On-resistance reconfigurable surface for controlling radially polarized electromagnetic flyrings

Abstract

The invention discloses an on-resistance reconfigurable surface for controlling a radial polarization electromagnetic flying ring, and belongs to the technical field of electromagnetic metasurfaces. The antenna sequentially comprises a first dielectric substrate, a first metal patch, a second metal patch and a second dielectric substrate from top to bottom, wherein the first dielectric substrate and the second dielectric substrate are parallel to each other, and a gap is reserved between the first dielectric substrate and the second dielectric substrate; the first metal patch is of a 36-degree rotational symmetry structure and comprises three circular rings / circular ring groups, ten first inner side rectangular patch groups and ten first outer side rectangular patch groups; the second metal patch is of a (180 / 7)-degree rotational symmetry structure and comprises three circular rings / one circular ring group, two circular rings, fourteen second inner-side rectangular patch groups and fourteen second outer-side rectangular patch groups, and diodes are loaded on the rectangular patch groups respectively; unified control over on-off of the diodes is achieved through the biasing circuit. According to the invention, the on-resistance reconfiguration of the radially polarized electromagnetic flying ring is realized, the basic function of coding is realized, and the frequency application range is relatively large.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromagnetic metasurfaces, and in particular relates to a reconfigurable surface for controlling the flow resistance of radially polarized electromagnetic flying rings. Background Art

[0002] With the continuous development of the times in recent years, communication technology has become increasingly important in people's lives. This rapid development has led to an increasing demand for spectrum in wireless communication technologies. Given the limited spectrum available, multiplexing technologies, including both orthogonal and non-orthogonal multiplexing, have garnered widespread attention. The unique spectrum distribution of radially polarized electromagnetic flying rings during propagation makes this technology suitable for wireless communications in non-orthogonal environments, making it highly sought after.

[0003] The application of electromagnetic flying ring technology to non-orthogonal multiplexing currently has strong theoretical support, and researchers have proposed a complete electromagnetic flying ring communication process, from encoding and transmitting to receiving and decoding. The encoding process requires the use of a reconfigurable metasurface to achieve encoding in the desired frequency band. However, current reconfigurable metasurfaces suffer from two issues. First, most metasurfaces are not designed for radially polarized electromagnetic flying ring encoding, and second, their usable frequency band is relatively narrow. This design is necessary because the unique toroidal electric field of electromagnetic flying rings differs from conventional communication electromagnetic waves. To further enhance the implementation of electromagnetic flying ring technology, metasurfaces require structural modifications and tailoring to electromagnetic flying rings. Furthermore, to ensure that electromagnetic flying ring communication can be adapted to a wide range of scenarios and maintain a certain communication rate, reconfigurable metasurfaces must have a wide operating frequency band. Therefore, there is an urgent need for a reconfigurable metasurface that is appropriately sized, has a wide usable frequency band, and offers excellent pass-resistance control, specifically designed for electromagnetic flying rings. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a reconfigurable surface for controlling the resistance of radially polarized electromagnetic flying rings. The surface is designed for electromagnetic flying rings and solves the problem of narrow bandwidth of some metasurfaces used for encoding in the prior art.

[0005] The technical problem proposed by the present invention is solved as follows:

[0006] A reconfigurable surface unit for controlling the resistance of a radially polarized electromagnetic flying ring includes, from top to bottom, a first dielectric substrate 17, a first metal patch 18, a second metal patch 19, and a second dielectric substrate 20; the first metal patch 18 is located on the lower surface of the first dielectric substrate 17, the second metal patch 19 is located on the upper surface of the second dielectric substrate 20, and the first dielectric substrate 17 and the second dielectric substrate 20 are parallel and spaced apart.

[0007] The first metal patch 18 has a 36° rotationally symmetrical structure, including a first circular ring 1, a second circular ring group 2, a third circular ring 3, ten first inner rectangular patch groups 4, and ten first outer rectangular patch groups 5. The first circular ring 1, the second circular ring group 2, and the third circular ring 3 are cocentric and spaced from the outside to the inside, with the center located at the center of the lower surface of the first dielectric substrate 17. The first inner rectangular patch group 4 and the first outer rectangular patch group 5 are located in the same radial direction, and the central angle between adjacent first inner rectangular patch groups 4 and adjacent first outer rectangular patch groups 5 is 36°. The first inner rectangular patch group 4 and the first outer rectangular patch group 5 are each loaded with a diode.

[0008] The second metal patch 19 has a (180 / 7)° rotationally symmetrical structure, including a fourth circular ring, a fifth circular ring group, a sixth circular ring, fourteen second inner rectangular patch groups and fourteen second outer rectangular patch groups; the fourth circular ring, the fifth circular ring group and the sixth circular ring have the same structural dimensions as the first circular ring 1, the second circular ring group 2 and the third circular ring 3 of the first metal patch 18, respectively; the second inner rectangular patch group and the fourteen second outer rectangular patch groups are located in the same radial direction, and the central angles between adjacent second inner rectangular patch groups and adjacent second outer rectangular patch groups are all (180 / 7)°; the second inner rectangular patch group has the same structure as the first inner rectangular patch group 4, and the second outer rectangular patch group has the same structure as the first outer rectangular patch group 5;

[0009] The working state of the surface unit is controlled by controlling the on-off state of each diode.

[0010] Furthermore, both ends of the first inner rectangular patch group 4 extend to the second circular ring group 2 and the third circular ring 3 respectively, and include an inner first rectangular patch and an inner second rectangular patch distributed from the inside to the outside in the radial direction, with a gap left between the inner first rectangular patch and the inner second rectangular patch; a diode is loaded between the gap between the two rectangular patches of the first inner rectangular patch group 4, with the positive electrode of the diode connected to the inner second rectangular patch and the negative electrode connected to the inner first rectangular patch;

[0011] The two ends of the first outer rectangular patch group 5 extend to the first circular ring 1 and the second circular ring group 2 respectively, including an outer first rectangular patch and an outer second rectangular patch distributed from the inside to the outside in the radial direction, with a gap left between the outer first rectangular patch and the outer second rectangular patch; a diode is loaded between the gap between the two rectangular patches of the first outer rectangular patch group 5, the positive pole of the diode is connected to the outer first rectangular patch, and the negative pole is connected to the outer second rectangular patch.

[0012] Furthermore, in the first metal patch 18 and the second metal patch 19, the on-off states of the diodes loaded at the gaps in the first inner rectangular patch group 4, the first outer rectangular patch group 5, the second inner rectangular patch group and the second outer rectangular patch group are the same, which is used to achieve control of the on-off state of the electromagnetic flying ring.

[0013] Furthermore, the on / off state of each diode is controlled by a bias circuit. Any point in the first ring 1, the second ring group 2, and the third ring 3 is connected to the bias circuit on the upper surface of the first dielectric substrate 17 through a metal through-hole. Any point in the fourth ring, the fifth ring group, and the sixth ring is connected to the bias circuit on the lower surface of the second dielectric substrate 20 through a metal through-hole. The bias circuit includes three bias lines extending radially outward from the metal through-holes. The corresponding bias lines in the first ring 1, the third ring 3, the fourth ring, and the sixth ring are grounded, while the corresponding bias lines in the second ring group 2 and the fifth ring group are connected to an external power supply to achieve 10mA power supply.

[0014] Furthermore, the second ring group 2 and the fifth ring group can be presented in two structures. The first structure is an independent ring, and the second structure is two spaced rings. When the second ring group 2 and the fifth ring group are an inner ring and an outer ring that are spaced, any point in the inner ring and the outer ring reaches the other side of the dielectric substrate through a metal through-hole, and the bias line starts from the metal through-hole corresponding to the inner ring and extends radially outward through the metal through-hole corresponding to the outer ring.

[0015] Furthermore, the first dielectric substrate 17 and the second dielectric substrate 20 are in annular shape and are both made of F4B plate with a dielectric constant of 2.65, a loss tangent of 0.002, and a thickness of 2 mm.

[0016] Furthermore, the second circular ring group 2 is implemented using the first structure. The first circular ring 1 in the first implementation structure has an outer radius of 18.8mm and an inner radius of 18.495mm. The second circular ring group is a single independent circular ring with an outer radius of 14.175mm and an inner radius of 13.85mm. The third circular ring has an outer radius of 9.425mm and an inner radius of 9.2mm. The outer second rectangular patch of the first outer rectangular patch group 5 measures 2.12mm×0.5mm, the outer first rectangular patch of the first outer rectangular patch group 5 measures 2.17mm×0.5mm, and the inner first and inner second rectangular patches of the first inner rectangular patch group 4 both measure 2.16mm×0.5mm. The gap length in the first inner rectangular patch group 4 and the first outer rectangular patch group 5 is 0.33mm.

[0017] Furthermore, the second ring group 2 realizes the second structure through the second structure. Compared with the first structure, the inner ring and the outer ring of the second ring group are spaced apart and adjusted to the inner radius and outer radius of the inner ring are 13.825mm, and the outer radius and the outer radius are 13.98mm, and the inner radius and the outer radius of the outer ring are 14.02mm, and the outer radius and the outer radius are 14.175mm respectively. The size of the outer first rectangular patch of the first outer rectangular patch group 5 is set to 2.08mm×0.5mm, and the size of the inner second rectangular patch of the first inner rectangular patch group 4 is set to 2.09mm×0.5mm. The other structural dimensions are the same as the first structure.

[0018] The present invention also provides a reconfigurable surface for controlling the resistance of radially polarized electromagnetic flying rings, comprising N surface units mentioned above, each surface unit being located in the same plane and having a common center, where N is a positive integer greater than or equal to 1.

[0019] The beneficial effects of the present invention are:

[0020] The surface unit described in the present invention is equipped with a diode, and the on-off state of the diode corresponds to two different working states of the electromagnetic metasurface unit. There is a large difference in the electromagnetic waves passing through the two different working states, thereby realizing the encoding function; in the present invention, the on-off state of the diode is controlled by the bias circuit, and the on-off state of all diodes on the surface unit is uniformly controlled by the bias circuit.

[0021] The first structure of the surface unit described in the present invention can achieve good working effects near 5-9Ghz and 10-12Ghz, and there is a significant difference between the two working states; the second structure has a better working effect near 6-10Ghz and 10.5 to 12Ghz; the surface described in the present invention can achieve the encoding function by changing the state of the radial electromagnetic flying ring after passing through by changing the diode state of the entire metasurface; the present invention can achieve encoding control of larger electromagnetic flying ring sizes by changing the inner and outer radii. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the three-dimensional structure of the resistance reconfigurable surface unit of the present invention;

[0023] Figure 2 (a) is a schematic diagram of the structure of the first metal patch in the resistance reconfigurable surface unit of the present invention, Figure 2 (b) is a schematic diagram of the structure of the second metal patch in the resistance reconfigurable surface unit of the present invention;

[0024] Figure 3 A side view of the resistance reconfigurable surface unit according to the present invention;

[0025] Figure 4A partial detail diagram of the second and fifth circular ring groups in the surface unit of the present invention implemented by the first structure;

[0026] Figure 5 A partial detail diagram of the second and fifth circular ring groups in the surface unit of the present invention implemented by the second structure;

[0027] Figure 6 This is a curve diagram of the absolute value of the difference in S21 coefficient under two working states when the surface unit of the first structure uses a coaxial line to generate a toroidal electric field in the embodiment;

[0028] Figure 7 This is a curve diagram of the absolute value of the difference in S21 coefficient under two working states when the second structural surface unit of the embodiment uses a coaxial line to generate a toroidal electric field;

[0029] Figure 8 Schematic diagram of the bias circuit of the first structural surface in the embodiment;

[0030] Figure 9 These are S11 curves of different states of 3-bit encoding when the three-unit on-off reconfigurable surface described in the embodiment uses a horn antenna to generate electromagnetic flying loops. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and examples.

[0032] This embodiment provides a reconfigurable surface unit for controlling the resistance of a radially polarized electromagnetic flying ring. The schematic diagram of its three-dimensional structure is shown in FIG. Figure 1 As shown, the side view is Figure 3 As shown, from top to bottom, the first dielectric substrate 17, the first metal patch 18, the second metal patch 19, and the second dielectric substrate 20 are sequentially included; the first metal patch 18 is located on the lower surface of the first dielectric substrate 17, and the second metal patch 19 is located on the upper surface of the second dielectric substrate 20. The first dielectric substrate 17 and the second dielectric substrate 20 are parallel and spaced apart. In this embodiment, the first dielectric substrate 17 and the second dielectric substrate 20 are annular and are both made of F4B material with a dielectric constant of 2.65, a loss tangent of 0.002, and a thickness of 2 mm.

[0033] The structural diagram of the first metal patch 18 is as follows Figure 2As shown in (a), it has a 36° rotationally symmetrical structure, including a first circular ring 1, a second circular ring group 2, a third circular ring 3, ten first inner rectangular patch groups 4 and ten first outer rectangular patch groups 5; the first circular ring 1, the second circular ring group 2 and the third circular ring 3 have the same center and are spaced from the outside to the inside, with the center located at the center of the lower surface of the first dielectric substrate 17; the first inner rectangular patch group 4 and the first outer rectangular patch group 5 are located in the same radial direction, and the central angles between adjacent first inner rectangular patch groups 4 and adjacent first outer rectangular patch groups 5 are all 36°.

[0034] like Figure 2 As shown in (a), the two ends of the first inner rectangular patch group 4 extend to the second circular ring group 2 and the third circular ring 3 respectively, including an inner first rectangular patch and an inner second rectangular patch distributed from the inside to the outside in the radial direction, and a gap is left between the inner first rectangular patch and the inner second rectangular patch; a diode is loaded between the gap between the two rectangular patches of the first inner rectangular patch group 4, and the positive pole of the diode is connected to the inner second rectangular patch, and the negative pole is connected to the inner first rectangular patch.

[0035] The two ends of the first outer rectangular patch group 5 extend to the first circular ring 1 and the second circular ring group 2 respectively, including an outer first rectangular patch and an outer second rectangular patch distributed from the inside to the outside in the radial direction, with a gap left between the outer first rectangular patch and the outer second rectangular patch; a diode is loaded between the gap between the two rectangular patches of the first outer rectangular patch group 5, the positive pole of the diode is connected to the outer first rectangular patch, and the negative pole is connected to the outer second rectangular patch.

[0036] The structural diagram of the second metal patch 19 is as follows Figure 2 As shown in (b), it has a (180 / 7)° rotational symmetry structure, including a fourth circular ring, a fifth circular ring group, a sixth circular ring, fourteen second inner rectangular patch groups, and fourteen second outer rectangular patch groups. The fourth circular ring, the fifth circular ring group, and the sixth circular ring have the same structural dimensions as the first circular ring 1, the second circular ring group 2, and the third circular ring 3 of the first metal patch 18, respectively. The second inner rectangular patch group and the fourteen second outer rectangular patch groups are located in the same radial direction, and the central angles between adjacent second inner rectangular patch groups and adjacent second outer rectangular patch groups are all (180 / 7)°. The second inner rectangular patch group has the same structure as the first inner rectangular patch group 4, and the second outer rectangular patch group has the same structure as the first outer rectangular patch group 5.

[0037] In the first metal patch 18 and the second metal patch 19, the on-off states of the diodes loaded at the gaps in the first inner rectangular patch group 4, the first outer rectangular patch group 5, the second inner rectangular patch group and the second outer rectangular patch group are the same, so as to realize the control of the on-off state of the electromagnetic flying ring.

[0038] The three rings / ring groups are used to connect the rectangular patch groups to achieve unified control of the on-off state of each diode, thereby achieving overall control of the surface unit, and at the same time facilitating the addition of bias circuits to regulate the different states of the diodes.

[0039] Any point on the first ring 1, the second ring group 2, and the third ring 3 is connected to a bias circuit on the top surface of the first dielectric substrate 17 via a metal through-hole. Similarly, any point on the fourth ring, the fifth ring group, and the sixth ring is connected to a bias circuit on the bottom surface of the second dielectric substrate 20 via a metal through-hole. The bias circuit includes three bias lines extending radially outward from the metal through-holes. The corresponding bias lines in the first ring 1, the third ring 3, the fourth ring, and the sixth ring are grounded, while the corresponding bias lines in the second ring group 2 and the fifth ring group are connected to an external power supply to achieve a 10mA power supply. When the bias lines corresponding to the second ring group 2 and the fifth ring group provide a 10mA power supply, the diodes conduct, representing a state of "1." When no power is provided, the diodes are off, representing a state of "0."

[0040] Furthermore, the second ring group 2 and the fifth ring group can be presented in two structures. The first structure is an independent ring, and the second structure is two spaced rings. The local details are as follows: Figure 4 and Figure 5 When the second and fifth ring groups are spaced apart, inner and outer rings, any point on the inner and outer rings reaches the other side of the dielectric substrate through a metal through-hole. The bias line starts from the metal through-hole corresponding to the inner ring and passes through the metal through-hole corresponding to the outer ring, extending radially outward.

[0041] The basic mechanism by which this metasurface unit realizes the encoding function of the reconfigurable electromagnetic flying ring is as follows: the two different states of the diode correspond to the two working states of the surface unit. Under different working states of the surface unit, the resistance of the electromagnetic flying ring in the radial range is different, thereby realizing the two state encodings of "0" and "1".

[0042] In this embodiment, the outer radius of the first circular ring 1 in the first structure is 18.8mm, and the inner radius is 18.495mm. The second circular ring group is a single circular ring with an outer radius of 14.175mm and an inner radius of 13.85mm. The outer radius of the third circular ring is 9.425mm, and the inner radius is 9.2mm. The outer second rectangular patch of the first outer rectangular patch group 5 measures 2.12mm×0.5mm, and the outer first rectangular patch of the first outer rectangular patch group 5 measures 2.17mm×0.5mm. The inner first and inner second rectangular patches of the first inner rectangular patch group 4 both measure 2.16mm×0.5mm. The gap length in the first inner rectangular patch group 4 and the first outer rectangular patch group 5 is 0.33mm.

[0043] The surface power supply in this embodiment mainly operates around 5-9 GHz and 10-12 GHz. The curve of the absolute value of the difference of the S21 coefficient of the surface unit in the two working states is as follows: Figure 6 As shown, the aperture of the electromagnetic flying ring generating device is located below the second dielectric substrate. Figure 6 It can be seen from the figure that there is a big difference between the two states of the surface unit in these two frequency bands, which can be used to realize the pass-resistance control of the radially polarized electromagnetic flying ring.

[0044] In this example, compared with the first structure, the second circular ring group of the second structure is adjusted to two circular rings with an inner radius of 13.825mm, an outer radius of 13.98mm and an inner radius of 14.02mm, an outer radius of 14.175mm. The size of the outer first rectangular patch of the first outer rectangular patch group 5 is 2.08mm×0.5mm, and the size of the inner second rectangular patch of the first inner rectangular patch group 4 is 2.09mm×0.5mm. Figure 7 This is a curve diagram of the absolute value of the difference in S21 coefficient under two working states when the second structural surface unit of the embodiment uses a coaxial line to generate a toroidal electric field.

[0045] This embodiment also provides a reconfigurable surface for controlling the resistance of a radially polarized electromagnetic flying ring, comprising three surface units implemented by the first structure, each surface unit being located in the same plane and having a common center. Figure 8 This is a schematic diagram of the bias circuit of the surface described in this embodiment, where the ground wires of the three surface units are connected together.

[0046] Figure 9The S11 curves of different states of 3-bit coding of the three-unit on-off reconfigurable plane built based on the unit structure when using a horn antenna of appropriate diameter are shown. The independent on-off control of the three units can realize 3-bit OOK coding, that is, completing eight states of "000", "001", "010", "011", "100", "101", "110", and "111". In order to ensure the coding effect, it is necessary to ensure that these eight states have obvious differences. Figure 9 It can be seen that there are obvious differences among the eight states around 6Ghz and 9Ghz, which can complete the encoding task.

[0047] In summary, this example constructs a reconfigurable surface unit for controlling radially polarized electromagnetic flying rings through the different states of the PIN diode, achieving a significant difference between the two states. The on and off states of the diode are used to realize the encoding of "0" and "1" of the electromagnetic flying ring within the radial range of the unit. At the same time, a three-unit on-off reconfigurable metasurface is constructed based on this unit, and its basic effect is tested. Within a certain frequency range, there are large differences among the eight encoding situations, and the 3-bit encoding task is basically completed.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A reconfigurable surface unit for controlling a radially polarized electromagnetic flying ring, characterized in that: The invention comprises, from top to bottom, a first dielectric substrate (17), a first metal patch (18), a second metal patch (19), and a second dielectric substrate (20); the first metal patch (18) is located on the lower surface of the first dielectric substrate (17), the second metal patch (19) is located on the upper surface of the second dielectric substrate (20), and the first dielectric substrate (17) and the second dielectric substrate (20) are parallel and spaced apart. The first metal patch (18) has a 36° rotationally symmetrical structure, comprising a first circular ring (1), a second circular ring group (2), a third circular ring (3), ten first inner rectangular patch groups (4) and ten first outer rectangular patch groups (5); the first circular ring (1), the second circular ring group (2) and the third circular ring (3) share a common center and are sequentially spaced from the outside to the inside, with the center located at the center of the lower surface of the first dielectric substrate (17); the first inner rectangular patch group (4) and the first outer rectangular patch group (5) are located in the same radial direction, and the center angles between adjacent first inner rectangular patch groups (4) and adjacent first outer rectangular patch groups (5) are both 36°; the first inner rectangular patch group (4) and the first outer rectangular patch group (5) are respectively loaded with diodes; The second metal patch (19) has a (180 / 7)° rotationally symmetrical structure, comprising a fourth circular ring, a fifth circular ring group, a sixth circular ring, fourteen second inner rectangular patch groups, and fourteen second outer rectangular patch groups; the fourth circular ring, the fifth circular ring group, and the sixth circular ring respectively have the same structural dimensions as the first circular ring (1), the second circular ring group (2), and the third circular ring (3) of the first metal patch (18); the second inner rectangular patch group and the fourteen second outer rectangular patch groups are located in the same radial direction, and the central angles between adjacent second inner rectangular patch groups and adjacent second outer rectangular patch groups are all (180 / 7)°; the second inner rectangular patch group has the same structure as the first inner rectangular patch group (4), and the second outer rectangular patch group has the same structure as the first outer rectangular patch group (5); The working state of the surface unit is controlled by controlling the on-off state of each diode.

2. The resistance reconfigurable surface unit for controlling radially polarized electromagnetic flying rings according to claim 1, characterized in that: The two ends of the first inner rectangular patch group (4) extend to the second circular ring group (2) and the third circular ring (3) respectively, and include an inner first rectangular patch and an inner second rectangular patch distributed from the inside to the outside in a radial direction, with a gap left between the inner first rectangular patch and the inner second rectangular patch; a diode is loaded between the gaps of the two rectangular patches of the first inner rectangular patch group (4), with the positive electrode of the diode connected to the inner second rectangular patch and the negative electrode connected to the inner first rectangular patch; The two ends of the first outer rectangular patch group (5) extend to the first circular ring (1) and the second circular ring group (2) respectively, and include an outer first rectangular patch and an outer second rectangular patch distributed from the inside to the outside in a radial direction, with a gap left between the outer first rectangular patch and the outer second rectangular patch; a diode is loaded between the gaps of the two rectangular patches of the first outer rectangular patch group (5), with the positive electrode of the diode connected to the outer first rectangular patch and the negative electrode connected to the outer second rectangular patch.

3. The resistance reconfigurable surface unit for controlling radially polarized electromagnetic flying rings according to claim 2, characterized in that: In the first metal patch (18) and the second metal patch (19), the on-off states of the diodes loaded at the gaps in the first inner rectangular patch group (4), the first outer rectangular patch group (5), the second inner rectangular patch group, and the second outer rectangular patch group are the same, so as to realize the control of the on-off state of the electromagnetic flying ring.

4. The resistance reconfigurable surface unit for controlling radially polarized electromagnetic flying rings according to claim 3, characterized in that: The on-off state of each diode is controlled by a bias circuit; any point in the first circular ring (1), the second circular ring group (2) and the third circular ring (3) is connected to the bias circuit on the upper surface of the first dielectric substrate (17) through a metal through-hole through the first dielectric substrate (17); any point in the fourth circular ring, the fifth circular ring group and the sixth circular ring is connected to the bias circuit on the lower surface of the second dielectric substrate (20) through a metal through-hole through the second dielectric substrate (20); the bias circuit includes three bias lines, which extend radially outward from the metal through-holes respectively; the corresponding bias lines in the first circular ring (1), the third circular ring (3), the fourth circular ring and the sixth circular ring are grounded, and the corresponding bias lines in the second circular ring group (2) and the fifth circular ring group are connected to an external power supply for realizing 10mA power supply.

5. The resistance reconfigurable surface unit for controlling radially polarized electromagnetic flying rings according to claim 4, characterized in that: The second circular ring group (2) and the fifth circular ring group can be presented in two structures, the first structure being an independent circular ring, and the second structure being two spaced circular rings; when the second circular ring group (2) and the fifth circular ring group are inner circular rings and outer circular rings that are spaced, any point in the inner circular ring and the outer circular ring reaches the other side of the dielectric substrate through a metal through hole, and the bias line starts from the metal through hole corresponding to the inner circular ring and extends radially outward through the metal through hole corresponding to the outer circular ring.

6. The resistance reconfigurable surface unit for controlling radially polarized electromagnetic flying rings according to claim 1, characterized in that: The first dielectric substrate (17) and the second dielectric substrate (20) are in annular shapes and are both made of F4B plate materials with a dielectric constant of 2.65, a loss tangent of 0.002, and a thickness of 2 mm.

7. The resistance reconfigurable surface unit for controlling radially polarized electromagnetic flying rings according to claim 5, characterized in that: The second circular ring group (2) is realized by the first structure, the outer radius of the first circular ring (1) is 18.8 mm, and the inner radius is 18.495 mm; the second circular ring group is a single independent circular ring, the outer radius is 14.175 mm, and the inner radius is 13.85 mm; the outer radius of the third circular ring is 9.425 mm, and the inner radius is 9.2 mm; the outer second rectangular patch of the first outer rectangular patch group (5) has a size of 2.12 mm × 0.5 mm, the outer first rectangular patch of the first outer rectangular patch group (5) has a size of 2.17 mm × 0.5 mm, and the inner first rectangular patch and the inner second rectangular patch of the first inner rectangular patch group (4) both have a size of 2.16 mm × 0.5 mm; the gap length in the first inner rectangular patch group (4) and the first outer rectangular patch group (5) is 0.33 mm.

8. The resistance reconfigurable surface unit for controlling radially polarized electromagnetic flying rings according to claim 5, characterized in that: The second circular ring group (2) realizes the inner circular ring and the outer circular ring of the second circular ring group distributed at intervals through the second structure, the inner radius and the outer radius of the inner circular ring are 13.825mm and 13.98mm respectively, the inner radius and the outer radius of the outer circular ring are 14.02mm and 14.175mm respectively, the outer first rectangular patch size of the first outer rectangular patch group (5) is set to 2.08mm×0.5mm, and the inner second rectangular patch size of the first inner rectangular patch group (4) is set to 2.09mm×0.5mm.

9. A reconfigurable surface for controlling the resistance of a radially polarized electromagnetic fly-ring, comprising N surface units according to claim 3, wherein the surface units are located in the same plane, have a common center, and have different inner and outer radii, where N is a positive integer greater than or equal to 1.

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