Reconfigurable antenna based on slot coupling, control method, computing device, computer-readable storage medium and computer program product

Abstract

The embodiments of the present specification provide a reconfigurable antenna based on slot coupling and a control method, wherein the reconfigurable antenna based on slot coupling comprises: an antenna body, a varactor diode and a PIN diode; the antenna body comprises a semicircular patch, a branch unit and a ground plane; there is a patch gap between the semicircular patch and the branch unit, the varactor diode is arranged in the patch gap, and the varactor diode connects the semicircular patch with the branch unit; the varactor diode is provided with a corresponding first bias circuit, and the first bias circuit is used to adjust the voltage across the varactor diode to reconstruct the antenna frequency; a floor gap is provided on the surface of the ground plane, a PIN diode is provided in the floor gap, and the PIN diode is provided with a corresponding second bias circuit, and the second bias circuit is used to adjust the on-off state of the PIN diode to reconstruct the antenna's radiation pattern, so as to achieve reconstruction of the antenna's frequency and radiation pattern through a simple structure.

Description

Technical Field

[0001] The embodiments of this specification relate to the field of microwave antenna technology, and in particular to a reconfigurable antenna based on slot coupling and a control method. Background Art

[0002] With the rapid development of wireless communication technology, the communication environment has become increasingly complex and changeable. Traditional fixed structure antennas can no longer meet the diverse communication needs. The emergence of reconfigurable antennas fills this gap. It can adjust the antenna's structural parameters, such as frequency, beam width, polarization mode, etc., in real time according to different communication environments and needs, so as to achieve the best communication effect. In practical applications, reconfigurable antennas have been widely used in satellite communications, radar detection, mobile communications and other fields. In satellite communications.

[0003] At present, there are studies on reconfigurable antennas, which mainly change the current or aperture field distribution of the antenna by integrating adjustable elements in the antenna structure, thereby changing the antenna's frequency, radiation pattern, polarization and other electrical performance parameters. At present, the main implementation methods of multi-band radiation pattern reconfigurable antennas are: multi-branch method, parasitic branch method and frequency doubling method. However, these implementation methods in the prior art still have the problem of limited frequency and application scenarios. Therefore, it is necessary to provide a solution to solve the above technical problems. Summary of the invention

[0004] In view of this, an embodiment of the present specification provides a reconfigurable antenna based on slot coupling. One or more embodiments of the present specification also relate to a control method of a reconfigurable antenna based on slot coupling, a computing device, a computer-readable storage medium, and a computer program product to solve the technical defects existing in the prior art.

[0005] According to a first aspect of an embodiment of this specification, a reconfigurable antenna based on slot coupling is provided, including:

[0006] Antenna body, varactor diode and PIN diode;

[0007] The antenna body includes a semicircular patch, a branch unit and a ground plate;

[0008] There is a patch gap between the semicircular patch and the branch unit, the varactor is arranged in the patch gap, and the varactor connects the semicircular patch and the branch unit;

[0009] The varactor diode is provided with a corresponding first bias circuit, and the first bias circuit is used to adjust the voltage across the varactor diode to reconstruct the antenna frequency;

[0010] A floor gap is arranged on the surface of the grounding plate, a PIN diode is arranged in the floor gap, and the PIN diode is provided with a corresponding second bias circuit, and the second bias circuit is used to adjust the on-off state of the PIN diode to reconstruct the directional pattern of the antenna.

[0011] Optionally, the branch unit includes a first branch unit and a second branch unit, and the first branch unit and the second branch unit are respectively arranged on two sides of the semicircular patch and are symmetrical to each other;

[0012] The first branch unit and the first side of the semicircular patch form a first patch gap, the second branch unit and the second side of the semicircular patch form a second patch gap, and a low-frequency resonance point is formed when current flows through the semicircular patch, the first branch unit and the second branch unit.

[0013] Optionally, the varactor diode includes a first varactor diode and a second varactor diode;

[0014] The first variable capacitance diode is arranged in the first patch gap, and is used to connect the semicircular patch and the first branch unit; the second variable capacitance diode is arranged in the second patch gap, and is used to connect the semicircular patch and the second branch unit;

[0015] The first varactor diode and the second varactor diode are provided with a first bias circuit, and the first bias circuit is connected to the semicircular patch.

[0016] Optionally, the antenna body further comprises: a dual-frequency microstrip patch and a dielectric substrate;

[0017] The dual-frequency microstrip patch includes a circular patch, the circular patch is connected to the semicircular patch, the semicircular patch, the circular patch and the branch unit constitute the main radiation unit of the dual-frequency microstrip patch, and the main radiation unit is used to radiate or receive radio propagation energy;

[0018] The dual-frequency microstrip patch and the ground plane are respectively arranged on two opposite surfaces of the dielectric substrate.

[0019] Optionally, the PIN diode includes a first PIN diode, a second PIN diode, a third PIN diode and a fourth PIN diode;

[0020] The first PIN diode and the third PIN diode are arranged on a first side of the dual-frequency microstrip patch, and the second PIN diode and the fourth PIN diode are arranged on a second side of the dual-frequency microstrip patch;

[0021] The first PIN diode and the second PIN diode are symmetrical to each other, and the third PIN diode and the fourth PIN diode are symmetrical to each other.

[0022] Optionally, each of the PIN diodes is correspondingly provided with a second bias circuit;

[0023] The first PIN diode and the corresponding second bias circuit, the second PIN diode and the corresponding second bias circuit are arranged on the surface of the dielectric substrate facing the dual-frequency microstrip patch;

[0024] The third PIN diode and the corresponding second bias circuit, the fourth PIN diode and the corresponding second bias circuit are arranged on the surface of the dielectric substrate facing the ground plate.

[0025] Optionally, a first through hole and a second through hole are provided on the dielectric substrate;

[0026] A connector is disposed in the first through hole to connect the first PIN diode and the third PIN diode, and a connector is disposed in the second through hole to connect the second PIN diode and the fourth PIN diode.

[0027] Optionally, a third patch gap is provided on the surface of the circular patch, the third patch gap is in an axisymmetric shape, and a high-frequency resonance point is formed when current flows through the circular patch.

[0028] According to a second aspect of an embodiment of this specification, a control method for a reconfigurable antenna based on slot coupling is provided, which is applied to the reconfigurable antenna based on slot coupling, and includes:

[0029] receiving circuit control instructions;

[0030] determining a target bias circuit based on the circuit control instruction, and adjusting a voltage of the target bias circuit;

[0031] According to the voltage change of the target bias circuit, the voltage of the varactor is adjusted and / or the on-off state of the PIN diode is changed, wherein the varactor is used to reconstruct the antenna frequency and the PIN diode is used to reconstruct the antenna pattern.

[0032] According to a third aspect of an embodiment of this specification, a computing device is provided, including:

[0033] Memory and processor;

[0034] The memory is used to store computer programs / instructions, and the processor is used to execute the computer programs / instructions. When the computer programs / instructions are executed by the processor, the steps of the control method of the reconfigurable antenna based on slot coupling are implemented.

[0035] According to a fourth aspect of the embodiments of this specification, a computer-readable storage medium is provided, which stores a computer program / instruction, and when the computer program / instruction is executed by a processor, the steps of the control method of the reconfigurable antenna based on slot coupling are implemented.

[0036] According to a fifth aspect of the embodiments of this specification, a computer program product is provided, including a computer program / instruction, which implements the steps of the control method of the reconfigurable antenna based on slot coupling when executed by a processor.

[0037] In one embodiment of the present specification, two varactor diodes are arranged on the basis of the antenna body, and the branch unit is connected to the semicircular patch through the varactor diode. The voltage of the varactor diode is changed through the first bias circuit, thereby changing the equivalent electrical length of the antenna, thereby realizing the frequency reconfiguration of the antenna. In addition, a PIN diode is arranged in the gap of the ground plate, and the on-off state of the PIN diode is changed through the second bias circuit, which is equivalent to controlling the length of the gap on the surface of the ground plate, so that the gap mode and the patch mode are coupled to different degrees, thereby realizing the working mode switching and directional pattern reconstruction of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a reconfigurable antenna based on slot coupling provided by an embodiment of this specification;

[0039] Figure 2 A reconfigurable antenna based on slot coupling is provided in one embodiment of this specification. Figure 1 Equivalent structural diagram;

[0040] Figure 3 This is a graph showing the variation of the S11 parameter with the varactor diode bias voltage V0 when four PIN diodes are connected in a slot-coupling-based reconfigurable antenna provided by an embodiment of the present specification;

[0041] Figure 4 It is a radiation pattern of the antenna at low frequency when four PIN diodes in a reconfigurable antenna based on slot coupling are connected in one embodiment of the present specification;

[0042] Figure 5 It is a radiation pattern of the antenna at high frequency when four PIN diodes in a reconfigurable antenna based on slot coupling are connected in one embodiment of the present specification;

[0043] Figure 6 is a graph showing a change in an S11 parameter with a varactor diode bias voltage V0 when a first PIN diode is disconnected in a slot-coupling-based reconfigurable antenna provided by an embodiment of the present specification;

[0044] Figure 7 A radiation pattern of an antenna at a low frequency when a first PIN diode in a reconfigurable antenna based on slot coupling is disconnected provided by an embodiment of the present specification;

[0045] Figure 8 A radiation pattern of an antenna at a high frequency when a first PIN diode in a reconfigurable antenna based on slot coupling is disconnected provided by an embodiment of the present specification;

[0046] Fig. 9 is a graph showing a change in an S11 parameter with a varactor diode bias voltage V0 when a second PIN diode is disconnected in a slot-coupling-based reconfigurable antenna provided by an embodiment of the present specification;

[0047] Fig.10 A radiation pattern of the antenna at a low frequency when the second PIN diode in a reconfigurable antenna based on slot coupling is disconnected provided by an embodiment of the present specification;

[0048] Fig.11 A radiation pattern of an antenna at a high frequency when a second PIN diode in a reconfigurable antenna based on slot coupling is disconnected provided by an embodiment of the present specification;

[0049] Fig.12 This is a graph showing the variation of the S11 parameter with the varactor diode bias voltage V0 when all four PIN diodes in a slot-coupling-based reconfigurable antenna are disconnected, provided in one embodiment of the present specification;

[0050] Fig.13 It is a radiation pattern of the antenna at low frequency when four PIN diodes in a reconfigurable antenna based on slot coupling are disconnected, provided by an embodiment of this specification;

[0051] Fig.14 It is a radiation pattern of the antenna at high frequency when four PIN diodes in a reconfigurable antenna based on slot coupling are disconnected, provided by an embodiment of this specification;

[0052] Fig.15 It is a curve simulation diagram of the change of parameter S11 with parameter L8 in a reconfigurable antenna based on slot coupling provided by an embodiment of this specification;

[0053] Fig.16It is a curve simulation diagram of the change of parameter S11 with parameter W3 in a reconfigurable antenna based on slot coupling provided by an embodiment of this specification;

[0054] Fig.17 is a flow chart of a control method of a reconfigurable antenna based on slot coupling provided by an embodiment of this specification;

[0055] Fig.18 It is a structural block diagram of a computing device provided by an embodiment of this specification.

[0056] Figure 1 to Figure 2 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0057] 1. Antenna body; 11. Dual-band microstrip patch; 111. Semicircular patch; 1111. First patch gap; 1112. Second patch gap; 112. Circular patch; 1121. Third patch gap; 113. Branch unit; 1131. First branch unit; 1132. Second branch unit; 12. Ground plate; 121. Floor gap; 13. Dielectric substrate; 2. Varactor diode; 21. First varactor diode; 22. Second varactor diode; 3. PIN diode; 31. First PIN diode; 32. Second PIN diode; 33. Third PIN diode; 34. Fourth PIN diode; 4. First bias circuit; 5. Second bias circuit; 6. First through hole; 7. Second through hole; 8. Main feed line. DETAILED DESCRIPTION

[0058] Many specific details are described in the following description to facilitate a full understanding of this specification. However, this specification can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of this specification, so this specification is not limited to the specific implementation disclosed below.

[0059] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0060] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0061] First, the terms involved in one or more embodiments of this specification are explained.

[0062] Antenna pattern: also called radiation pattern or far-field pattern, is a graphical representation of the intensity distribution of electromagnetic waves radiated or received by an antenna in all directions in three-dimensional space.

[0063] In this specification, a reconfigurable antenna based on slot coupling is provided. This specification also relates to a control method of the reconfigurable antenna based on slot coupling, which will be described in detail one by one in the following embodiments.

[0064] See also Figure 1 , Figure 1 A structural diagram of a reconfigurable antenna based on slot coupling according to an embodiment of the present specification is shown, which specifically includes the following contents:

[0065] The antenna body 1 includes a semicircular patch 111, a branch unit 113 and a ground plate 12; there is a patch gap between the semicircular patch 111 and the branch unit 113, and the varactor 2 is arranged in the patch gap, and the varactor 2 connects the semicircular patch 111 with the branch unit 113; the varactor 2 is provided with a corresponding first bias circuit 4, and the first bias circuit 4 is used to adjust the voltage across the varactor 2 to reconstruct the antenna frequency; the surface of the ground plate 12 is provided with a floor gap 121, and a PIN diode 3 is arranged in the floor gap 121, and the PIN diode 3 is provided with a corresponding second bias circuit 5, and the second bias circuit 5 is used to adjust the on-off state of the PIN diode 3 to reconstruct the antenna radiation pattern.

[0066] Specifically, slot antennas are widely used in modern wireless communication systems. The antenna provided in the embodiment of this specification includes an antenna body 1, and a varactor diode 2 and a PIN diode 3 added to the antenna body 1, wherein the semicircular patch 111 is a part of the dual-frequency microstrip patch 11, and the dual-frequency microstrip patch 11 includes a semicircular patch 111, a circular patch (112) and a branch unit 113. There is a gap between the semicircular patch 111 and the branch unit 113, which is called a patch gap. The varactor diode 2 is arranged in the patch gap, and the two ends of the varactor diode 2 are respectively connected to the branch unit 113 and the semicircular patch 111. In order to facilitate the control of the voltage of the varactor diode 2, a first bias circuit 4 is set, and the capacitance value of the varactor diode 2 is controlled by adjusting the voltage of the first bias circuit 4, so that the frequency of the antenna can be adjusted. The surface of the grounding plate 12 is also provided with a gap, called a floor gap 121. The shape of the grounding plate 12 is preferably designed to be rectangular, and the floor gap is axially symmetrical. A PIN diode 3 is arranged in the floor gap 121. In order to facilitate the control of the on-off state of the PIN diode 3, a second bias circuit 5 is provided. By changing the voltage of the second bias circuit 5, the on or off state of the PIN diode 3 is controlled, thereby achieving adjustable antenna radiation pattern.

[0067] A reconfigurable antenna based on slot coupling provided in this specification adds a varactor diode 2 and a PIN diode 3 to the original antenna body 1. The equivalent electrical length of the antenna is changed by changing the voltage across the varactor diode 2 to achieve frequency reconfiguration of the antenna. By changing the on-off state of the PIN diode 3, the slot length on the surface of the ground plate 12 is equivalently controlled, so that the slot mode is coupled to the dual-frequency microstrip patch 11 mode to different degrees, thereby achieving antenna working mode switching and directional pattern performance reconstruction.

[0068] According to the Babinet principle, on an infinite ground plane, the slot antenna and its corresponding complementary dipole antenna have consistent radiation patterns, while the situation on a finite ground plane is slightly different. Suppose there is a horizontal slot on an infinite ideal conductive plane, which is rectangular in shape, with a length of a and a width of b.

[0069] The fundamental mode of the gap is mode, the electric field in the gap With current mutually orthogonal, The standing waves are evenly distributed on both sides of the center of the gap. The wide side a perpendicular to the gap can be specifically given by formula (1):

[0070] Formula (1)

[0071] In the formula, is the maximum value of the electric field strength.

[0072] The surface current distribution on the conductive plane around the gap can be given by equation (2):

[0073] Formula (2)

[0074] In the formula, is the maximum value of the current amplitude.

[0075] The electric field intensity reaches the maximum at the center of the long side of the slot, while the current intensity on the conductive plane near the slot reaches the minimum. In addition, the surface current direction on both sides of the slot shows obvious symmetry.

[0076] According to the duality principle in electromagnetics, the field and magnetic field distribution of the slot antenna and the dipole antenna have a corresponding relationship, and the radiation pattern is consistent. Based on this theoretical foundation, the radiation field characteristics of the slot antenna can be directly derived by studying the radiation field of the symmetrical dipole antenna, as shown in equations (3) and (4):

[0077] Formula (3)

[0078] Formula (4)

[0079] Furthermore, the branch unit 113 includes a first branch unit 1131 and a second branch unit 1132, and the first branch unit 1131 and the second branch unit 1132 are respectively arranged on both sides of the semicircular patch 111 and are symmetrical to each other; the first branch unit 1131 and the first side of the semicircular patch 111 form a first patch gap 1111, and the second branch unit 1132 and the second side of the semicircular patch 111 form a second patch gap 1112, and a low-frequency resonance point is formed when current flows through the semicircular patch 111, the first branch unit 1131 and the second branch unit 1132.

[0080] Specifically, in order to make the antenna work in a specific frequency band, it is necessary to set the low-frequency resonance point and the high-frequency resonance point of the antenna, wherein the low-frequency resonance point of the antenna is designed in such a way that the branch units are respectively connected to both sides of the semicircular patch 111, the plane of the branch unit 113 and the plane of the semicircular patch 111 are in the same plane, the branch unit 113 includes a first branch unit 1131 and a second branch unit 1132, and a first gap is formed between the first branch unit 1131 and the first side of the semicircular patch 111 A second gap is formed between the second branch unit 1132 and the second side of the semicircular patch 111. Optionally, the first branch unit 1131 and the second branch unit 1132 are in an "L" shape. The first branch unit 1131 and the second branch unit 1132 are symmetrically arranged to form a low-frequency resonance point. When the current passes through the semicircular patch 111 and the two branch units, the current is largely concentrated on the main feed line 8 directly connected to the coaxial feeding port, the first branch unit 1131 and the second branch unit 1132.

[0081] In the embodiment of this specification, branch units 113 are respectively arranged on both sides of the semicircular patch 111 so that a low-frequency resonance point is formed when the current passes through the semicircular patch 111 and the branch unit 113, thereby completing the design of the low-frequency resonance point.

[0082] Furthermore, the varactor diode includes a first varactor diode 21 and a second varactor diode 22; the first varactor diode 21 is arranged in the first patch gap 1111, for connecting the semicircular patch 111 and the first branch unit 1131, and the second varactor diode 22 is arranged in the second patch gap 1112, for connecting the semicircular patch 111 and the second branch unit 1132; the first varactor diode 21 and the second varactor diode 22 are provided with a first bias circuit 4, and the first bias circuit 4 is connected to the semicircular patch 111.

[0083] Specifically, in order to make the operating frequency of the antenna controllable and to connect the branch unit 113 and the semicircular patch 111 at the same time, two varactor diodes 2 are provided, including a first varactor diode 21 and a second varactor diode 22. The first varactor diode 21 is arranged in the first gap to connect the first branch unit 1131 and the semicircular patch 111, and the second varactor diode 22 is arranged in the second gap to connect the second branch unit 1132 and the semicircular patch 111. In order to facilitate the control of the voltage of the first varactor diode 21 and the second varactor diode 22, the two varactor diodes are provided with a corresponding first bias circuit 4, the first bias circuit 4 is connected to the semicircular patch 111, and the voltage of the first bias circuit 4 is adjustable. By adjusting the voltage of the first bias circuit 4, the capacitance of the first varactor diode 21 and the second varactor diode 22 can be controlled. When the bias voltage at both ends of the varactor diode changes, the equivalent capacitance of the antenna changes accordingly, and the equivalent path length of the current passing through the dual-band microstrip patch 11 changes, thereby changing the frequency of the upper dual-band microstrip antenna, thereby achieving a frequency reconfigurable effect.

[0084] In the embodiment of the present specification, a varactor diode 2 is arranged in the gap formed by each branch unit 113 and the semicircular patch 111, and the voltage of the varactor diode 2 is changed by the first bias circuit 4 to change the equivalent electrical length of the antenna, thereby achieving frequency reconstruction of the antenna.

[0085] Furthermore, the antenna body 1 also includes: a dual-frequency microstrip patch 11 and a dielectric substrate 13; the dual-frequency microstrip patch 11 includes a circular patch 112, the circular patch 112 is connected to the semicircular patch 111, the semicircular patch 111, the circular patch and the branch unit 113 constitute the main radiation unit of the dual-frequency microstrip patch 11, and the main radiation unit is used to radiate or receive radio propagation energy; the dual-frequency microstrip patch 11 and the ground plate 12 are respectively arranged on two opposite surfaces of the dielectric substrate 13.

[0086] Specifically, the dual-frequency microstrip patch 11 and the ground plane 12 are respectively arranged on two opposite surfaces of the dielectric substrate 13. The dual-frequency microstrip patch 11 includes a main radiation unit, which is composed of a semicircular patch 111, a branch unit 113 and a circular patch 112. The circular patch 112 is connected to the semicircular patch 111.

[0087] In the embodiment of this specification, a dual-frequency microstrip patch 11 is provided so that the antenna has a main radiation unit and can radiate or receive radio propagation energy.

[0088] Furthermore, in order to enable the antenna radiation pattern to dynamically change the shape of its radiation or reception electromagnetic wave radiation pattern according to specific needs, four PIN diodes 3 are provided in a preferred embodiment of the specification, and therefore, the PIN diode 3 includes a first PIN diode 31, a second PIN diode 32, a third PIN diode 33 and a fourth PIN diode 34; the first PIN diode 31 and the third PIN diode 33 are arranged on the first side of the dual-frequency microstrip patch 11, and the second PIN diode 32 and the fourth PIN diode 34 are arranged on the second side of the dual-frequency microstrip patch 11; the first PIN diode 31 and the second PIN diode 32 are symmetrical to each other, and the third PIN diode 33 and the fourth PIN diode 34 are symmetrical to each other.

[0089] Specifically, the four PIN diodes 3 are evenly distributed on both sides of the dual-frequency microstrip patch 11, wherein the first PIN diode 31 and the third PIN diode 33 are arranged on the first side of the dual-frequency microstrip patch 11, the second PIN diode 32 and the fourth PIN diode 34 are arranged on the second side of the dual-frequency microstrip patch 11, and the first PIN diode 31 and the second PIN diode 32 are symmetrical to each other, and the second PIN diode 32 and the fourth PIN diode 34 are symmetrical to each other.

[0090] Furthermore, in order to facilitate the control of the working state of the PIN diode, each PIN diode 3 is correspondingly provided with a second bias circuit 5; the first PIN diode 31 and the corresponding second bias circuit 5, the second PIN diode 32 and the corresponding second bias circuit 5 are arranged on the surface of the dielectric substrate 13 facing the dual-frequency microstrip patch 11; the third PIN diode 33 and the corresponding second bias circuit 5, the fourth PIN diode 34 and the corresponding second bias circuit 5 are arranged on the surface of the dielectric substrate 13 facing the ground plate 12.

[0091] For details, see Figure 1, the first PIN diode 31 and the corresponding second bias circuit 5 are arranged on the surface of the dielectric substrate facing the dual-frequency microstrip patch 11, and the first PIN diode 31 and the corresponding second bias circuit 5 are connected through a rectangular wire, the second PIN diode 32 and the corresponding second bias circuit 5 are arranged on the surface of the dielectric substrate facing the dual-frequency microstrip patch 11, and the second PIN diode 32 and the corresponding second bias circuit 5 are connected through a rectangular wire; the third PIN diode 33 and the corresponding third bias circuit are arranged in the gap on the surface of the grounding plate 12, and are located on the surface of the dielectric substrate 13 facing the grounding plate 12, and the third PIN diode 33 and the corresponding second bias circuit 5 are connected through a rectangular wire, the fourth PIN diode 34 and the corresponding third bias circuit are arranged in the gap on the surface of the grounding plate 12, and are located on the surface of the dielectric substrate 13 facing the grounding plate 12, and the third PIN diode 33 and the corresponding second bias circuit 5 are connected through a rectangular wire. Wherein, the voltage of each second bias circuit 5 can be adjusted according to demand.

[0092] By setting a corresponding bias circuit for each PIN diode to control the working state of the PIN diode 3, the length of the gap on the surface of the ground plate 12 can be indirectly controlled, thereby realizing the reconstruction of the antenna pattern.

[0093] Furthermore, the dielectric substrate 13 is provided with a first through hole 6 and a second through hole 7 ; a connector is disposed in the first through hole 6 for connecting the first PIN diode 31 and the third PIN diode 33 , and a connector is disposed in the second through hole 7 for connecting the second PIN diode 32 and the fourth PIN diode 34 .

[0094] Specifically, two first through holes 6 are provided, and the first PIN diode 31 and the third PIN diode 33 are connected by disposing a connector in each first through hole 6 or plating a metal layer on the surface of the first through hole 6. Similarly, two second through holes 7 are also provided, and the second PIN diode 32 and the fourth PIN diode 34 are connected by disposing a connector in each second through hole 7 or plating a metal layer on the surface of the second through hole 7.

[0095] See also Figure 2 Through the connection between the first through hole 6 and the second through hole 7, the overall structure of the antenna can be equivalent to Figure 2 The structure in FIG. 1 is a structure in which the first PIN diode 31 and the third PIN diode 33 are located on the first side (left side in the figure) of the dual-band microstrip patch 11 and in the first floor gap 121 of the ground plate 12, and the second PIN diode 32 and the fourth PIN diode 34 are located on the second side (right side in the figure) of the dual-band microstrip patch 11 and in the second floor gap 121 of the ground plate 12.

[0096] The antenna is etched with a length of L on a finite ground plane. g That is, a gap of length L is etched on the antenna ground plane 12. g The floor slot 121 is coupled and fed by a microstrip line. The antenna has the characteristics of an end-fire pattern and the radiation direction is perpendicular to the patch and upward. The radiation fields of the slot mode and the dual-frequency microstrip patch 11 radiation mode are normalized and expressed as and , then the total radiation field obtained by the coupling of the two is shown in formula (5):

[0097] Formula (5)

[0098] In formula (5), It represents the ratio of power converted into slot mode and is related to the length of the slot. It is directly related to the antenna. When the floor gap 121 is short, the energy conversion from the patch to the slot mode is relatively weak, causing the antenna to mainly behave as a patch mode. As the length of the floor gap 121 increases, the energy converted into the slot mode gradually increases, the influence of the patch mode decreases accordingly, and the radiation effect of the slot mode begins to increase. Since the microstrip patch and the microstrip feeder have similar structures, the main difference lies in their respective characteristic impedances. Therefore, by designing a suitable microstrip patch structure above the dielectric substrate 13 and introducing a floor gap 121 on the ground plane 12 below it, the slot radiation mode can be effectively excited. This design method utilizes the electromagnetic coupling between the microstrip patch and the ground plane 12, and by adjusting the size and position of the gap, effective control of the slot mode radiation characteristics can be achieved.

[0099] The process of controlling the working mode and directional pattern of the antenna by means of PIN diode 3 is as follows:

[0100] See also Figure 3 , Figure 3 1 is a graph showing the variation of the S11 parameter with the bias voltage V0 of the varactor diode in a reconfigurable antenna based on slot coupling provided by an embodiment of the present specification when all four PIN diodes are connected. When the first PIN diode 31, the second PIN diode 32, the third PIN diode 33 and the fourth PIN diode 34 are all turned on, the antenna is equivalent to a dual-band frequency reconfigurable microstrip patch antenna, and the radiation pattern is vertical to the horizontal plane upward. The variation of the S11 of the antenna with the bias voltage V0 of the varactor diode is shown in FIG. Figure 3As shown, S11 is the return loss parameter of the antenna, which represents the impedance matching degree of the antenna. If S11 is smaller, the impedance matching degree is better and the antenna performance is better. Generally, S11 < -10dB is required. The dotted line in the figure is drawn based on the test data, and the solid line is drawn based on the simulation data. It can be seen that the larger the bias voltage V0 of the varactor diode, the more the two resonant frequencies move to the low frequency, and the simulation and measured results of the adjustable range of the antenna frequency at the low frequency are 2.12 ~ 2.53 GHz and 2.17 ~ 2.67 GHz respectively. The simulation and measured results of the adjustable range of the frequency at the high frequency are 4.44 ~ 5.55 GHz and 4.52 ~ 5.74 GHz respectively, and the impedance matching degree is relatively high.

[0101] See also Figure 4 , Figure 4 This is a radiation pattern of the antenna at low frequency when four PIN diodes in a reconfigurable antenna based on slot coupling are connected in one embodiment of this specification. It can be seen from the figure that the maximum radiation direction of the antenna on the E plane at low frequency is , the maximum radiation direction of the antenna in three dimensions for .

[0102] See also Figure 5 , Figure 5 This is a radiation pattern of the antenna at high frequency when four PIN diodes in a reconfigurable antenna based on slot coupling are connected in one embodiment of the present specification. It can be seen from the figure that the maximum radiation direction of the antenna at high frequency is When the antenna has the maximum three-dimensional radiation direction for .

[0103] See also Figure 6 , Figure 6 The S11 parameter of a reconfigurable antenna based on slot coupling provided in one embodiment of the present specification varies with the bias voltage V0 of the varactor diode when the first PIN diode is disconnected. When the second PIN diode 32 is disconnected (i.e. Figure 2 D4 in the figure is disconnected), which is equivalent to opening a floor gap 121 with a length of Lg=9mm on the right edge of the ground plane 12 surface, which stimulates the gap radiation mode of the antenna. The radiation direction is end-fire to the right. Due to the coupling between the microstrip radiation mode and the gap radiation mode, the antenna radiation pattern is deflected to the right. The S11 curve of the antenna is shown in Figure 4 As shown in the figure, it can be seen that the simulation and measured results of the frequency adjustment range of the antenna at the low frequency are 2.15 ~ 2.48 GHz and 2.19 ~ 2.53 GHz respectively; the simulation and measured results of the frequency adjustment range at the high frequency are 4.66 ~ 5.23 GHz and 4.71 ~ 5.29 GHz respectively.

[0104] See also Figure 7 , Figure 7 This is a radiation pattern of the antenna at low frequency when the first PIN diode in a reconfigurable antenna based on slot coupling is disconnected, provided in one embodiment of the present specification. It can be seen from the figure that the maximum radiation direction of the antenna at low frequency is When the antenna has the maximum three-dimensional radiation direction for .

[0105] See also Figure 8 , Figure 8 This is a radiation pattern of the antenna at high frequency when the first PIN diode in a reconfigurable antenna based on slot coupling is disconnected, provided in one embodiment of the present specification. It can be seen from the figure that the maximum radiation direction of the antenna at high frequency is When the antenna has the maximum three-dimensional radiation direction for .

[0106] See also Fig. 9 , Fig. 9 The S11 parameter of a reconfigurable antenna based on slot coupling provided by an embodiment of the present specification varies with the bias voltage V0 of the varactor diode when the second PIN diode is disconnected. When the first PIN diode 31 is disconnected (i.e. Figure 2 Similarly, when D1 in the circuit is disconnected, a floor gap 121 with a length of Lg = 9 mm is opened on the left edge of the ground plane 12, which stimulates the gap radiation mode of the antenna. The radiation direction is end-fire to the left, causing the antenna radiation pattern to deflect to the left. At this time, the S11 curve of the antenna is as follows: Fig. 9 As shown in the figure, it can be seen that the simulation and measured results of the frequency adjustment range of the antenna at the low frequency are 2.14 ~ 2.46 GHz and 2.13 ~ 2.49 GHz respectively; the simulation and measured results of the frequency adjustment range at the high frequency are 4.67 ~ 5.22 GHz and 4.73 ~ 5.24 GHz respectively.

[0107] See also Fig.10 , Fig.10 This is a radiation pattern of the antenna at low frequency when the second PIN diode in a reconfigurable antenna based on slot coupling is disconnected, provided in one embodiment of the present specification. It can be seen from the figure that the maximum radiation direction of the antenna at low frequency is When the antenna has the maximum three-dimensional radiation direction for .

[0108] See also Fig.11 , Fig.11This is a radiation pattern of the antenna at high frequency when the second PIN diode in a reconfigurable antenna based on slot coupling is disconnected, provided in one embodiment of the present specification. It can be seen from the figure that the maximum radiation direction of the antenna at high frequency is When the antenna has the maximum three-dimensional radiation direction for .

[0109] See also Fig.12 , Fig.12 : This is a graph showing the variation of the S11 parameter with the varactor bias voltage V0 in a reconfigurable antenna based on slot coupling provided by an embodiment of the present specification when all four PIN diodes are disconnected. The first PIN diode 31, the second PIN diode 32, the third PIN diode 33 and the fourth PIN diode 34 are all disconnected. The antenna has both the slot mode and the dual-frequency microstrip mode on both sides, but the electric field directions of the two differ by 180°. Therefore, the radiation field in the space above the dielectric substrate 13 will be coupled and destructively decoupled, while the radiation field in the space below will cross-overlap, causing the radiation pattern to become backward radiation, that is, downward radiation. At this time, the S11 curve of the antenna is as follows: Figure 6 As shown in the figure, it can be seen that the simulation and measured results of the frequency adjustment range at the low frequency are 2.15 ~ 2.50 GHz and 2.18 ~ 2.55 GHz respectively; the simulation and measured results of the frequency adjustment range at the high frequency are 4.64 ~ 5.19 GHz and 4.72 ~ 5.26 GHz respectively. When the antenna works in the above four states, the frequency points under different pattern reconstruction states are basically unchanged, and only the impedance matching changes. It can be seen that when the pattern is reconstructed, the S11 parameter of the antenna basically does not change, which well confirms the characteristic that the frequency remains unchanged under the pattern reconstruction.

[0110] See also Fig.13 , Fig.13 This is a radiation pattern of the antenna at low frequency when all four PIN diodes in a reconfigurable antenna based on slot coupling are disconnected, provided in one embodiment of the present specification. It can be seen from the figure that the maximum radiation direction of the antenna at low frequency is When the antenna has the maximum three-dimensional radiation direction for .

[0111] See also Fig.14 , Fig.14 This is a radiation pattern of the antenna at high frequency when all four PIN diodes in a reconfigurable antenna based on slot coupling are disconnected, provided in one embodiment of the present specification. It can be seen from the figure that the maximum radiation direction of the antenna at high frequency is When the antenna has the maximum three-dimensional radiation direction for , the antenna presents four good directional pattern reconfiguration characteristics.

[0112] It should be noted that Figures 3 to 14 In the figure, the dotted line is drawn based on the test data, and the solid line is drawn based on the simulation data. Since the directional diagram is a three-dimensional solid figure, Figure 4-Figure 5 , Figure 7-Figure 8 , Figure 10-11 , Figure 13-14 In any of the attached figures, the left and right figures are two orthogonal two-dimensional sections, the E plane (here the xoz plane is selected) and the H plane (here the yoz plane).

[0113] In the embodiment of this specification, since the floor gap 121 etched on the back of the ground plate 12 plays a key role in exciting the gap mode, the effective length of the floor gap 121 is controlled by loading a PIN diode, so that the microstrip patch mode can be coupled with the gap mode, thereby achieving directional pattern reconstruction performance.

[0114] Furthermore, the design of the high-frequency resonance point of the antenna is realized by the circular patch 112 , and a third patch gap 1121 is provided on the surface of the circular patch 112 . The third patch gap 1121 is axially symmetrical, and current flows through the circular patch 112 to form a high-frequency resonance point.

[0115] For details, see Figure 1 or Figure 3 A third patch gap 1121 is etched on the surface of the circular patch 112. The third patch gap 1121 is in a stacked shape with a diameter of the circular patch 112 as the axis of symmetry. By symmetrically slotting on both sides of the circular patch 112, the current path is changed, thereby forming a high resonant frequency point, so that the current is mainly concentrated near the first three patch gaps of the circular patch 112.

[0116] In the embodiment of the present specification, a third patch gap 1121 is etched on the circular patch 112 to change the current path and form a high-frequency resonance point. By setting the high-frequency resonance point and the low-frequency resonance point, the antenna works within a specific frequency range.

[0117] Furthermore, after the antenna structure is set, the antenna parameters need to be optimized so that the antenna can reach a suitable operating frequency band and achieve good directivity.

[0118] See also Fig.15 , Fig.15This is a curve simulation diagram of the change of parameter S11 with parameter L8 in a reconfigurable antenna based on slot coupling provided by an embodiment of the present specification, wherein S11 is the return loss parameter of the antenna, and L8 is the length of the branch unit 113. It can be seen from the figure that when the L8 value changes from small to large, the low frequency point gradually shifts to the left and reaches a better matching state, and the frequency point on the right side also undergoes a slight change. This is because the length L8 changes the length of the "L"-shaped branch, increases the effective electrical length of the antenna, and thereby reduces the resonant frequency.

[0119] See also Fig.16 , Fig.16 This is a curve simulation diagram of the parameter S11 in a reconfigurable antenna based on slot coupling according to an embodiment of this specification, where W3 is the width of the central branch of the circular patch. As can be seen from the figure, when the value changes from large to small, the low-frequency point changes very little, and the high-frequency point gradually moves to the low frequency. This is because as the value decreases, the length of the slot opened at the circular patch 112 becomes larger, and the antenna equivalent current length also increases, thereby reducing the high-frequency resonant frequency. Therefore, W3 can be used to adjust the resonant frequency and impedance matching characteristics at low frequencies.

[0120] Based on the influence of the above antenna parameter changes on the antenna working performance, the voltage and other parameters of the first bias circuit 4 and the second bias circuit 5 are adjusted to change the working state of the PIN diode and the varactor diode 2 so that the antenna reaches the best working state.

[0121] In the embodiment of this specification, two varactor diodes 2 are arranged on the basis of the antenna body 1, and the branch unit is connected to the semicircular patch 111 through the varactor diode 2, and the voltage of the varactor diode 2 is changed through the first bias circuit 4, thereby changing the equivalent electrical length of the antenna, and realizing the frequency reconfiguration of the antenna. In addition, a PIN diode 3 is arranged in the gap of the ground plate 12, and the on-off state of the PIN diode 3 is changed through the second bias circuit 5, which is equivalent to controlling the length of the gap on the surface of the ground plate 12, so that the gap mode and the patch mode are coupled to different degrees, realizing the working mode switching and directional pattern reconstruction of the antenna. The reconfigurable antenna provided in the embodiment of this specification has a simple structure, and the frequency can be adjusted according to the specific application scenario, and can be applied to a variety of scenarios, and the application is more flexible. In addition, the reconfigurable antenna provided in this specification can generate high-frequency resonance points and low-frequency resonance points without adding parasitic branches, which can prevent the antenna from being affected by the environment and have higher stability.

[0122] The following combination Fig.17 , a control method for a reconfigurable antenna based on slot coupling is provided in this specification. Among them, Fig.17A processing flow chart of a control method for a reconfigurable antenna based on slot coupling provided in an embodiment of the present specification is shown, which specifically includes the following steps.

[0123] Step 1702: Receive circuit control instructions.

[0124] Specifically, the circuit control instruction refers to an instruction issued by the user to change the parameters of different antenna structures, including a varactor diode 2 control instruction and a PIN diode 3 control instruction and corresponding adjustment parameter information. The adjustment parameter information may be a voltage value adjusted by a target bias circuit.

[0125] Step 1704: Determine a target bias circuit based on the circuit control instruction, and adjust the voltage of the target bias circuit.

[0126] Specifically, since in the antenna, the varactor diode 2 is controlled by the first bias circuit 4, and the second PIN diode 332 is controlled by the second bias circuit 5, it is necessary to determine the corresponding target bias circuit according to the specific type of the circuit control instruction. When the circuit control instruction is a varactor diode 2 control instruction, the target bias circuit is determined to be the first bias circuit 4, and when the circuit control instruction is a PIN diode 3 control instruction, the target bias circuit is determined to be the second bias circuit 5. After determining the target bias circuit, the voltage of the target bias circuit is adjusted according to the adjustment parameter information carried in the circuit control instruction, thereby controlling the PIN diode 3 or the varactor diode 2.

[0127] Step 1706: According to the voltage change of the target bias circuit, adjust the voltage of the varactor diode 2 and / or change the on-off state of the PIN diode 3, wherein the varactor diode 2 is used to reconstruct the antenna frequency and the PIN diode 3 is used to reconstruct the antenna radiation pattern.

[0128] Specifically, when the target bias circuit is the first bias circuit 4, based on the voltage of the first bias circuit 4, the voltage of the varactor diode 2 is controlled to change the equivalent capacitance of the antenna, and the equivalent path length flowing through the dual-frequency microstrip patch 11 changes, so that the frequency of the dual-frequency microstrip patch 11 changes to the target frequency; when the target bias circuit is the second bias circuit 5, based on the voltage of the second bias circuit 5, the voltage of the PIN diode 3 is controlled to change the equivalent length of the gap of the ground plate 12 of the antenna, so that the microstrip patch mode is coupled with the gap mode, thereby achieving the radiation pattern reconstruction performance. Specifically, through the first bias circuit 4, the bias voltage of the first varactor diode 21 and the second varactor diode 22 is controlled to gradually increase, the current equivalent path of the current passing through the dual-frequency microstrip patch 11 becomes longer, and the resonant frequency of the antenna gradually moves to the low frequency; on the contrary, through the first bias circuit 4, the bias voltage of the first varactor diode 21 and the second varactor diode 22 is controlled to gradually decrease, the current equivalent path of the current passing through the dual-frequency microstrip patch 11 becomes shorter, and the resonant frequency of the antenna gradually moves to the high frequency.

[0129] Furthermore, when the target bias circuit is the second bias circuit 5, it is necessary to further adjust the voltage value of the second bias circuit 5 according to the adjustment parameter information carried in the PIN diode 3 control instruction, so as to control the on or off state of the PIN diode 3. Specifically, when the four PIN diodes 3 are all in the on state, the antenna is equivalent to a dual-band frequency reconfigurable microstrip patch antenna, and the radiation pattern is vertical to the horizontal plane upward; when the second PIN diode 32 is disconnected, it is equivalent to opening a gap on the right edge of the surface of the ground plate 12, which stimulates the gap radiation mode of the antenna, and the radiation direction is end-fire to the right, The microstrip radiation mode is coupled with the slot radiation mode, causing the antenna radiation pattern to deflect to the right; when the first PIN diode 31 is disconnected, it is equivalent to opening a slot on the left edge of the ground plane 12 surface, which stimulates the slot radiation mode of the antenna, and the radiation direction is end-fire to the left, causing the antenna radiation pattern to deflect to the left; when all four PIN diodes are disconnected, the antenna has both the slot mode and the dual-frequency microstrip mode on both sides, but the electric field directions of the two are different, so the radiation field in the space above the substrate will be coupled and decomposed, while the radiation field in the space below will cross-overlap, causing the radiation pattern to become backward radiation, that is, downward radiation.

[0130] In the embodiments of this specification, a target bias circuit is determined by receiving a circuit control instruction, and based on the adjustment of the target bias circuit, the working state of the PIN diode 3 and / or the varactor diode 2 is controlled, thereby achieving frequency reconfiguration of the antenna and reconfiguration of the antenna's directional pattern.

[0131] Fig.18The block diagram of a computing device 1800 according to one embodiment of the present specification is shown. The components of the computing device 1800 include but are not limited to a memory 1810 and a processor 1820. The processor 1820 is connected to the memory 1810 via a bus 1830, and the database 1850 is used to store data.

[0132] The computing device 1800 also includes an access device 1840 that enables the computing device 1800 to communicate via one or more networks 1860. Examples of these networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or a combination of communication networks such as the Internet. The access device 1840 may include one or more of any type of network interface (e.g., a network interface card (NIC)) of wired or wireless, such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a world-wide interoperability for microwave access (Wi-MAX) interface, an Ethernet interface, a universal serial bus (USB) interface, a cellular network interface, a Bluetooth interface, and a near field communication (NFC).

[0133] In one embodiment of the present specification, the above components of the computing device 1800 and Fig.18 Other components not shown in the figure may also be connected to each other, for example, via a bus. It should be understood that Fig.18 The computing device structure block diagram shown is only for the purpose of illustration, and is not intended to limit the scope of this specification. Those skilled in the art can add or replace other components as needed.

[0134] The computing device 1800 may be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (e.g., a tablet computer, a personal digital assistant, a laptop computer, a notebook computer, a netbook, etc.), a mobile phone (e.g., a smart phone), a wearable computing device (e.g., a smart watch, smart glasses, etc.), or other types of mobile devices, or a stationary computing device such as a desktop computer or a personal computer (PC). The computing device 1800 may also be a mobile or stationary server.

[0135] The processor 1820 is used to execute the following computer program / instruction, which implements the steps of the control method of the reconfigurable antenna based on slot coupling when executed by the processor.

[0136] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the computing device embodiment, since it is basically similar to the control method embodiment of the reconfigurable antenna based on slot coupling, the description is relatively simple, and the relevant parts can be referred to the partial description of the control method embodiment of the reconfigurable antenna based on slot coupling.

[0137] An embodiment of the present specification further provides a computer-readable storage medium storing a computer program / instruction. When the computer program / instruction is executed by a processor, the steps of the control method of the reconfigurable antenna based on slot coupling are implemented.

[0138] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the computer-readable storage medium embodiment, since it is basically similar to the control method embodiment of the reconfigurable antenna based on slot coupling, the description is relatively simple, and the relevant parts can be referred to the partial description of the control method embodiment of the reconfigurable antenna based on slot coupling.

[0139] An embodiment of the present specification further provides a computer program product, including a computer program / instruction, which implements the steps of the control method of the reconfigurable antenna based on slot coupling when executed by a processor.

[0140] The above is a schematic scheme of a computer program product of this embodiment. It should be noted that the technical scheme of the computer program product and the technical scheme of the control method of the reconfigurable antenna based on slot coupling described above belong to the same concept, and the details not described in detail in the technical scheme of the computer program product can be referred to the description of the technical scheme of the control method of the reconfigurable antenna based on slot coupling described above.

[0141] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0142] The computer instructions include computer program codes, which may be in source code form, object code form, executable files or some intermediate forms, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of patent practice. For example, in some regions, according to patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0143] It should be noted that, for the convenience of description, the aforementioned method embodiments are all described as a series of action combinations, but those skilled in the art should be aware that the embodiments of this specification are not limited by the order of the actions described, because according to the embodiments of this specification, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of this specification.

[0144] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0145] The preferred embodiments of this specification disclosed above are only used to help explain this specification. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the embodiments of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of this specification, so that technicians in the relevant technical field can well understand and use this specification. This specification is only limited by the claims and their full scope and equivalents.

Claims

1. A reconfigurable antenna based on slot coupling, characterized in that: include: Antenna body (1), varactor diode (2) and PIN diode (3); The antenna body (1) comprises a semicircular patch (111), a branch unit (113) and a ground plate (12); There is a patch gap between the semicircular patch (111) and the branch unit (113), the varactor diode (2) is arranged in the patch gap, the varactor diode (2) connects the semicircular patch (111) and the branch unit (113), and a low-frequency resonance point is formed when current passes through the semicircular patch (111) and the branch unit (113); The varactor diode (2) is provided with a corresponding first bias circuit (4), and the first bias circuit (4) is used to adjust the voltage across the varactor diode (2) to reconstruct the antenna frequency; The antenna body (1) further comprises: a dual-frequency microstrip patch (11) and a dielectric substrate (13); The dual-frequency microstrip patch (11) comprises a circular patch (112), the circular patch (112) being connected to the semicircular patch (111), the semicircular patch (111), the circular patch (112) and the branch unit (113) constituting a main radiation unit of the dual-frequency microstrip patch (11), the main radiation unit being used to radiate or receive radio propagation energy; The dual-frequency microstrip patch (11) and the ground plane (12) are respectively arranged on two opposite surfaces of the dielectric substrate (13); A third patch gap (1121) is provided on the surface of the circular patch, the third patch gap (1121) is in an axisymmetric shape, and a current flows through the circular patch to form a high-frequency resonance point; A floor gap (121) is provided on the surface of the grounding plate (12), a PIN diode (3) is provided in the floor gap (121), the PIN diode (3) is provided with a corresponding second bias circuit (5), and the second bias circuit (5) is used to adjust the on-off state of the PIN diode (3) to reconstruct the antenna's directional pattern.

2. The reconfigurable antenna based on slot coupling according to claim 1, characterized in that: The branch unit (113) comprises a first branch unit (1131) and a second branch unit (1132), wherein the first branch unit (1131) and the second branch unit (1132) are respectively arranged on two sides of the semicircular patch (111) and are symmetrical to each other; The first branch unit (1131) and the first side of the semicircular patch (111) form a first patch gap (1111), the second branch unit (1132) and the second side of the semicircular patch (111) form a second patch gap (1112), and a low-frequency resonance point is formed when current flows through the semicircular patch (111), the first branch unit (1131) and the second branch unit (1132).

3. The reconfigurable antenna based on slot coupling according to claim 2, characterized in that: The varactor diode comprises a first varactor diode (21) and a second varactor diode (22); The first variable capacitance diode (21) is arranged in the first patch gap (1111) and is used to connect the semicircular patch (111) and the first branch unit (1131); the second variable capacitance diode (22) is arranged in the second patch gap (1112) and is used to connect the semicircular patch (111) and the second branch unit (1132); The first varactor diode (21) and the second varactor diode (22) are provided with a first bias circuit (4), and the first bias circuit (4) is connected to the semicircular patch (111).

4. The reconfigurable antenna based on slot coupling according to claim 1, characterized in that: The PIN diode (3) comprises a first PIN diode (31), a second PIN diode (32), a third PIN diode (33) and a fourth PIN diode (34); The first PIN diode (31) and the third PIN diode (33) are arranged on a first side of the dual-frequency microstrip patch (11), and the second PIN diode (32) and the fourth PIN diode (34) are arranged on a second side of the dual-frequency microstrip patch (11); The first PIN diode (31) and the second PIN diode (32) are symmetrical to each other, and the third PIN diode (33) and the fourth PIN diode (34) are symmetrical to each other.

5. The reconfigurable antenna based on slot coupling according to claim 4, characterized in that: Each of the PIN diodes (3) is correspondingly provided with a second bias circuit (5); The first PIN diode (31) and the corresponding second bias circuit (5), the second PIN diode (32) and the corresponding second bias circuit (5) are arranged on a surface of the dielectric substrate (13) facing the dual-frequency microstrip patch (11); The third PIN diode (33) and the corresponding second bias circuit (5), the fourth PIN diode (34) and the corresponding second bias circuit (5) are arranged on a surface of the dielectric substrate (13) facing the ground plate (12).

6. The reconfigurable antenna based on slot coupling according to claim 5, characterized in that: The dielectric substrate (13) is provided with a first through hole (6) and a second through hole (7); A connector is disposed in the first through hole (6) for connecting the first PIN diode (31) and the third PIN diode (33), and a connector is disposed in the second through hole (7) for connecting the second PIN diode (32) and the fourth PIN diode (34).

7. A control method for a slot-coupling-based reconfigurable antenna, applied to the slot-coupling-based reconfigurable antenna according to any one of claims 1 to 6, characterized in that: include: receiving circuit control instructions; determining a target bias circuit based on the circuit control instruction, and adjusting a voltage of the target bias circuit; According to the voltage change of the target bias circuit, the voltage of the varactor is adjusted and / or the on-off state of the PIN diode is changed, wherein the varactor is used to reconstruct the antenna frequency and the PIN diode is used to reconstruct the antenna pattern.

8. A computing device, characterized in that include: Memory and processor; The memory is used to store computer programs / instructions, and the processor is used to execute the computer programs / instructions. When the computer programs / instructions are executed by the processor, the steps of the control method of the reconfigurable antenna based on slot coupling according to claim 7 are implemented.

9. A computer-readable storage medium storing a computer program / instruction, characterized in that: When the computer program / instruction is executed by a processor, the steps of the control method of the reconfigurable antenna based on slot coupling described in claim 7 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the steps of the control method of the reconfigurable antenna based on slot coupling described in claim 7 are implemented.

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