Polarization conversion unit and reconfigurable polarization converter

Abstract

The invention provides a polarization conversion unit and a reconfigurable polarization converter, and belongs to the technical field of microwave propagation, the polarization conversion unit comprises a top-layer metal covering surface, an intermediate-layer dielectric substrate and a bottom-layer metal covering surface, and the top-layer metal covering surface and the bottom-layer metal covering surface have the same structure; the top-layer metal covering surface is positioned on the upper surface of the middle-layer dielectric substrate, and the bottom-layer metal covering surface is positioned on the lower surface of the middle-layer dielectric substrate; the top metal covering surface comprises a first metal patch and a second metal patch which are orthogonal to each other; the first metal patch and the second metal patch are respectively provided with a plurality of PIN diodes. The first metal patch and the second metal patch which are orthogonal to each other form a cross-bar-shaped anisotropic structure, and can serve as a metal bias line when the PIN diode is in a conduction state, so that the polarization conversion unit has the functions of regulating and controlling electromagnetic waves and the PIN diode at the same time, the metal bias line does not need to be independently arranged for the PIN diode, and the cost is reduced. And the structure of the polarization conversion unit is simplified.

Description

Technical Field

[0001] The present invention belongs to the technical field of microwave propagation, and particularly relates to a polarization conversion unit and a reconfigurable polarization converter. Background Art

[0002] With the wide application of wireless information systems such as communication, radar, and navigation in modern society, wireless information devices have higher and higher requirements for polarization matching during electromagnetic wave transmission and reception. Traditional polarization control technologies generally use ferrite as the basic material, which has problems such as large volume and weight, poor control performance, single polarization form, and the need for an external magnetic field, seriously restricting the wide application of polarization control technologies.

[0003] In order to effectively control the amplitude and phase of electromagnetic waves and achieve functions such as polarization deflection, absorption, and focusing of electromagnetic waves, some researchers have provided an artificially designed planar two-dimensional electromagnetic metasurface, which is usually composed of periodic or non-periodic arrangements of metal unit structures. The polarization conversion device based on the metasurface has advantages such as light weight, simple structure, low loss, and easy integration. However, most reflection or transmission type metasurface polarization conversion devices only have static functions and cannot meet the multi-polarization requirements of modern wireless communication systems.

[0004] Therefore, the present invention provides a polarization conversion unit and a reconfigurable polarization converter. Summary of the Invention

[0005] The present invention provides a polarization conversion unit and a reconfigurable polarization converter to at least solve the problem that most reflection or transmission type metasurface polarization conversion devices in the prior art only have static functions and cannot meet the multi-polarization requirements of modern wireless communication systems.

[0006] An embodiment of the present application provides a polarization conversion unit, which includes a top metal cladding, an intermediate dielectric substrate, and a bottom metal cladding, and the structures of the top metal cladding and the bottom metal cladding are the same; The top metal cladding is located on the upper surface of the intermediate dielectric substrate, and the bottom metal cladding is located on the lower surface of the intermediate dielectric substrate; The top metal cladding includes a first metal patch and a second metal patch that are orthogonal to each other; A plurality of PIN diodes are provided on both the first metal patch and the second metal patch.

[0007] Further, 4 PIN diodes are evenly spaced on both the first metal patch and the second metal patch.

[0008] Further, the lengths, widths, and thicknesses of the first metal patch and the second metal patch are the same.

[0009] Further, the lengths and widths of the top metal cladding and the bottom metal cladding are both p1, where p1 = 21 mm; The thicknesses of the top metal cladding and the bottom metal cladding are t1, where t1 = 0.035 mm.

[0010] Further, the lengths of the first metal patch and the second metal patch are both p2, where p2 = p1 = 21 mm; The widths of the first metal patch and the second metal patch are both w1, where w1 = 1.9 mm; The thicknesses of the first metal patch and the second metal patch are both t2, where t2 = t1 = 0.035 mm.

[0011] Further, the widths of the PIN diodes are both w2, where w2 = w1 = 1.9 mm; The lengths of the PIN diodes are both wd, where w1 = 1 mm.

[0012] Further, the thickness of the intermediate dielectric substrate is h, where h = 0.2 mm.

[0013] Further, the first metal patch and the second metal patch are made of copper. The intermediate dielectric substrate is made of PI flexible material. The intermediate dielectric substrate made of PI flexible material has the characteristics of low profile and easy conformal.

[0014] Further, the dielectric constant of the intermediate dielectric substrate is 3.5 and the tangent of the loss angle is 0.004.

[0015] In a second aspect, a reconfigurable polarization converter is composed of a plurality of periodically arranged polarization conversion units as described in the above aspects. ; For the reconfigurable polarization converter, the first metal patches and the second metal patches of the plurality of polarization conversion units are interconnected; By controlling the voltage of the feeder line of the polarization converter, the working modes of the polarization conversion units are controlled. By controlling the voltage of the feeder line of the polarization converter, three working modes of linear polarization retention, linear polarization to left - hand circular polarization, and linear polarization to right - hand circular polarization can be achieved.

[0016] It can be seen from the above technical solutions that the present invention has the following advantages: In the polarization conversion unit provided by the present application, the polarization conversion unit is provided with a first metal patch and a second metal patch that are orthogonal to each other. The first metal patch and the second metal patch that are orthogonal to each other form a cross-shaped anisotropic structure, which can act as a metal bias line when the PIN diode is in the on state, enabling the polarization conversion unit to concurrently perform the functions of regulating electromagnetic waves and the PIN diode, eliminating the need to separately provide a metal bias line for the PIN diode and simplifying the structure of the polarization conversion unit.

[0017] In the reconfigurable polarization converter provided by the present application, that is, in the metal bias lines of the polarization conversion units are interconnected. When the polarization conversion units are periodically arranged to form a reconfigurable polarization converter, the metal bias lines of the polarization conversion units will be interconnected. Ultimately, by controlling the voltage of the feeder line located at the periphery of the reconfigurable polarization converter, the operating mode of the polarization conversion unit can be controlled. By controlling the voltage of the feeder line of the polarization converter, three operating modes, namely linear polarization retention, linear polarization to left-handed circular polarization, and linear polarization to right-handed circular polarization, can be achieved. That is, by controlling the on / off of the PIN diode, the operating frequency band of the present invention can be flexibly regulated, endowing the present invention with the function of frequency band reconfigurability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the polarization conversion unit.

[0020] Figure 2 It is a top view schematic diagram of the polarization conversion unit.

[0021] Figure 3 It is a front view schematic diagram of the polarization conversion unit.

[0022] Figure 4 It is a feeder line diagram of the reconfigurable polarization converter.

[0023] Figure 5 (a) and (b) are curve graphs of S parameters in the simulation of the reconfigurable polarization converter when the diodes in the y direction are turned on and the diodes in the x direction are turned off.

[0024] Figure 6 (a) and (b) are curve graphs of S parameters in the simulation of the reconfigurable polarization converter when the diodes in the x direction are turned on and the diodes in the y direction are turned off.

[0025] Figure 7 (a) and (b) are the curve graphs of S parameters in the case where the diodes in the x direction are turned off and the diodes in the y direction are turned off in the simulation of the reconfigurable polarization converter.

[0026] Description of the drawings: 1 - top metal cladding; 2 - intermediate dielectric substrate; 3 - bottom metal cladding; 4 - first metal patch; 5 - second metal patch; 6 - PIN diode. Detailed implementation manners

[0027] In the polarization conversion unit and the reconfigurable polarization converter to be described in detail below, various embodiments of the present disclosure will be described more comprehensively. The present disclosure can have various embodiments, and adjustments and changes can be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but the present disclosure should be understood to cover all adjustments, equivalents, and / or alternative solutions that fall within the spirit and scope of the various embodiments of the present disclosure.

[0028] Hereinafter, the term "comprising" or "may comprise" that can be used in various embodiments of the present disclosure indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. Further, as used in various embodiments of the present disclosure, the terms "comprising", "having" and their cognates are only intended to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing items, and should not be construed as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or the possibility of adding one or more features, numbers, steps, operations, elements, components, or combination of the foregoing items.

[0029] In various embodiments of the present disclosure, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the listed words. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0030] Expressions (such as "first", "second", etc.) used in various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of the present disclosure, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0031] It should be noted that: If it is described that one component is "connected" to another component, the first component can be directly connected to the second component, and a third component can be "connected" between the first component and the second component. Conversely, when one component is "directly connected" to another component, it can be understood that there is no third component between the first component and the second component.

[0032] The term "user" used in various embodiments of the present disclosure may refer to a person using an electronic device, which may be a monitoring person, or a testing person, or an operating person.

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] The embodiment of the present application provides a polarization conversion unit, which solves the technical problem that there is an urgent need for a polarization conversion unit that meets the structural requirements of simplification.

[0035] Combined with Figures 1 - 3 , the polarization conversion unit includes a top metal cladding 1, an intermediate dielectric substrate 2, and a bottom metal cladding 3, and the structures of the top metal cladding 1 and the bottom metal cladding 3 are the same.

[0036] The top metal cladding 1 is located on the upper surface of the intermediate dielectric substrate 2, and the bottom metal cladding 3 is located on the lower surface of the intermediate dielectric substrate 2.

[0037] The top metal cladding 1 includes a first metal patch 4 and a second metal patch 5 that are orthogonal to each other.

[0038] A plurality of PIN diodes 6 are provided on both the first metal patch 4 and the second metal patch 5. In this embodiment, the polarization conversion unit is provided with a first metal patch 4 and a second metal patch 5 that are orthogonal to each other. The first metal patch 4 and the second metal patch 5 that are orthogonal to each other form a cross-shaped anisotropic structure, enabling the polarization conversion unit to simultaneously take into account the functions of regulating electromagnetic waves and PIN diodes 6, and eliminating the need to separately provide a metal bias line for the PIN diodes 6, thus simplifying the structure of the polarization conversion unit.

[0039] In an exemplary embodiment, 4 PIN diodes 6 are equidistantly provided on both the first metal patch 4 and the second metal patch.

[0040] Combined with Figures 1 to 3, it can be seen that along the length direction of the first metal patch 4, i.e., the x-axis direction, 4 PIN diodes 6 are inserted at equal intervals. Along the length direction of the second metal patch 5, i.e., the y-axis direction, 4 PIN diodes 6 are also inserted at equal intervals. Each polarization conversion unit includes a total of 16 PIN diodes 6.

[0041] It should be noted that the lengths, widths, and thicknesses of the first metal patch 4 and the second metal patch 5 are the same.

[0042] According to another embodiment of the present invention, the lengths and widths of the top metal cladding 1 and the bottom metal cladding 3 are both p1, and p1 = 21 mm.

[0043] The thicknesses of the top metal cladding 1 and the bottom metal cladding 3 are t1, and t1 = 0.035 mm.

[0044] According to an embodiment of the present application, the lengths of the first metal patch 4 and the second metal patch 5 are both p2, and p2 = p1 = 21 mm.

[0045] The widths of the first metal patch 4 and the second metal patch 5 are both w1, and w1 = 1.9 mm.

[0046] The thicknesses of the first metal patch 4 and the second metal patch 5 are both t2, and t2 = t1 = 0.035 mm.

[0047] It should be further noted that the widths of the PIN diodes 6 are both w2, and w2 = w1 = 1.9 mm.

[0048] The lengths of the PIN diodes 6 are both wd, and w1 = 1 mm.

[0049] In one embodiment, the thickness of the intermediate dielectric substrate 2 is h, and h = 0.2 mm.

[0050] As an example, the first metal patch 4 and the second metal patch 5 are made of copper.

[0051] Furthermore, as a refinement and extension of the specific implementation manner of the above embodiment, in order to fully illustrate the specific implementation process in this embodiment, another polarization conversion unit is provided, and the intermediate dielectric substrate 2 is made of PI flexible material. In this embodiment, the intermediate dielectric substrate 2 made of PI flexible material has the characteristics of low profile and easy conformal.

[0052] Exemplarily, the profile height of the intermediate dielectric substrate 2 is only 0.0028 , where is the wavelength corresponding to the center frequency, and has the characteristics of broadband, miniaturization, easy conformal, etc.

[0053] In one embodiment, the dielectric constant of the intermediate layer dielectric substrate 2 is 3.5, and the tangent of the loss angle is 0.004.

[0054] The embodiment of the present application also provides a reconfigurable polarization converter, which solves the technical problem that there is an urgent need for a technology that meets the multi-polarization requirements of modern wireless communication systems.

[0055] A reconfigurable polarization converter, the reconfigurable polarization converter is composed of periodically arranged polarization conversion units as described in the above embodiments, wherein, ; and is a positive integer.

[0056] The first metal patches 4 and the second metal patches 5 of the polarization conversion units of the reconfigurable polarization converter are connected to each other, and by controlling the voltage of the feeder line of the polarization converter, the working mode of the polarization conversion unit is controlled.

[0057] The first metal patches 4 and the second metal patches 5 of the polarization conversion units of the reconfigurable polarization converter are connected to each other. In this embodiment, the first metal patch 4 and the second metal patch 5 can act as metal bias lines when the PIN diode 6 is in the conducting state, that is, the metal bias lines of the polarization conversion units of the reconfigurable polarization converter are connected to each other.

[0058] Specifically, in combination with Figure 4 , when the polarization conversion units are periodically arranged to form a reconfigurable polarization converter, the metal bias lines of the polarization conversion units will be connected to each other, and finally, by controlling the voltage of the feeder line located outside the reconfigurable polarization converter, the working mode of the polarization conversion unit can be controlled. By controlling the voltage of the feeder line of the polarization converter, three working modes of linear polarization retention, linear polarization to left-handed circular polarization, and linear polarization to right-handed circular polarization can be realized.

[0059] By controlling the voltage of the feeder line of the polarization converter, the working mode of the polarization conversion unit is controlled. In this embodiment, by controlling the voltage of the feeder line of the polarization converter, three working modes of linear polarization retention, linear polarization to left-handed circular polarization, and linear polarization to right-handed circular polarization can be realized.

[0060] A reconfigurable polarization converter provided by the present invention can convert an incident linearly polarized wave into three polarization states within a frequency band with a relative bandwidth of 20.67% (3.73 - 4.59 GHz) by controlling the bias voltage of the PIN diode 6. The three polarization states are: right-handed circularly polarized wave, left-handed circularly polarized wave, and linearly polarized wave maintained. By adjusting the working state of the PIN diode 6 on the top metal cladding 1, rapid switching between multiple polarization states within a relatively wide frequency band can be achieved. That is, by controlling the on / off of the PIN diode 6, the working frequency band of the present invention can be flexibly regulated, enabling the present invention to have a frequency band reconfigurable function, providing a promising approach for the practical application of multi-polarization electronic systems.

[0061] In the reconfigurable polarization converter provided in this application, that is, the metal bias lines of the polarization conversion units of the reconfigurable polarization converter are interconnected. When the polarization conversion units are periodically arranged to form a reconfigurable polarization converter, the metal bias lines of the polarization conversion units will be interconnected. Ultimately, by controlling the voltage of the feeder line on the periphery of the reconfigurable polarization converter, the working mode of the polarization conversion units can be controlled. By controlling the voltage of the feeder line of the polarization converter, three working modes of linearly polarized wave maintenance, linearly polarized wave to left-handed circularly polarized wave, and linearly polarized wave to right-handed circularly polarized wave can be achieved. That is, by controlling the on / off of the PIN diode 6, the working frequency band of the present invention can be flexibly regulated, enabling the present invention to have a frequency band reconfigurable function.

[0062] The technical effects of the present invention are further described below in combination with simulation experiments: The relationship between the working state of the PIN diode 6 and the function of the reconfigurable polarization converter of the present invention is shown in Table 1 below: Table 1

[0063] The present invention is modeled and simulated using the commercial simulation software CST2021. When the PIN diode 6 in the y-axis direction (the second metal patch 5) is turned on and the PIN diode 6 in the x-axis direction (the first metal patch 4) is turned off, the function of converting the u-polarized wave into a right-handed circularly polarized wave (linearly polarized wave to right-handed circularly polarized wave) is achieved. The transmission coefficient Txx of the x-axis component, the transmission coefficient Tyy of the y-axis component, and the phase difference curve between them of the reconfigurable polarization converter for the vertically incident u-polarized wave are as shown in Figure 5 (a); the transmission coefficient from linearly polarized wave to right-handed circularly polarized wave, the transmission coefficient from linearly polarized wave to left-handed circularly polarized wave, and the axial ratio curve are as shown in Figure 5 (b). From Figure 5From the simulation results, the frequency band with axial ratio less than 3 dB is 3.73 - 5.1 GHz (relative bandwidth is 31%), the frequency band with insertion loss less than 3 dB is 3 - 4.84 GHz, and the overlapping bandwidth is 3.37 - 4.84 GHz (relative bandwidth is 25.9%).

[0064] The invention is modeled and simulated by using the commercial simulation software CST2021. When the PIN diode 6 in the x-axis direction (the first metal patch 4) is turned on and the PIN diode 6 in the y-axis direction (the second metal patch 5) is turned off, the function of converting u-polarized wave to left-handed circularly polarized wave (linear polarization to left-handed circular polarization) is realized. The transmission coefficient Txx of the x-axis component, the transmission coefficient Tyy of the y-axis component and the phase difference curve between the two of the reconfigurable polarization converter for the u-polarized wave incident vertically are as Figure 6 shown in (a); the transmission coefficient from linear polarization to left-handed circular polarization, the transmission coefficient from linear polarization to right-handed circular polarization and the axial ratio curve are as Figure 6 shown in (b). From Figure 6 the simulation results, the frequency band with axial ratio less than 3 dB is 3.73 - 5.1 GHz (relative bandwidth is 31%), the frequency band with insertion loss less than 3 dB is 3 - 4.84 GHz, the overlapping bandwidth is 3.37 - 4.84 GHz (relative bandwidth is 25.9%), and the operating bandwidths of linear polarization to left-handed circular polarization and linear polarization to right-handed circular polarization are the same.

[0065] The invention is modeled and simulated by using the commercial simulation software CST2021. When the PIN diode 6 in the y-axis direction (the second metal patch 5) is turned off and the PIN diode 6 in the x-axis direction (the first metal patch 4) is turned off, the function of maintaining the u-polarized wave (linear polarization maintenance) is realized. The transmission coefficient Txx of the x-axis component, the transmission coefficient Tyy of the y-axis component and the phase difference curve between the two of the reconfigurable polarization converter for the u-polarized wave incident vertically are as Figure 7 shown in (a); the co-polarization, cross-polarization transmission coefficient and isolation curve are as Figure 7 shown in (b). From Figure 7 the simulation results, the isolation is greater than 20 dB in the frequency band of 3 - 5.5 GHz, and the insertion loss is less than 3 dB in the frequency band of 3 - 4.59 GHz.

[0066] In summary, compared with the prior art, the invention can realize three polarization states in the frequency band of 3.73 - 4.59 GHz (overlapping bandwidth is 20.67%) by controlling the on-off of the PIN diode under simple bias voltage control. At the same time, the invention adopts a flexible dielectric material, and the profile height is only 0.0028λ (where λ is the wavelength corresponding to the center frequency), with the characteristics of miniaturization and easy conformal shaping.

[0067] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0068] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of devices, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. Exemplarily, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0069] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed couplings or direct couplings or communication connections to each other can be indirect couplings or communication connections through some interfaces, devices, or units, and can also be electrical, mechanical, or other forms of connection.

[0070] In addition, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be employed. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the present invention.

[0071] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0072] For those of ordinary skill in the art, according to the teachings of the present invention, designing different forms of control circuits does not require creative labor. Changes, modifications, substitutions, and variations to the embodiments still fall within the protection scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A polarization conversion unit, characterized in that: The polarization conversion unit comprises a top metal coating (1), an intermediate dielectric substrate (2) and a bottom metal coating (3), wherein the top metal coating (1) and the bottom metal coating (3) have the same structure; The top metal coating (1) is located on the upper surface of the middle dielectric substrate (2), and the bottom metal coating (3) is located on the lower surface of the middle dielectric substrate (2); The top metal covering (1) comprises a first metal patch (4) and a second metal patch (5) which are orthogonal to each other; A plurality of PIN diodes (6) are provided on each of the first metal patch (4) and the second metal patch.

2. The polarization conversion unit according to claim 1, characterized in that Four PIN diodes (6) are arranged at equal intervals on the first metal patch (4) and the second metal patch.

3. The polarization conversion unit according to claim 1, characterized in that: The first metal patch (4) and the second metal patch (5) have the same length, width and thickness.

4. The polarization conversion unit according to claim 3, characterized in that: The length and width of the top metal covering (1) and the bottom metal covering (3) are both p1, p1=21 mm; The thickness of the top metal coating (1) and the bottom metal coating (3) is t1, t1=0.035 mm.

5. The polarization conversion unit according to claim 4, characterized in that: The lengths of the first metal patch (4) and the second metal patch (5) are both p2, where p2=p1=21 mm; The width of the first metal patch (4) and the second metal patch (5) are both w1, w1=1.9 mm; The thickness of the first metal patch (4) and the second metal patch (5) are both t2, where t2=t1=0.035 mm.

6. The polarization conversion unit according to claim 5, characterized in that: The width of the PIN diode (6) is w2, w2=w1=1.9 mm; The lengths of the PIN diodes (6) are both wd, w1=1 mm.

7. The polarization conversion unit according to claim 1, characterized in that: The thickness of the intermediate layer dielectric substrate (2) is h, where h=0.2 mm.

8. The polarization conversion unit according to claim 1, characterized in that: The first metal patch (4) and the second metal patch (5) are made of metal copper; The intermediate layer dielectric substrate (2) is made of PI flexible material.

9. The reconfigurable polarization converter according to claim 1, characterized in that: The dielectric constant of the intermediate layer dielectric substrate (2) is 3.5, and the loss tangent is 0.

004.

10. A reconfigurable polarization converter, characterized in that: The reconfigurable polarization converter consists of The device is composed of periodically arranged polarization conversion units as described in any one of claims 1 to 9, wherein: ; Reconfigurable polarization converter The first metal patch (4) and the second metal patch (5) of a polarization conversion unit are connected to each other; The operation mode of the polarization conversion unit is controlled by controlling the feeder voltage of the polarization converter.

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