Array antenna and communication device

Abstract

The utility model provides an array antenna and communication equipment, the array antenna comprises a substrate, at least one radiator and a feed network, and the substrate comprises a first surface and a second surface which are arranged in parallel and at an interval; the radiator is arranged on at least one of the first surface and the second surface; the feed network comprises a first connecting wire arranged on the second surface and a first overline part arranged on the first surface, the second feed network comprises a second connecting wire arranged on the second feed network, the first connecting wire is provided with a first fracture, one end of the first fracture is electrically connected with one end of the first overline part, and the other end of the first fracture is electrically connected with the other end of the first overline part; the extension directions of the first wire and the second wire form an included angle, and the second wire penetrates through the first fracture. The array antenna provided by the utility model has the advantages that the feed network structure is simple, and the transmission path of signals in the feed network is short.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and more particularly relates to an array antenna and a communication device. BACKGROUND

[0002] The array antenna transmits the electrical signal in the feed source to the multiple radiators arranged in an array through a feed network, the multiple radiators generate a radiation beam under the excitation of the electrical signal, the array antenna has the advantages of flexible beam control, strong anti-interference ability, high signal gain, etc., so that the array antenna has a wide application prospect in the fields of communication, radar, navigation and imaging. However, the feed network structure of the array antenna in the related art is complex, and the transmission path of the signal in the feed network is relatively long, so that the sidelobe suppression of the array antenna is poor and the communication quality is poor. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiments of the present application is to provide an array antenna and a communication device to solve the technical problems of poor sidelobe suppression and poor communication quality of the array antenna in the prior art.

[0004] In a first aspect, the present application provides an array antenna.

[0005] The array antenna provided by the present application comprises a substrate, the substrate comprises a first surface and a second surface arranged in parallel and spaced apart; at least one radiator, the radiator is arranged on at least one of the first surface and the second surface; a feed network comprising a first wiring arranged on the second surface and a first cross-line part arranged on the first surface, the second feed network comprising a second wiring arranged on the second feed network, the first wiring being provided with a first break, one end of the first break being electrically connected to one end of the first cross-line part, the other end of the first break being electrically connected to the other end of the first cross-line part, the extension directions of the first wiring and the second wiring having an included angle, and the second wiring penetrating the first break.

[0006] The array antenna provided by the present application has the beneficial effects that the path composed of the first wiring and the first cross-line part in the feed network of the array antenna provided by the present application can intersect with the second wiring through the first cross-line part, so that the first wiring and the second wiring do not need to avoid each other by winding, thereby shortening the path length of the electrical signal in the first wiring or the second wiring, thereby reducing the sidelobe strength excited by the electrical signal in the feed network, so that the array antenna provided by the present application has the advantages of good sidelobe suppression effect and high communication quality.

[0007] Optionally, the feeding network further comprises a third wire disposed on the first surface, the second feeding network further comprises a fourth wire disposed on the first surface and a second cross-wire portion disposed on the second surface, the fourth wire is provided with a second break, one end of the second break is electrically connected with one end of the second cross-wire portion, the other end of the second break is electrically connected with the other end of the second cross-wire portion, the third wire and the fourth wire have an included angle in the extending direction, and the third wire penetrates through the second break.

[0008] Optionally, the first cross-wire portion is partially overlapped with the second cross-wire portion in the orthographic projection on the first surface.

[0009] Optionally, the feeding network comprises a first input port and a second input port, a part of the first input port is disposed on the first cross-wire portion, another part of the first input port is disposed on the third wire, a part of the second input port is disposed on the second wire, and another part of the second input port is disposed on the second cross-wire portion.

[0010] The first wire and the third wire are both coupled with the end portion of the radiator along the first direction, and the second wire and the fourth wire are both coupled with the end portion of the radiator along the second direction.

[0011] Optionally, the radiator has a plurality of radiators, the plurality of radiators comprises a first patch, a second patch, a third patch and a fourth patch, the first patch and the second patch are arranged in parallel along a first direction, the third patch is arranged in parallel with the first patch along a second direction, the fourth patch is arranged in parallel with the second patch along the second direction, and the fourth patch is arranged in parallel with the third patch along the first direction.

[0012] The first wire is connected between the first patch and the third patch, the third wire is connected between the second patch and the fourth patch, the first wire and the second wire are both located between the first patch and the third patch, the second wire is connected between the third patch and the fourth patch, the fourth wire is connected between the first patch and the second patch, and the second wire and the fourth wire are both located between the first patch and the second patch.

[0013] Optionally, the first wire is connected between the first patch and the third patch, the third wire is connected between the second patch and the fourth patch, and the orthographic projection of the first wire on the first surface is partially overlapped with the orthographic projection of the third wire on the first surface.

[0014] The second wire is connected between the third patch and the fourth patch, the fourth wire is connected between the first patch and the second patch, and the third wire partially overlaps with the fourth wire in the orthographic projection of the first surface.

[0015] Optionally, the first cross-wire part is provided with a first input port, the third wire is provided with a second input port, and the phase difference between the electrical signal input by the first input port and the electrical signal input by the second input port is 180°.

[0016] The second cross-wire part is provided with a third input port, the second wire is provided with a fourth input port, and the phase difference between the electrical signal input by the third input port and the electrical signal input by the fourth input port is 180°.

[0017] Optionally, the distance between the first input port and the second patch is the same as the distance between the first input port and the fourth patch, and the distance between the second input port and the first patch is the same as the distance between the second input port and the third patch.

[0018] The distance between the third input port and the first patch is the same as the distance between the third input port and the second patch, and the distance between the fourth input port and the third patch is the same as the distance between the fourth input port and the fourth patch.

[0019] Optionally, the first wire is provided with a first coupling branch and a second coupling branch at two ends thereof, the first coupling branch and the second coupling branch both extend along the second direction, and the first coupling branch is arranged apart from the second patch and the second coupling branch is arranged apart from the fourth patch.

[0020] The third wire is provided with a third coupling branch and a fourth coupling branch at two ends thereof, the third coupling branch and the fourth coupling branch both extend along the second direction, and the third coupling branch is arranged apart from the first patch and the fourth coupling branch is arranged apart from the third patch.

[0021] The second wire is provided with a fifth coupling branch and a sixth coupling branch at two ends thereof, the fifth coupling branch and the sixth coupling branch both extend along the first direction, and the fifth coupling branch is arranged apart from the third patch and the sixth coupling branch is arranged apart from the fourth patch.

[0022] The fourth wire is provided with a seventh coupling branch and an eighth coupling branch at two ends respectively, the seventh coupling branch and the eighth coupling branch extend along the first direction, and the seventh coupling branch is arranged apart from the first patch and the eighth coupling branch is arranged apart from the second patch.

[0023] In a second aspect, the present application provides a communication device.

[0024] The communication device provided by the present application comprises the array antenna described in any of the above embodiments.

[0025] It can be understood that the beneficial effects of the above-mentioned second aspect can be referred to the related description in the above-mentioned first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0027] Figure 1 Structure diagram of the array antenna provided by the embodiment of the present application Figure 1 ;

[0028] Figure 2 Structure diagram of the array antenna provided by the embodiment of the present application Figure 2 ;

[0029] Figure 3 The first surface of the array antenna provided by the embodiment of the present application is shown in the diagram.

[0030] Figure 4 The second surface of the array antenna provided by the embodiment of the present application is shown in the diagram.

[0031] In the diagram, various reference signs are as follows:

[0032] 100, array antenna;

[0033] 10, substrate; 11, first surface; 12, second surface;

[0034] 20, radiator; 21, first patch; 22, second patch; 23, third patch; 24, fourth patch;

[0035] 30, feed network; 31, first connection; 311, first break; 312, first coupling stub; 313, second coupling stub; 32, second connection; 321, fourth port; 322, fifth coupling stub; 323, sixth coupling stub; 33, third connection; 331, second port; 332, third coupling stub; 333, fourth coupling stub; 34, fourth connection; 341, second break; 342, seventh coupling stub; 343, eighth coupling stub; 35, first crossover; 351, first port; 36, second crossover; 361, third port; 301, first input port; 302, second input port. DETAILED DESCRIPTION

[0036] In order to make the technical problems solved by the present application, the technical solutions and the beneficial effects clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0037] It should be noted that when an element is referred to as being "fixed" or "set" 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.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In addition, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0040] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the array antenna 100 provided by the embodiments of the present application will be described.

[0041] The array antenna 100 comprises a substrate 10, the substrate 10 comprising a first surface 11 and a second surface 12 arranged in parallel and spaced apart; at least one radiator 20, the radiator 20 being arranged on at least one of the first surface 11 and the second surface 12; a feed network 30 comprising a first wire 31 arranged on the second surface 12 and a first cross-wire part 35 arranged on the first surface 11, and a second feed network comprising a second wire 32 arranged on the second feed network, the first wire 31 being provided with a first break 311, one end of the first break 311 being connected to one end of the first cross-wire part 35 through a via, and the other end of the first break 311 being connected to the other end of the first cross-wire part 35 through a via, the first wire 31 and the second wire 32 having an included angle in the extension direction, and the second wire 32 penetrating the first break 311.

[0042] It should be noted that the first direction in the following is the x direction shown in the figure, the second direction in the following is the y direction shown in the figure, and the third direction in the following is the z direction shown in the figure.

[0043] As shown in Figure 1 and Figure 2 , the first surface 11 and the second surface 12 both extend along the xOy plane shown in the figure, and the first surface 11 and the second surface 12 are arranged spaced apart along the third direction z, and the material of the substrate 10 can comprise one or more materials with a relatively low dielectric constant, such as FR4 (epoxy resin-based glass fiber composite material), RO4003C (glass cloth reinforced, ceramic filled hydrocarbon material), etc.

[0044] The radiator 20 can be a metal patch or a metal etching pattern, as shown in Figure 3 , the radiator 20 is arranged on the first surface 11, and the radiator 20 can generate electromagnetic oscillation under the excitation of the electrical signal input by the feed network 30 to radiate a beam through the radiator 20.

[0045] As shown in Figure 4 , the first wire 31 and the second wire 32 are both arranged on the second surface 12, and the extension direction of the first wire 31 and the extension direction of the second wire 32 intersect, the first break 311 is provided on the first wire 31 to allow the first wire 31 to avoid the second wire 32, and the two ends of the first wire 31 at the first port 351 are connected to the first cross-wire part 35 on the first surface 11 through the metalized vias, to avoid the first wire 31 and the second wire 32 from contacting, thereby reducing the mutual crosstalk between the electrical signal in the first wire 31 and the electrical signal in the second wire 32.

[0046] The first wiring 31 and the first cross-line part 35 of the feed network 30 of the array antenna 100 provided in the application constitute a passage that can intersect the second wiring 32 through the first cross-line part 35 in a different plane, so that the first wiring 31 and the second wiring 32 do not need to avoid each other by winding, thereby shortening the path length of the electrical signal in the first wiring 31 or the second wiring 32, reducing the side lobe strength excited by the electrical signal in the feed network 30, and making the array antenna 100 provided in the application have the advantages of better side lobe suppression effect and higher communication quality.

[0047] In some embodiments provided in the application, a plurality of vias are arranged in the substrate, the vias penetrate the substrate 10 along the third direction z, and the inner walls of the vias are coated with a metal conductor material. The two ends of the first wiring 31 at the first break 311 are respectively connected to the two ends of the first cross-line part 35 through the vias, so that the first wiring 31 and the first cross-line part 35 are electrically connected, and the electrical signal in the first wiring 31 can be conducted from the first cross-line part 35 across the first break 311.

[0048] In some embodiments provided in the application, the feed network 30 further includes a third wiring 33 arranged on the first surface 11, and the second feed network further includes a fourth wiring 34 arranged on the first surface 11 and a second cross-line part 36 arranged on the second surface 12. The fourth wiring 34 is provided with a second break 341. One end of the second break 341 is connected to one end of the second cross-line part 36 through a via, and the other end of the second break 341 is connected to the other end of the second cross-line part 36 through a via. The third wiring 33 and the fourth wiring 34 have an included angle in the extension direction, and the third wiring 33 penetrates the second break 341.

[0049] As shown in Figure 3 The third wiring 33 and the fourth wiring 34 are both arranged on the first surface 11, and the extension direction of the third wiring 33 intersects the extension direction of the fourth wiring 34. The second break 341 is arranged on the fourth wiring 34 to make the fourth wiring 34 avoid the third wiring 33. The fourth wiring 34 at the two ends of the second port 331 is respectively connected to the second cross-line part 36 on the second surface 12 through the metalized vias, so as to avoid the contact between the third wiring 33 and the fourth wiring 34, thereby reducing the mutual crosstalk between the electrical signal in the third wiring 33 and the electrical signal in the fourth wiring 34.

[0050] In some embodiments provided in the application, a plurality of vias are arranged in the substrate, the vias penetrate the substrate 10 along the third direction z, and the inner walls of the vias are coated with a metal conductor material. The two ends of the fourth wiring 34 at the second break 341 are respectively connected to the two ends of the second cross-line part 36 through the vias, so that the fourth wiring 34 and the second cross-line part 36 are electrically connected, and the electrical signal in the fourth wiring 34 can be conducted from the second cross-line part 36 across the second break 341.

[0051] In some embodiments provided by the present application, the first cross-line portion 35 is partially overlapped with the second cross-line portion 36 in the orthographic projection of the first surface 11.

[0052] As shown in Figure 3 , the first cross-line portion 35 and the third connecting line 33 both extend through the second break 341, the second cross-line portion 36 and the second connecting line 32 both extend through the first break 311, the plurality of passages all extend through the second break 341, and the plurality of passages all extend through the first break 311, thereby reducing the number of the first breaks 311 and the number of the first cross-line portions 35 arranged on the first connecting line 31, and reducing the number of the second breaks 341 and the number of the second cross-line portions 36 arranged on the fourth connecting line 34.

[0053] Therefore, the number of times of impedance change when the signal is transmitted in the first connecting line 31 or the fourth connecting line 34 is reduced, and the impedance change in the first connecting line 31 and the fourth connecting line 34 is gentle, thereby improving the efficiency of signal transmission in the feeding network 30.

[0054] In some embodiments provided by the present application, the feeding network 30 comprises a first input port 301 and a second input port 302, a part of the first input port 301 is arranged on the first cross-line portion 35, another part of the first input port 301 is arranged on the third connecting line 33, a part of the second input port 302 is arranged on the second connecting line 32, and another part of the second input port 302 is arranged on the second cross-line portion 36.

[0055] The first connecting line 31 and the third connecting line 33 are both coupled to the end of the radiator 20 along the first direction x, and the second connecting line 32 and the fourth connecting line 34 are both coupled to the end of the radiator 20 along the second direction y.

[0056] As shown in Figure 3 and Figure 4 , the electrical signal at the first input port 301 is transmitted along the feeding network 30 and input into the radiator 20 at the end of the radiator 20 towards the first direction x, and the electrical signal at the second input port 302 is transmitted along the feeding network 30 and input into the radiator 20 at the end of the radiator 20 towards the second direction y.

[0057] Therefore, the polarization direction of the beam generated by the radiator 20 excited by the electrical signal at the first input port 301 is orthogonal to the polarization direction of the beam generated by the radiator 20 excited by the electrical signal at the second input port 302, thereby improving the beam coverage range of the array antenna 100 provided by the present application.

[0058] In some embodiments, the first input port 301 and the second input port 302 can be connected to the same feed source. Therefore, the electrical signal of the same feed source can simultaneously generate the polarized beam of the first direction x and the polarized beam of the second direction y.

[0059] In other embodiments, the first input port 301 is connected to the first feed source (not shown in the figure), and the second input port 302 is connected to the second feed source (not shown in the figure). Thus, the electrical signal input to the first feed source feed network 30 generates a polarized beam in the first direction x, and the electrical signal input to the second feed source feed network 30 generates a polarized beam in the second direction y, thereby improving the isolation between the first and second feed sources, and further improving the bandwidth and radiation efficiency of the array antenna 100 provided in this application.

[0060] In some embodiments provided in this application, there are multiple radiators 20, each including a first patch 21, a second patch 22, a third patch 23, and a fourth patch 24. The first patch 21 and the second patch 22 are arranged parallel to each other along a first direction x, the third patch 23 is arranged parallel to the first patch 21 along a second direction y, and the fourth patch 24 is arranged parallel to the second patch 22 along the second direction y and the fourth patch 24 is arranged parallel to the third patch 23 along the first direction x.

[0061] like Figure 1 As shown, the radiator 20 is a rectangular patch. The first patch 21, the second patch 22, the third patch 23 and the fourth patch 24 are arranged in a rectangular array along the first direction x and the second direction y. The first patch 21 and the second patch 22 are located on the same side of the third patch 23 and the fourth patch 24 in the second direction y, and the first patch 21 and the third patch 23 are located on the same side of the second patch 22 and the fourth patch 24 in the first direction x.

[0062] The first wire 31 is connected between the first patch 21 and the third patch 23, the third wire 33 is connected between the second patch 22 and the fourth patch 24, and both the first wire 31 and the second wire 32 are located between the first patch 21 and the third patch 23, the second wire 32 is connected between the third patch 23 and the fourth patch 24, and the fourth wire 34 is connected between the first patch 21 and the second patch 22, and both the second wire 32 and the fourth wire 34 are located between the first patch 21 and the second patch 22.

[0063] like Figure 3 and Figure 4 As shown, the first wire 31 and the third wire 33 extend along the second direction y, such that the first wire 31 and the second wire 32 are located between the first patch 21 and the second patch 22, and the first wire 31 and the second wire 32 are also located between the third patch 23 and the fourth patch 24. The second wire 32 and the fourth wire 34 extend along the first direction x, such that the second wire 32 and the fourth wire 34 are located between the first patch 21 and the third patch 23, and the second wire 32 and the fourth wire 34 are also located between the second patch 22 and the fourth patch 24.

[0064] Therefore, the feeding network 30 is located inside the patch array composed of the plurality of radiators 20, compared with the prior art technical solution that part of the feeding network 30 extends to the outside of the patch array, on the one hand, the structure of the feeding network 30 of the array antenna 100 provided by the present application is simple, and the transmission path of the electrical signal in the feeding network 30 is small, on the other hand, the array antenna 100 provided by the present application makes full use of the gap space between the plurality of radiators 20, reduces the size of the array antenna 100 in the first direction x and the size of the array antenna 100 in the second direction y, and realizes the miniaturization of the array antenna 100.

[0065] In some embodiments provided by the present application, the first wire 31 is connected between the first patch 21 and the third patch 23, the third wire 33 is connected between the second patch 22 and the fourth patch 24, and the orthogonal projection of the first wire 31 on the first surface 11 partially overlaps the orthogonal projection of the third wire 33 on the first surface 11.

[0066] As shown in Figure 1 , Figure 3 and Figure 4 , the third wire 33 extends along the second direction y, the first wire 31 extends along the second direction y, and a part of the first wire 31 between the first cross-wire part 35 and the second patch 22 and a part of the third wire 33 are arranged in overlap along the third direction z, so that the part of the first wire 31 between the first cross-wire part 35 and the second patch 22 and the part of the third wire 33 form a non-planar parallel double-wire structure, and another part of the first wire 31 between the first cross-wire part 35 and the fourth patch 24 and another part of the third wire 33 are arranged in overlap along the third direction z, so that the part of the first wire 31 between the first cross-wire part 35 and the fourth patch 24 and the part of the third wire 33 form a non-planar parallel double-wire structure.

[0067] Therefore, the part of the third wire 33 and the part of the first wire 31 form a non-planar parallel double-wire structure, the electromagnetic field generated by the electrical signal in the first wire 31 and the electromagnetic field generated by the electrical signal in the third wire 33 offset each other, resulting in that the electromagnetic radiation generated in the transmission process of the electrical signal of the first input port 301 in the first wire 31 and the third wire 33 is small, thereby reducing the side lobe strength of the array antenna 100 provided by the present application and improving the radiation performance of the array antenna 100 provided by the present application.

[0068] At the same time, due to the offset effect of the electromagnetic field, the first input port 301 has strong resistance to external electromagnetic interference when transmitting in the first wire 31 and the third wire 33, which helps to ensure the stability of signal transmission.

[0069] The second wire 32 is connected between the third patch 23 and the fourth patch 24, the fourth wire 34 is connected between the first patch 21 and the second patch 22, and the third wire 33 partially overlaps the fourth wire 34 in the first surface 11 in the orthographic projection.

[0070] As shown in Figure 1 , Figure 3 and Figure 4 , the second wire 32 extends along the first direction x, the fourth wire 34 extends along the first direction x, and a part of the fourth wire 34 between the second cross-wire part 36 and the first patch 21 and a part of the second wire 32 are arranged in overlapping manner along the third direction z, so that the part of the fourth wire 34 between the second cross-wire part 36 and the first patch 21 and the part of the second wire 32 form a non-planar parallel double-wire structure, and another part of the fourth wire 34 between the second cross-wire part 36 and the second patch 22 and another part of the second wire 32 are arranged in overlapping manner along the third direction z, so that the part of the fourth wire 34 between the second cross-wire part 36 and the second patch 22 and the part of the third wire 33 form a non-planar parallel double-wire structure.

[0071] Therefore, the part of the fourth wire 34 and the part of the second wire 32 form a non-planar parallel double-wire structure, and the electromagnetic field generated by the electrical signal in the fourth wire 34 and the electromagnetic field generated by the electrical signal in the second wire 32 cancel each other out, resulting in less electromagnetic radiation generated by the electrical signal in the second input port 302 during transmission in the second wire 32 and the fourth wire 34, thus reducing the side lobe strength of the array antenna 100 provided in the present application and improving the radiation performance of the array antenna 100 provided in the present application.

[0072] Meanwhile, due to the cancellation effect of the electromagnetic field, the second input port 302 has strong resistance to external electromagnetic interference during transmission in the second wire 32 and the fourth wire 34, which helps to ensure the stability of signal transmission.

[0073] In some embodiments provided in the present application, the first input port 301 includes a first port 351 arranged on the first cross-wire part 35, and the first input port 301 further includes a second port 331 arranged on the third wire 33, and the phase difference between the electrical signal input into the first cross-wire part 35 by the first port 351 and the electrical signal input into the third wire 33 by the second port 331 is 180°.

[0074] As shown in Figure 3 and Figure 4 , the first port 351 and the second port 331 are arranged in spaced-apart manner along the first direction x, and in some embodiments, the first port 351 is connected to the positive pole of the first feed source, and the second port 331 is connected to the negative pole of the first feed source, so that the electrical signal at the first port 351 and the electrical signal at the second port 331 have a phase difference of 180°.

[0075] Thus, on the one hand, the electrical signal inputted into the second patch 22 by the first port 351 has a 180° phase difference with the electrical signal inputted into the first patch 21 by the second port 331, so that the first patch 21 and the second patch 22 realize the same direction radiation under the excitation of the first feed, on the other hand, the electrical signal inputted into the fourth patch 24 by the first port 351 has a 180° phase difference with the electrical signal inputted into the third patch 23 by the second port 331, so that the third patch 23 and the fourth patch 24 realize the same direction radiation under the excitation of the first feed.

[0076] The second input port 302 comprises a third port 361 arranged on the second wire 32, and further comprises a fourth port 321 arranged on the second cross-line part 36, the phase difference between the electrical signal inputted into the second wire 32 by the third port 361 and the electrical signal inputted into the second cross-line part 36 by the fourth port 321 is 180°.

[0077] As shown in Figure 3 and Figure 4 , the third port 361 and the fourth port 321 are arranged at intervals along the second direction y, in some embodiments, the third port 361 is connected with the positive electrode of the second feed, and the fourth port 321 is connected with the negative electrode of the second feed, so that the electrical signal at the third port 361 has a 180° phase difference with the electrical signal at the fourth port 321.

[0078] Thus, on the one hand, the electrical signal inputted into the first patch 21 by the third port 361 has a 180° phase difference with the electrical signal inputted into the third patch 23 by the fourth port 321, so that the first patch 21 and the third patch 23 realize the same direction radiation under the excitation of the second feed, on the other hand, the electrical signal inputted into the second patch 22 by the third port 361 has a 180° phase difference with the electrical signal inputted into the fourth patch 24 by the fourth port 321, so that the second patch 22 and the fourth patch 24 realize the same direction radiation under the excitation of the second feed.

[0079] In some embodiments provided in the present application, the distance between the first port 351 and the second patch 22 is the same as the distance between the first port 351 and the fourth patch 24, and the distance between the second port 331 and the first patch 21 is the same as the distance between the second port 331 and the third patch 23.

[0080] As shown in Figure 3 and Figure 4As shown, the first port 351 is located in the middle of the second patch 22 and the fourth patch 24, and the distance between the first port 351 and the second patch 22 is the same as the distance between the first port 351 and the fourth patch 24, and the length of the first wire 31 between the first port 351 and the second patch 22 is the same as the length of the first wire 31 between the first port 351 and the fourth patch 24, so that the path length of the electrical signal of the first port 351 to the second patch 22 is the same as the path length of the electrical signal of the first port 351 to the fourth patch 24.

[0081] Therefore, the electrical signal transmitted from the first port 351 to the second patch 22 and the electrical signal transmitted from the first port 351 to the fourth patch 24 are the same in phase, so that the second patch 22 and the fourth patch 24 produce the same direction radiation under the excitation of the electrical signal at the first port 351.

[0082] As shown in Figure 3 and Figure 4 , the second port 331 is located in the middle of the first patch 21 and the third patch 23, and the distance between the second port 331 and the first patch 21 is the same as the distance between the second port 331 and the third patch 23, and the length of the third wire 33 between the second port 331 and the first patch 21 is the same as the length of the third wire 33 between the second port 331 and the third patch 23, so that the path length of the electrical signal of the second port 331 to the first patch 21 is the same as the path length of the electrical signal of the second port 331 to the third patch 23.

[0083] Therefore, the electrical signal transmitted from the second port 331 to the first patch 21 and the electrical signal transmitted from the second port 331 to the third patch 23 are the same in phase, so that the first patch 21 and the third patch 23 produce the same direction radiation under the excitation of the electrical signal at the second port 331.

[0084] The distance between the third port 361 and the first patch 21 is the same as the distance between the third port 361 and the second patch 22, and the distance between the fourth port 321 and the third patch 23 is the same as the distance between the fourth port 321 and the fourth patch 24.

[0085] As shown in Figure 3 and Figure 4 , the third port 361 is located in the middle of the first patch 21 and the second patch 22, and the distance between the third port 361 and the first patch 21 is the same as the distance between the third port 361 and the second patch 22, and the length of the fourth wire 34 between the third port 361 and the first patch 21 is the same as the length of the fourth wire 34 between the third port 361 and the second patch 22, so that the path length of the electrical signal of the third port 361 to the first patch 21 is the same as the path length of the electrical signal of the third port 361 to the second patch 22.

[0086] Thus, the electrical signal transmitted from the third port 361 to the first patch 21 and the electrical signal transmitted from the third port 361 to the second patch 22 are in the same phase, so that the first patch 21 and the second patch 22 generate the same direction radiation under the excitation of the electrical signal at the first port 351.

[0087] As shown in Figure 4 and Figure 3 , the fourth port 321 is located in the middle of the third patch 23 and the fourth patch 24, and the distance between the fourth port 321 and the third patch 23 and the distance between the fourth port 321 and the fourth patch 24 are the same, and the length of the second wire 32 between the fourth port 321 and the third patch 23 is the same as the length of the second wire 32 between the fourth port 321 and the fourth patch 24, so that the path length of the electrical signal transmitted from the fourth port 321 to the third patch 23 is the same as the path length of the electrical signal transmitted from the second port 331 to the fourth patch 24.

[0088] Thus, the electrical signal transmitted from the third port 361 to the first patch 21 and the electrical signal transmitted from the third port 361 to the second patch 22 are in the same phase, so that the first patch 21 and the second patch 22 generate the same direction radiation under the excitation of the electrical signal at the first port 351.

[0089] In summary, the first patch 21, the second patch 22, the third patch 23 and the fourth patch 24 all generate the same direction radiation under the excitation of the electrical signal in the first feed network, and the first patch 21, the second patch 22, the third patch 23 and the fourth patch 24 all generate the same direction radiation under the excitation of the electrical signal in the second feed network, so as to improve the gain of the array antenna 100 provided in the present application.

[0090] In some embodiments provided in the present application, as shown in Figure 4 , the first wire 31 is provided with a first coupling branch 312 and a second coupling branch 313 at two ends respectively, the first coupling branch 312 and the second coupling branch 313 both extend along the second direction y, and the first coupling branch 312 is arranged in parallel and spaced apart from the side line of the second patch 22 along the first direction x towards one side of the second patch 22, and the second coupling branch 313 is arranged in parallel and spaced apart from the side line of the fourth patch 24 along the first direction x towards one side of the third patch 23.

[0091] Thus, one end of the first wire 31 is capacitively coupled to the edge of the second patch 22 along the first direction x toward the side of the first patch 21 via the first coupling stub 312, and the other end of the first wire 31 is capacitively coupled to the edge of the fourth patch 24 along the first direction x toward the side of the third patch 23 via the second coupling stub 313, thereby widening the impedance bandwidth when the electrical signal is transmitted from the first wire 31 to the second patch 22 or from the first wire 31 to the fourth patch 24.

[0092] like Figure 3 As shown, the two ends of the third connection 33 are respectively provided with a third coupling branch 332 and a fourth coupling branch 333. Both the third coupling branch 332 and the fourth coupling branch 333 extend along the second direction y. The third coupling branch 332 is arranged parallel to the edge line of the first patch 21 along the first direction x toward the side of the second patch 22, and the fourth coupling branch 333 is arranged parallel to the edge line of the third patch 23 along the first direction x toward the side of the fourth patch 24.

[0093] Thus, one end of the third wire 33 is capacitively coupled to the edge of the first patch 21 along the first direction x toward the second patch 22 via the third coupling stub 332, and the other end of the third wire 33 is capacitively coupled to the edge of the third patch 23 along the first direction x toward the fourth patch 24 via the fourth coupling stub 333, thereby widening the impedance bandwidth when the electrical signal is transmitted from the third wire 33 to the first patch 21 or from the third wire 33 to the third patch 23.

[0094] like ​ As shown, the two ends of the second wiring 32 are respectively provided with a fifth coupling branch 322 and a sixth coupling branch 323. Both the fifth coupling branch 322 and the sixth coupling branch 323 extend along the first direction x. The fifth coupling branch 322 and the third patch 23 are arranged parallel to each other on the edge line of the third patch 23 in the second direction y toward the side of the first patch 21. The sixth coupling branch 323 and the fourth patch 24 are arranged parallel to each other on the edge line of the fourth patch 24 in the second direction y toward the side of the second patch 22.

[0095] Thus, through the fifth coupling stub 322, one end of the second wire 32 is capacitively coupled to the edge of the third patch 23 along the second direction y toward the first patch 21, and through the sixth coupling stub 323, the other end of the second wire 32 is capacitively coupled to the edge of the fourth patch 24 along the second direction y toward the second patch 22, so as to widen the impedance bandwidth when the electrical signal is transmitted from the second wire 32 to the third patch 23 or from the second wire 32 to the fourth patch 24.

[0096] like ​As shown, the fourth wire 34 is provided with a seventh coupling branch 342 and an eighth coupling branch 343 at two ends respectively, the seventh coupling branch 342 and the eighth coupling branch 343 both extend along the first direction x, and the seventh coupling branch 342 is arranged in parallel with the edge line of the first patch 21 on the side close to the third patch 23 along the second direction y, and the eighth coupling branch 343 is arranged in parallel with the edge line of the second patch 22 on the side close to the fourth patch 24 along the second direction y.

[0097] Therefore, one end of the fourth wire 34 is connected to the first patch 21 through the seventh coupling branch 342 in a capacitive coupling manner along the second direction y towards the edge line of the third patch 23, and the other end of the fourth wire 34 is connected to the second patch 22 through the eighth coupling branch 343 in a capacitive coupling manner along the second direction y towards the edge line of the fourth patch 24, so as to widen the impedance bandwidth when the electrical signal is transmitted from the fourth wire 34 to the first patch 21 or the second patch 22.

[0098] In some other embodiments (not shown in the figure), the end of the feeding network 30 is directly connected to the end of the radiator 20 in a manner of being directly fed through a microstrip line.

[0099] In some other embodiments (not shown in the figure), the end of the feeding network 30 is connected to the radiator 20 in a manner of being coupled through a slot.

[0100] A communication device provided by the present application is described below.

[0101] The communication device provided by the present application comprises the array antenna 100 in any of the above embodiments.

[0102] The array antenna 100 provided by the present application has the advantages of better suppression of side lobes by optimizing the structure of the feeding network 30, shortening the transmission path of the electrical signal in the feeding network 30, thereby better improving the antenna efficiency and the working bandwidth, and thus the array antenna 100 provided by the present application has the advantage of higher communication quality.

[0103] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An array antenna, characterized by The application relates to a substrate, a radiation body and a feed network. The substrate comprises a first surface and a second surface arranged in parallel and at intervals; The radiation body is arranged on at least one of the first surface and the second surface; The feed network comprises a first wire arranged on the second surface, a first cross-wire part arranged on the first surface and a second wire arranged on the second surface, the first wire is provided with a first break, one end of the first break is electrically connected to one end of the first cross-wire part, the other end of the first break is electrically connected to the other end of the first cross-wire part, the extension direction of the first wire and the extension direction of the second wire form an included angle, and the second wire penetrates the first break.

2. The array antenna of claim 1, wherein: The feed network further comprises a third wire arranged on the first surface, a fourth wire arranged on the first surface and a second cross-wire part arranged on the second surface, the fourth wire is provided with a second break, one end of the second break is electrically connected to one end of the second cross-wire part, the other end of the second break is electrically connected to the other end of the second cross-wire part, the extension direction of the third wire and the extension direction of the fourth wire form an included angle, and the third wire penetrates the second break.

3. The array antenna of claim 2, wherein: The first cross-wire part and the second cross-wire part partially overlap in the projection on the first surface.

4. The array antenna of claim 2, wherein: The feed network comprises a first input port and a second input port, part of the first input port is arranged on the first cross-wire part, the other part of the first input port is arranged on the third wire, part of the second input port is arranged on the second wire, and the other part of the second input port is arranged on the second cross-wire part. The first wire and the third wire are connected to the end part of the radiation body along a first direction, and the second wire and the fourth wire are connected to the end part of the radiation body along a second direction, and the first direction and the second direction are orthogonal.

5. The array antenna of claim 4, wherein: The radiation body comprises a first patch, a second patch, a third patch and a fourth patch, the first patch and the second patch are arranged in parallel along the first direction, the third patch and the first patch are arranged in parallel along the second direction, the fourth patch and the second patch are arranged in parallel along the second direction, and the fourth patch and the third patch are arranged in parallel along the first direction. The first wire is connected between the first patch and the third patch, the third wire is connected between the second patch and the fourth patch, the first wire and the second wire are located between the first patch and the third patch, the second wire is connected between the third patch and the fourth patch, the fourth wire is connected between the first patch and the second patch, and the second wire and the fourth wire are located between the first patch and the second patch.

6. The array antenna of claim 5, wherein: The projection of the first wire on the first surface and the projection of the third wire on the first surface partially overlap. The projection of the third wire on the first surface and the projection of the fourth wire on the first surface partially overlap.

7. The array antenna of claim 6, wherein: The first input port comprises a first port arranged on the first cross-line part, and further comprises a second port arranged on the third connecting line, and the phase difference between the electrical signal input by the first port and the electrical signal input by the second port is 180°; The second input port comprises a third port arranged on the second connecting line, and further comprises a fourth port arranged on the second cross-line part, and the phase difference between the electrical signal input by the third port and the electrical signal input by the fourth port is 180°.

8. The array antenna of claim 7, wherein: The distance between the first port and the second patch is the same as the distance between the first port and the fourth patch, and the distance between the second port and the first patch is the same as the distance between the second port and the third patch; The distance between the third port and the first patch is the same as the distance between the third port and the second patch, and the distance between the fourth port and the third patch is the same as the distance between the fourth port and the fourth patch.

9. The array antenna of claim 5, wherein: The first connecting line is provided with a first coupling branch and a second coupling branch at two ends thereof, the first coupling branch and the second coupling branch extend along the second direction, and the first coupling branch is arranged apart from the second patch, and the second coupling branch is arranged apart from the fourth patch; The third connecting line is provided with a third coupling branch and a fourth coupling branch at two ends thereof, the third coupling branch and the fourth coupling branch extend along the second direction, and the third coupling branch is arranged apart from the first patch, and the fourth coupling branch is arranged apart from the third patch; The second connecting line is provided with a fifth coupling branch and a sixth coupling branch at two ends thereof, the fifth coupling branch and the sixth coupling branch extend along the first direction, and the fifth coupling branch is arranged apart from the third patch, and the sixth coupling branch is arranged apart from the fourth patch; The fourth connecting line is provided with a seventh coupling branch and an eighth coupling branch at two ends thereof, the seventh coupling branch and the eighth coupling branch extend along the first direction, and the seventh coupling branch is arranged apart from the first patch, and the eighth coupling branch is arranged apart from the second patch.

10. A communication device, characterized by: An array antenna comprising any one of claims 1-9. An array antenna comprising any one of claims 1-9.

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