CN217643309U - Phase shifter with ultrahigh phase-shifting resolution ratio of W-band - Google Patents
Phase shifter with ultrahigh phase-shifting resolution ratio of W-band Download PDFInfo
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- CN217643309U CN217643309U CN202220780165.5U CN202220780165U CN217643309U CN 217643309 U CN217643309 U CN 217643309U CN 202220780165 U CN202220780165 U CN 202220780165U CN 217643309 U CN217643309 U CN 217643309U
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Abstract
The utility model discloses a phase shifter of W wave band ultrahigh phase-shifting resolution, which comprises a reflective phase shifter, a digital controller containing a digital-to-analog converter and a constant phase VGA, wherein the reflective phase shifter is connected with a signal input end and is used for adjusting the phase of a signal; the digital controller containing the digital-to-analog converter is connected with the reflection type phase shifter and is used for reforming the reflection type phase shifter into a state that the phase is equidistant and adjustable; the constant phase VGA is connected with the output end of the reflection type phase shifter and is used for compensating the amplitude unbalance degree of the reflection type phase shifter. The utility model discloses move looks ware and realized for the first time that the W wave band surpasss 7bit phase-shifting resolution ratios, solved 2 big research and development bottlenecks that present W wave band moved looks ware: (1) the phase resolution is not high (less than 6 bit); (2) amplitude imbalance (> 5 dB).
Description
Technical Field
The invention relates to the technical field of phase shifters, in particular to a phase shifter with ultra-high phase-shifting resolution of a W wave band.
Background
The phase shifter may cause a specified change in the phase of the pass signal. The phase shifter applied to the microwave frequency band (300 MHz-110 GHz) mainly has the forms of a delay line, a high-low pass switch, vector synthesis and ferroelectric shift and the like. In recent years, various phase shifter designs have evolved in the frequency band below 60 GHz, and the related art is mature, but above 60 GHz, this is still a field to be mined and studied. Phase shifters with a phase shift resolution of more than 6 bits in the W band have not been reported. Although the reflective phase shifter can realize discrete equidistant phase change through the digital-to-analog converter DAC, the problem of unbalanced amplitude is faced, and due to the problems of complex system, great difficulty in realization technology and the like, no equidistant dispersive reflective phase shifter with high phase shift resolution (> 6 bits) of 94 GHz is reported so far.
Meanwhile, in order to overcome the above-mentioned problem of the imbalance of the phase shifter amplitude, a variable gain amplifier VGA is generally connected after the phase shifter. However, when the gain of the conventional VGA is changed, the phase of the conventional VGA is also changed, which is not favorable for accurately controlling the phase of the signal. To change this situation, there have been some studies starting to turn to a phase-invariant variable gain amplifier. However, no constant phase VGA design has been reported for the high frequency band of 94 GHz.
Disclosure of Invention
In view of the above, it is desirable to provide a phase shifter with ultra-high phase-shifting resolution in W-band.
In order to solve the technical problems, the invention adopts the following technical scheme:
a phase shifter with ultra-high phase-shifting resolution of a W wave band comprises a reflective phase shifter, a digital controller containing a digital-to-analog converter and a constant-phase VGA, wherein the reflective phase shifter is connected with a signal input end and used for adjusting the phase of a signal; the digital controller containing the digital-to-analog converter is connected with the reflection type phase shifter and is used for reforming the reflection type phase shifter into a state that the phase is equidistant and adjustable; the constant phase VGA is connected with the output end of the reflection type phase shifter and is used for compensating the amplitude unbalance degree of the reflection type phase shifter.
As a preferred embodiment of the phase shifter with ultra-high phase-shifting resolution in W-band provided by the present invention, the reflective phase shifter is a 360 ° reflective phase shifter.
As a preferred embodiment of the phase shifter with ultra-high phase shifting resolution in W-band provided by the present invention, the 360 ° reflective phase shifter includes 2 90 ° phase shifters and 1 180 ° phase-inversion selector connected in series in sequence.
As a preferred embodiment of the phase shifter with ultra-high phase-shifting resolution in W-band provided by the present invention, each 1 of the 90 ° phase shifters is a 90 ° coupler loaded with a capacitive load.
As a preferred embodiment of the phase shifter with ultra-high phase-shifting resolution in W-band provided by the present invention, the 90 ° coupler is a broadband 90 ° coupler.
As a preferred embodiment of the phase shifter with ultrahigh phase-shifting resolution in W-band provided by the present invention, the 90 ° coupler is a Lange coupler.
As a preferred embodiment of the phase shifter with ultra-high phase-shifting resolution in W-band provided by the present invention, the capacitive load is an equivalent capacitor formed by a capacitor or a triode.
As a preferred embodiment of the phase shifter with ultra-high phase-shifting resolution in W-band provided by the present invention, the 180 ° phase-inverting selector includes a relay and a 180 ° coupler connected to the relay.
As a preferred embodiment of the phase shifter with ultra-high phase-shifting resolution in W-band provided by the present invention, the digital controller with the digital-to-analog converter includes a controller and a high-resolution digital-to-analog converter, and the reflective phase shifter is connected to the controller through the high-resolution digital-to-analog converter.
As a preferred embodiment of the phase shifter with ultrahigh phase-shifting resolution in W-band provided by the present invention, the high-resolution digital-to-analog converter is a digital-to-analog converter with a resolution of 7 bits or more.
Compared with the prior art, the invention has the following beneficial effects:
compared with the existing phase shifter scheme, the phase shifter comprises a reflection-type phase shifter, a digital controller containing a digital-to-analog converter (DAC) and a constant-phase VGA, wherein the reflection-type phase shifter is connected with a signal input end and used for adjusting the phase of a signal; the digital controller containing the digital-to-analog converter is connected with the reflection type phase shifter and is used for reforming the reflection type phase shifter into a state that the phase is equidistant and adjustable; the phase-invariant VGA is connected with the output end of the reflection-type phase shifter and is used for compensating the amplitude unbalance of the reflection-type phase shifter, so that the phase shifter is designed to realize the phase shifting resolution of more than 7 bits of a W wave band for the first time, and 2 major research and development bottlenecks of the existing W wave band phase shifter are solved: (1) the phase resolution is not high (less than 6 bit); (2) amplitude imbalance (> 5 dB).
On one hand, the phase resolution of the phase shifter is not limited by the structure design of the phase shifter any more, but is mainly determined by the resolution of the DAC, and the design avoids the problem of insufficient resolution caused by the process, so that the phase shifter can utilize the DAC with high resolution, thereby realizing higher phase-shifting resolution, and the phase resolution of the phase shifter can exceed 7 bits or even be higher. The improvement of the phase resolution of the phase shifter is beneficial to improving the spatial resolution of the W-band radar.
On the other hand, the invention designs and integrates the constant phase VGA of the W wave band, so that the problem of amplitude imbalance inherent in the reflective phase shifter can be compensated. The VGA with the unchanged phase greatly reduces the beamforming debugging difficulty of the phased array antenna and is beneficial to the radiation side lobe suppression of the phased array antenna.
The invention has high novelty and great practical value.
Drawings
In order to illustrate the present application or prior art more clearly, a brief description of the drawings needed for the description of the embodiments or prior art will be given below, it being clear that the drawings in the following description are some embodiments of the present application and that other drawings can be derived from them by a person skilled in the art without inventive effort.
FIG. 1 is a schematic block diagram of a W-band ultra-high phase-shifting resolution phase shifter according to the present invention;
FIG. 2 is a schematic block diagram of a 360 degree phase-inverting shifter of the present invention;
FIG. 3 is a schematic block diagram of a 90 phase shifter of the present invention;
fig. 4 is a functional block diagram of the 180 deg. inverting selector of the present invention.
In the figure, 1-reflection type phase shifter, 11-90 degree phase shifter, 12-180 degree reverse phase selector, 121-relay, 122-180 degree coupler, 13-90 degree coupler, 131-first port, 132-second port, 133-third port, 134-fourth port, 14-variable capacitance module, 2-digital controller, 21-controller, 22-high resolution digital-to-analog converter and 3-invariable phase VGA.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1 to 4, the present embodiment provides a phase shifter with ultra-high phase-shifting resolution in W-band. Specifically, the phase shifter of the present embodiment includes a reflective phase shifter, a digital controller, and a constant phase VGA, wherein the reflective phase shifter is connected to a signal input end and is used for adjusting a signal phase; the digital controller comprises a controller and a high-resolution digital-to-analog converter, and the controller is connected with the reflective phase shifter through the high-resolution digital-to-analog converter and is used for modifying the reflective phase shifter into a phase with an equidistant and adjustable phase; the constant phase VGA is connected with the output end of the reflection type phase shifter and is used for compensating the amplitude unbalance degree of the reflection type phase shifter; the constant phase VGA is also connected with the signal output end and used for outputting signals after amplitude compensation.
The reflection type phase shifter is a 360-degree reflection type phase shifter. Furthermore, the 360-degree reflection-type phase shifter comprises 2 90-degree phase shifters, 1 180-degree phase reversal selector, and the 2 90-degree phase shifters and the 1 180-degree phase reversal selector are sequentially connected in series, so that the 360-degree phase reversal phase shifter can realize 180-degree phase shifting function through the 2 90-degree phase shifters, and then realize 360-degree full-range phase shifting coverage through the 1 180-degree phase reversal selector.
Wherein each 1 of the 90 ° phase shifters is a 90 ° coupler loaded with a capacitive load. Preferably, but not limitatively, the 90 ° coupler is a broadband 90 ° coupler, and may be specifically a Lange coupler or other structural coupler. The capacitive load can be a capacitor or an equivalent capacitor formed by a triode.
Preferably, each 1 of the 90 ° phase shifters includes: the device comprises a 90-degree coupler and two variable capacitance modules, wherein the 90-degree coupler is provided with a first port and a second port which are connected through a transmission line, and a third port and a fourth port which are connected through the transmission line, the first port serves as a signal input end, the second port is connected with one variable capacitance module, the third port serves as a signal output end, the fourth port is connected with the other variable capacitance module, and the two variable capacitance modules are respectively connected with a high-resolution digital-to-analog converter. Therefore, the control voltage signal output by the high-resolution digital-to-analog converter is received by the two variable capacitor modules and is used as the control signal of the variable capacitor, the control voltage signal is used for controlling the voltage change so as to change the size of the variable capacitor, and the amplitude phase of the signal is adjusted. Specifically, each variable capacitor module comprises a variable capacitor C1, a capacitor C2, a variable capacitor C3, a capacitor C4, a capacitor C5 and an inductor L1; capacitance C5 one end with second port or fourth port are connected, and the other end divide into three branch road, and first branch road is connected inductance L1 back ground connection, and the second branch road connects gradually variable capacitance C1 and electric capacity C2 back ground connection, and the third branch road connects gradually variable capacitance C3 and electric capacity C4 back ground connection, wherein variable capacitance C1 and variable capacitance C3 all through potentiometre VR1, VR2, VR3 and VR4 respectively with high resolution digital-to-analog converter connects, as shown in fig. 3, is convenient for high resolution digital-to-analog converter passes through the potentiometre and inputs control voltage respectively.
The 180 DEG reverse phase selector comprises a relay and a 180 DEG coupler connected with the relay. The input end of the relay is connected with the output end of one 90-degree phase shifter, the output end of the relay is respectively connected with two input ends of the 180-degree coupler, and the relay is used as a functional module for realizing a single-pole double-throw switch and can realize the shunting and selection of input signals; and the output end of the 180-degree coupler is connected with the input end of the constant-phase VGA.
In this embodiment, the constant phase VGA is understood to be a variable gain amplifier with output phase invariance.
In this embodiment, the high resolution digital-to-analog converter is a digital-to-analog converter with a resolution of 7 bits or more. The high-resolution digital-to-analog converter outputs a control voltage signal which is used as a control signal of the variable capacitor of the 360-degree reflection type phase shifter and is used for controlling the voltage change so as to change the size of the variable capacitor.
The specific implementation is that the working principle of the phase shifter is as follows: the controller controls the high-resolution digital-to-analog converter to output a control voltage signal to the 360-degree reflection type phase shifter according to a specified requirement, and after the signal is input to the 360-degree reflection type phase shifter, the 360-degree reflection type phase shifter generates a phase with the specified requirement. And when the phase changes, the amplitude also changes, and then the amplitude change of the change is corrected by the constant phase VGA to finally obtain an output signal with the phase change but the amplitude unchanged.
The phase shifter comprises a reflection-type phase shifter, a digital controller containing a digital-to-analog converter (DAC) and a constant-phase VGA, wherein the reflection-type phase shifter is connected with a signal input end and used for adjusting the phase of a signal; the digital controller containing the digital-to-analog converter is connected with the reflective phase shifter and is used for modifying the reflective phase shifter into a phase with an equidistant and adjustable phase; the phase-invariant VGA is connected with the output end of the reflection-type phase shifter and is used for compensating the amplitude imbalance degree of the reflection-type phase shifter, and the phase shifter is designed to realize the phase shifting resolution of more than 7 bits of the W wave band for the first time.
On one hand, the phase resolution of the phase shifter is not limited by the structure design of the phase shifter any more, but is mainly determined by the resolution of the DAC, and the design avoids the problem of insufficient resolution caused by the process, so that the phase shifter can utilize the DAC with high resolution, thereby realizing higher phase-shifting resolution, and the phase resolution of the phase shifter can exceed 7 bits or even be higher. The improvement of the phase resolution of the phase shifter is beneficial to improving the spatial resolution of the W-band radar.
On the other hand, the invention designs and integrates the constant phase VGA of the W wave band, so that the problem of amplitude imbalance inherent in the reflective phase shifter can be compensated. The VGA with the unchanged phase greatly reduces the beamforming debugging difficulty of the phased array antenna and is beneficial to the radiation side lobe suppression of the phased array antenna. The invention has great practical value.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields, and all the equivalent structures are within the protection scope of the present application.
Claims (10)
1. A phase shifter with ultra-high phase-shifting resolution of a W wave band is characterized by comprising a reflective phase shifter, a digital controller containing a digital-to-analog converter and a constant-phase VGA, wherein the reflective phase shifter is connected with a signal input end and is used for adjusting the phase of a signal; the digital controller containing the digital-to-analog converter is connected with the reflective phase shifter and is used for modifying the reflective phase shifter into a phase with an equidistant and adjustable phase; the constant phase VGA is connected with the output end of the reflection type phase shifter and is used for compensating the amplitude unbalance degree of the reflection type phase shifter.
2. The ultra-high phase shifting resolution phase shifter of claim 1, wherein the reflective phase shifter is a 360 ° reflective phase shifter.
3. The ultra-high phase shifting resolution phase shifter of claim 2, wherein the 360 ° reflective phase shifter comprises 2 90 ° phase shifters and 1 180 ° phase inversion selector connected in series in sequence.
4. The ultra-high phase-shifting resolution phase shifter of claim 3, wherein each 1 of said 90 ° phase shifters is a 90 ° coupler loaded with a capacitive load.
5. The ultra-high phase-shifting resolution phase shifter of claim 4, wherein the 90 ° coupler is a broadband 90 ° coupler.
6. The ultra-high phase-shifting resolution phase shifter of claim 5, wherein the 90 ° coupler is a Lange coupler.
7. The phase shifter of claim 4, wherein the capacitive load is a capacitor or an equivalent capacitor formed by a triode.
8. The ultra-high phase shifting resolution phase shifter of claim 3, wherein the 180 ° phase inverting selector comprises a relay and a 180 ° coupler connected to the relay.
9. The ultra-high phase shifting resolution phase shifter of claim 1, wherein the digital controller with digital-to-analog converter comprises a controller and a high resolution digital-to-analog converter, and the reflective phase shifter is connected to the controller through the high resolution digital-to-analog converter.
10. The W-band ultra-high phase-shifting resolution phase shifter of claim 9, wherein the high resolution digital-to-analog converter is a digital-to-analog converter with a resolution of 7 bits or more.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115865030A (en) * | 2022-12-19 | 2023-03-28 | 华南理工大学 | Miniaturized looks ware that moves of millimeter wave broadband |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115865030A (en) * | 2022-12-19 | 2023-03-28 | 华南理工大学 | Miniaturized looks ware that moves of millimeter wave broadband |
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