Paper folding reflective array antenna reconfigurable unit and array bias circuit wiring method thereof

Abstract

The invention discloses a reconfigurable unit of a paper folding reflective array antenna and an array bias circuit wiring method thereof. The reconfigurable unit sequentially comprises a metal ground, a foam air layer, a polyimide film layer and a metal patch layer from bottom to top, wherein the metal patch layer comprises a first metal patch layer and a second metal patch layer which are distributed at an interval, and a PIN diode is arranged between the first metal patch layer and the second metal patch layer; the first metal patch layer and the second metal patch layer are respectively provided with direct current bias via holes. The reflective array antenna unit based on the polyimide film has the advantages of being simple in structure, low in cost, light in weight, high in folding-unfolding ratio and high in performance, can be well suitable for a satellite-borne paper folding reflective array antenna, and meanwhile brings good wave beam regulation and control performance to the satellite-borne paper folding reflective array antenna.

Description

Technical Field

[0001] This invention belongs to the field of spaceborne antenna technology, specifically relating to a reconfigurable unit of a paper-fold reflective array antenna and its array bias circuit wiring method. Background Technology

[0002] With the rapid development of aerospace technology, satellites are increasingly being used in fields such as space communication, deep space exploration, astronomical observation, and electronic reconnaissance. As the "eyes" and "ears" of satellites, the beam control capability of spaceborne antennas directly determines the accuracy and reliability of satellite detection and communication. Reflector array antennas, due to their independently designable array elements, high flexibility, and ease of beam control through reconfigurable element design, and their lightweight, low profile, low cost, and deployable characteristics, have broad application prospects in spaceborne antennas.

[0003] Existing reconfigurable reflective array antennas consist of a feed and a reconfigurable reflective array. By designing reconfigurable elements with bias circuits on a rigid dielectric substrate, integrating electronic components such as PIN diodes and varactor diodes, these elements are used to form a reflective array. After the feed emits electromagnetic waves that illuminate the reflective array, the phase and amplitude of the reflected electromagnetic waves are changed by independently biasing the electronic components on each element, thereby achieving real-time beam control of the reflective array antenna.

[0004] However, existing reconfigurable reflective arrays are based on rigid media, making it difficult to improve their aspect ratio. This makes them unsuitable for large-aperture spaceborne antennas. Furthermore, they often have complex element structures and bias circuits, which are difficult to meet the cost and weight requirements of spaceborne antennas. Therefore, existing reconfigurable elements in reflective array antennas cannot adequately meet the application requirements of spaceborne antennas. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a reconfigurable unit for a paper-fold reflective array antenna and a wiring method for its array bias circuit. The technical problem to be solved by this invention is achieved through the following technical solution: In a first aspect, embodiments of the present invention provide a reconfigurable unit for an origami reflective array antenna, the reconfigurable unit comprising, from bottom to top, a metal ground, a foam air layer, a polyimide film layer, and a metal patch layer; wherein, the metal patch layer comprises a first metal patch layer and a second metal patch layer spaced apart, and a PIN diode is disposed between the first metal patch layer and the second metal patch layer; DC bias vias are respectively disposed on the first metal patch layer and the second metal patch layer.

[0006] In one embodiment of the present invention, the reconfigurable element of the origami reflector antenna has an operating center frequency of 15 GHz.

[0007] In one embodiment of the present invention, the thickness of the foam air layer is 1.8 mm; the thickness of the polyimide film layer is 0.1 mm and the dielectric constant is 3.4; the side length of the metal patch layer in the horizontal direction is 9.5 mm and the side length in the vertical direction is 4 mm; the distance between the DC bias vias on the first metal patch layer and the second metal patch layer is 4.8 mm; and the unit chamfer factor is 4 mm.

[0008] Secondly, embodiments of the present invention provide a wiring method for the array bias circuit of a reconfigurable element of a origami reflective array antenna, the wiring method comprising: The cell period spacing is determined according to the reconfigurable cell design of the origami reflective array antenna as described in any of the first aspects; A bias circuit is arranged on the lower surface of the polyimide film layer in the reconfigurable unit of the origami reflective array antenna. The arrangement direction angle of the reconfigurable unit of the origami reflective array antenna is changed, as well as the distribution direction and bias line width of the bias circuit in the reconfigurable unit of the origami reflective array antenna. The reflection characteristics of the reconfigurable unit of the origami reflective array antenna are analyzed. Based on the analysis results, the range of the arrangement direction angle of the reconfigurable unit of the origami reflective array antenna, as well as the distribution direction and bias line width of the bias circuit in the reconfigurable unit of the origami reflective array antenna are determined. Based on the layout requirements, the arrangement direction angle of the unit array is determined from the range of arrangement direction angles. Multiple reconfigurable units of the origami reflector antenna are arranged according to the arrangement direction angle of the unit array and the periodic spacing of the units. Based on the distribution direction of the bias circuit in the reconfigurable units of the origami reflector antenna and the bias line width, a bias circuit is arranged on the lower surface of the polyimide film layer in each reconfigurable unit of the origami reflector antenna to complete the bias circuit wiring.

[0009] In one embodiment of the present invention, the determined unit period spacing is 10 mm.

[0010] In one embodiment of the present invention, the determined arrangement direction angle range of the reconfigurable elements of the origami reflective array antenna is between -20° and +20°.

[0011] In one embodiment of the present invention, the bias circuit has a bias line width of 0.06mm to 0.09mm for the corresponding reconfigurable unit of the origami reflector antenna.

[0012] In one embodiment of the present invention, when the distribution direction of the reconfigurable units of the origami reflector antenna is longitudinal, the negative poles of all the reconfigurable units of the origami reflector antenna in each longitudinal direction are connected to a common negative pole bias line, and the positive poles of all the reconfigurable units of the origami reflector antenna in each longitudinal direction are connected to a separate positive pole bias line, and all the negative pole bias lines and positive pole bias lines extend to the edge of the folded surface.

[0013] In one embodiment of the present invention, when the distribution direction of the reconfigurable units of the origami reflector antenna is laterally distributed, the negative poles of all the reconfigurable units of the origami reflector antenna in each lateral direction are connected to a common negative pole bias line, and the positive poles of all the reconfigurable units of the origami reflector antenna in each lateral direction are connected to a separate positive pole bias line, and all the negative pole bias lines and positive pole bias lines extend to the edge of the folded surface.

[0014] The beneficial effects of this invention are: The reconfigurable element of the origami reflective array antenna proposed in this invention innovates the structure of the reflective array antenna element by designing a metal patch layer on the surface of the polyimide thin film layer. Reconfigurable reflection states are achieved through integrated PIN diodes, and the thickness of the reflective array antenna element is supported by a foam-filled air layer, beneath which lies a metal ground layer. The polyimide thin film-based reflective array antenna element features simple structure, low cost, lightweight, high fold-to-spread ratio, and high performance. It is well-suited for spaceborne origami reflective array antennas while providing excellent beam control performance.

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a reconfigurable unit for an origami reflective array antenna provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the relevant parameter design of the reconfigurable unit of the origami reflective array antenna provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the equivalent circuit of the PIN diode in two states provided in an embodiment of the present invention; Figures 4(a) to 4(b) This is a schematic diagram of the reflection phase shift and reflection amplitude curves of the reconfigurable unit of the origami reflective array antenna provided in this embodiment of the invention under two states at different operating center frequencies; Figure 5 This is a schematic diagram of the reflection phase difference variation curve of the reconfigurable element of the origami reflective array antenna under two states when a horizontally polarized wave is obliquely incident at different angles, as provided in an embodiment of the present invention. Figure 6 This is a schematic flowchart of the array bias circuit wiring method for the reconfigurable unit of the origami reflective array antenna provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the reconfigurable unit of the origami reflective array antenna provided in this embodiment of the invention under different arrangement directions and angles; Figure 8 This is a schematic diagram of the distribution of the bias circuit in the reconfigurable unit of the origami reflector antenna provided in an embodiment of the present invention; Figures 9(a) to 9(b) This is a schematic diagram of the longitudinal and lateral distribution of the bias circuit in the reconfigurable unit of the origami reflector antenna provided in an embodiment of the present invention; Figures 10(a) to 10(b) This is a schematic diagram of the reflection phase shift and reflection amplitude curves of the bias circuit provided in the embodiment of the present invention when it is laterally distributed in the reconfigurable unit of the origami reflective array antenna at different operating center frequencies in two states. Figures 11(a) to 11(b) This is a schematic diagram of the reflection phase shift and reflection amplitude curves of the bias circuit provided in the embodiment of the present invention when it is longitudinally distributed in the reconfigurable unit of the origami reflective array antenna at different operating center frequencies in two states. Figures 12(a) to 12(b) This is a schematic diagram showing the reflection phase difference and reflection amplitude curves in the ON state of the unit when the bias circuit is longitudinally distributed in the reconfigurable unit of the origami reflective array antenna under different bias line widths and the number of bias lines, according to an embodiment of the present invention. Figures 13(a) to 13(b) This is a schematic diagram of the reflection characteristic curves of the reconfigurable unit of the origami reflective array antenna without bias circuit provided in the embodiment of the present invention when the arrangement direction angles are 10° and 20°, respectively. Figures 14(a) to 14(b) This is a schematic diagram of the reflection characteristic curves of the origami reflective array antenna reconfigurable unit provided in the embodiment of the present invention under two states at different operating center frequencies when different numbers of bias circuits with a bias line width of 0.08mm are added when the arrangement direction angle is 10° and 20° respectively. Figure 15 This is a schematic diagram of the array wiring of the reconfigurable unit of the origami reflective array antenna provided in an embodiment of the present invention; Figure 16 This is a schematic diagram of the array and bias circuit wiring of the reconfigurable unit of the origami reflective array antenna in the origami configuration provided in the embodiment of the present invention; Figures 17(a) to 17(b) This is a schematic diagram of the beam control simulation results of the reflective array antenna provided in the embodiment of the present invention on the xoz and yoz planes respectively. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0018] Please see Figure 1This invention provides a reconfigurable unit for an origami reflector antenna, which comprises, from bottom to top, a metal ground, a foam air layer, a polyimide film layer, and a metal patch layer; wherein, the metal patch layer includes a first metal patch layer and a second metal patch layer spaced apart, and a PIN diode is disposed between the first metal patch layer and the second metal patch layer; DC bias vias are respectively disposed on the first metal patch layer and the second metal patch layer.

[0019] The unit metal patch includes a first metal patch layer, a second metal patch layer and an intermediate gap arranged symmetrically. A PIN diode is loaded in the intermediate gap. Both the first metal patch layer and the second metal patch layer are metal thin film microstrips.

[0020] The structural parameters of the reconfigurable element of the origami reflective array antenna of this invention are as follows: Figure 2 As shown, it includes: unit period spacing L Element tangent coefficient L 1 (Design unit with chamfered corners on all four sides for layout in origami configuration), DC bias via spacing L 2. Side lengths of the metal patch layer in the horizontal and vertical directions L x , L y The structural parameters of these origami reflector antenna reconfigurable elements vary depending on the required operating center frequency, including the thickness of the foam air layer, the thickness of the polyimide film layer, and the dielectric constant. By adjusting the structural parameters of the origami reflector antenna reconfigurable elements, the elements can be made to operate at the target frequency, with the reflection phases of the two states (ON and OFF) differing by 180°.

[0021] Taking a reconfigurable element of a origami reflector antenna with a working center frequency of 15 GHz as an example: the thickness of the foam air layer is 1.8 mm; the thickness of the polyimide film layer is 0.1 mm, and the dielectric constant is 3.4; the side length of the metal patch layer in the horizontal direction is... L x The side length in the vertical direction is 9.5mm. L y The distance between the DC bias vias on the first and second metal patch layers is 4mm. L 2 is 4.8mm; unit chamfer factor L 1 is 4mm; the PIN diode model is MADP-000907-14020p, and its equivalent circuit model is as follows. Figure 3 As shown, where L S=30pH, R S=7.8Ω, C T=0.025pF.

[0022] Figures 4(a) to 4(b) The reflection phase shift curves of the reconfigurable element of the origami reflector antenna at different operating center frequencies are shown in Figure 4(a). It can be seen that in the frequency range of 14GHz to 16GHz, the reflection phase difference of the reconfigurable element of the origami reflector antenna in the two states is maintained within the range of 180°±30°, and the reflection amplitude is always higher than -0.8dB in this frequency range, as shown in Figure 4(b).

[0023] Figure 5 The curves show the reflection phase difference variation of the reconfigurable element of the origami reflector antenna under different operating center frequencies when the horizontally polarized wave is incident at an oblique angle of 0° to 30°. It can be seen that the reconfigurable element of the origami reflector antenna can still maintain a reflection phase difference of 180°±20° in the frequency range of 14.5GHz to 15.5GHz, indicating that the reconfigurable element of the origami reflector antenna proposed in this invention has good reconfigurable reflection characteristics and angular stability.

[0024] In summary, the reconfigurable origami reflective array antenna unit proposed in this invention innovates the structure of the reflective array antenna unit. A metal patch layer is designed on the surface of the polyimide thin film layer, and a reconfigurable reflection state is achieved through integrated PIN diodes. Furthermore, the thickness of the reflective array antenna unit is supported by a foam-filled air layer, beneath which lies a metal ground layer. The polyimide thin film-based reflective array antenna unit features simple structure, low cost, lightweight, high fold-to-spread ratio, and high performance. It is well-suited for spaceborne origami reflective array antennas while providing excellent beam control performance.

[0025] Secondly, please see Figure 6 This invention provides a wiring method for the array bias circuit of a reconfigurable element in a origami reflective array antenna. The wiring method includes: S10. The cell period spacing determined according to the reconfigurable cell design of the origami reflective array antenna according to any one of the first aspects; S20. A bias circuit is arranged on the lower surface of the polyimide film layer in the reconfigurable unit of the origami reflective array antenna. The arrangement direction angle of the reconfigurable unit of the origami reflective array antenna is changed, as well as the distribution direction and bias line width of the bias circuit in the reconfigurable unit of the origami reflective array antenna. The reflection characteristics of the reconfigurable unit of the origami reflective array antenna are analyzed. Based on the analysis results, the arrangement direction angle range of the reconfigurable unit of the origami reflective array antenna, as well as the distribution direction and bias line width of the bias circuit in the reconfigurable unit of the origami reflective array antenna are determined. S30. Determine the unit array arrangement direction angle from the range of arrangement direction angles according to the layout requirements. Arrange multiple origami reflective array antenna reconfigurable units according to the unit array arrangement direction angle and unit period spacing. According to the distribution direction and bias line width of the bias circuit in the origami reflective array antenna reconfigurable units, arrange the bias circuit on the lower surface of the polyimide film layer in each origami reflective array antenna reconfigurable unit to complete the bias circuit wiring.

[0026] In the array bias circuit wiring of the reconfigurable unit of the origami reflector antenna, taking the working center frequency of the reconfigurable unit of the origami reflector antenna as 15GHz as an example: the period spacing of the unit is determined to be 10mm according to the structural parameters of the reconfigurable unit of the origami reflector antenna, which is slightly wider than the side length of the metal patch layer in the horizontal direction.

[0027] Through such Figure 7 The method shown changes the orientation angle of the reconfigurable elements of the origami reflector antenna. θ Analyze the angles of different arrangement directions θ The reflection characteristics of the reconfigurable elements of the folded paper reflective array antenna are used to determine the angular range of the arrangement direction that meets the performance requirements. Here, the angular range of the arrangement direction is between -20° and +20°.

[0028] After determining the range of angles for the arrangement direction, by means of... Figure 8 The bias circuit is arranged on the lower surface of the polyimide film layer as shown. The positive bias circuit is connected upwards to the first metal patch layer through a through-hole in the polyimide film layer, passes through the PIN diode and the second metal patch layer, and then connects to the negative bias circuit through a through-hole in the polyimide film layer. By analyzing the influence of the bias circuit on the lower surface of the polyimide film layer on the reflection characteristics of the reconfigurable element of the origami reflector antenna, specific parameters such as the distribution direction and bias line width of the bias circuit in the reconfigurable element of the origami reflector antenna can be determined.

[0029] Figures 9(a) to 9(b) The diagram illustrates the distribution of the bias circuit in the corresponding reconfigurable elements of the origami reflector antenna. As shown in Figure 9(a), when the distribution direction of the corresponding reconfigurable elements of the origami reflector antenna is longitudinal, the negative terminals of all reconfigurable elements of the origami reflector antenna in each longitudinal direction are connected to a common negative bias line, and the positive terminals of all reconfigurable elements of the origami reflector antenna in each longitudinal direction are connected to a separate positive bias line. Both negative and positive bias lines extend to the edge of the folded surface. As shown in Figure 9(b), when the distribution direction of the corresponding reconfigurable elements of the origami reflector antenna is transverse, the negative terminals of all reconfigurable elements of the origami reflector antenna in each transverse direction are connected to a common negative bias line, and the positive terminals of all reconfigurable elements of the origami reflector antenna in each transverse direction are connected to a separate positive bias line. Both negative and positive bias lines extend to the edge of the folded surface.

[0030] Figures 10(a) to 10(b) This diagram illustrates the reflection performance of a reconfigurable element in a paper-reflective array antenna when a laterally distributed bias circuit is added. Figures 11(a) to 11(b) This diagram illustrates the reflection performance of a reconfigurable element in a origami reflective array antenna when a longitudinally distributed bias circuit is added. Initially, the bias line widths for both distributions were set to 0.05 mm, and the via diameter of the polyimide film layer was set to 0.15 mm, a commonly used diameter in polyimide film processing. Figures 10(a) to 10(b) It can be observed that within a 1GHz range around the operating center frequency of 15GHz, the laterally distributed bias circuit significantly impacts the reflection performance of the reconfigurable elements of the origami reflector antenna. This causes resonance points at 15.4GHz and 14.4GHz for both ON and OFF states, respectively. Furthermore, the reflection phase in the OFF state changes from approximately -50° to approximately 72°, a significant deviation of 180°. Additionally, the element reflection amplitude also changes accordingly; the reflection amplitude in the ON state remains above -0.5dB for most of the range, reaching a minimum of -2.9dB at the 15.4GHz resonance. However, as... Figures 11(a) to 11(b) The longitudinally distributed bias circuit shown has minimal impact on the reconfigurable element of the origami reflector antenna. The reflection phase change in both states is within 2°, the reflection phase still differs by 180°, and the reflection amplitude change is within 0.1dB. The laterally distributed bias circuit significantly affects the reflection performance of the reconfigurable element of the origami reflector antenna, while the longitudinally distributed bias circuit has almost no impact. Therefore, the longitudinally distributed bias circuit is chosen.

[0031] Different numbers of longitudinally distributed offset lines were added to the reconfigurable element of the origami reflector antenna. The influence of different offset line widths on the reflection performance of the reconfigurable element of the origami reflector antenna at a center frequency of 15 GHz was analyzed. Figures 12(a) to 12(b) The reflection phase difference and reflection amplitude in the ON state for two types of units are given. The results show that, as shown in Figure 12(a), with the increase of the offset line width, the reflection phase difference between the two states increases from approximately 174°, reaching a maximum of approximately 195°. When the offset line width is within the range of 0.06mm to 0.09mm, it remains between 175° and 182°. However, as shown in Figure 12(b), the reflection amplitude in the ON state does not change significantly. Considering factors such as manufacturing errors, an offset line width of 0.08mm is preferred.

[0032] In summary, taking the working center frequency of the reconfigurable unit of the origami reflector antenna as 15GHz as an example: the bias circuit is distributed longitudinally in the corresponding origami reflector antenna reconfigurable unit; the bias line width of the bias circuit in the corresponding origami reflector antenna reconfigurable unit is 0.06mm~0.09mm.

[0033] To analyze and compare the effect of adding a bias circuit on the reflection performance of the reconfigurable elements of the origami reflective array antenna under different arrangement directions and angles. Figures 13(a) to 13(b) The reconfigurable element of the origami reflective array antenna without bias circuitry is presented, showing its reflection characteristics in two states at arrangement angles of 10° and 20°. Figures 14(a) to 14(b) The reflection characteristics of the reconfigurable elements of the origami reflector antenna at different operating center frequencies are presented for two states with different numbers of bias circuits with a bias line width of 0.08 mm when the arrangement angle of the elements is 10° and 20°. Figures 13(a) and 14(a) show the results for an arrangement angle of 10°, and Figures 13(b) and 14(b) show the results for an arrangement angle of 20°. The comparison shows that within the 20° arrangement angle range, the phase difference of the reconfigurable elements of the origami reflector antenna without bias circuits varies within 180° ± 30° between the two states. The reflection amplitude in the OFF state is around -0.2 dB, while the reflection amplitude in the ON state is higher than -1.6 dB. After adding different numbers of longitudinally distributed bias circuits with a bias line width of 0.08 mm, the phase difference of the reflection between the two states remains around 160°, and the reflection amplitude in the ON state is still higher than -1.2 dB. Since the reconfigurable elements of the origami reflective array antenna are symmetrical, it can be explained that when the arrangement direction angle of the reconfigurable elements of the origami reflective array antenna varies within the range of -20° to 20°, the origami reflective array antenna reconfigurable elements with added bias circuit can still maintain good reflection performance.

[0034] Figure 15 This is a schematic diagram of the bias circuit wiring after the arrangement direction angle of the reconfigurable units of the origami reflector array antenna is changed on a certain fold surface of the origami reflector array configuration to form an array. Based on the analysis in the previous step, the bias circuit is distributed longitudinally. Therefore, the negative terminal of all the reconfigurable units of the origami reflector array antenna in each longitudinal direction is connected to a negative bias wire, while the positive terminal of all the reconfigurable units of the origami reflector array antenna in each longitudinal direction is connected to a positive bias wire. All negative bias wires and positive bias wires extend to the edge of the fold surface. Figure 16 This is a specific example of the bias circuit distribution in the element array of an origami configuration. On each fold, the arrangement angle of the reconfigurable elements of the origami reflective array antenna varies due to different layout requirements, but all follow the... Figure 15The wiring method shown is used for routing the bias circuit. Here, the layout requirement could be, for example, the layout of the most origami reflector antenna reconfigurable elements.

[0035] Figures 17(a) to 17(b) The simulation results show the beamforming of the reconfigurable origami reflective array of the present invention in two directions after the bias circuit wiring is performed. As shown in Figure 17(a), the gain is highest at 0° direction, reaching 22.25 dBi. xoz A beam control range of ±45° was achieved on the surface, with the gain dropping to a minimum of 17.3 dBi at 45° pointing angle, resulting in a gain loss of 4.95 dB, as shown in Figure 17(b). yoz A beam control range of ±60° was achieved on the surface, with the pointing gain dropping to a minimum of 17.15dB at -60°, resulting in a gain loss of 5.1dB. This demonstrates that the origami reflector antenna, constructed from reconfigurable elements, exhibits excellent beam control performance.

[0036] The array bias circuit wiring method for the reconfigurable unit of the origami reflective array antenna proposed in this invention integrates electronic devices, bias circuits and metal patch layers into a polyimide thin film layer. The reconfigurable reflective array can be directly constructed by combining a foam air layer and a metal ground layer, providing a low-cost and easy-to-process feasible solution for the bias circuit wiring of the origami configuration unit array.

[0037] As for the method embodiment of the second aspect, since it is basically similar to the structural embodiment of the first aspect, the description is relatively simple, and relevant details can be found in the description of the structural embodiment of the first aspect.

[0038] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] Although the invention has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the specification and accompanying drawings, will understand and implement other variations of the disclosed embodiments in carrying out the claimed invention. In the specification, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. While certain measures are described in different embodiments, this does not mean that these measures cannot be combined to produce good results.

[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A reconfigurable element for an origami reflective array antenna, characterized in that, The reconfigurable unit of the origami reflector antenna, from bottom to top, includes a metal ground, a foam air layer, a polyimide film layer, and a metal patch layer; wherein, the metal patch layer includes a first metal patch layer and a second metal patch layer spaced apart, and a PIN diode is arranged between the first metal patch layer and the second metal patch layer; DC bias vias are respectively arranged on the first metal patch layer and the second metal patch layer.

2. The reconfigurable unit of the origami reflective array antenna according to claim 1, characterized in that, The reconfigurable unit of the origami reflector antenna operates at a center frequency of 15 GHz.

3. The reconfigurable unit of the origami reflective array antenna according to claim 2, characterized in that, The thickness of the foam air layer is 1.8 mm; the thickness of the polyimide film layer is 0.1 mm, and the dielectric constant is 3.4; the side length of the metal patch layer is 9.5 mm in the horizontal direction and 4 mm in the vertical direction; the distance between the DC bias vias on the first metal patch layer and the second metal patch layer is 4.8 mm; and the unit chamfer factor is 4 mm.

4. A wiring method for the array bias circuit of a reconfigurable element in a paper-fold reflective array antenna, characterized in that, The array bias circuit wiring method includes: The cell period spacing is determined by the reconfigurable cell design of the origami reflective array antenna according to any one of claims 1 to 3; A bias circuit is arranged on the lower surface of the polyimide film layer in the reconfigurable unit of the origami reflective array antenna. The arrangement direction angle of the reconfigurable unit of the origami reflective array antenna is changed, as well as the distribution direction and bias line width of the bias circuit in the reconfigurable unit of the origami reflective array antenna. The reflection characteristics of the reconfigurable unit of the origami reflective array antenna are analyzed. Based on the analysis results, the range of the arrangement direction angle of the reconfigurable unit of the origami reflective array antenna, as well as the distribution direction and bias line width of the bias circuit in the reconfigurable unit of the origami reflective array antenna are determined. Based on the layout requirements, the arrangement direction angle of the unit array is determined from the range of arrangement direction angles. Multiple reconfigurable units of the origami reflector antenna are arranged according to the arrangement direction angle of the unit array and the periodic spacing of the units. Based on the distribution direction of the bias circuit in the reconfigurable units of the origami reflector antenna and the bias line width, a bias circuit is arranged on the lower surface of the polyimide film layer in each reconfigurable unit of the origami reflector antenna to complete the bias circuit wiring.

5. The array bias circuit wiring method for the reconfigurable unit of the origami reflective array antenna according to claim 4, characterized in that, The determined unit period spacing is 10mm.

6. The array bias circuit wiring method for the reconfigurable unit of the origami reflective array antenna according to claim 4, characterized in that, The determined reconfigurable element arrangement angle range of the origami reflector antenna is between -20° and +20°.

7. The array bias circuit wiring method for the reconfigurable unit of the origami reflective array antenna according to claim 4, characterized in that, The bias circuit has a bias line width of 0.06mm to 0.09mm for the reconfigurable element of the corresponding origami reflector antenna.

8. The array bias circuit wiring method for the reconfigurable unit of the origami reflective array antenna according to claim 4, characterized in that, When the distribution direction of the reconfigurable units of the origami reflector antenna is longitudinal, the negative poles of all the reconfigurable units of the origami reflector antenna in each longitudinal direction are connected to a negative pole bias line, and the positive poles of all the reconfigurable units of the origami reflector antenna in each longitudinal direction are connected to a positive pole bias line. All negative pole bias lines and positive pole bias lines extend to the edge of the folded surface.

9. The array bias circuit wiring method for the reconfigurable unit of the origami reflective array antenna according to claim 4, characterized in that, When the distribution direction of the reconfigurable units of the origami reflector antenna is laterally distributed, the negative poles of all the reconfigurable units of the origami reflector antenna in each lateral direction are connected to a negative pole bias line, and the positive poles of all the reconfigurable units of the origami reflector antenna in each lateral direction are connected to a positive pole bias line separately. All negative pole bias lines and positive pole bias lines extend to the edge of the folded surface.

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