Antenna decoupling structure, antenna array and communication equipment

Abstract

The embodiment of the invention provides an antenna decoupling structure, an antenna array and communication equipment, which are used for improving the problem of mutual coupling of antennas. The antenna decoupling structure comprises a dielectric plate, two scatterers and a load. The two scatterers are arranged on the first surface of the dielectric plate and are oppositely arranged along a first direction, and the first direction is parallel to the first surface. The load is electrically connected between the two scatterers, the load and the two scatterers form a resonant structure with an opening, and the opening is located between the two scatterers. The antenna decoupling structure provided by the embodiment of the invention can be applied to an antenna array, and the antenna array can be applied to communication equipment, so that the problem of mutual coupling of antennas is solved, and the communication efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of wireless communication technology, and in particular, to an antenna decoupling structure, an antenna array, and a communication device. Background Art

[0002] Antenna arrays are required in communication equipment. Antenna arrays include transmitting antennas and receiving antennas. During bidirectional data transmission, there is strong electromagnetic energy coupling between the transmitting antenna and the receiving antenna, which can also be referred to as antenna mutual coupling. The main effects of antenna mutual coupling include: reduced antenna gain and radiation efficiency, reduced capacity of multiple-input multiple-output (MIMO) channels, unsatisfactory amplitude / phase control of smart antennas and multi-beamforming, and deterioration of isolation between antennas. Therefore, it is of great significance to achieve decoupling of antenna arrays. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide an antenna decoupling structure, an antenna array and a communication device, which are used to improve the antenna mutual coupling problem.

[0004] In order to achieve the above purpose, the present application provides the following solutions:

[0005] On the one hand, an antenna decoupling structure is provided, comprising a dielectric plate, two scatterers and a load. The two scatterers are arranged on a first surface of the dielectric plate and are arranged opposite to each other along a first direction, wherein the first direction is parallel to the first surface. The load is electrically connected between the two scatterers, and the load and the two scatterers form a resonant structure with an opening, wherein the opening is located between the two scatterers.

[0006] The antenna decoupling structure provided in the embodiment of the present application can adjust the resonant frequency of the resonant structure by adjusting the parameters of the load, that is, adjust the resonant frequency of the entire antenna decoupling structure. In this way, the amount of energy obtained by the antenna decoupling structure from the antenna can be adjusted by changing the relative relationship between the resonant frequency of the antenna decoupling structure and the resonant frequency of the antenna. For example, when the initial coupling of the antenna is relatively strong, the resonant frequency of the antenna decoupling structure can be adjusted to be closer to the resonant frequency of the antenna (that is, the difference between the two is small), so that the antenna decoupling structure can obtain more energy from the antenna to offset the strong initial coupling between the transmitting and receiving antennas; and when the initial coupling of the antenna is relatively weak, the resonant frequency of the antenna decoupling structure can be adjusted to deviate further from the resonant frequency of the antenna (that is, the difference between the two is large), so that the antenna decoupling structure can obtain less energy from the antenna to offset the weak initial coupling between the transmitting and receiving antennas. That is, it is equivalent to introducing equivalent coupling between the transmitting and receiving antennas to offset the spatial coupling between the transmitting and receiving antennas, thereby achieving the purpose of decoupling (or decoupling), such as improving antenna gain and radiation efficiency, multiple-input multiple-output (MIMO) channel capacity, smart antennas and amplitude / phase control of multi-beamforming, and resulting in isolation between antennas.

[0007] In some embodiments, the load includes a capacitor. In this example, the resonant frequency of the resonant structure can be changed by changing the capacitance of the capacitor, and the structure is relatively simple and the cost is low.

[0008] In some embodiments, the capacitor is an adjustable capacitor. Such a design facilitates the adjustment of the capacitance value during use, so as to adjust the resonant frequency of the resonant structure and achieve a better decoupling effect.

[0009] In some embodiments, the load includes a resistor. In this example, the resonant frequency of the resonant structure can be changed by changing the resistance value of the resistor, and the structure is relatively simple and the cost is low.

[0010] In some embodiments, the resistor is an adjustable resistor. Such a design facilitates the adjustment of the resistor value during use, so as to adjust the resonant frequency of the resonant structure and achieve a better decoupling effect.

[0011] In some embodiments, the number of the resonant structures is two, and the openings of the two resonant structures are arranged in opposite directions along a second direction; the second direction is parallel to the first surface and intersects with the first direction. The electric dipole moments generated by the two resonant structures with openings placed in opposite directions will cancel each other out, thereby avoiding the introduction of unnecessary coupling while removing antenna coupling using the antenna decoupling structure, thereby effectively improving communication efficiency.

[0012] In some embodiments, the two scatterers are symmetrically arranged along a second direction, and the second direction is parallel to the first surface and intersects the first direction. Such an arrangement makes the structures of the two scatterers more neat and symmetrical, and is less likely to generate unnecessary clutter, thereby achieving a good decoupling effect.

[0013] In some embodiments, the two scatterers are symmetrically arranged along the first direction, so that the structures of the two scatterers are more neat and symmetrical, and unnecessary clutter is not easily generated, thereby achieving a good decoupling effect.

[0014] In some embodiments, each of the scatterers includes a first part and a second part; the first part includes a first end and a second end, the first end is closer to another scatterer than the second end; the first end is connected to the load, and the second end is connected to the target part of the second part; the second part includes a third end and a fourth end opposite to each other, and the target part is located between the third end and the fourth end. Thus, a resonant structure with two openings placed in opposite directions can be formed, and a good decoupling effect can be achieved. Among them, the space between the two third ends can be regarded as one opening, and the space between the two fourth ends can be regarded as another opening.

[0015] In some embodiments, the first portion is parallel to the first direction, the second portion is parallel to the second direction, and the second direction is parallel to the first surface and intersects the first direction. In this way, the structure of the scatterer is more neat and unnecessary clutter is not easily generated.

[0016] In some embodiments, each of the scatterers further includes a third part and a fourth part; one end of the third part is connected to the third end, and the other end extends in a direction close to the other scatterer; one end of the fourth part is connected to the fourth end, and the other end extends in a direction close to the other scatterer; wherein, in the two scatterers, the opening of one resonant structure is defined between the two third parts opposite to each other along the first direction, and the opening of another resonant structure is defined between the two fourth parts opposite to each other along the first direction. Thus, a resonant structure with two openings placed opposite to each other can be formed, and a good decoupling effect can be achieved.

[0017] On the other hand, an antenna array is provided, comprising: a floor, a transmitting antenna, a receiving antenna and a first antenna decoupling structure; the transmitting antenna and the receiving antenna are arranged on the floor, the first antenna decoupling structure is located between the transmitting antenna and the receiving antenna, and the first antenna decoupling structure is the antenna decoupling structure described in any of the above embodiments. With such an arrangement, the electromagnetic energy coupling between the transmitting antenna and the receiving antenna can be eliminated through the first antenna decoupling structure.

[0018] In some embodiments, in the first antenna decoupling structure: the dielectric plate is parallel to the floor, the two scatterers are arranged relative to each other along a third direction, and the third direction is parallel to the floor and intersects with the line between the transmitting antenna and the receiving antenna. With such an arrangement, the co-polarization isolation between the transmitting antenna and the receiving antenna (such as the signal isolation between the first plates of the transmitting and receiving antennas and the signal isolation between the second plates of the transmitting and receiving antennas) is more significantly improved, thereby achieving a better decoupling effect.

[0019] In some embodiments, the first antenna decoupling structure is located in the middle of the area between the transmitting antenna and the receiving antenna. This arrangement can better prevent the signals between the transmitting antenna and the receiving antenna from interfering with each other, and can achieve a better decoupling effect.

[0020] In some embodiments, the antenna array further includes a second antenna decoupling structure, the second antenna decoupling structure is the antenna decoupling structure described in any of the previous embodiments; the first antenna decoupling structure is provided with the second antenna decoupling structure on at least one side along a third direction, the third direction is parallel to the floor and intersects with the line connecting the transmitting antenna and the receiving antenna. The second antenna decoupling structure can play a good auxiliary role and further improve the mutual coupling problem between the transmitting antenna and the receiving antenna.

[0021] In some embodiments, there are multiple transmitting antennas and multiple receiving antennas; multiple dual-polarized transmitting antennas are arranged in sequence along the third direction, and multiple receiving antennas are arranged in sequence along the third direction; wherein one dual-polarized transmitting antenna and one dual-polarized receiving antenna are opposite to each other along the third direction to form an antenna unit; two adjacent antenna units share one second antenna decoupling structure. Such a configuration can achieve a good decoupling effect on the one hand, and is conducive to simplifying the structure and shortening the arrangement distance between antenna units on the other hand.

[0022] In some embodiments, in the second antenna decoupling structure: the dielectric plate is parallel to the floor, and the two scatterers are arranged relative to each other along the third direction. With such an arrangement, the polarization isolation between the transmitting antenna and the receiving antenna (such as the signal isolation between the first plate of the transmitting antenna and the second plate of the receiving antenna, and the signal isolation between the second plate of the transmitting antenna and the first plate of the receiving antenna) is improved more significantly, thereby achieving a better decoupling effect.

[0023] In some embodiments, the antenna array further includes: a third antenna decoupling structure, the third antenna decoupling structure being the antenna decoupling structure described in any of the previous embodiments; the third antenna decoupling structure is provided on at least one side of the transmitting antenna along a third direction, the third direction being parallel to the floor and intersecting the line connecting the transmitting antenna and the receiving antenna. The third antenna decoupling structure can also play a certain auxiliary role, further improving the mutual coupling problem between the transmitting antenna and the receiving antenna.

[0024] In some embodiments, the antenna array further includes: a fourth antenna decoupling structure, the fourth antenna decoupling structure being the antenna decoupling structure described in any of the previous embodiments; the fourth antenna decoupling structure is provided on at least one side of the receiving antenna along a third direction, the third direction being parallel to the floor and intersecting the line connecting the transmitting antenna and the receiving antenna. The fourth antenna decoupling structure can also play a certain auxiliary role, further improving the mutual coupling problem between the transmitting antenna and the receiving antenna.

[0025] In some embodiments, when the antenna array includes a third antenna decoupling structure, in the third antenna decoupling structure, the dielectric plate is perpendicular to the floor, the two scatterers are arranged opposite to each other along a fourth direction, and the fourth direction is parallel to the connection line between the transmitting antenna and the receiving antenna. In this way, a better auxiliary decoupling effect can be achieved.

[0026] In some embodiments, when the antenna array includes a fourth antenna decoupling structure, in the fourth antenna decoupling structure, the dielectric plate is perpendicular to the floor, the two scatterers are arranged opposite to each other along a fourth direction, and the fourth direction is parallel to the connection line between the transmitting antenna and the receiving antenna. In this way, a better auxiliary decoupling effect can be achieved.

[0027] In some embodiments, when the antenna array includes a third antenna decoupling structure and there are multiple transmitting antennas, two adjacent transmitting antennas share one third antenna decoupling structure. This arrangement can achieve a good decoupling effect on the one hand, and is conducive to simplifying the structure and shortening the arrangement distance between transmitting antennas on the other hand.

[0028] In some embodiments, when the antenna array includes a fourth antenna decoupling structure and there are multiple receiving antennas, two adjacent receiving antennas share one third antenna decoupling structure. This arrangement can achieve a good decoupling effect on the one hand, and is conducive to simplifying the structure and shortening the arrangement distance between receiving antennas on the other hand.

[0029] In some embodiments, the transmitting antenna and the receiving antenna are both dual-polarized antennas. The antenna decoupling structure in the embodiment of the present application can effectively improve the mutual coupling problem between dual-polarized antennas.

[0030] In another aspect, a communication device is provided, comprising: the antenna array described in any of the above embodiments. The communication device provided in the embodiment of the present application has all the beneficial effects of the antenna array because it has the antenna array described in any of the above embodiments, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A structural block diagram of a communication device provided in an embodiment of the present application;

[0032] Figure 2 A structural diagram of an antenna array provided in an embodiment of the present application;

[0033] Figure 3 for Figure 2 A top view of the antenna array;

[0034] Figure 4 A structural diagram of another antenna array provided in an embodiment of the present application;

[0035] Figure 5 for Figure 2-Figure 4 The structural diagram of the antenna in FIG.

[0036] Figure 6 A structural diagram of an antenna decoupling structure provided in an embodiment of the present application;

[0037] Figure 7 A structural diagram of another antenna decoupling structure provided in an embodiment of the present application;

[0038] Figure 8 A schematic diagram of an antenna decoupling structure including a load provided in an embodiment of the present application;

[0039] Fig. 9 A schematic diagram of an antenna decoupling structure including another load provided in an embodiment of the present application;

[0040] Fig.10 A schematic diagram of an antenna decoupling structure including another load provided in an embodiment of the present application;

[0041] Fig.11 A schematic diagram of an antenna decoupling structure including another load provided in an embodiment of the present application;

[0042] Fig.12 A structural diagram of another antenna array provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0044] In the following, the terms "first", "second", etc. are used only for convenience of description and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0045] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "electrical connection" may refer to a direct electrical connection or an indirect electrical connection via an intermediate medium.

[0046] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0047] In the embodiments of the present application, "and / or" describes the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B may be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0048] In the embodiments of the present application, directional indications such as up, down, left, right, front, and back, etc., used to explain the structure and movement of different components in the present application are relative. These indications are appropriate when the components are in the positions shown in the figures. However, if the description of the component position changes, then these directional indications will also change accordingly.

[0049] The embodiments of the present application provide a communication device. In some examples, the communication device may be a terminal, such as a mobile phone, a tablet computer, etc. In other examples, the communication device may be a base station, such as a 4G base station, a 5G base station, a 6G base station, etc. Figure 1 For a structural block diagram of a communication device provided in an embodiment of the present application, please refer to Figure 1, the communication device 1000 includes an antenna array 200. The antenna array 200 includes a transmitting antenna and a receiving antenna. The antenna array 200 can adopt a full-duplex (FD) communication mode. When transmitting data, the transmitting antenna and the receiving antenna need to use the same time slot or frequency slot for sending and receiving. Therefore, there will be self-interference (SI) between the transmitting antenna (such as the transmitting end of the downlink) and the receiving antenna (such as the receiving end of the uplink), that is, there is a strong electromagnetic energy coupling (referred to as antenna mutual coupling). At present, antenna mutual coupling has become a major obstacle to the development of communication equipment. For example, in some examples, the numerical difference between the radiated power of the transmitting antenna and the signal power received by the receiving antenna is very large, and the expected signal at the receiving end is very weak. Therefore, the antenna mutual coupling problem seriously affects the communication efficiency of the communication equipment.

[0050] Based on the above technical problems, the embodiments of the present application also provide an antenna decoupling structure and an antenna array. The antenna decoupling structure can be applied in an antenna array to reduce the electromagnetic energy coupling between a transmitting antenna and a receiving antenna, which is beneficial to improving communication efficiency and shortening the setting distance between the transmitting antenna and the receiving antenna.

[0051] Figure 2 A structural diagram of an antenna array 200 provided in an embodiment of the present application, Figure 3 for Figure 2 A top view of the antenna array 200 is shown in FIG. Figure 4 FIG. 2 is a structural diagram of another antenna array 200 provided in an embodiment of the present application. Figures 2 to 4 As shown, the antenna array 200 may include a transmitting antenna 210, a receiving antenna 220, a floor 230 and an antenna decoupling structure 100. In this article, antenna may refer to the transmitting antenna 210 or the receiving antenna 220; antenna mutual coupling refers to the electromagnetic energy coupling between the transmitting antenna 210 and the receiving antenna 220; the transceiver antenna includes both the transmitting antenna 210 and the receiving antenna 220, and the transceiver antenna here may also be referred to as an antenna unit.

[0052] The transmitting antenna 210 and the receiving antenna 220 may be disposed on the floor 230. For example, a hole may be opened on the floor 230 (such as a metal floor), and a signal line may be extended through the hole on the floor 230 to connect the antenna to feed the antenna. Figure 2 and Figure 3 In some examples, the opening may be located below the corresponding antenna (in this case, the direction of the antenna close to the floor 230 is defined as the bottom, and the direction of the antenna away from the floor 230 is defined as the top).

[0053] Figure 5 for Figure 2-Figure 4 Structural diagram of the antenna in . Figure 5 The antenna 20 in the figure may be the aforementioned transmitting antenna 210, or the aforementioned receiving antenna 220. Exemplarily, the antenna 20 may be a dual-polarized antenna. In some embodiments, the antenna 20 may include a support plate 201, a ±45-degree polarized radiation patch 202, and a balun feeder 203. The support plate 201 may include a first plate portion and a second plate portion that intersect, a +45-degree polarized radiation patch 202 is attached to a side surface of the first plate portion, a -45-degree polarized radiation patch 202 is attached to a side surface of the second plate portion, a balun feeder 203 is disposed on the other side surface of the first plate portion and electrically coupled with the +45-degree polarized radiation patch 202, and another balun feeder 203 is disposed on the other side surface of the second plate portion and electrically coupled with the -45-degree polarized radiation patch 202. The coaxial line (i.e., the aforementioned signal line) may be extended through the opening on the floor 230 to connect the balun feeder 203 of the antenna to feed the antenna 20. The first plate portion and the +45 degree polarized radiation patch 202 thereon may be referred to as the first plate 2001 (eg Figure 3 As shown), the second plate portion and the -45 degree polarized radiation patch 202 located thereon are called the second plate 2002 (as shown Figure 3 The crossing angle between the first electrode plate 2001 and the second electrode plate 2002 may be 90° (as shown in FIG. Figure 3 shown).

[0054] For example, see Figure 3 and Figure 5 The plate (first plate 2001 or second plate 2002) of the antenna 20 includes an extension portion 20a and a bent portion 20b. The first end of the extension portion 20a can be connected to the floor 230, and the second end of the extension portion 20a extends away from the floor 230. One end of the bent portion 20b is connected to the second end of the extension portion 20a, and the other end is bent toward the side close to the floor 230, and a groove is formed between the bent portion 20b and the extension portion 20a. In some examples, such as Figure 5 As shown, each pole plate of the antenna 20 may include two symmetrical bending portions 20b (and may also include two symmetrical extension portions 20a). This arrangement can reduce the horizontal size of the antenna 20 (such as the maximum size in the direction parallel to the floor 230) on the one hand, and increase the vertical current on the other hand, which is beneficial to regulating the coupling between the antenna 20 and the antenna decoupling structure 100.

[0055] Two specific examples of antenna arrangement in an antenna array are provided below.

[0056] Antenna arrangement example 1: Figure 2 and Figure 3As shown, it includes 1*2 antennas, that is, a transmitting antenna 210 and a receiving antenna 220 spaced apart along the fourth direction constitute an antenna unit 300. The antenna frequency band is set to 1.7GHz-1.9GHz, the wavelength corresponding to the center frequency 1.8GHz is about 167mm, and the spacing between the transmitting antenna 210 and the receiving antenna 220 is 120mm, that is, 0.72 times the wavelength. Figure 5 The support plate 201 can be made of Rogers RO3003 material, which is a polytetrafluoroethylene (PTFE) composite material with ceramic fillers added, and its dielectric constant has extremely high temperature stability. The thickness of the support plate 201 can be 0.29 mm, and the highest point can be 39 mm away from the floor 230, which is 0.23 times the wavelength. The radiation patch (i.e., the ±45 degree polarized radiation patch 202) can be printed on the support plate. The radiation patch is located at the part of the bending portion 20b, and the size along the direction perpendicular to the floor 230 can be 19.8 mm, and the end of this part (i.e., the end close to the floor 230) can be 13.3 mm away from the floor 230.

[0057] Antenna arrangement example 2: Figure 3 As shown, it includes 2*2 antennas, that is, a transmitting antenna 210 and a receiving antenna 220 spaced apart along the fourth direction constitute an antenna unit 300, and the two antenna units 300 are spaced apart along the third direction. The antenna frequency band is set to 1.7GHz-1.9GHz, and the wavelength corresponding to the center frequency 1.8GHz is about 167mm. The distance between the transmitting antenna 210 and the receiving antenna 220 is 120mm, which is 0.72 times the wavelength. The distance between the transmitting antenna 210 and the transmitting antenna 210 is 75mm, which is 0.45 times the wavelength. The distance between the receiving antenna 220 and the receiving antenna 220 is 75mm, which is 0.45 times the wavelength. Similarly, refer to Figure 5 The support plate 201 can be made of Rogers RO3003 material, which is a polytetrafluoroethylene (PTFE) composite material with ceramic fillers added, and its dielectric constant has extremely high temperature stability. The thickness of the support plate 201 can be 0.29 mm, and the highest point can be 39 mm away from the floor 230, which is 0.23 times the wavelength. The radiation patch (i.e., the +45 degree polarized radiation patch 202) can be printed on the support plate. The radiation patch is located at the part of the bending portion 20b, and the size along the direction perpendicular to the floor 230 can be 19.8 mm, and the end of this part (i.e., the end close to the floor 230) can be 13.3 mm away from the floor 230.

[0058] It can be understood that the above two examples are only illustrated with 1*2 antennas and 2*2 antennas, and the present application can also be applied to antenna arrays arranged in other ways, such as including more antenna units 300. In addition, the antenna unit 300 is not limited to including only one transmitting antenna 210 and one receiving antenna 220. In some examples, for example, two transmitting antennas 210 can be arranged on both sides of a receiving antenna 220, and the three constitute an antenna unit 300. However, no matter how it is set, the antenna decoupling structure 100 provided in the embodiment of the present application can be set at a position such as between the transmitting antenna 210 and the receiving antenna 220, between the transmitting antenna 210 and the transmitting antenna 210, and between the receiving antenna 220 and the receiving antenna 220 (for example Figure 2 and Figure 3 The embodiment shown in the figure) achieves a decoupling effect, improves communication efficiency, and helps to shorten the setting distance between the transmitting antenna 210 and the receiving antenna 220.

[0059] The antenna decoupling structure 100 provided in an embodiment of the present application is described in detail below.

[0060] See also Figure 6 and Figure 7 , Figure 6 A structural diagram of an antenna decoupling structure 100 provided in an embodiment of the present application, Figure 7A structural diagram of another antenna decoupling structure 100 provided in an embodiment of the present application. The antenna decoupling structure 100 includes a dielectric plate 110, two scatterers 120 and a load 130. The two scatterers 120 are arranged on the first surface a1 of the dielectric plate 110 and are arranged opposite to each other along a first direction, and the first direction is parallel to the first surface a1. The load 130 is electrically connected between the two scatterers 120, and the load 130 and the two scatterers 120 form a resonant structure with an opening, and the opening is located between the two scatterers 120. The antenna decoupling structure 100 provided in an embodiment of the present application can adjust the resonant frequency of the resonant structure by adjusting the parameters of the load 130, that is, adjust the resonant frequency of the entire antenna decoupling structure 100. In this way, the amount of energy obtained by the antenna decoupling structure 100 from the antenna can be adjusted by changing the relative relationship between the resonant frequency of the antenna decoupling structure 100 and the resonant frequency of the antenna. For example, when the initial coupling of the antenna is relatively strong, the resonant frequency of the antenna decoupling structure 100 can be adjusted to be closer to the resonant frequency of the antenna (i.e., the difference between the two is small), so that the antenna decoupling structure 100 can obtain more energy from the antenna to offset the strong initial coupling between the transmitting and receiving antennas; and when the initial coupling of the antenna is relatively weak, the resonant frequency of the antenna decoupling structure 100 can be adjusted to be further away from the resonant frequency of the antenna (i.e., the difference between the two is large), so that the antenna decoupling structure 100 can obtain less energy from the antenna to offset the weak initial coupling between the transmitting and receiving antennas. That is, it is equivalent to introducing equivalent coupling between the transmitting and receiving antennas to offset the spatial coupling between the transmitting and receiving antennas, thereby achieving the purpose of decoupling (or decoupling).

[0061] Exemplarily, the dielectric plate 110 can be made of FR4 material. The main components of FR4 material are glass fiber and epoxy resin. Glass fiber is an excellent reinforcing material with high strength, high modulus, corrosion resistance, non-conductivity and other characteristics. Epoxy resin is a polymer material with excellent adhesion, mechanical properties, heat resistance and electrical properties. The combination of glass fiber and epoxy resin forms a FR4 material with excellent comprehensive properties. As a result, the dielectric plate 110 has good mechanical (such as high strength, high modulus and excellent impact resistance, not easy to deform, not easy to crack, and can withstand large external forces and pressures), electrical (such as having good insulation and heat resistance, and can also withstand high voltage and current), chemical (such as having excellent corrosion resistance and chemical resistance, can be used in harsh environments such as acid, alkali, solvents) and thermal properties (such as having good high temperature resistance, thermal expansion resistance and thermal conductivity, can work stably in high temperature environments).

[0062] Exemplarily, the scatterer 120 may include a metal layer, such as a copper layer. The scatterer 120 may be disposed on the first surface a1 of the dielectric plate 110 by attachment or printing. In some examples, the scatterer 120 may be a parasitic scatterer. The scatterer 120 has a passive scattering property, which may increase the dispersivity of the antenna electromagnetic wave energy, realize the traction of the beam signal, and achieve a better decoupling effect.

[0063] Exemplarily, the load 130 may be a circuit element such as a capacitor, an inductor, or a resistor, and any one of these circuit elements may be selected, or two or more of these circuit elements may be selected and connected in series or in parallel between the two scatterers 120 .

[0064] Figure 8 A schematic diagram of an antenna decoupling structure including a load provided in an embodiment of the present application, Fig. 9 A schematic diagram of an antenna decoupling structure including another load provided in an embodiment of the present application, Fig.10 A schematic diagram of an antenna decoupling structure including another load provided in an embodiment of the present application, Fig.11 A schematic diagram of an antenna decoupling structure including another load provided in an embodiment of the present application. Figures 8 to 11 The loads in some embodiments of the present application are introduced.

[0065] In some examples, such as Figure 8 As shown, the load 130 includes a capacitor 1301. At this time, the two capacitor plates of the capacitor 1301 are respectively connected to the two scatterers 120 to form a resonant structure, and the equivalent circuit of the resonant structure includes at least an equivalent capacitor and an equivalent inductor. In this example, the resonant frequency of the resonant structure can be changed by changing the capacitance value of the capacitor, and the structure is relatively simple and the cost is low.

[0066] In some possible implementations, capacitor 1301 is an adjustable capacitor. Such a design facilitates adjustment of the capacitance value during use, so as to adjust the resonant frequency of the resonant structure and achieve a better decoupling effect.

[0067] In some examples, such as Fig. 9 As shown, the load 130 includes a resistor 1302. At this time, the two ends of the resistor 1302 are respectively connected to the two scatterers 120 to form a resonant structure, and the equivalent circuit of the resonant structure includes at least an equivalent capacitor, an equivalent inductor, and an equivalent resistor. In this example, the resonant frequency of the resonant structure can be changed by changing the resistance value of the resistor, and the structure is relatively simple and the cost is low.

[0068] In some possible implementations, the resistor 1302 is an adjustable resistor. Such a design facilitates adjustment of the resistance value during use, so as to adjust the resonant frequency of the resonant structure and achieve a better decoupling effect.

[0069] In some examples, such as Figure 7 and Figure 8 As shown, the load 130 includes a capacitor 1301 and a resistor 1302. At this time, the capacitor 1301 and the resistor 1302 can be connected in series, that is, Fig.10 Alternatively, capacitor 1301 and resistor 1302 may also be connected in parallel, as shown in Fig.11 As shown. In this example, the equivalent circuit of the resonant structure formed by the load 130 and the two scatterers 120 includes at least an equivalent capacitor, an equivalent inductor, and an equivalent resistor. In this example, the resonant frequency of the resonant structure LC can be changed by changing the capacitance value of the capacitor and / or the resistance value of the resistor, and the structure is relatively simple. Similarly, the capacitor here can also be an adjustable capacitor, and the resistor here can also be an adjustable resistor. Among them, Fig.10 The embodiment is more flexible. By connecting the capacitor 1301 and the resistor 1302 in series, the whole device can be equivalent to an inductor or a capacitor as needed to adapt to a dynamic electromagnetic coupling environment.

[0070] The above-mentioned adjustable capacitor and adjustable resistor can be adjusted by an adjusting device connected thereto. For example, the adjusting device may include a field programmable gate array (FPGA) control board.

[0071] return Figure 6 and Figure 7 , the following combination Figure 6 and Figure 7 , the scatterer 120 in some embodiments of the present application is described in detail. And, for the convenience of description, it is defined that the first direction and the second direction are both parallel to the first surface a1, and the first direction intersects the second direction. In some examples, the first direction may be perpendicular to the second direction.

[0072] For example, Figure 6 and Figure 7 As shown, there are two resonant structures, and the openings of the two resonant structures are arranged in opposite directions along the second direction. The electric dipole moments generated by the two resonant structures with openings arranged in opposite directions will cancel each other out, thereby avoiding the introduction of unnecessary coupling while removing the antenna coupling by using the antenna decoupling structure 100, so as to effectively improve the communication efficiency. Among them, the openings of the two resonant structures arranged in opposite directions can be located on the same straight line along the second direction (such as Fig. 9 and Fig.10 As shown), they may also be staggered in the second direction, and this application does not impose any limitation on this.

[0073] In some embodiments, Figure 6 As shown, each scatterer 120 includes a first part 1210 and a second part 1220. The first part 1210 includes a first end 1211 and a second end 1212, and the first end 1211 is closer to another scatterer 120 than the second end 1212. The first end 1211 is connected to the load 130, and the second end 1212 is connected to the target part Q of the second part 1220. The second part 1220 includes a third end 1221 and a fourth end 1222 opposite to each other, and the target part Q is located between the third end 1221 and the fourth end 1222. In some examples, the target part Q is located at the middle position between the third end 1221 and the fourth end 1222, that is, the distance from the target part Q to the third end 1221 is equal to the distance from the target part Q to the fourth end 1222. Thus, a resonant structure with two openings placed in opposite directions can be formed, and a good decoupling effect can be achieved. Among them, the space between the two third ends 1221 can be regarded as one opening, and the space between the two fourth ends 1222 can be regarded as another opening.

[0074] In some possible implementations, such as Figure 6 As shown, the first portion 1210 is parallel to the first direction, and the second portion 1220 is parallel to the second direction. With this arrangement, the structure of the scatterer 120 is more neat and unnecessary clutter is not easily generated.

[0075] In some embodiments, Figure 7 As shown, each scatterer 120 further includes a third portion 1230 and a fourth portion 1240. One end of the third portion 1230 is connected to the third end 1221, and the other end extends toward the direction close to the other scatterer 120. One end of the fourth portion 1240 is connected to the fourth end 1222, and the other end extends toward the direction close to the other scatterer 120. Among them, in the two scatterers 120, an opening of a resonant structure is defined between two third portions 1230 opposite to each other along the first direction (for example, at Figure 7 In the embodiment, the free ends of the two third parts 1230 are opposite to each other and form the opening, the free end refers to the opposite end of the fixed end, and the fixed end is one end of the third end 1221 connected to the second part 1220), and another opening of the resonant structure is defined between the two fourth parts 11240 opposite to each other along the first direction (for example, at Figure 7 In the embodiment, the free ends of the two fourth parts are opposite to each other and form the opening, and the free end refers to the opposite end of the fixed end, and the fixed end is one end connected to the fourth end of the second part 1220). Thus, a resonant structure with two openings placed in opposite directions can still be formed, and a good decoupling effect can be achieved.

[0076] In some embodiments, the two scatterers 120 are symmetrically arranged along the second direction, so that the structures of the two scatterers 120 are more neat and symmetrical, and unnecessary clutter is not easily generated, thereby achieving a good decoupling effect.

[0077] In some embodiments, the two scatterers 120 are symmetrically arranged along the first direction, so that the structures of the two scatterers 120 are more neat and symmetrical, and unnecessary clutter is not easily generated, thereby achieving a good decoupling effect.

[0078] A specific example of an antenna decoupling structure is provided below.

[0079] Antenna decoupling structure example 1: Based on Figure 7 In the embodiment shown, further, the dielectric plate 110 adopts FR4, with a dielectric constant of 4.4 and a thickness of 1 mm. The height from the ground (i.e., the distance from the dielectric plate 110 to the floor 230 along the direction perpendicular to the first surface a1) is 25 mm, i.e., 0.15 times the wavelength. Two "E" type parasitic scatterers 302 are printed on the first surface of the dielectric plate 110. The length L1 of the second part 1220 of the "E" type scatterer is 37.05 mm, the width L2 is 0.7 mm, the length L3 of the third part 1230 and the length L4 of the fourth part 1240 are both 5.5 mm. The load 130 includes at least a capacitor 1301.

[0080] The above respectively introduces the arrangement of antennas in the antenna array and some embodiments of the antenna decoupling structure. The following explains the arrangement of the antenna decoupling structure in the antenna array.

[0081] Fig.12 This is a structural diagram of another antenna array provided in an embodiment of the present application. Fig.12 As shown, the antenna decoupling structure 100 can be arranged between the transmitting antenna 210 and the receiving antenna 220, and the antenna decoupling structure 100 can be arranged at a certain height h from the floor (for example, half of the maximum height H of the antenna, illustratively, H can be 40 mm and h can be 25 mm). At this time, the scatterer 120 can be located on the side of the dielectric plate 110 close to the floor 230, or on the side of the dielectric plate 110 away from the floor 230. Such an arrangement can achieve a good decoupling effect. It is worth mentioning that the inventor of the present application has found that the coupling of the two antennas is mainly derived from the vertically polarized electric field between the two antennas, and the coupling path can be divided into Fig.11Path 1 above the antenna decoupling structure 100 and path 2 below the antenna decoupling structure 100. In the embodiment of the present application, the antenna decoupling structure 100 is disposed between the transmitting antenna 210 and the receiving antenna 220, and the antenna decoupling structure 100 is disposed at a certain height (e.g., 25 mm) from the floor. According to simulation experiments, the coupling of path 2 can be mainly improved, which can also be understood as changing the amplitude and phase of the electromagnetic wave of path 2, while the improvement effect on path 1 is smaller than that on path 2, so that the coupling of path 2 and path 1 can cancel each other when reaching the receiving antenna 220, thereby achieving a good decoupling effect.

[0082] Hereinafter, the antenna decoupling structure 100 is set at a certain height from the floor as an example for explanation. In this way, different responses to the vertically polarized field can be generated by adjusting the electrical parameters of the load 130 in the antenna decoupling structure 100, such as the capacitance value of the capacitor, so as to achieve a decoupling effect.

[0083] Return to Reference Figure 2 and Figure 3 In an antenna array provided in an embodiment of the present application, a first antenna decoupling structure 101 may be included (a second antenna decoupling structure 102 is not included in this case). For ease of explanation, the area directly opposite the transceiver antennas (i.e., the area where the first antenna decoupling structure is located in the figure) may be referred to as the first area, and the areas on both sides of the first area along the third direction (i.e., the area where the second antenna decoupling structure is located in the figure) may be referred to as the second area. The figure is an illustration of an example where the first antenna decoupling structure 101 is located in the first area. It can be understood that the first antenna decoupling structure 101 may also be provided in the second area, which may also have a certain degree of decoupling effect. In addition, in Figure 2 and Figure 3 In the embodiment, due to the viewing angle, it may appear that both the first antenna decoupling structure 101 and the second antenna decoupling structure 102 are in contact with the floor 230, but in fact, there is a certain distance between the first antenna decoupling structure 101 and the second antenna decoupling structure 102 and the floor 230, such as the height h mentioned above.

[0084] Exemplarily, the first antenna decoupling structure 101 is located in the first area. In the first antenna decoupling structure 101: the dielectric plate 110 is parallel to the floor 230, and the two scatterers 120 are arranged relatively along a third direction, and the third direction is parallel to the floor 230 and intersects with the line between the transmitting antenna 210 and the receiving antenna 220. With such an arrangement, the co-polarization isolation between the transmitting antenna 210 and the receiving antenna 220 (such as the signal isolation between the first pole plate 2001 of the transmitting and receiving antennas and the signal isolation between the second pole plate 2002 of the transmitting and receiving antennas) is more significantly improved, thereby achieving a better decoupling effect.

[0085] Exemplarily, the first antenna decoupling structure 101 is located in the middle of the area between the transmitting antenna 210 and the receiving antenna 220 (i.e., the middle of the first area along the third direction). This arrangement can better prevent the signals between the transmitting antenna 210 and the receiving antenna 220 from interfering with each other, and can achieve a better decoupling effect.

[0086] In some other examples, the antenna array 200 further includes a second antenna decoupling structure 102. The second antenna decoupling structure 102 is disposed on at least one side of the first antenna decoupling structure 101 along the third direction. Figure 2 As shown, a second antenna decoupling structure 102 may be provided on both sides of the first antenna decoupling structure 101 along the third direction. The structure and arrangement of the second antenna decoupling structure 102 may be the same as or different from the structure and arrangement of the first antenna decoupling structure 101. The second antenna decoupling structure 102 may play a good auxiliary role and further improve the mutual coupling problem between the transmitting antenna 210 and the receiving antenna 220.

[0087] Exemplarily, in the second antenna decoupling structure 102: the dielectric plate 110 is parallel to the floor 230, and the two scatterers 120 are arranged relatively along the third direction. The second antenna decoupling structure 102 is located in the second area. In this way, the polarization isolation between the transmitting antenna 210 and the receiving antenna 220 (such as the signal isolation between the first pole plate 2001 of the transmitting antenna 210 and the second pole plate 2002 of the receiving antenna 220, and the signal isolation between the second pole plate 2002 of the transmitting antenna 210 and the first pole plate 2001 of the receiving antenna 220) is improved more significantly, thereby achieving a better decoupling effect.

[0088] In some embodiments, refer back to Figure 3 , the number of transmitting antennas 210 is multiple, and the number of receiving antennas 220 is multiple. Multiple transmitting antennas 210 are arranged in sequence along the third direction, and multiple receiving antennas 220 are arranged in sequence along the third direction. Among them, one transmitting antenna 210 and one receiving antenna 220 are opposite to each other along the third direction to form an antenna unit 300. Two adjacent antenna units 300 share a second antenna decoupling structure 102. Such a setting can, on the one hand, achieve a good decoupling effect, and on the other hand, is conducive to simplifying the structure and shortening the arrangement distance between the antenna units 300 and the antenna units 300.

[0089] In addition, the inventors of this application have found that in actual application scenarios, the electromagnetic environments of antennas at different positions in the array are different, so the same decoupling structure is not the optimal solution for array antenna decoupling. Figure 2 and Figure 3Taking the embodiment as an example, the electrical parameter of the load of the first antenna decoupling structure can be set to the first parameter, and the electrical parameter of the load of the second antenna decoupling structure can be set to the second parameter, which is conducive to achieving a better decoupling effect.

[0090] For example, when the aforementioned "antenna decoupling structure example one" is applied as the first antenna decoupling structure 101 and the second antenna decoupling structure 102 to the aforementioned antenna array example one, the load 130 of the first antenna decoupling structure 101 can be set to include a first capacitor, the capacitance value of the second capacitor is 17.4pF, and the load 130 of the second antenna decoupling structure 102 can be set to include a second capacitor, and the capacitance value of the second capacitor is 14.1pF. With such a setting, after simulation tests, it was found that: 1. Between the operating frequency band of 1.7-1.9 GHz, the standing wave ratio of each antenna port in the antenna array 200 with the antenna decoupling structure 100 added and the antenna array without the antenna decoupling structure 100 was less than 2, that is, after adding the antenna decoupling structure 100, the standing wave ratio of the antenna port was not deteriorated; 2. Between the operating frequency band of 1.7-1.9 GHz, in the antenna array 200 without the antenna decoupling structure 100, the isolation degree of the co-polarization port between the transmitting antenna 210 and the receiving antenna 220 was at most 26 dB, while in the antenna array with the antenna decoupling structure, the isolation degree of the co-polarization port between the transmitting antenna 210 and the receiving antenna 220 was at most 26 dB. The isolation between the co-polarized ports of the transmitting antenna 210 and the receiving antenna 220 can reach up to 33dB, which is a significant improvement; 3. Between the 1.7-1.9GHz operating frequency band, in the antenna array 200 without the antenna decoupling structure 100, the isolation between the heteropolarized ports of the transmitting antenna 210 and the receiving antenna 220 does not exceed 33dB, while in the antenna array 200 with the antenna decoupling structure 100, the isolation between the heteropolarized ports of the transmitting antenna 210 and the receiving antenna 220 can reach up to 37dB, which is also a significant improvement; 4. After adding the antenna decoupling structure, the radiation pattern is not distorted when a single channel is excited.

[0091] In some other examples, refer back to Figure 4 , the antenna array 200 further includes a third antenna decoupling structure 103. For example, the third antenna decoupling structure 103 may be provided on both sides of the transmitting antenna 210 along the fourth direction, and the third antenna decoupling structure 103 may also play a certain auxiliary role, further improving the mutual coupling problem between the transmitting antenna 210 and the receiving antenna 220. Figure 4 In the embodiment, due to the viewing angle, it may appear that both the first antenna decoupling structure 101 and the second antenna decoupling structure 102 are in contact with the floor 230, but in fact, there is a certain distance between the first antenna decoupling structure 101 and the second antenna decoupling structure 102 and the floor 230, such as the height h mentioned above.

[0092] For example, in the third antenna decoupling structure 103, the dielectric plate 110 may be perpendicular to the floor 230, and the two scatterers may be arranged opposite to each other along the third direction, so as to achieve a better auxiliary decoupling effect.

[0093] Exemplarily, when multiple transmitting antennas 210 are included, adjacent transmitting antennas 210 can share a third antenna decoupling structure 103. Such a configuration can, on the one hand, achieve a good decoupling effect, and on the other hand, help simplify the structure and shorten the arrangement distance between transmitting antennas 210.

[0094] For some more examples, see Figure 4 The antenna array 200 further includes a fourth antenna decoupling structure 104. For example, the fourth antenna decoupling structure 104 may be provided on both sides of the receiving antenna 220 along the fourth direction, and the fourth antenna decoupling structure 104 may also play a certain auxiliary role, further improving the mutual coupling problem between the transmitting antenna 210 and the receiving antenna 220.

[0095] For example, in the fourth antenna decoupling structure 104, the dielectric plate 110 may be perpendicular to the floor 230, and the two scatterers may be arranged opposite to each other along the third direction, so as to achieve a better auxiliary decoupling effect.

[0096] Exemplarily, when multiple receiving antennas 220 are included, adjacent receiving antennas 220 can share a fourth antenna decoupling structure 104. Such a configuration can, on the one hand, achieve a good decoupling effect, and on the other hand, help simplify the structure and shorten the arrangement distance between receiving antennas 220.

[0097] Similarly, while setting the electrical parameters of the load of the first antenna decoupling structure to the first parameters and the electrical parameters of the load of the second antenna decoupling structure to the second parameters, the electrical parameters of the load of the third antenna decoupling structure can be set to the third parameters and the electrical parameters of the load of the fourth antenna decoupling structure can be set to the fourth parameters. This is conducive to achieving a better decoupling effect.

[0098] For example, when the aforementioned “antenna decoupling structure example 1” is used as the first antenna decoupling structure 101, the second antenna decoupling structure 102, the third antenna decoupling structure 103, and the fourth antenna decoupling structure 104 in the aforementioned “antenna arrangement example 2”, for the sake of convenience, Figure 4All antenna decoupling structures are numbered ak in sequence, wherein the load of each antenna decoupling structure 100 includes a capacitor, and the capacitance values ​​of ak are 10pF, 18pF, 6.4pF, 21.8pF, 9.6pF, 30.7pF, 10.9pF, 71.6pF, 14.3pF, 11.5pF, and 11.3pF in sequence. With such a setting, after simulation tests, it was found that: 1. Between the operating frequency bands of 1.7-1.9 GHz, the standing wave ratio of each antenna port in the antenna array 200 with the antenna decoupling structure 100 and the antenna array without the antenna decoupling structure 100 is less than 2, and the standing wave ratio of each antenna port in the antenna array 20 with the antenna decoupling structure 100 is smaller, that is, closer to 1, with better effect, and the antenna port standing wave ratio is improved; 2. Between the operating frequency bands of 1.7-1.9 GHz, in the antenna array 200 without the antenna decoupling structure 100, the isolation degree of the co-polarized ports of the transmitting antenna 210 and the receiving antenna 220 is at most 25 dB, while that with the antenna decoupling structure In the antenna array with the antenna decoupling structure, the isolation between the co-polarized ports of the transmitting antenna 210 and the receiving antenna 220 can reach up to 40dB, which is a significant improvement; 3. Between the 1.7-1.9GHz operating frequency band, in the antenna array 200 without the antenna decoupling structure 100, the isolation between the heteropolarized ports of the transmitting antenna 210 and the receiving antenna 220 does not exceed 33dB, while in the antenna array 200 with the antenna decoupling structure 100, the isolation between the heteropolarized ports of the transmitting antenna 210 and the receiving antenna 220 can reach up to 35dB, which is also a significant improvement; 4. After adding the antenna decoupling structure 100, the radiation pattern is not distorted when a single channel is excited.

[0099] In summary, the embodiment of the present application provides an antenna decoupling structure 100, an antenna array 200 and a communication device 1000. The antenna decoupling structure 100 provided in the embodiment of the present application can be applied to the antenna array 200, and the antenna array 200 can be further applied to the communication device 1000. In this way, the amount of energy obtained by the antenna decoupling structure 100 from the antenna can be adjusted by changing the relative relationship between the resonant frequency of the antenna decoupling structure 100 and the resonant frequency of the antenna. For example, when the initial coupling of the antenna is relatively strong, the resonant frequency of the antenna decoupling structure 100 can be adjusted to be closer to the resonant frequency of the antenna (that is, the difference between the two is small), so that the antenna decoupling structure 100 can obtain more energy from the antenna to offset the strong initial coupling between the transceiver antennas; and when the initial coupling of the antenna is relatively weak, the resonant frequency of the antenna decoupling structure 100 can be adjusted to be more deviated from the resonant frequency of the antenna (that is, the difference between the two is large), so that the antenna decoupling structure 100 can obtain less energy from the antenna to offset the weak initial coupling between the transceiver antennas. That is, it is equivalent to introducing equivalent coupling between the transmitting and receiving antennas to offset the spatial coupling between the transmitting and receiving antennas, thereby achieving the purpose of decoupling (or decoupling).

[0100] The first antenna decoupling structure 101, the second antenna decoupling structure 102, the third antenna decoupling structure 103, and the fourth antenna decoupling structure 104 can be further fine-tuned while being adjusted to be close to or away from the antenna resonant frequency, thereby achieving a better decoupling effect. Exemplarily, the amplitude of fine-tuning can be that the frequency modulation range when close to the antenna resonant frequency does not exceed ±10% of the antenna resonant frequency, and the frequency modulation range when away from the antenna resonant frequency exceeds ±50% of the antenna resonant frequency. Among them, not exceeding ±10% of the antenna resonant frequency includes the case where it is equal to +10% or -10% of the antenna resonant frequency, and exceeding ±50% of the antenna resonant frequency does not include the case where it is equal to +50% or -50% of the antenna resonant frequency.

[0101] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An antenna decoupling structure, characterized in that: It includes a dielectric plate, two scatterers and a load; The two scatterers are arranged on the first surface of the dielectric plate and are arranged opposite to each other along a first direction, and the first direction is parallel to the first surface; The load is electrically connected between the two scatterers. The load and the two scatterers form a resonant structure with an opening, and the opening is located between the two scatterers.

2. The antenna decoupling structure according to claim 1, characterized in that: The load includes a capacitor.

3. The antenna decoupling structure according to claim 2, characterized in that: The capacitor is an adjustable capacitor.

4. The antenna decoupling structure according to any one of claims 1 to 3, characterized in that: The load includes a resistor.

5. The antenna decoupling structure according to claim 4, characterized in that: The resistor is an adjustable resistor.

6. The antenna decoupling structure according to any one of claims 1 to 5, characterized in that: The number of the resonant structures is two, and the openings of the two resonant structures are arranged in opposite directions along a second direction; the second direction is parallel to the first surface and crosses the first direction.

7. The antenna decoupling structure according to any one of claims 1 to 6, characterized in that: The two scatterers are symmetrically arranged along a second direction, and the second direction is parallel to the first surface and crosses the first direction.

8. The antenna decoupling structure according to any one of claims 1 to 7, characterized in that: The two scatterers are symmetrically arranged along the first direction.

9. The antenna decoupling structure according to any one of claims 1 to 8, characterized in that: Each of the scatterers comprises a first portion and a second portion; The first part includes a first end and a second end, the first end is closer to another scatterer than the second end; the first end is connected to the load, and the second end is connected to the target part of the second part; The second portion includes opposing third and fourth ends, and the target site is located between the third and fourth ends.

10. The antenna decoupling structure according to claim 9, characterized in that: The first portion is parallel to the first direction, the second portion is parallel to a second direction, and the second direction is parallel to the first surface and intersects the first direction.

11. The antenna decoupling structure according to claim 9 or 10, characterized in that: Each of the scatterers further comprises a third part and a fourth part; one end of the third part is connected to the third end, and the other end extends toward the direction close to another of the scatterers; one end of the fourth part is connected to the fourth end, and the other end extends toward the direction close to another of the scatterers; Among the two scatterers, an opening of the resonant structure is defined between two third portions opposite to each other along the first direction, and another opening of the resonant structure is defined between two fourth portions opposite to each other along the first direction.

12. An antenna array, characterized in that: include: A floor, a transmitting antenna, a receiving antenna and a first antenna decoupling structure; The transmitting antenna and the receiving antenna are arranged on the floor, the first antenna decoupling structure is located between the transmitting antenna and the receiving antenna, and the first antenna decoupling structure is the antenna decoupling structure according to any one of claims 1-11.

13. The antenna array according to claim 12, characterized in that: In the first antenna decoupling structure: the dielectric plate is parallel to the floor, the two scatterers are arranged relatively along a third direction, and the third direction is parallel to the floor and intersects with the connection line between the transmitting antenna and the receiving antenna.

14. The antenna array according to claim 12 or 13, characterized in that: The first antenna decoupling structure is located in the middle of a region between the transmitting antenna and the receiving antenna.

15. The antenna array according to any one of claims 12 to 14, characterized in that: It also includes a second antenna decoupling structure, wherein the second antenna decoupling structure is the antenna decoupling structure according to any one of claims 1 to 11; The second antenna decoupling structure is disposed on at least one side of the first antenna decoupling structure along a third direction, and the third direction is parallel to the floor and intersects a line connecting the transmitting antenna and the receiving antenna.

16. The antenna array according to claim 15, characterized in that: The number of the transmitting antennas is multiple, and the number of the receiving antennas is multiple; The plurality of transmitting antennas are sequentially arranged at intervals along the third direction, and the plurality of receiving antennas are arranged at intervals along the third direction; wherein one transmitting antenna and one receiving antenna are opposite to each other along the third direction to form an antenna unit; Two adjacent antenna units share one second antenna decoupling structure.

17. The antenna array according to claim 15 or 16, characterized in that: In the second antenna decoupling structure: the dielectric plate is parallel to the floor, and the two scatterers are arranged opposite to each other along the third direction.

18. The antenna array according to any one of claims 12 to 14, characterized in that: Also includes: A third antenna decoupling structure, wherein the third antenna decoupling structure is the antenna decoupling structure according to any one of claims 1 to 11; The third antenna decoupling structure is provided on at least one side of the transmitting antenna along a third direction, and the third direction is parallel to the floor and intersects with a line connecting the transmitting antenna and the receiving antenna; and / or, A fourth antenna decoupling structure, wherein the fourth antenna decoupling structure is the antenna decoupling structure as described in any one of claims 1 to 11; the fourth antenna decoupling structure is arranged on at least one side of the receiving antenna along a third direction, and the third direction is parallel to the floor and intersects with the line between the transmitting antenna and the receiving antenna.

19. The antenna array according to claim 18, characterized in that: When the antenna array includes a third antenna decoupling structure and the number of the transmitting antennas is multiple, two adjacent transmitting antennas share one third antenna decoupling structure; and / or, When the antenna array includes a fourth antenna decoupling structure and the number of the receiving antennas is plural, two adjacent receiving antennas share one third antenna decoupling structure.

20. The antenna array according to claim 18, characterized in that: When the antenna array includes a third antenna decoupling structure, in the third antenna decoupling structure, the dielectric plate is perpendicular to the floor, the two scatterers are arranged opposite to each other along a fourth direction, and the fourth direction is parallel to a line between the transmitting antenna and the receiving antenna; and / or, When the antenna array includes a fourth antenna decoupling structure, in the fourth antenna decoupling structure, the dielectric plate is perpendicular to the floor, the two scatterers are arranged relatively along a fourth direction, and the fourth direction is parallel to the line between the transmitting antenna and the receiving antenna.

21. The antenna array according to any one of claims 12 to 20, characterized in that: The transmitting antenna and the receiving antenna are both dual-polarized antennas.

22. A communication device, characterized in that: include: An antenna array as claimed in any one of claims 12 to 21.

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