A liquid-based triple-polarization reconfigurable array antenna

Abstract

The present invention discloses a liquid-based triple-polarization reconfigurable array antenna, which is characterized in that the antenna comprises a dielectric substrate, a radiation unit, a ground plane, a plastic pipe, a microfluidic pump, a DC power supply, and a two-way switch. The radiation unit is printed on the front surface of the dielectric substrate, and the back surface of the dielectric substrate is completely covered by the ground plane. The antenna uses a two-way switch and a microfluidic pump to control the state of the liquid in the plastic pipe within the semi-circular notch of the radiation units arranged in an array. By changing the state of the liquid, the surface current of the antenna is changed, generating two degenerate modes, TM01 and TM10. Through a two-way switch and a microfluidic pump, three polarization modes, namely left-handed circular polarization, right-handed circular polarization, and linear polarization, can be flexibly switched. The antenna has a simple structure, a small volume, a low cost, a high control efficiency, and is convenient for production and application.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communication, and particularly relates to a liquid-based triple-polarization reconfigurable array antenna. Background Art

[0002] With the rapid development of electronic technology, electronic systems show a development trend of ultra-wideband, large-capacity, and multi-function, resulting in a sharp increase in the number of antennas in electronic systems. This poses a great challenge to improving the electromagnetic compatibility, reducing weight, and lowering costs of electronic systems, and has also become a major bottleneck restricting the rapid development and application of wireless communication. As a new type of antenna, reconfigurable antennas have attracted much attention at home and abroad because they have a certain effect on solving this bottleneck problem of wireless communication. Polarization reconfigurable antennas can select appropriate polarization modes according to the changes in the real-time environment, which can effectively reduce the power loss caused by polarization mismatch, enhance the anti-interference ability of signals, and improve the transmission efficiency of the system.

[0003] Currently, in order to achieve reconfigurable characteristics, PIN diodes or liquid metals are generally used as switches to control the current direction of the antenna. Liquid metal has the following advantages compared with PIN diodes: good conductivity, ductility, and fluidity. Scholars at home and abroad have also conducted a series of studies on polarization reconfigurable antennas. For example, Chen Qingqing et al. proposed a polarization reconfigurable microstrip antenna in the paper "A Polarization-Reconfigurable High-Gain Microstrip Antenna", which uses PIN diodes to control the current of a circular patch and successfully realizes three switchable polarization forms. However, its PIN diodes have problems of loss and complex control; Xu Chang et al. proposed a polarization reconfigurable antenna based on liquid metal in the paper "A Polarization-Reconfigurable Wideband High-Gain Antenna Using Liquid Metal Tuning". The polarization mode of this antenna is switched by changing the position of the liquid metal, but this antenna still has a problem of complex control because it has 13 switches. Summary of the Invention

[0004] To solve the steps of the prior art, the present invention provides a liquid-based triple-polarization reconfigurable array antenna. This antenna uses a bidirectional switch and a microfluidic pump to control the state of the liquid in a plastic pipe within a semi-circular notch of a radiation unit arranged in an array. By changing the state of the liquid, the surface current of the antenna is changed, thereby generating three different polarization modes. This antenna has the advantages of simple structure, small volume, and simple control, which is convenient for production and application.

[0005] The present invention adopts the following technical solution: A liquid-based triple-polarization reconfigurable array antenna, characterized in that the antenna comprises a dielectric substrate, radiation units, a ground plane, a plastic pipe, a microfluidic pump, a DC power supply, and a two-way switch. The radiation units are printed on the front side of the dielectric substrate, and the back side of the dielectric substrate is completely covered by the ground plane;

[0006] The radiation units include a first radiation unit and a second radiation unit. The first radiation unit and the second radiation unit have the same size, and the region where their outer contours are located is a square; the second radiation unit is obtained by rotating the first radiation unit 90° to the right on a plane;

[0007] At each of the left and right side edges or the upper and lower side edges of the first radiation unit, a semi-circular notch is provided. The center of the circle corresponding to the semi-circular notch is a point on the left and right side edge lines or the upper and lower side edge lines of the first radiation unit; when the semi-circular notches are provided at the left and right side edges of the first radiation unit, the open ends of the left and right semi-circular notches are arranged in opposite directions, and the distance between the lower end of the semi-circular notch at the left side edge of the first radiation unit and the lower end on the left side of the first radiation unit is equal to the distance between the upper end of the semi-circular notch at the right side edge of the first radiation unit and the upper end on the right side of the first radiation unit; when the semi-circular notches are provided at the upper and lower side edges of the first radiation unit, the open ends of the upper and lower semi-circular notches are arranged in opposite directions, and the distance between the left end of the semi-circular notch at the upper side edge of the first radiation unit and the left end on the upper side of the first radiation unit is equal to the distance between the right end of the semi-circular notch at the lower side edge of the first radiation unit and the right end on the lower side of the first radiation unit;

[0008] The radiation units are an array structure formed by the first radiation unit and the second radiation unit in an alternating arrangement. Two adjacent array units in the same row are different but have the same spacing, and two adjacent array units in the same column are also different but have the same spacing;

[0009] The plastic pipeline includes a semi-circular pipeline, a first interface and a second interface vertically arranged at both ends of the top surface of the semi-circular pipeline. The size of the semi-circular pipeline of the plastic pipeline matches the semi-circular notch on the radiation unit. A plastic pipeline is fixed at each semi-circular notch on the first radiation unit and the second radiation unit by bonding. And the distance from the first interface of each plastic pipeline to the end at the same side of the edge of its installation position on the corresponding radiation unit is equal. That is, when the first interface of a plastic pipeline is located at the lower part of the left semi-circular notch of the first radiation unit, the first interface of the other plastic pipeline is located at the upper part of the right semi-circular notch of the first radiation unit. The distance between the first interface of this plastic pipeline and the end at the lower left of the first radiation unit is equal to the distance between the first interface of the other plastic pipeline and the end at the upper right of the first radiation unit. The first interfaces of the semi-circular pipelines of all plastic pipelines are respectively communicated with the input port of the microfluidic pump through a liquid guide pipe and a multi-way conversion joint. The second interfaces of the semi-circular pipelines of all plastic pipelines are respectively communicated with the output port of the microfluidic pump through a liquid guide pipe and a multi-way joint. All semi-circular pipelines respectively form a closed loop with the microfluidic pump through a liquid guide pipe and a multi-way conversion joint. A liquid is filled in the pipeline of this closed loop, and the volume of the filled liquid is equal to the internal space volume of the pipeline of this closed loop. This liquid is liquid metal or dimethyl silicone oil. The microfluidic pump is electrically connected to a two-way switch, and the two-way switch is electrically connected to a DC power supply. The two-way switch controls the connection mode between the DC power supply and the microfluidic pump through its switch direction, and thus controls the rotation direction of the motor in the microfluidic pump.

[0010] The antenna feeding method is coaxial feeding, and excitation is given through an SMA connector. The middle of each first radiation unit and the second radiation unit respectively obtains an excitation power supply through an SMA connector.

[0011] Compared with the prior art, the beneficial effects of the antenna of the present invention are as follows: This antenna uses a two-way switch and a microfluidic pump to control the state of the liquid in the plastic pipeline in the semi-circular notch of the radiation units arranged in an array. By changing the state of the liquid, the surface current of the antenna is changed, and two degenerate modes TM01 and TM10 are generated. Three polarization modes, namely left-handed circular polarization, right-handed circular polarization, and linear polarization, can be flexibly switched through a two-way switch and a microfluidic pump. This antenna has a simple structure, small volume, low cost, high control efficiency, and is convenient for production and application. Description of the Drawings

[0012] Figure 1 is a front structural schematic diagram of a dielectric substrate of an embodiment of a liquid-based triple-polarization reconfigurable array antenna of the present invention.

[0013] Figure 2 is a back structural schematic diagram of a dielectric substrate of an embodiment of a liquid-based triple-polarization reconfigurable array antenna of the present invention.

[0014] Figure 3 It is a schematic structural diagram of a plastic pipe in an embodiment of a liquid-based triple-polarization reconfigurable array antenna of the present invention.

[0015] Figure 4 It is a schematic connection diagram among a microfluidic pump, a two-way switch, and a DC power supply in an embodiment of a liquid-based triple-polarization reconfigurable array antenna of the present invention.

[0016] Figure 5 It is the echo loss (│S 11 │) curve graph of the liquid-based triple-polarization reconfigurable array antenna in Embodiment 1 of the present invention (LHCP represents the antenna in the state of forward liquid flow, and RHCP represents the antenna in the state of reverse liquid flow).

[0017] Figure 6 It is the axial ratio characteristic (AR) curve graph of the liquid-based triple-polarization reconfigurable array antenna in Embodiment 1 of the present invention (LHCP represents the antenna in the state of forward liquid flow, and RHCP represents the antenna in the state of reverse liquid flow).

[0018] Figure 7 It is the radiation pattern of the liquid-based triple-polarization reconfigurable array antenna in Embodiment 1 of the present invention when radiating left-handed circularly polarized waves at 3.4 GHz (i.e., the radiation pattern of the antenna in the state of forward liquid flow).

[0019] Figure 8 It is the radiation pattern of the liquid-based triple-polarization reconfigurable array antenna in Embodiment 1 of the present invention when radiating right-handed circularly polarized waves at 3.4 GHz ((i.e., the radiation pattern of the antenna in the state of reverse liquid flow)).

[0020] Figure 1 In it, 1 - dielectric substrate, 2 - radiation unit, 3 - semi-circular notch, 4 - ground plane, 5 - plastic pipe, 6 - microfluidic pump, 7 - two-way switch, 8 - DC power supply. Detailed implementation manners

[0021] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings.

[0022] A liquid-based triple-polarization reconfigurable array antenna (hereinafter referred to as the antenna) of the present invention includes a dielectric substrate, a radiation unit, a ground plane, a plastic pipe, a microfluidic pump, a DC power supply, and a two-way switch. The radiation unit is printed on the front surface of the dielectric substrate, and the back surface of the dielectric substrate is completely covered by the ground plane;

[0023] The radiation unit includes a first radiation unit and a second radiation unit. The first radiation unit and the second radiation unit have the same size, and the region where their outer contours are located is a square. The second radiation unit is obtained by rotating the first radiation unit 90° clockwise in the plane.

[0024] On the left and right side edges or the upper and lower side edges of the first radiation unit, there is a semi-circular notch respectively. The center of the circle corresponding to the semi-circular notch is a point on the left and right side edge lines or the upper and lower side edge lines of the first radiation unit. When the semi-circular notches are arranged on the left and right side edges of the first radiation unit, the open ends of the semi-circular notches on the left and right sides are arranged in opposite directions, and the distance between the lower end of the semi-circular notch on the left side edge of the first radiation unit and the lower end on the left side of the first radiation unit is equal to the distance between the upper end of the semi-circular notch on the right side edge of the first radiation unit and the upper end on the right side of the first radiation unit. When the semi-circular notches are arranged on the upper and lower side edges of the first radiation unit, the open ends of the semi-circular notches on the upper and lower sides are arranged in opposite directions, and the distance between the left end of the semi-circular notch on the upper side edge of the first radiation unit and the left end on the upper side of the first radiation unit is equal to the distance between the right end of the semi-circular notch on the lower side edge of the first radiation unit and the right end on the lower side of the first radiation unit.

[0025] The radiation unit is an array structure formed by the first radiation unit and the second radiation unit in an alternating arrangement. Two adjacent array units in the same row are different but have the same spacing, and two adjacent array units in the same column are also different but have the same spacing.

[0026] The plastic pipeline includes a semi-circular pipeline, a first interface and a second interface that are vertically arranged at both ends of the top surface of the semi-circular pipeline. The size of the semi-circular pipeline of the plastic pipeline matches the semi-circular notch on the radiation unit. At each semi-circular notch of the first radiation unit and the second radiation unit, a plastic pipeline is fixed by bonding. And the distance from the first interface of each plastic pipeline to the end at the same side of the edge of its installation position on the corresponding radiation unit is equal. That is, when the first interface of a plastic pipeline is at the lower part of the left semi-circular notch of the first radiation unit, the first interface of the other plastic pipeline is at the upper part of the right semi-circular notch of the first radiation unit. The distance between the first interface of this plastic pipeline and the end at the lower left of the first radiation unit is equal to the distance between the first interface of the other plastic pipeline and the end at the upper right of the first radiation unit. The radial cross-section of the semi-circular pipeline is circular. The first interfaces of the semi-circular pipelines of all plastic pipelines are respectively communicated with the input port of the microfluidic pump through a liquid guide pipe and a multi-way conversion joint. The second interfaces of the semi-circular pipelines of all plastic pipelines are respectively communicated with the output port of the microfluidic pump through a liquid guide pipe and a multi-way joint. All semi-circular pipelines respectively form a closed loop with the microfluidic pump through a liquid guide pipe and a multi-way conversion joint. A liquid is filled in the pipeline of this closed loop, and the volume of the filled liquid is equal to the internal space volume of the pipeline of this closed loop. This liquid is liquid metal or dimethyl silicone oil. The microfluidic pump is electrically connected to a two-way switch, and the two-way switch is electrically connected to a DC power supply. The two-way switch controls the connection mode between the DC power supply and the microfluidic pump through its switch direction, and further controls the rotation direction of the motor in the microfluidic pump.

[0027] The radiation unit can be specifically obtained by etching. The antenna feeding method is coaxial feeding, and excitation is given through an SMA connector. The middle of each first radiation unit and the second radiation unit respectively obtains an excitation power supply through an SMA connector.

[0028] The present invention relates to a liquid-based triple-polarization reconfigurable array antenna. When the microfluidic pump is not working, the liquid filled in the pipeline of the closed loop is in a static state. At this time, the antenna is in a linear polarization state, that is, the electric field vector reciprocates along a line, which is called linear polarization. When the motor of the microfluidic pump rotates forward, the liquid filled in the pipeline of the closed loop is in a forward flow state, that is, the liquid in all plastic pipes flows from the first interface to the second interface. At this time, the antenna is in a left-handed circular polarization state, that is, an elliptical or circular polarization wave. Its electric field vector is in any fixed plane orthogonal to the propagation direction. When observed along the propagation direction, it rotates in the left-handed direction with time. When the motor of the microfluidic pump 6 rotates in the reverse direction, the liquid filled in the pipeline of the closed loop is in a reverse flow state, that is, the liquid in all plastic pipes flows from the second interface to the first interface. At this time, the antenna is in a right-handed circular polarization state, that is, an elliptical or circular polarization wave. Its electric field vector is in any fixed plane orthogonal to the propagation direction. When observed along the propagation direction, it rotates in the right-handed direction with time.

[0029] Embodiment 1

[0030] This embodiment provides a liquid-based triple-polarization reconfigurable array antenna (see Figure 1-4 ), the antenna includes a dielectric substrate 1, a radiation unit 2, a ground plane 4, a plastic pipe 5, a microfluidic pump 6, a DC power supply 8, and a two-way switch 7. The radiation unit 2 is printed on the front surface of the dielectric substrate 1, and the back surface of the dielectric substrate 1 is completely covered by the ground plane 4;

[0031] The radiation unit 2 includes a first radiation unit and a second radiation unit. The first radiation unit and the second radiation unit have the same size, and the region where their outer contours are located is a square. The second radiation unit is obtained by rotating the first radiation unit 90° to the right on the plane.

[0032] On the left and right side edges or the upper and lower side edges of the first radiation unit, a semi-circular notch 3 is provided at each position. The center of the circle corresponding to the semi-circular notch 3 is a point on the left and right side edge lines or the upper and lower side edge lines of the first radiation unit. When the semi-circular notch 3 is provided at the left and right side edges of the first radiation unit, the open ends of the semi-circular notches 3 on the left and right sides are arranged in opposite directions. The distance between the lower end of the semi-circular notch 3 at the left side edge of the first radiation unit and the lower end on the left side of the first radiation unit is equal to the distance between the upper end of the semi-circular notch 3 at the right side edge of the first radiation unit and the upper end on the right side of the first radiation unit. When the semi-circular notch 3 is provided at the upper and lower side edges of the first radiation unit, the open ends of the semi-circular notches 3 on the upper and lower sides are arranged in opposite directions. The distance between the left end of the semi-circular notch 3 at the upper side edge of the first radiation unit and the left end on the upper side of the first radiation unit is equal to the distance between the right end of the semi-circular notch 3 at the lower side edge of the first radiation unit and the right end on the lower side of the first radiation unit.

[0033] The radiation unit 2 is a 2×4 array structure formed by arranging the first radiation unit and the second radiation unit in an alternating manner. Two adjacent array units in the same row are different but have the same spacing, and two adjacent array units in the same column are also different but have the same spacing.

[0034] The plastic pipe 5 includes a semi-circular pipe and a first interface and a second interface vertically provided at both ends of the top surface of the semi-circular pipe. The size of the semi-circular pipe of the plastic pipe 5 matches the semi-circular notch 3 on the radiation unit 2. At each semi-circular notch 3 on the first radiation unit and the second radiation unit, a plastic pipe 5 is fixed by adhesion, and the distance from the first interface of each plastic pipe 5 to the end on the same side at the edge of its installation position of the corresponding radiation unit is equal. The radial cross-section of the semi-circular pipe is circular. The first interfaces of the semi-circular pipes of all the plastic pipes 5 are respectively connected to the input ports of the microfluidic pump 6 through liquid guide pipes and multi-way conversion joints, and the second interfaces of the semi-circular pipes of all the plastic pipes 5 are respectively connected to the output ports of the microfluidic pump 6 through liquid guide pipes and multi-way joints. All the semi-circular pipes respectively form a closed loop with the microfluidic pump 6 through liquid guide pipes and multi-way conversion joints. A liquid is filled in the pipeline of the closed loop, and the volume of the filled liquid is equal to the internal space volume of the pipeline of the closed loop. The liquid is liquid metal or dimethyl silicone oil. The microfluidic pump 6 is electrically connected to the two-way switch 7, and the two-way switch 7 is electrically connected to the DC power supply 8. The two-way switch 7 controls the connection mode between the DC power supply 8 and the microfluidic pump 6 through its switch direction, and further controls the rotation direction of the motor in the microfluidic pump 6.

[0035] The model of the two-way switch 7 is E-TEN1322, and the model of the microfluidic pump 6 is JSB2431001.

[0036] The shape of the dielectric substrate 1 is rectangular, its material is polytetrafluoroethylene (F4B), its dielectric constant is 2.65, and the size of the dielectric substrate 1 is 188 mm × 96 mm × 4 mm.

[0037] The size of the region where the outer contour of the first radiation element is located is a square of 24 mm × 24 mm; the outer diameter of the semi-circular notch 3 is 10 mm, and the inner diameter is 8 mm; when the semi-circular notch 3 is provided at the left and right side edges of the first radiation element, the distance between the lower end of the semi-circular notch 3 at the left side edge of the first radiation element and the lower end on the left side of the first radiation element is 2 mm.

[0038] Perform performance analysis on the antenna in this embodiment. Figure 5 and Figure 6 are respectively the return loss and axial ratio curves of the antenna in this embodiment. It can be seen from the figure that the return loss of the antenna is less than -10 dB and the axial ratio is less than 3 dB in the frequency band of 3.25 - 3.6 GHz, which enables the antenna to operate in the 3.25 - 3.6 GHz band and has circular polarization characteristics in this frequency band.

[0039] Figure 7 and Figure 8 are respectively the radiation patterns of the antenna in this embodiment corresponding to different polarization modes when the antenna operates at 3.4 GHz. In the figure, E and H refer to the electric field and magnetic field. It can be seen from the figure that the radiation pattern of the antenna in this embodiment is stable and the gain reaches 10.7 dB, proving that the antenna exhibits good directivity and meets the engineering requirements.

[0040] The above examples are the preferred embodiments of the present invention. Additionally, on the basis of this embodiment, changing the size, quantity, or setting method should be included within the protection scope of this application.

[0041] Matters not described in the present invention are applicable to the prior art.

Claims

1. A liquid-based triple-polarization reconfigurable array antenna, characterized in that, The antenna includes a dielectric substrate, a radiation unit, a ground plane, a plastic pipe, a microfluidic pump, a DC power supply, and a two-way switch. The radiation unit is printed on the front surface of the dielectric substrate, and the back surface of the dielectric substrate is completely covered by the ground plane; The radiation unit includes a first radiation unit and a second radiation unit. The first radiation unit and the second radiation unit have the same size, and the area where their outer contours are located is a square; the second radiation unit is obtained by rotating the first radiation unit 90° to the right on a plane; On the left and right side edges or the upper and lower side edges of the first radiation unit, there is a semi-circular notch respectively. The center of the circle corresponding to the semi-circular notch is a point on the left and right side edge lines or the upper and lower side edge lines of the first radiation unit; when the semi-circular notches are arranged on the left and right side edges of the first radiation unit, the open ends of the semi-circular notches on the left and right sides are arranged back to back, and the distance between the lower end of the semi-circular notch on the left side edge of the first radiation unit and the lower end on the left side of the first radiation unit is equal to the distance between the upper end of the semi-circular notch on the right side edge of the first radiation unit and the upper end on the right side of the first radiation unit; when the semi-circular notches are arranged on the upper and lower side edges of the first radiation unit, the open ends of the semi-circular notches on the upper and lower sides are arranged back to back, and the distance between the left end of the semi-circular notch on the upper side edge of the first radiation unit and the left end on the upper side of the first radiation unit is equal to the distance between the right end of the semi-circular notch on the lower side edge of the first radiation unit and the right end on the lower side of the first radiation unit; The radiation unit is an array structure formed by the first radiation unit and the second radiation unit in an alternating arrangement. Two adjacent array units in the same row are different but have the same spacing, and two adjacent array units in the same column are also different but have the same spacing; The plastic pipe includes a semi-circular pipe and a first interface and a second interface vertically arranged at both ends of the top surface of the semi-circular pipe, The size of the semi-circular pipe of the plastic pipe matches the semi-circular notch on the radiation unit. A plastic pipe is fixed at each semi-circular notch on the first radiation unit and the second radiation unit by bonding. The distance from the first interface of each plastic pipe to the end on the same side at the edge of its installation position on the corresponding radiation unit is equal; that is, when the first interface of a plastic pipe is at the lower part of the semi-circular notch on the left side of the first radiation unit, the first interface of the other plastic pipe is at the upper part of the semi-circular notch on the right side of the first radiation unit, and the distance between the first interface of this plastic pipe and the end at the lower left of the first radiation unit is equal to the distance between the first interface of the other plastic pipe and the end at the upper right of the first radiation unit; the first interfaces of the semi-circular pipes of all plastic pipes are respectively connected to the input port of the microfluidic pump through a liquid guide pipe and a multi-way conversion joint, and the second interfaces of the semi-circular pipes of all plastic pipes are respectively connected to the output port of the microfluidic pump through a liquid guide pipe and a multi-way joint. All semi-circular pipes form a closed loop with the microfluidic pump through a liquid guide pipe and a multi-way conversion joint; a liquid is filled in the pipeline of this closed loop, and the volume of the filled liquid is equal to the internal space volume of the pipeline of this closed loop; this liquid is liquid metal or dimethyl silicone oil; the microfluidic pump is electrically connected to a two-way switch, the two-way switch is electrically connected to a DC power supply, and the two-way switch controls the connection mode between the DC power supply and the microfluidic pump through its switch direction, thereby controlling the rotation direction of the motor in the microfluidic pump.

2. The liquid-based triple-polarization reconfigurable array antenna according to claim 1, characterized in that The radial cross-section of the semi-circular pipe is circular.

3. The liquid-based triple-polarization reconfigurable array antenna according to claim 1, characterized in that The radiation unit is a 2×4 array structure formed by arranging the first radiation unit and the second radiation unit alternately.

4. A liquid-based triple-polarization reconfigurable array antenna according to claim 1, wherein, The model of the two-way switch is E-TEN1322, and the model of the microfluidic pump is JSB2431001.

5. The liquid-based triple-polarization reconfigurable array antenna according to claim 1, wherein, The material of the dielectric substrate is polytetrafluoroethylene, and its dielectric constant is 2.

65.

6. A liquid-based triple-polarization reconfigurable array antenna according to claim 1, characterized in that, The size of the dielectric substrate is 188mm×96mm×4mm.

7. A liquid-based triple-polarized reconfigurable array antenna according to claim 1, characterized in that The size of the area where the outer contour of the first radiation unit is located is a square of 24mm×24mm.

8. The liquid-based triple-polarization reconfigurable array antenna according to claim 1, characterized in that, The outer diameter of the semi-circular notch is 10mm, and the inner diameter is 8mm; when the semi-circular notch is arranged at the left and right side edges of the first radiation unit, the distance between the lower end of the semi-circular notch at the left side edge of the first radiation unit and the lower left end of the first radiation unit is 2mm.

9. The liquid-based triple-polarization reconfigurable array antenna according to claim 1, wherein, The antenna feeding method is coaxial feeding, and excitation is given through an SMA connector. The middle of each first radiation unit and the second radiation unit respectively obtains an excitation power supply through an SMA connector.

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