end of the second switching tube M2. The inter-stage matching unit MC1 may be used as an input matching unit to achieve matching of input impedance; the inter-stage matching unit MC3 can be used as an output matching unit to realize matching of output impedance; the inter-stage matching unit MC2 is for realizing impedance matching between the phase-shifted transmission path and the reference transmission path.
It will be appreciated by those skilled in the art that the circuit configurations of the inter-stage matching units MC1, MC2, and MC3 may be the same or different. In the specific embodiment shown in fig. 3, the inter-stage matching units MC1, MC2, and MC3 are implemented using matching inductors. The interstage matching units MC1, MC2 and MC3 formed by matching inductance are respectively connected in series with the input end P of the ultra-wideband small-degree phase shifter IN Between the output end of the second switching tube M2 and the input end of the first switching tube M1, between the output end of the second switching tube M2 and the input end of the first switching tube M1 and the output end P of the ultra-wideband small-degree phase shifter OUT Between them.
In other embodiments, any two of the inter-stage matching cells MC1, MC2, and MC3 configured with matching inductors are coupled to each other. That is, the inter-stage matching unit MC1 and the inter-stage matching unit MC2 are coupled, or the inter-stage matching unit MC1 and the inter-stage matching unit MC3 are coupled, or the inter-stage matching unit MC2 and the inter-stage matching unit MC3 are coupled.
Further, the ultra-wideband small-degree phase shifter may further include a controller for controlling the operating states of the first switching tube and the second switching tube.
Fig. 4 illustrates an embodiment of an ultra wideband small-scale phase shifter, as shown in fig. 4, where the ultra wideband small-scale phase shifter may further include a controller 410, and the controller 410 is electrically connected to the control terminal CM1 of the first switching tube M1 and the control terminal CM2 of the second switching tube M2, respectively. In response to the ultra-wideband small-degree phase shifter being in the reference state, the controller 410 controls the second switching tube M2 to be turned on and the first switching tube M1 to be turned off; in response to the ultra-wideband small-degree phase shifter being in the phase shift state, the controller 410 controls the first switching tube M1 to be turned on and the second switching tube M2 to be turned off.
According to another aspect of the present invention, there is also provided a beam steering system including the ultra wideband small-scale phase shifter of any of the preceding embodiments.
According to still another aspect of the present invention, there is also provided a control method of an ultra-wideband small-power phase shifter, which is applicable to the ultra-wideband small-power phase shifter in any of the foregoing embodiments.
Specifically, the control method of the ultra-wideband small-degree phase shifter comprises the following steps: the ultra-wideband small-degree phase shifter is in a reference state, the second switching tube M2 is controlled to be turned on, and the first switching tube M1 is controlled to be turned off; and in response to the ultra-wideband small-degree phase shifter being in a phase shift state, the first switching tube M1 is controlled to be turned on, and the second switching tube M2 is controlled to be turned off.
The present invention has been simulated and tested for phase shifting effects based on the circuit architecture of the ultra wideband small-degree phase shifter of the specific embodiment shown in fig. 3, and fig. 5 shows the phase diagram of the circuit architecture shown in fig. 3 and its two sets of comparison architectures. The two sets of circuit architectures are substantially identical to the circuit architecture shown in fig. 3, except that: the reference state transmission path of the phase shift contrast architecture of one group of transmission lines does not comprise the first phase compensation circuit Amd1 shown in fig. 3, and the phase shift state transmission path does not comprise the second phase compensation circuit Amd2 shown in fig. 3; the reference transmission path of the other set of LC phase shifting contrast architecture does not include the first transmission line TL1 shown in fig. 3, and the phase shifting transmission path does not include the second transmission line TL2 shown in fig. 3. As shown in fig. 5, the phase shift slope of the transmission line phase shift contrast architecture is positive; the phase shift slope of the LC phase shift contrast architecture is negative; the circuit architecture disclosed by the invention integrates two groups of comparison architectures, the phase precision is obviously improved, the fluctuation is small, and the ultra-small degree phase shift of the multi-octave ultra-wideband can be realized.
In addition, the embedded switch is used, so that the switch design is simplified, the structure is simple and compact, and the circuit loss is reduced.
The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. It is to be understood that the scope of the invention is to be controlled by the appended claims and not limited to the specific constructions and components of the above-described embodiments. Various changes and modifications to the embodiments may be made by those skilled in the art within the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the invention.
Claims (11)
1. An ultra-wideband small-degree phase shifter, comprising:
the reference state path comprises a first switch tube, a first transmission line and a first phase compensation circuit, wherein the first phase compensation circuit at least comprises a capacitor, the first phase compensation circuit is connected with the first transmission line in series to form a reference signal transmission path, the reference signal transmission path is connected with an input end and an output end of the first switch tube in parallel, and a control end of the first switch tube controls the connection or disconnection from the input end to the output end;
the phase-shifting state path is cascaded with the reference state path, the phase-shifting state path comprises a second switching tube, a second transmission line and a second phase compensation circuit, the second phase compensation circuit at least comprises an inductor, the second phase compensation circuit is connected with the second transmission line in series to form a phase-shifting signal transmission path, the phase-shifting signal transmission path is connected with an input end and an output end of the second switching tube in parallel, and a control end of the second switching tube controls the input end to be connected or disconnected with the output end;
when the reference signal is transmitted, the second switching tube is switched on, and the first switching tube is switched off; when the phase-shifting signal is transmitted, the first switching tube is switched on, and the second switching tube is switched off.
2. The ultra-wideband small number phase shifter of claim 1, wherein the first phase compensation circuit includes a first capacitor and a first resistor, the first capacitor being connected in parallel with the first resistor.
3. The ultra-wideband small-scale phase shifter of claim 1, wherein the second phase compensation circuit includes a first inductance and a second resistance, the first inductance being in parallel with the second resistance.
4. An ultra wideband small-scale phase shifter according to any one of claims 1-3, wherein the input end of the phase shift state path, the output end of the phase shift state path, and the input end of the reference state path are provided with phase compensation circuits.
5. The ultra-wideband small-scale phase shifter of claim 4, wherein the phase compensation circuits provided between the input end of the phase-shift state path, the output end of the phase-shift state path and the input end of the reference state path, and the output end of the reference state path are identical, and the phase compensation circuits are composed of inductors respectively connected in series between the radio frequency input end of the ultra-wideband small-scale phase shifter and the input end of the phase-shift state path, between the output end of the phase-shift state path and the input end of the reference state path, and between the output end of the reference state path and the radio frequency output end of the ultra-wideband small-scale phase shifter.
6. The ultra-wideband small-scale phase shifter of claim 5, wherein any two of three inductors disposed between the input of the phase-shifting state path, the output of the phase-shifting state path, and the input of the reference state path, and the output of the reference state path, are coupled to each other.
7. The ultra-wideband small-scale phase shifter of claim 1, wherein the control end of the first switching tube is provided with a first isolation resistor, and the first isolation resistor is connected in series between the control end of the first switching tube and the input end of the control signal thereof.
8. The ultra-wideband small-scale phase shifter of claim 1, wherein the control end of the second switching tube is provided with a second isolation resistor, and the second isolation resistor is connected in series between the control end of the second switching tube and the input end of the control signal thereof.
9. The ultra-wideband small-scale phase shifter of claim 1, further comprising a controller connected to control ends of the first switching tube and the second switching tube,
the controller controls the second switching tube to be conducted and the first switching tube to be turned off in response to the ultra-wideband small-degree phase shifter being in a reference state; and
and the controller controls the first switching tube to be conducted and the second switching tube to be turned off in response to the ultra-wideband small-degree phase shifter being in a phase shifting state.
10. A beam steering system comprising an ultra wideband small degree phase shifter according to any one of claims 1 to 9.
11. A control method of an ultra-wideband small-degree phase shifter, which is applicable to the ultra-wideband small-degree phase shifter according to any one of claims 1 to 9, the control method comprising:
the second switching tube is controlled to be conducted, and the first switching tube is controlled to be turned off in response to the ultra-wideband small-degree phase shifter being in a reference state; and
and controlling the first switching tube to be conducted and the second switching tube to be turned off in response to the ultra-wideband small-degree phase shifter being in a phase shifting state.
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| US20110199141A1 (en) * | 2008-10-24 | 2011-08-18 | Electronics And Telecommunications Research Institute | Phase shifter and control method thereof |
| US10566952B1 (en) * | 2018-12-27 | 2020-02-18 | Industrial Technology Research Institute | Phase shifter with broadband and phase array module using the same |
| CN111130488A (en) * | 2019-12-27 | 2020-05-08 | 中电国基南方集团有限公司 | Ultra-wideband phase-shifting circuit |
| CN112865760A (en) * | 2019-11-28 | 2021-05-28 | 财团法人工业技术研究院 | Switching type phase shifter |
| CN114221639A (en) * | 2022-01-17 | 2022-03-22 | 苏州东山精密制造股份有限公司 | Multichannel selective digital phase shifter |
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2023
- 2023-03-22 CN CN202310284605.7A patent/CN116248074B/en active Active
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| EP0409374A2 (en) * | 1989-07-18 | 1991-01-23 | Mitsubishi Denki Kabushiki Kaisha | A Microwave or Millimetre Wave Circuit |
| CN101192819A (en) * | 2006-11-29 | 2008-06-04 | 南京理工大学 | Micro-wave mm wave broadband and low consumption digital analog compatible phase shifter |
| US20110199141A1 (en) * | 2008-10-24 | 2011-08-18 | Electronics And Telecommunications Research Institute | Phase shifter and control method thereof |
| US10566952B1 (en) * | 2018-12-27 | 2020-02-18 | Industrial Technology Research Institute | Phase shifter with broadband and phase array module using the same |
| CN112865760A (en) * | 2019-11-28 | 2021-05-28 | 财团法人工业技术研究院 | Switching type phase shifter |
| CN111130488A (en) * | 2019-12-27 | 2020-05-08 | 中电国基南方集团有限公司 | Ultra-wideband phase-shifting circuit |
| CN114221639A (en) * | 2022-01-17 | 2022-03-22 | 苏州东山精密制造股份有限公司 | Multichannel selective digital phase shifter |
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| CN116248074B (en) | 2024-01-12 |
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