Array antenna and wireless terminal

Abstract

The utility model provides an array antenna and a wireless terminal.The array antenna comprises a substrate, a plurality of antenna array elements, a first feed network and a second feed network, and the substrate comprises a first surface and a second surface which are opposite to each other; the plurality of antenna array elements are distributed on one or both of the first surface and the second surface at intervals along the extension direction of the first surface; the first feed network is arranged on the first surface and is connected with the plurality of antenna array elements, the second feed network is arranged on the second surface and is connected with the plurality of antenna array elements, at least one of the first feed network and the second feed network is connected with a feed source, and at least part of the first feed network and at least part of the second feed network are coupled and connected. The array antenna provided by the utility model has the advantages of simple processing technology and low processing cost.

Description

Technical Field

[0001] The present application belongs to the technical field of communication equipment, and more specifically, to an array antenna and a wireless terminal. Background Art

[0002] An array antenna is an antenna system composed of multiple array elements arranged in a certain pattern. Compared with a traditional single antenna, an array antenna has higher gain and narrower beam width, and can better focus in a specific direction, thereby improving gain and directivity.

[0003] However, the array antenna in the related art needs to open metal holes on the substrate, which has the problems of complex processing technology and high processing cost. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an array antenna to solve the technical problems in the prior art that metal holes need to be opened on a substrate, resulting in complex processing technology and high processing costs.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an array antenna, including a substrate and a plurality of antenna array elements, the substrate including a first surface and a second surface opposite to each other, and the plurality of antenna array elements are distributed on one or both of the first surface and the second surface at intervals along the extension direction of the first surface; a first feeding network and a second feeding network, the first feeding network is arranged on the first surface and connected to the plurality of antenna array elements, the second feeding network is arranged on the second surface and connected to the plurality of antenna array elements, and at least one of the first feeding network and the second feeding network is connected to a feed source, and at least a portion of the first feeding network and at least a portion of the second feeding network are coupled and connected.

[0006] The beneficial effect of the array antenna provided by the present application is that, compared with the solution in the prior art in which the feed networks on both sides of the substrate need to be connected through metal holes that pass through the substrate, the first feed network and the second feed network of the array antenna of the present application are connected by coupling, which, on the one hand, simplifies the processing technology and reduces the manufacturing cost of the antenna, and on the other hand, avoids the impedance mismatch between the antenna array element and the feed network caused by welding between the first feed network and the second feed network, thereby improving the communication efficiency of the array antenna provided by the present application.

[0007] Optionally, the first feeding network and the second feeding network have the same shape and are arranged orthogonally.

[0008] Optionally, the first feeding network and the second feeding network both include a first network and a second network, the first network is connected to the feed source and to a part of the array elements, the second network is connected to another part of the array elements, and a part of the second network is coupled to a part of the first network.

[0009] Optionally, the first net includes first wires, the second net includes second wires, and the first wires are parallel to and spaced from the second wires to form a parallel double-wire structure.

[0010] Optionally, there are a plurality of the second nets, the first net is sandwiched between two of the second nets, the first net includes a plurality of first lines, the plurality of first lines are arranged in parallel and at intervals, and the plurality of first lines are arranged in one-to-one correspondence with the plurality of second nets.

[0011] Optionally, the first network further includes a third line and a fourth line, there are two first lines, one end of the third line is connected to one of the two first lines, the other end of the third line is connected to the other of the two first lines, and the fourth line is arranged between the first lines and intersects with the third line;

[0012] A gap is provided at the intersection of the third line and the fourth line, and the gap cuts off the third line and the fourth line.

[0013] Optionally, the third line of one of the first feeding network and the second feeding network is arranged in parallel with the fourth line of the other of the first feeding network and the second feeding network along the spacing direction of the first surface and the second surface to form a parallel double-line structure.

[0014] Optionally, an end of the fourth line of the first feeding network is coupled and connected to the second line of the second feeding network, and an end of the fourth line of the second feeding network is coupled and connected to the second line of the first feeding network.

[0015] Optionally, a coupling branch is provided at the end of the fourth line, and the coupling branch of the first feeding network is arranged in parallel with a portion of the second line of the second feeding network along the spacing direction between the first surface and the second surface, and the coupling branch of the second feeding network is arranged in parallel with a portion of the second line of the first feeding network along the spacing direction between the first surface and the second surface.

[0016] Optionally, the first line is provided with a first wide segment, the second line is provided with a second wide segment, the width dimension of the first wide segment is the same as the width dimension of the second wide segment and is arranged correspondingly, the third line is connected to the first wide segment, and the width dimension of the coupling branch is smaller than the width dimension of the second wide segment, so that the coupling branch is located between the two ends in the width direction of the second wide segment to which it is coupled.

[0017] An embodiment of the present application further provides a wireless terminal, which includes the array antenna described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of the structure of an array antenna provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a first network and a second network of an array antenna provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of a first feeding network and a second feeding network of an array antenna provided in an embodiment of the present application;

[0022] Figure 4 for Figure 1 A local enlarged schematic diagram of the middle A;

[0023] Figure 5 for Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0024] Figure 6 A schematic diagram of the structure of an array antenna provided in another embodiment of the present application;

[0025] Figure 7 A schematic diagram of feeding through a gap of an array antenna provided in an embodiment of the present application;

[0026] Figure 8 A beam pattern of a first feeding network of an array antenna provided in an embodiment of the present application feeding multiple antenna elements;

[0027] Fig. 9 A beam pattern of a second feeding network of an array antenna provided in an embodiment of the present application feeding multiple antenna array elements;

[0028] Fig.10 A schematic diagram of S parameters of an array antenna exciting a plurality of patches respectively through a first feeding network and a second feeding network is provided for an embodiment of the present application.

[0029] Among them, the reference numerals in the figure are:

[0030] 100. Array antenna;

[0031] 10. substrate; 11. first surface; 12. second surface;

[0032] 20. Antenna array element;

[0033] 30. Back panel;

[0034] 401, first feeding network; 402, second feeding network; 41, first network; 411, first line; 4111, first wide segment; 412, third line; 413, fourth line; 4131, coupling branch; 414, gap; 42, second network; 421, second line; 4211, second wide segment; 43, feeding branch. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] Please also read Figure 1 and Figure 3 Now, the array antenna 100 provided in the embodiment of the present application is described. The array antenna 100 includes a substrate 10, a plurality of antenna elements 20, at least one first feed network 401 and at least one second feed network 402.

[0039] The substrate 10 includes a first surface 11 and a second surface 12 opposite to each other. A plurality of antenna elements 20 are distributed on one or both of the first surface 11 and the second surface 12 at intervals along an extending direction of the first surface 11 .

[0040] Specifically, the substrate 10 may be an insulating material with a low dielectric constant. The substrate 10 may be a thin-walled structure such as a flat plate or an arc. The first surface 11 is located on one side of the substrate 10 in the thickness direction, and the second surface 12 is located on the other side of the substrate 10 in the thickness direction. The first surface 11 and the second surface 12 are parallel and extend along the Figure 1 The z direction is spaced apart, such as Figure 1 As shown, in some embodiments, the substrate 10 is a flat plate structure, and the first surface 11 and the second surface 12 are parallel to each other.

[0041] A single antenna array element 20 includes one or more patches, which can generate electromagnetic oscillations under the feeding excitation of the oscillation circuit to transmit electromagnetic signals. Figure 1 The antenna elements 20 are arranged in an interval manner in the x-direction and the y-direction. The plurality of antenna elements 20 may be located on one of the first surface 11 and the second surface 12 . The plurality of antenna elements 20 may also be alternately distributed on the first surface 11 and the second surface 12 .

[0042] The first feed network 401 is disposed on the first surface 11 and connected to the plurality of antenna array elements 20, the second feed network 402 is disposed on the second surface 12 and connected to the plurality of antenna array elements 20, and at least one of the first feed network 401 and the second feed network 402 is connected to a feed source, and at least a portion of the first feed network 401 and at least a portion of the second feed network 402 are coupled and connected.

[0043] Specifically, the antenna array element 20 is arranged on the first surface 11, and the first feeding network 401 includes multiple ports. The multiple ports of the first feeding network 401 are connected to the multiple antenna array elements 20 one by one. The ports of the first feeding network 401 can be directly connected to the edges of the antenna array elements 20 for feeding, or the ports of the first feeding network 401 can be coupled and connected to the edges of the antenna array elements 20 for feeding.

[0044] The second feeding network 402 is disposed on the second surface 12 . The second feeding network 402 has a plurality of ports. The plurality of ports of the second feeding network 402 are connected to the plurality of antenna array elements 20 in a one-to-one correspondence.

[0045] The substrate 10 can be sandwiched between part of the first feeding network 401 and part of the second feeding network 402. When the first feeding network 401 and the second feeding network 402 are both connected to the feed source, the electrical signal in the first feeding network 401 and the electrical signal in the second feeding network 402 can be transmitted to each other through coupling, thereby facilitating the adjustment of the input impedance and improving the matching effect between the feeding network and the antenna array element 20.

[0046] It should be noted that the first feed network 401 and the second feed network 402 can be connected to the same feed source so that the array antenna 100 of the embodiment of the present application has a high gain effect. The first feed network 401 and the second feed network 402 can also be connected to different feed sources respectively so that the array antenna 100 of the embodiment of the present application has a dual antenna working mode.

[0047] Compared with the solution in the prior art in which the feed networks on both sides of the substrate 10 need to be connected through metal holes that penetrate the substrate 10, the array antenna 100 provided in the present application has a first feed network 401 and a second feed network 402 connected by coupling. On the one hand, it simplifies the processing technology and reduces the manufacturing cost of the antenna. On the other hand, it avoids the impedance mismatch between the antenna element 20 and the feed network caused by welding between the first feed network 401 and the second feed network 402, thereby improving the communication efficiency of the array antenna 100 provided in the present application.

[0048] In some embodiments of the present application, Figure 1-Figure 3 As shown, the number of antenna array elements 20 is sixteen, and the antenna array elements 20 are divided into Figure 1 Four rows evenly spaced in the x direction and along Figure 1 The four columns are evenly spaced in the y direction, and a sixteen-element array is realized without the need for metallized via process, such as Figure 8 and Fig. 9 As shown, the maximum gain value of the first feeding network 401 feeding the multiple antenna array elements 20 and the maximum gain value of the second feeding network 402 feeding the multiple antenna array elements 20 both exceed 19 dBi.

[0049] In some embodiments, the multiple patches of the antenna array element 20 include a first layer and a second layer, a portion of the patches are located on the first surface 11 to form a first layer, and the first layer is connected to the first feeding network 401, and another portion of the patches are located on the second surface 12 to form a second layer, and the second layer is connected to the second feeding network 402.

[0050] In some other embodiments, the number of patches in the first layer is the same as the number of patches in the second layer, and the arrangement of the multiple patches in the first layer is the same as the arrangement of the multiple patches in the second layer.

[0051] In some embodiments of the present application, Figure 1 As shown, the first and second layers of the antenna array element 20 are composed of four patches along Figure 1 The antenna array element 20 is arranged in the x-direction and the y-direction. A recess is provided at the edge of the antenna array element 20. The port of the first feeding network 401 extends into the recess to couple and feed the antenna array element 20. The port of the second feeding network 402 extends into the recess to couple and feed the antenna array element 20.

[0052] In other embodiments of the present application, Figure 6 As shown, the first and second layers of the antenna array element 20 are composed of nine patches along Figure 4 The first feeding network 401 is arranged in the x-direction and the y-direction. A feeding branch 43 is provided at the port of the first feeding network 401. The feeding branch 43 extends along the side line of the antenna element 20 and forms a gap with the side line of the antenna element 20 to couple and feed the antenna element 20.

[0053] In some embodiments of the present application, the array antenna 100 further includes a reflective backplane 30 , which is parallel to the substrate 10 and arranged at intervals on a side of the substrate 10 facing the second surface 12 .

[0054] Therefore, the electromagnetic waves generated by the first feeding network 401 and the electromagnetic waves generated by the second feeding network 402 to excite the multiple antenna array elements 20 are reflected by the reflective backplane 30, so that the array antenna 100 of the embodiment of the present application radiates unidirectionally.

[0055] In another embodiment of the present application, please refer to Figure 3 The first feeding network 401 and the second feeding network 402 have the same shape and are arranged orthogonally.

[0056] Specifically, the first feeding network 401 and the second feeding network 402 are arranged orthogonally, that is, the first feeding network 401 is about Figure 3 The shape of the y direction is related to the second feeding network 402 Figure 3 The shape in the x direction is the same, where Figure 3 The x direction and Figure 3 Orthogonal to the y direction.

[0057] In some embodiments, multiple antenna array elements 20 are arranged along Figure 1-Figure 3 The x direction and Figure 1-Figure 3 The antenna elements 20 are evenly spaced in the y direction so that the antenna elements 20 are arranged along the Figure 1 The arrangement in the x direction and along Figure 1 The arrangement manner in the y direction is the same, so that the matching effect between the first feeding network 401 and the plurality of antenna array elements 20 is the same as the matching effect between the second feeding network 402 and the plurality of antenna array elements 20.

[0058] Therefore, the first feed network 401 and the second feed network 402 have the same shape, so that the beam shape generated by the first feed network 401 exciting the multiple antenna array elements 20 is the same as the beam shape generated by the second feed network 402 exciting the multiple antenna array elements 20. The first feed network 401 and the second feed network 402 are arranged orthogonally, so that the beam direction generated by the first feed network 401 exciting the multiple antenna array elements 20 is orthogonal to the beam direction generated by the second feed network 402 exciting the multiple antenna array elements 20, thereby improving the isolation of the array antenna 100 of the embodiment of the present application.

[0059] like Fig.10 As shown, the matching effect between the feeding network of the array antenna 100 of the embodiment of the present application and the antenna array element 20 is good, so that the return loss of the array antenna 100 of the embodiment of the present application when feeding multiple antenna array elements 20 through the first feeding network 401 and the return loss when feeding multiple antenna array elements 20 through the second feeding network 402 are both greater than 10dB.

[0060] The array antenna 100 of the embodiment of the present application generates a beam when feeding multiple antenna array elements 20 through the first feed network 401 and a beam generated when feeding multiple antenna array elements 20 through the second feed network 402, which is orthogonal to each other, so that the isolation between the beam generated when the array antenna 100 of the embodiment of the present application feeds multiple antenna array elements 20 through the first feed network 401 and the beam generated when feeding multiple antenna array elements 20 through the second feed network 402 is greater than 25dB.

[0061] It should be noted that, since the first feeding network 401 and the second feeding network 402 have the same shape, the limitation on the structure of one of the first feeding network 401 and the second feeding network 402 in the following text can be understood as being equivalent to the limitation on the structure of the other of the first feeding network 401 and the second feeding network 402.

[0062] In another embodiment of the present application, please refer to Figure 2 The first feeding network 401 and the second feeding network 402 both include a first network 41 and a second network 42. The first network 41 is connected to the feed source and to a part of the array elements, the second network 42 is connected to another part of the array elements, and part of the second network 42 is coupled and connected to part of the first network 41.

[0063] Specifically, the first feeding network 401 and the second feeding network 402 have the same shape, both the first feeding network 401 and the second feeding network 402 include a first network 41 and a second network 42, and the number of the first network 41 in the first feeding network 401 is the same as the number of the first network 41 in the second feeding network 402, the number of the second network 42 in the first feeding network 401 is the same as the number of the second network 42 in the second feeding network 402, and the arrangement of the first network 41 and the second network 42 in the first feeding network 401 is also the same as the arrangement of the first network 41 and the second network 42 in the second feeding network 402.

[0064] The first net 41 is directly connected to the feed source, and the electrical signal in the feed source is transmitted to a part of the antenna array elements 20 connected to the first net 41 through the first net 41. The second net 42 is coupled to the first net 41, and the electrical signal in the feed source is coupled and transmitted to the second net 42 through the first net 41, and stimulates multiple antenna array elements 20 connected to the second net 42 through the second net 42.

[0065] Therefore, among the multiple antenna array elements 20, some of the antenna array elements 20 are directly connected to the feed source through the first network 41 for direct feeding, and some of the antenna array elements 20 are coupled to the feed source through the first network 41 and the second network 42 for coupled feeding. On the one hand, some of the antenna array elements 20 have the advantages of good signal transmission integrity of direct feeding and avoidance of signal distortion. On the other hand, other part of the antenna array elements 20 have the advantages of convenient adjustment of input impedance and expansion of antenna bandwidth through coupled feeding, and have the advantage of strong anti-interference ability.

[0066] In another embodiment of the present application, see Figure 2 The first net 41 includes a first line 411, and the second net 42 includes a second line 421. The first line 411 and the second line 421 are arranged in parallel and at intervals to form a parallel double-line structure.

[0067] Specifically, the second network 42 of the first feed network 401 is located at Figure 2 One side or both sides of the middle direction, the first line 411 is along Figure 2 The second line 421 extends in the x direction. Figure 2 The first line 411 and the second line 421 extend in the x direction. Figure 2 The first wires 411 and the second wires 421 are arranged at intervals in the y direction so that the first wires 411 and the second wires 421 can be coupled.

[0068] A parallel double-line structure is formed between the first line 411 and the second line 421. A part of the antenna array elements 20 is connected to the first line 411, and the electrical signal is transmitted to multiple antenna array elements 20 along the first line 411. Another part of the antenna array elements 20 is connected to the second line 421, and the electrical signal is transmitted to multiple antenna array elements 20 along the second line 421.

[0069] As a result, the impedance of the electrical signal in the first feeding network 401 when extending along the first line 411 and the second line 421 is reduced, thereby improving the communication efficiency of the array antenna 100 of the embodiment of the present application.

[0070] In another embodiment of the present application, please refer to Figure 2 The second nets 42 are provided with a plurality of first nets 41 , and the first net 41 is sandwiched between two second nets 42 . The first net 41 includes a plurality of first lines 411 , and the plurality of first lines 411 are arranged in parallel and at intervals, and the plurality of first lines 411 are arranged one-to-one with the plurality of second nets 42 .

[0071] Specifically, in the first feeding network 401, the first network 41 of the first feeding network 401 is about Figure 2 The first feeding network 401 has two second networks 42, and the two second networks 42 of the first feeding network 401 are symmetrical along the x direction. Figure 2 The first network 41 of the first feeding network 401 is arranged along the y direction. Figure 2 On both sides of the y direction, the two second nets 42 of the first feeding net 401 are about Figure 2 Symmetrical in the x direction.

[0072] The first network 41 is connected to the two second networks 42 of the first feeding network 401 through two first lines 411. A first line 411 is located along the first network 41. Figure 2 At one end of the y direction, another first line 411 is located along the first web 41 Figure 2 The other end in the y direction is connected to two second nets 42 respectively.

[0073] In the second feeding network 402, the first network 41 of the second feeding network 402 is about Figure 2 The second feeding network 402 has two second nets 42, and the two second nets 42 of the second feeding network 402 are symmetrical along the y direction. Figure 2 The first network 41 of the second feeding network 402 is arranged along the x direction. Figure 2 On both sides of the x direction, the two second nets 42 of the second feeding net 402 are about Figure 2 Symmetrical in the y direction.

[0074] The first network 41 is connected to the two second networks 42 of the first feeding network 401 through two first lines 411. A first line 411 is located along the first network 41. Figure 2 At one end in the x direction, another first line 411 is located along the first web 41 Figure 2 The other end in the x direction is connected to two second nets 42 respectively.

[0075] Therefore, the shape of the first feeding network 401 is about Figure 2 The shape of the second feeding network 402 is symmetrical in the x direction. Figure 2 The beam shape generated by the first feeding network 401 exciting the multiple antenna array elements 20 is symmetrical in the y direction. Figure 2 The beam shape generated by the second feed network 402 exciting the multiple antenna array elements 20 is symmetrical in the x direction. Figure 2 The y-direction is symmetrical, which can improve the decoupling effect between the beams generated by the first feeding network 401 to excite the multiple antenna array elements 20 and the beams generated by the second feeding network 402 to excite the multiple antenna array elements 20, and can also increase the isolation of the array antenna 100 of the embodiment of the present application.

[0076] In another embodiment of the present application, please refer to Figure 2 The first net 41 also includes a third line 412 and a fourth line 413. There are two first lines 411. One end of the third line 412 is connected to one of the two first lines 411, and the other end of the third line 412 is connected to the other of the two first lines 411. The fourth line 413 is arranged between the multiple first lines 411 and intersects with the third line 412.

[0077] Specifically, the first net 41 includes two parallel and along Figure 2 Two first lines 411 are arranged in the y direction at intervals, and the third line 412 is arranged along Figure 2 The fourth line 413 is provided between the two first lines 411 and arranged in parallel with the first line 411. The middle section of the fourth line 413 is connected to the middle section of the third line 412, so that the combination structure of the third line 412 and the fourth line 413 is also about Figure 2 The x direction and Figure 2Symmetrical in the y direction.

[0078] Thus, the feed source and the first line 411 are connected via the third line 412 , and when the electrical signal in the feed source is transmitted to the third line 412 , the impedance of the electrical signal transmitted in the third line 412 can be adjusted by setting the fourth line 413 .

[0079] A gap is provided at the intersection of the third line 412 and the fourth line 413 , and the gap cuts off the third line 412 and the fourth line 413 .

[0080] Specifically, Figure 5 As shown, taking the first feeding network 401 as an example, the gap 414 is arranged between the third line 412 and the fourth line 413, and an angle is formed between an extension direction of the gap 414 and an extension direction of the third line 412, so that a portion of the third line 412 is located on one side of the gap 414 and another portion of the third line 412 is located on the other side of the gap 414, and a portion of the fourth line 413 is located on one side of the gap 414 and another portion of the fourth line 413 is located on the other side of the gap 414.

[0081] The third line 412 on one side of the gap 414 and the third line 412 on the other side of the gap 414 are related to each other. Figure 5 The fourth line 413 on one side of the gap 414 is symmetrical in the x direction, and the fourth line 413 on the other side of the gap 414 is symmetrical in the x direction. Figure 5 Symmetrical in the y direction.

[0082] Preferably, the angle between the extension direction of the gap 414 and the extension direction of the third line 412 is 45°.

[0083] It can be understood that the first feed network 401 is orthogonal to the second feed network 402, so that the gap 414 of the first feed network 401 is orthogonal to the gap 414 of the second feed network 402, so that the current direction in the first feed network 401 is orthogonal to the current direction in the second feed network 402, and then the current direction of the first feed network 401 to excite the multiple antenna array elements 20 is orthogonal to the current direction of the second feed network 402 to excite the multiple antenna array elements 20, so as to improve the isolation of the array antenna 100 of the embodiment of the present application.

[0084] Thus, the first network 41 is equally divided into two parts by the gap 414 , and the first feeding network 401 is fed by a feed source connected to both sides of the gap 414 .

[0085] like Figure 7 As shown in (a), in some embodiments of the present application, the feeder line is only provided in the gap 414 of the first feeding network 401 and is connected to both sides of the gap 414 of the first feeding network 401. The feeder line feeds the first feeding network 401, and the second feeding network 402 is fed through coupling with the first feeding network 401.

[0086] like Figure 7 As shown in (b), in other embodiments of the present application, the feeder line is only provided in the gap 414 of the second feeding network 402 and is connected to both sides of the gap 414 of the first feeding network 401. The feeder line feeds the second feeding network 402, and the first feeding network 401 is fed through coupling with the second feeding network 402.

[0087] like Figure 7 As shown in (c), in other embodiments of the present application, there are multiple feed lines, a part of the multiple feed lines are arranged in the gap 414 of the first feeding network 401 and connected to both sides of the gap 414 of the first feeding network 401, and another part of the multiple feed lines are arranged in the gap 414 of the second feeding network 402 and connected to both sides of the gap 414 of the second feeding network 402, and the two sides of the gap 414 of the first feeding network 401 and the two sides of the gap 414 of the second feeding network 402 are fed by the feed lines respectively.

[0088] In another embodiment of the present application, see Figure 5 The third line 412 of one of the first feeding network 401 and the second feeding network 402 is arranged in parallel with the fourth line 413 of the other of the first feeding network 401 and the second feeding network 402 along the spacing direction of the first surface 11 and the second surface 12 to form a parallel double-line structure.

[0089] Specifically, the third line 412 of the first feeding network 401 is along Figure 5 The fourth line 413 of the second feeding network 402 also extends in the y direction. Figure 5 The third line 412 of the first feeding network 401 and the fourth line 413 of the second feeding network 402 are parallel and extend in the y direction. Figure 5 The third wire 412 of the first feeding network 401 and the fourth wire 413 of the second feeding network 402 are arranged at intervals in the z direction, so that the third wire 412 of the first feeding network 401 and the fourth wire 413 of the second feeding network 402 form a parallel double-wire structure in different planes.

[0090] The third line 412 of the second feeding network 402 is along Figure 5 The fourth line 413 of the first feeding network 401 also extends in the x direction. Figure 5 The third line 412 of the second feeding network 402 and the fourth line 413 of the first feeding network 401 are parallel and extend in the y direction. Figure 5 The third wire 412 of the second feeding network 402 and the fourth wire 413 of the first feeding network 401 are arranged at intervals in the z direction, so that the third wire 412 of the second feeding network 402 and the fourth wire 413 of the first feeding network 401 form a parallel double-wire structure in different planes.

[0091] Therefore, the parallel two-wire structure can adjust the impedance of the electrical signal transmitted in the third wire 412 , so that the impedance of the first feeding network 401 and the impedance of the second feeding network 402 match the multiple antenna array elements 20 .

[0092] In another embodiment of the present application, please refer to Figure 2 and Figure 4 The end of the fourth line 413 of the first feeding network 401 is coupled and connected to the second line 421 of the second feeding network 402 , and the end of the fourth line 413 of the second feeding network 402 is coupled and connected to the second line 421 of the first feeding network 401 .

[0093] Specifically, the fourth line 413 of the first feeding network 401 extends away from the end of the third line 412 of the first feeding network 401 to the side of the second line 421 of the second feeding network 402 toward the substrate 10, and the fourth line 413 of the second feeding network 402 extends away from the end of the third line 412 of the second feeding network 402 to the side of the second line 421 of the first feeding network 401 toward the substrate 10.

[0094] Thus, the end of the fourth line 413 of the first feeding network 401 can be coupled and connected to the second line 421 of the second feeding network 402, and the end of the fourth line 413 of the second feeding network 402 can be coupled and connected to the second line 421 of the first feeding network 401. On the one hand, the first feeding network 401 and the second feeding network 402 can be coupled and connected, so as to facilitate the adjustment of the input impedance and improve the matching effect between the feeding network and the antenna array element 20. On the other hand, the second line 421 of the second feeding network 402 is coupled not only to the first line 411 of the second feeding network 402, but also to the fourth line 413 of the first feeding network 401, which is beneficial to reduce signal distortion and improve the communication efficiency of the array antenna 100 of the embodiment of the present application.

[0095] In another embodiment of the present application, please refer to Figure 4 A coupling branch 4131 is provided at the end of the fourth line 413, and the coupling branch 4131 of the first feeding network 401 and a part of the second line 421 of the second feeding network 402 are arranged in parallel along the spacing direction between the first surface 11 and the second surface 12, and the coupling branch 4131 of the second feeding network 402 and a part of the second line 421 of the first feeding network 401 are arranged in parallel along the spacing direction between the first surface 11 and the second surface 12.

[0096] Specifically, the fourth line 413 of the first feeding network 401 is along Figure 4 The coupling branch 4131 of the first feeding network 401 extends in the x direction. Figure 4 The second line 421 of the second feeding network 402 extends in the y direction. Figure 4 The coupling branch 4131 of the first feeding network 401 is parallel to the second line 421 of the second feeding network 402 and extends in the y direction. Figure 4 The two electrodes are arranged at intervals on both sides of the substrate 10 in the z direction.

[0097] The fourth line 413 of the second feeding network 402 is along Figure 2 The coupling branch 4131 of the second feeding network 402 extends in the y direction. Figure 2 The second line 421 of the first feeding network 401 extends in the x direction. Figure 2 The coupling branch 4131 of the second feeding network 402 is parallel to the second line 421 of the first feeding network 401 and extends in the x direction. Figure 2 The two electrodes are arranged at intervals on both sides of the substrate 10 in the z direction.

[0098] Thus, the fourth line 413 is coupled to the second line 421 through the coupling branch 4131 , thereby increasing the coupling area and improving the coupling efficiency.

[0099] In another embodiment of the present application, the first line 411 is provided with a first wide segment 4111, the second line 421 is provided with a second wide segment 4211, the width dimension of the first wide segment 4111 is the same as the width dimension of the second wide segment 4211 and is arranged accordingly, the third line 412 is connected to the first wide segment 4111, and the width dimension of the coupling branch 4131 is smaller than the width dimension of the second wide segment 4211, so that the coupling branch 4131 is located between the two ends in the width direction of the second wide segment 4211 coupled thereto.

[0100] Specifically, Figure 2 As shown, taking the first wide section 4111 and the second width of the first feeding network 401 as an example, the first wide section 4111 of the first feeding network 401 is along Figure 2 The second wide section 4211 of the first feeding network 401 extends in the x direction. Figure 2 The first wide section 4111 and the second wide section 4211 extend in the x direction. Figure 2 The positions in the y direction are the same, so that the first wide section 4111 and the second wide section 4211 are along Figure 2 The y direction is arranged correspondingly.

[0101] The width of the first wide section 4111 of the first feeding network 401 is Figure 2 The width of the second wide section 4211 of the first feeding network 401 is the width of the second wide section 4211 of the first feeding network 401 along the y direction. Figure 2 The dimension in the y direction is the width dimension of the coupling branch 4131 of the second feeding network 402. Figure 2 In terms of the dimension in the y direction, the width of the second wide segment 4211 is greater than the width of the coupling branch 4131 coupled thereto, so as to improve the coupling efficiency between the coupling branch 4131 and the second wide segment 4211. The width of the first wide segment 4111 is the same as the width of the corresponding second wide segment 4211 to form a parallel double-line structure.

[0102] Thus, by setting the first wide section 4111 and the second wide section 4211 , the shape of the second line 421 of the first feeding network 401 matches the shape of the coupling branch 4131 of the second feeding network 402 , thereby improving the coupling efficiency between the fourth line 413 and the corresponding second line 421 .

[0103] In some embodiments of the present application, taking the first feeding network 401 as an example, the spacing between the first wide segment 4111 and its corresponding second wide segment 4211 is smaller than the spacing between the portion of the first line 411 other than the first wide segment 4111 and the portion of the second line 421 other than the second wide segment 4211 .

[0104] Therefore, by adjusting the interval between the first wide section 4111 and the corresponding second wide section 4211 , the impedance between the first line 411 and the second line 421 can be adjusted to make the impedance distribution of the first line 411 and the second line 421 uniform.

[0105] For example, in some embodiments provided in this application, Figure 2 and Figure 5 As shown, taking the first feeding network 401 as an example, the width dimension of the portion of the first line 411 excluding the first wide segment 4111 in the y direction in the figure is 0.3 mm, the width dimension of the portion of the second line 421 excluding the second wide segment 4211 in the y direction in the figure is 0.3 mm, and the spacing dimension of the portion of the first line 411 excluding the first wide segment 4111 and the portion of the second line 421 excluding the second wide segment 4211 in the y direction in the figure is 1.5 mm;

[0106] The width dimension of the first wide segment in the y direction in the figure is 2.7 mm, the length dimension of the first wide segment in the x direction in the figure is 40.5 mm, the width dimension of the second wide segment 4211 in the y direction in the figure is 2.7 mm, the length dimension of the second wide segment 4211 in the x direction in the figure is 40.5 mm, the spacing between the first wide segment 4111 and the second wide segment 4211 in the y direction in the figure is 0.3 mm, the length dimensions of the first line 411 on both sides of the first wide segment 4111 in the x direction in the figure are both 40.5 mm, and the length dimensions of the second line 421 on both sides of the second wide segment 4211 in the x direction in the figure are both 40.5 mm;

[0107] The width of the third line 412 in the x-direction in the figure is 2.6 mm, the width of the gap 414 is 1 mm, the width of the coupling branch 4131 in the x-direction in the figure is 2.5 mm, and the length of the coupling branch 4131 in the y-direction in the figure is 14 mm.

[0108] The antenna array in the above exemplary embodiment is applicable to the 5G frequency band. Specifically, the antenna array in the above exemplary embodiment is applicable to the 5 GHz to 6 GHz frequency band or the 5 GHz to 6.5 GHz frequency band.

[0109] An embodiment of the present application further provides a wireless terminal, which includes the array antenna 100 of any one of the above embodiments.

[0110] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An array antenna, characterized in that: include: A substrate and a plurality of antenna array elements, wherein the substrate comprises a first surface and a second surface opposite to each other, and the plurality of antenna array elements are distributed on one or both of the first surface and the second surface at intervals along an extension direction of the first surface; A first feeding network and a second feeding network, wherein the first feeding network is arranged on the first surface and connected to the plurality of antenna array elements, the second feeding network is arranged on the second surface and connected to the plurality of antenna array elements, and at least one of the first feeding network and the second feeding network is connected to a feed source, and at least a portion of the first feeding network and at least a portion of the second feeding network are coupled and connected.

2. The array antenna according to claim 1, wherein: The first feeding network and the second feeding network have the same shape and are arranged orthogonally.

3. The array antenna according to claim 2, characterized in that: The first feeding network and the second feeding network both include a first network and a second network, the first network is connected to the feed source and to a part of the array elements, the second network is connected to another part of the array elements, and a part of the second network is coupled to a part of the first network.

4. The array antenna according to claim 3, characterized in that: The first net includes first wires, the second net includes second wires, and the first wires are arranged parallel to and spaced from the second wires to form a parallel double-wire structure.

5. The array antenna according to claim 4, characterized in that: There are a plurality of the second nets, the first net is sandwiched between two of the second nets, the first net includes a plurality of first lines, the plurality of first lines are arranged in parallel and at intervals, and the plurality of first lines are arranged in one-to-one correspondence with the plurality of second nets.

6. The array antenna according to claim 5, characterized in that: The first net further includes a third line and a fourth line, there are two first lines, one end of the third line is connected to one of the two first lines, the other end of the third line is connected to the other of the two first lines, and the fourth line is arranged between the first lines and intersects with the third line; A gap is provided at the intersection of the third line and the fourth line, and the gap cuts off the third line and the fourth line.

7. The array antenna according to claim 6, characterized in that: The third line of one of the first feeding network and the second feeding network is arranged in parallel with the fourth line of the other of the first feeding network and the second feeding network along the spacing direction of the first surface and the second surface to form a parallel double-line structure.

8. The array antenna according to claim 6, characterized in that: An end of the fourth line of the first feeding network is coupled and connected to the second line of the second feeding network, and an end of the fourth line of the second feeding network is coupled and connected to the second line of the first feeding network.

9. The array antenna according to claim 8, characterized in that: A coupling branch is provided at the end of the fourth line, and the coupling branch of the first feeding network is arranged in parallel with a portion of the second line of the second feeding network along the spacing direction between the first surface and the second surface, and the coupling branch of the second feeding network is arranged in parallel with a portion of the second line of the first feeding network along the spacing direction between the first surface and the second surface.

10. The array antenna according to claim 9, characterized in that: The first line is provided with a first wide segment, the second line is provided with a second wide segment, the width dimension of the first wide segment is the same as the width dimension of the second wide segment and is arranged correspondingly, the third line is connected to the first wide segment, and the width dimension of the coupling branch is smaller than the width dimension of the second wide segment, so that the coupling branch is located between the two ends in the width direction of the second wide segment to which it is coupled.

11. A wireless terminal, characterized in that: Comprising the array antenna as claimed in any one of claims 1 to 10.

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