Cross gate waveguide polarizer based on phase compensation

Abstract

The invention discloses a cross gate waveguide polarizer based on phase compensation, and relates to the field of microwaves and antennas. The reconfigurable polarizer solves the problem that an existing waveguide polarizer can only achieve conversion from linear polarization to left-handed or right-handed circular polarization and cannot achieve left-handed or right-handed elliptical polarization and conversion of any axial ratio. The waveguide polarizer comprises four paths of power division networks, a + 45-degree acceleration phase shifter and a-45-degree delay phase shifter; the input end of the four-path power divider is a linear polarization feed point port and is used for dividing an input linear polarization electromagnetic wave into four paths of electromagnetic waves with equal amplitude and two paths of opposite phases; + 45-degree acceleration phase shifters and-45-degree delay phase shifters are alternately integrated on four paths of the four-path power division network and are used for respectively performing phase compensation on four paths of constant-amplitude electromagnetic signals; a continuous 90-degree phase difference is formed; the electromagnetic signals are coupled through the cross gate junction to form electromagnetic waves in the left-handed or right-handed circular polarizer, the low axial ratio is kept in a broadband, and the antenna is also suitable for the field of satellite communication.

Description

Technical Field

[0001] The invention relates to the technical field of microwaves and antennas, and in particular to a cross-gate waveguide polarizer based on phase compensation. Background Art

[0002] Millimeter waves refer to electromagnetic waves with a frequency range of 30 to 300 GHz (wavelength of 10 to 1 mm), of which the 100 to 300 GHz part belongs to the sub-terahertz frequency band. Millimeter wave / sub-terahertz electromagnetic waves have available spectrum resources; wide bandwidth, capable of high-speed transmission; short wavelength, easy to achieve high gain, can support high-precision positioning and high-resolution imaging. Millimeter wave / sub-terahertz technology has very broad application prospects in the fields of wireless communications, imaging, measurement, Internet of Things and security.

[0003] Circularly polarized electromagnetic waves refer to the electric field magnitude that remains unchanged when the angle between the polarization plane of the electromagnetic wave and the normal plane of the earth changes periodically from 0 to 360°, and the direction changes with time. The trajectory of the end of the electric field vector is projected as a circle on a plane perpendicular to the propagation direction. Circularly polarized electromagnetic waves have stable signal strength, strong anti-interference ability, strong adaptability, reduced multipath interference, and can reduce reflection and penetration losses during transmission.

[0004] Waveguide polarizers are an important type of microwave / millimeter wave passive device that converts input linearly polarized electromagnetic waves into circularly polarized electromagnetic waves. They are widely used in satellite communications and radar systems. Important indicators for measuring waveguide polarizers include reflection loss, insertion loss, and axial ratio. Whether the building blocks of the polarizer are strong determines its manufacturing and assembly difficulty, and also determines whether it is suitable for high-frequency millimeter wave / sub-terahertz bands. Conventional waveguide polarizers are based on baffle structures or 90° differential phase shifters. Polarizers based on baffle structures have problems such as limited bandwidth, large reflection loss, thin structure, and difficulty in manufacturing in high-frequency millimeter wave / sub-terahertz bands. Polarizers based on 90° differential phase shifters require phase shifters with a large radial length to meet low axial ratio performance, and a large length is not conducive to low-profile equipment.

[0005] Therefore, the waveguide polarizers proposed in the prior art can usually only realize the conversion between linear polarization and left-hand or right-hand circular polarization, and there is no reconfigurable polarizer solution that can realize the conversion between linear polarization and linear polarization, left-hand or right-hand elliptical polarization with arbitrary axis ratio, and left-hand or right-hand circular polarization. Summary of the invention

[0006] In order to solve the problem that the waveguide polarizers proposed in the prior art can usually only realize the conversion between linear polarization and left-hand or right-hand circular polarization, there is no reconfigurable polarizer solution that can realize the conversion between linear polarization and linear polarization, left-hand or right-hand elliptical polarization of arbitrary axis ratio and left-hand or right-hand circular polarization.

[0007] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] Solution 1: The present invention proposes a cross-gate waveguide polarizer based on phase compensation, wherein the cross-gate waveguide polarizer includes a 4-way power division network, a +45° accelerating phase shifter, a -45° delay phase shifter, and a gap waveguide building module;

[0009] The input end of the 4-way power divider is a linear polarization feed point port, which is used to divide the input linear polarization electromagnetic wave into four electromagnetic waves of equal amplitude and two inverted phases;

[0010] The +45° accelerating phase shifter and the -45° delay phase shifter are alternately integrated on the four paths of the 4-way power division network, and are used to perform phase compensation on the above four equal-amplitude electromagnetic signals respectively; so that the four equal-amplitude electromagnetic signals have a continuous 90° phase difference after phase compensation;

[0011] The four-way equal-amplitude electromagnetic signal and the gap waveguide building module are coupled through a cross-gate junction to form a left-handed electromagnetic wave or a right-handed electromagnetic wave, and a low axial ratio is maintained in a wide frequency band, thereby realizing a reconfigurable polarizer for converting from linear polarization to linear polarization, left-handed or right-handed elliptical polarization of arbitrary axial ratio, and left-handed or right-handed circular polarization.

[0012] Furthermore, a preferred embodiment is provided, wherein the +45° accelerating phase shifter is implemented by a +45° inductive phase shifter based on a width narrowing waveguide structure, and the -45° delay phase shifter is implemented by a -45° capacitive phase shifter based on a corrugated waveguide structure.

[0013] Furthermore, a preferred embodiment is provided, wherein the +45° accelerating phase shifter further comprises a cascade connection of two +22.5° accelerating phase shifters, and the -45° delay phase shifter further comprises a cascade connection of two -22.5° delay phase shifters.

[0014] Furthermore, a preferred embodiment is provided, wherein the +45° accelerating phase shifter and the -45° delaying phase shifter are also implemented by a phase shifter based on a widened waveguide and a phase shifter based on an iris.

[0015] Furthermore, a preferred embodiment is provided, wherein the waveguide structure is also implemented by a metal cavity waveguide, a gap waveguide, or a dielectric integrated waveguide.

[0016] Furthermore, a preferred embodiment is provided, wherein the four equal-amplitude electromagnetic signals have a continuous 90° phase difference and consistent direction after phase compensation.

[0017] Furthermore, a preferred embodiment is provided, wherein the performance indicators of the cross-gate waveguide polarizer include operating frequency band, reflection coefficient and low axial ratio.

[0018] Furthermore, a preferred embodiment is provided, wherein the operating frequency band of the cross-gate waveguide polarizer is 75-110 GHz.

[0019] Furthermore, a preferred embodiment is provided, in which the electromagnetic waves in a left-hand circular polarizer or the electromagnetic waves in a right-hand circular polarizer maintain a low axial ratio of less than 1 dB in a wide frequency band.

[0020] Furthermore, a preferred embodiment is provided, wherein the reflection coefficient is less than -25 dB.

[0021] The present invention is beneficial in that:

[0022] The cross-gate waveguide polarizer based on phase compensation described in the present invention solves the problem that the waveguide polarizers proposed in the prior art are difficult to achieve low axial ratio performance within a wide bandwidth. The cross-gate waveguide polarizer based on phase compensation described in the present invention uses a hybrid capacitive and inductive phase shifter to perform precise phase compensation within a wide bandwidth, thereby achieving a left-right circular polarization axial ratio index of less than 1 dB within a relative bandwidth of about 40%.

[0023] The cross-gate waveguide polarizer based on phase compensation described in the present invention also has a low profile characteristic, and the radial length of the polarization conversion part is less than 1 times the wavelength of the central frequency of the working frequency band.

[0024] The cross-gate waveguide polarizer based on phase compensation described in the present invention uses a gap waveguide structure and has the ability to suppress electromagnetic energy leakage, thus having better processing and assembly tolerance.

[0025] Compared with the waveguide polarizers proposed in the prior art, the cross-gate waveguide polarizer based on phase compensation described in the present invention can usually only realize the conversion between linear polarization and left-hand or right-hand circular polarization, and there is no reconfigurable polarizer solution that can realize the conversion between linear polarization and linear polarization, left-hand or right-hand elliptical polarization of any axis ratio and left-hand or right-hand circular polarization. The present application can realize the reconfigurable polarizer solution that can realize the conversion between linear polarization and linear polarization, left-hand or right-hand elliptical polarization of any axis ratio and left-hand or right-hand circular polarization.

[0026] The present invention is also applicable to high-frequency millimeter wave or sub-terahertz frequency band application fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural block diagram of the phase shifter in the cross-gate waveguide polarizer based on phase compensation described in implementation mode 1.

[0028] Figure 2 This is a structural block diagram of the left-hand circular polarizer in the cross-gate waveguide polarizer based on phase compensation described in embodiment 11.

[0029] Figure 3 This is a structural block diagram of the right-hand circular polarizer in the cross-gate waveguide polarizer based on phase compensation described in embodiment 11.

[0030] Figure 4 This is a schematic structural diagram of the right-hand circularly polarized cross-gate gap waveguide polarizer described in embodiment eleven.

[0031] Figure 5 Schematic diagram of the building blocks of a right-hand circularly polarized cross-gate gap waveguide polarizer.

[0032] Figure 5 , (a) is a top view of the lower module, (b) is a top view of the middle module, (c) is a top view of the lower module, and (d) is a top view of the lower module.

[0033] Figure 6 Schematic diagram of the structural explosion of the right-hand circularly polarized cross-gate gap waveguide polarizer.

[0034] Figure 7 This is a structural block diagram of the polarization reconfigurable cross-gate waveguide polarizer based on phase compensation described in embodiment 11.

[0035] Figure 8 Schematic diagram of the structure of the reconfigurable cross-gate gap waveguide polarizer.

[0036] Fig. 9 Schematic diagram of the building blocks of the reconfigurable cross-gate gap waveguide polarimeter.

[0037] Fig. 9 , (a) is a top view of the lower module, (b) is a top view of the middle module, (c) is a top view of the lower module, and (d) is a top view of the lower module.

[0038] Fig.10 Schematic diagram of the structural explosion of the reconfigurable cross-gate gap waveguide polarizer.

[0039] In the figure, 1 is a cross-gate junction, 2 is a +22.5° phase shifter, 3 is a -22.5° phase shifter, 4 is a waveguide layer transition, 5 is an E-plane power divider, and 6 is an H-plane power divider. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the implementation methods of the present application clearer, the technical solutions in the implementation methods of the present application will be clearly and completely described below in conjunction with the drawings in the implementation methods of the present application. Obviously, the described implementation methods are only part of the implementation methods of the present application, not all of the implementation methods.

[0041] Embodiment 1: This embodiment provides a cross-gate waveguide polarizer based on phase compensation, wherein the cross-gate waveguide polarizer includes a 4-way power division network, a +45° accelerating phase shifter, a -45° delay phase shifter, and a gap waveguide building module;

[0042] The input end of the 4-way power divider is a linear polarization feed point port, which is used to divide the input linear polarization electromagnetic wave into four electromagnetic waves of equal amplitude and two inverted phases;

[0043] The +45° accelerating phase shifter and the -45° delay phase shifter are alternately integrated on the four paths of the 4-way power division network, and are used to perform phase compensation on the above four equal-amplitude electromagnetic signals respectively; so that the four equal-amplitude electromagnetic signals have a continuous 90° phase difference after phase compensation;

[0044] The four-way equal-amplitude electromagnetic signal and the gap waveguide building module are coupled through a cross-gate junction to form a left-handed electromagnetic wave or a right-handed electromagnetic wave, and a low axial ratio is maintained in a wide frequency band, thereby realizing a reconfigurable polarizer for converting from linear polarization to linear polarization, left-handed or right-handed elliptical polarization of arbitrary axial ratio, and left-handed or right-handed circular polarization.

[0045] Embodiment 2. This embodiment further limits the cross-gate waveguide polarizer based on phase compensation described in embodiment 1. The +45° acceleration phase shifter is implemented by a +45° inductive phase shifter based on a width narrowing waveguide structure, and the -45° delay phase shifter is implemented by a -45° capacitive phase shifter based on a corrugated waveguide structure.

[0046] Embodiment 3. This embodiment further limits the cross-gate waveguide polarizer based on phase compensation described in embodiment 1. The +45° accelerating phase shifter also includes a cascaded implementation of two +22.5° accelerating phase shifters, and the -45° delayed phase shifter also includes a cascaded implementation of two -22.5° delayed phase shifters.

[0047] Embodiment 4: This embodiment further limits the cross-gate waveguide polarizer based on phase compensation in embodiment 2, and the +45° accelerating phase shifter and -45° delaying phase shifter are also implemented by a phase shifter based on a widened waveguide and a phase shifter based on an iris.

[0048] Embodiment 5: This embodiment further limits the cross-gate waveguide polarizer based on phase compensation described in Embodiment 2, and the waveguide structure also includes being realized by a metal cavity waveguide, a gap waveguide, and a dielectric integrated waveguide.

[0049] Embodiment 6: This embodiment further limits the cross-gate waveguide polarizer based on phase compensation described in Embodiment 1. The four equal-amplitude electromagnetic signals have a continuous 90° phase difference and consistent direction after phase compensation.

[0050] Embodiment 7: This embodiment further limits the cross-gate waveguide polarizer based on phase compensation described in Embodiment 1. The performance indicators of the cross-gate waveguide polarizer include operating frequency band, reflection coefficient and low axial ratio.

[0051] Embodiment 8: This embodiment further limits the cross-gate waveguide polarizer based on phase compensation described in Embodiment 7, and the operating frequency band of the cross-gate waveguide polarizer is 75-110 GHz.

[0052] Embodiment 9. This embodiment is a further limitation of the cross-gate waveguide polarizer based on phase compensation described in embodiment 7. The electromagnetic waves in the left-hand circular polarizer or the electromagnetic waves in the right-hand circular polarizer maintain a low axial ratio of less than 1 dB in a wide band.

[0053] Embodiment 10: This embodiment further limits the cross-gate waveguide polarizer based on phase compensation described in Embodiment 7, and the reflection coefficient is less than -25 dB.

[0054] Implementation eleven: This implementation provides an example, which is used to explain the above implementations one to eight. The specific example is as follows:

[0055] See also Figures 1 to 10 To illustrate this embodiment, this embodiment provides two specific practical solutions of the cross-gate polarizer.

[0056] The first is a phase-compensated cross-gate waveguide left-hand circular polarizer and a phase-compensated cross-gate waveguide right-hand circular polarizer. Figure 2 and Figure 3 As shown. The components used include an E-plane power divider, two H-plane power dividers, four +22.5° phase shifters, four -22.5° phase shifters, four waveguide layer transitions and a cross-gate junction. Their functions are to achieve wideband, with a relative bandwidth of about 40%, the conversion of the linear polarization TE10 mode to the circular polarization TE11 mode, and the working frequency band is the W band.

[0057] Taking the right-hand circular polarizer as an example, its structure is as follows Figure 4 As shown in the figure. The proposed phase-compensated cross-gate waveguide right-hand circular polarizer is based on a gap waveguide, and all components are integrated in a three-layer gap waveguide building block. 1 represents the cross-gate junction, and 2 represents the input linearly polarized rectangular waveguide TE10 mode electromagnetic signal is divided into two TE10 modes of equal amplitude and opposite direction (i.e., the phase difference is 180°) by the E-plane power divider.

[0058] The two TE10 modes with equal amplitude and opposite phases are divided into four TE10 modes with equal amplitude and opposite phases through H-plane power dividers. The two signals output by one H-plane are in phase, and they are opposite phases to the signal output by the other H-plane.

[0059] The above four equal-amplitude and two-way inverse-phase TE10 modes are respectively passed through Figure 3 The distributed phase compensation shown forms four TE10 modes with equal amplitude and continuous +90° phase difference in the counterclockwise direction.

[0060] The four TE10 modes with equal amplitude and continuous +90° phase difference enter the output cross-gate junction, couple to form a right-hand circular polarization mode, and output a right-hand circular polarization circular waveguide TE11 mode electromagnetic wave.

[0061] The performance indicators of the phase-compensated cross-gate waveguide right-hand circular polarizer include: operating frequency band: 72-113 GHz, relative bandwidth of 44.3%, reflection coefficient lower than -20 dB, and axial ratio lower than 1.5 dB.

[0062] Among them, the left-hand circular polarizer can be realized by replacing the positions of the accelerating phase shifter and the decelerating phase shifter in the right-hand circular polarizer.

[0063] The second is a polarization reconfigurable cross-gate waveguide polarizer based on phase compensation, the block diagram of which is shown in Figure 5 As shown. The proposed phase-compensated polarization reconfigurable cross-gate waveguide polarizer is based on a gap waveguide and consists of three layers of gap waveguide building blocks, where the components used include four +22.5° phase shifters, four -22.5° phase shifters, four waveguide interlayer transitions, and two cross-gate junctions. Its function is to realize the conversion between the linearly polarized TE11 mode in a wide band (relative bandwidth is about 40%) to vertical / horizontal linear polarized TE11, elliptical left / right circularly polarized TE11 and left / right circularly polarized TE11 modes with arbitrary axis ratios. The way to switch between different modes is to rotate the polarization angle of the input linearly polarized TE11 mode, and the working frequency band is the W band.

[0064] Its structure is as Figure 6 The proposed phase-compensated cross-gate polarization reconfigurable waveguide polarimeter uses a gap waveguide transmission line, and all components are integrated in a three-layer gap waveguide building block.

[0065] TE10 mode or four-way equal-amplitude / non-equal-amplitude TE10 modes with opposite directions. The polarization angle of the input linearly polarized circular waveguide TE11 mode electromagnetic signal is θ, such as Figure 4When θ=0° / 90° / 180° / 270°, the linearly polarized circular waveguide TE11 mode is divided into two reverse TE10 modes. When θ=45° / 135° / 225° / 315°, the linearly polarized circular waveguide TE11 mode is divided into four pairs of reverse equal-amplitude TE10 modes. When 0<θ<45° / 45<θ<90° / 90<θ<135° / 135<θ<180° / 180<θ<225° / 225<θ<270° / 270°<θ<315° / 315°<θ<360°, the polarized circular waveguide TE11 mode is divided into four pairs of reverse unequal-amplitude TE10 modes.

[0066] When θ = 0° / 180°, the two equal-amplitude reverse TE10 modes in the input cross-gate junction pass through Figure 5 The phase compensation of the distribution shown still forms two equal-amplitude opposite-direction TE10 modes, which enter the output cross-gate junction and couple to form a horizontal linear polarization TE11 mode.

[0067] When θ = 90° / 270°, the two equal-amplitude reverse TE10 modes in the input cross-gate junction pass through Figure 5 The phase compensation of the distribution shown still forms two equal-amplitude opposite-direction TE10 modes, which enter the output cross-gate junction and couple to form a vertical linear polarization TE11 mode.

[0068] When θ = 45° / 225°, the four equal-amplitude, two-by-two, opposite-direction TE10 modes in the input cross-gate junction are respectively transmitted as follows: Figure 5 The distributed phase compensation shown forms four TE10 modes with a continuous +90° phase difference in the counterclockwise direction, which enter the output cross-gate junction and couple to form a left-handed circularly polarized TE11 mode.

[0069] When θ = 135° / 315°, the four equal-amplitude, two-by-two, opposite-direction TE10 modes in the input cross-gate junction are respectively transmitted as follows: Figure 5 The distributed phase compensation shown forms four TE10 modes with a continuous +90° phase difference in the clockwise direction, which enter the output cross-gate junction and couple to form a right-hand circularly polarized TE11 mode.

[0070] When 0<θ<45° / 45<θ<90° / 180<θ<225° / 225<θ<270°, the four non-equal amplitude, pairwise, reverse TE10 modes in the input cross-gate junction are respectively transmitted as follows: Figure 5 The phase compensation of the distribution shown forms four TE10 modes with unequal amplitudes and continuous +90° phase difference in the counterclockwise direction, which enter the output cross-gate junction and couple to form left-handed elliptically polarized TE11 mode, and the axial ratio is controlled by different polarization angles θ.

[0071] When 90<θ<135° / 135<θ<180° / 270<θ<315° / 315<θ<360°, the four non-equal amplitude, pairwise, reverse TE10 modes in the input cross-gate junction are respectively transmitted as follows: Figure 5 The phase compensation of the distribution shown forms four TE10 modes with unequal amplitudes and continuous +90° phase difference in the clockwise direction, which enter the output cross-gate junction and couple to form a right-handed elliptically polarized TE11 mode, and the axial ratio is controlled by different polarization angles θ.

[0072] The performance indicators of the phase-compensated cross-gate polarization reconfigurable waveguide polarizer include: operating frequency band: 75-110 GHz (relative bandwidth is 37.8%), reflection coefficient lower than -25 dB, and axial ratio of left / right circular polarization mode lower than 1 dB.

[0073] Those skilled in the art will appreciate that the above are only preferred embodiments of the present invention, and the various embodiments of the present disclosure and / or the features described in the claims may be combined or combined in various ways, even if such combinations or combinations are not explicitly described in the present disclosure. It is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or perform equivalent substitutions on some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

[0074] Although preferred embodiments of the present invention have been described, additional changes and modifications may be made to these embodiments by those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A cross-gate waveguide polarizer based on phase compensation, characterized in that: The cross-gate waveguide polarizer includes a 4-way power division network, a +45° accelerating phase shifter, a -45° delay phase shifter, and a gap waveguide building module; The input end of the 4-way power divider is a linear polarization feed point port, which is used to divide the input linear polarization electromagnetic wave into four electromagnetic waves of equal amplitude and two inverted phases; The +45° accelerating phase shifter and the -45° delay phase shifter are alternately integrated on the four paths of the 4-way power division network, and are used to perform phase compensation on the above four equal-amplitude electromagnetic signals respectively; so that the four equal-amplitude electromagnetic signals have a continuous 90° phase difference after phase compensation; The four-way equal-amplitude electromagnetic signal and the gap waveguide building module are coupled through a cross-gate junction to form a left-handed electromagnetic wave or a right-handed electromagnetic wave, and a low axial ratio is maintained in a wide frequency band, thereby realizing a reconfigurable polarizer for converting from linear polarization to linear polarization, left-handed or right-handed elliptical polarization of arbitrary axial ratio, and left-handed or right-handed circular polarization.

2. The cross-gate waveguide polarizer based on phase compensation according to claim 1, characterized in that: The +45° accelerating phase shifter is implemented by a +45° inductive phase shifter based on a width narrowing waveguide structure, and the -45° delay phase shifter is implemented by a -45° capacitive phase shifter based on a corrugated waveguide structure.

3. The cross-gate waveguide polarizer based on phase compensation according to claim 1, characterized in that: The +45° accelerating phase shifter also includes a cascade connection of two +22.5° accelerating phase shifters, and the -45° delayed phase shifter also includes a cascade connection of two -22.5° delayed phase shifters.

4. The cross-gate waveguide polarizer based on phase compensation according to claim 2, characterized in that: The +45° accelerating phase shifter and the -45° delaying phase shifter are also implemented by a phase shifter based on a widened waveguide and a phase shifter based on an iris.

5. The cross-gate waveguide polarizer based on phase compensation according to claim 2, characterized in that: The waveguide structure also includes being realized by a metal cavity waveguide, a gap waveguide, and a dielectric integrated waveguide.

6. The cross-gate waveguide polarizer based on phase compensation according to claim 2, characterized in that: The four equal-amplitude electromagnetic signals have a continuous 90° phase difference and consistent directions after phase compensation.

7. The cross-gate waveguide polarizer based on phase compensation according to claim 1, characterized in that: The performance indicators of the cross-gate waveguide polarizer include operating frequency band, reflection coefficient and low axial ratio.

8. The cross-gate waveguide polarizer based on phase compensation according to claim 7, characterized in that: The cross-gate waveguide polarizer has an operating frequency band of 75-110 GHz.

9. The cross-gate waveguide polarizer based on phase compensation according to claim 8, characterized in that: The electromagnetic waves in the left-hand circular polarizer or the electromagnetic waves in the right-hand circular polarizer, and maintain a low axial ratio of less than 1dB in a wide band.

10. The cross-gate waveguide polarizer based on phase compensation according to claim 8, characterized in that: The reflection coefficient is less than -25dB.

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