Array antenna and communication device

Abstract

The invention provides an array antenna and communication equipment, the array antenna comprises a dielectric substrate, a plurality of radiators and a first feed network, the radiators are arranged on the dielectric substrate, the plurality of radiator columns comprise two first columns arranged along a first direction and a second column arranged between the two first columns in the first direction, and the first feed network is arranged between the two first columns. The plurality of radiator rows comprise two first rows arranged along a first direction and a second row arranged between the two first rows in the first direction, and the first direction is orthogonal to the second direction; the first feed network is connected with the plurality of radiators, the first feed network performs unequal-amplitude feed to the first row and the second row to realize low side lobe in the second direction, and the first feed network performs unequal-amplitude feed to the first column and the second column to realize low side lobe in the first direction. The array antenna provided by the invention can realize a low side lobe effect in two directions.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and more particularly, relates to an array antenna and a communication device. Background Art

[0002] The main feature of a low sidelobe antenna is a relatively low sidelobe level, which helps improve the directivity and gain of the antenna. A low sidelobe antenna can reduce the effects of multipath and interference signals, thereby improving communication quality. Especially in urban dense areas and complex terrains, a low sidelobe antenna can ensure stable transmission of communication signals and increase the communication distance. However, the low sidelobe antennas in related technologies can only achieve the low sidelobe effect on a single plane in one polarization direction. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide an array antenna and a communication device to solve the technical problem in the existing low sidelobe antennas that the low sidelobe effect can only be achieved on a single plane in one polarization direction.

[0004] In a first aspect, the embodiments of this application provide an array antenna.

[0005] The array antenna provided in this application includes a dielectric substrate; a plurality of radiators disposed on the dielectric substrate. The radiators are arranged to form a plurality of radiator columns extending in a first direction. The plurality of radiator columns include two first columns arranged in the first direction and a second column disposed between the two first columns in the first direction. The radiators are also arranged to form a plurality of radiator rows extending in a second direction. The plurality of radiator rows include two first rows arranged in the first direction and a second row disposed between the two first rows in the first direction. The first direction is orthogonal to the second direction. A first feed network is used to connect to a first port. The first feed network is connected to the plurality of radiators. The amplitude of the electrical signal input by the first feed network to the radiators in the second column is greater than the amplitude of the electrical signal input by the first feed network to the radiators in the first column, and the amplitude of the electrical signal input by the first feed network to the radiators in the second row is greater than the amplitude of the electrical signal input by the first feed network to the radiators in the first row.

[0006] The beneficial effects of the array antenna provided by the embodiments of the present application are as follows: Compared with the prior art, the array antenna provided by the embodiments of the present application can perform unequal amplitude feeding on multiple radiators in the first row and multiple radiators in the second row through the first feed network, and the first feed network performs unequal amplitude feeding on the first column and the second column, so that the beams generated by the multiple radiators have the effect of low sidelobe radiation in the plane where the first direction is located, and the beams generated by the multiple radiators also have the effect of low sidelobe radiation in the plane where the second direction is located, thereby making the array antenna provided by the embodiments of the present application have the advantage of realizing low sidelobe radiation in both orthogonal planes.

[0007] Optionally, there are two second columns, the two second columns are arranged along the first direction, and the second columns are arranged in one-to-one correspondence with the first column;

[0008] And / or, there are two second rows, the two second rows are arranged along the second direction, and the second rows are arranged in one-to-one correspondence with the first row.

[0009] Optionally, the first feed network includes:

[0010] A first input part for connecting to the first port, the first input part is connected between the two second rows, and the first input part is connected to multiple radiator columns in the two second rows;

[0011] Multiple first connection parts, and the multiple first connection parts are correspondingly connected between the radiators in the first row and the radiators in the second row;

[0012] Wherein, the impedance of the first input part between the first port and the second column is less than the impedance of the first input part between the first port and the first column, and there is unequal amplitude feeding between the first column and the second column to realize low sidelobe in the first direction;

[0013] The impedance of the first connection part between the radiator in the second row and the radiator in the first row is greater than the impedance of the first input part between the first port and the radiator in the second row, and there is unequal amplitude feeding between the first row and the second row to realize low sidelobe in the second direction.

[0014] Optionally, the first input part includes a first part and a second part, the first part is connected between one of the two second rows and the first port, and the second part is connected between the other of the two second rows and the first port;

[0015] Wherein the phase of the electrical signal input by the first port to the first part is opposite to the phase of the electrical signal input by the first port to the second part.

[0016] Optionally, the array antenna further includes:

[0017] A second feeding network for connecting to a second port, the second feeding network being connected to a plurality of radiators, and a conduction direction of an electrical signal input by the second feeding network to the radiators intersecting a conduction direction of an electrical signal input by the first feeding network to the radiators. An amplitude of the electrical signal input by the second feeding network to the plurality of radiators in the second row is greater than an amplitude of the electrical signal input by the first feeding network to the plurality of radiators in the first row, and an amplitude of the electrical signal input by the second feeding network to the plurality of radiators in the second column is greater than an amplitude of the electrical signal input by the second feeding network to the plurality of radiators in the first column.

[0018] Optionally, the second feeding network includes:

[0019] A second input part for connecting to the second port, the second input part being connected between two of the second columns, and the second input part being connected to a plurality of radiator rows in both of the second columns;

[0020] A plurality of second connection parts, the plurality of second connection parts being respectively connected between the radiators in the first column and the radiators in the second column;

[0021] Wherein, an impedance of the second input part between the second port and the second row is less than an impedance of the second input part between the second port and the first row, and there is unequal amplitude feeding between the first row and the second row to achieve a low sidelobe in the second direction;

[0022] An impedance of the second connection part between the radiators in the second column and the radiators in the first column is greater than an impedance of the second input part between the second port and the radiators in the second column, and there is unequal amplitude feeding between the first column and the second column to achieve a low sidelobe in the first direction.

[0023] Optionally, the second input part includes a third part and a fourth part, the third part being connected between one of the two second columns and the second port, and the fourth part being connected between the other of the two second columns and the second port;

[0024] Wherein, a phase of an electrical signal input by the second port to the third part is opposite to a phase of an electrical signal input by the second port to the fourth part.

[0025] Optionally, the dielectric substrate has a first surface and a second surface that are parallel to each other and arranged at intervals in a third direction, and the radiator is disposed on either the first surface or the second surface;

[0026] Among them, the first input part is arranged on the first surface, the second input part is arranged on the second surface, the first input part includes a first adjustment branch, the first adjustment branch is arranged in a stacked manner with part of the second input part, the second input part includes a second adjustment branch, and the second adjustment branch is arranged in a stacked manner with part of the first input part.

[0027] Optionally, the path length of the electrical signal in the first feed network transmitted in the first connection part is half of the wavelength of the electrical signal in the first feed network, and the path length of the electrical signal in the first input part conducted to the first connection part in the radiator of the second row is half of the wavelength of the electrical signal in the first feed network;

[0028] And / or, the path length of the electrical signal in the second feed network transmitted in the second connection part is half of the wavelength of the electrical signal in the second feed network, and the path length of the electrical signal in the second input part conducted to the second connection part in the radiator of the second column is half of the wavelength of the electrical signal in the second feed network.

[0029] Optionally, the first connection part is directly connected to the radiator in the first row, and the first connection part is coupled to the radiator in the second row;

[0030] And / or, the second connection part is directly connected to the radiator in the first column, and the first connection part is coupled to the radiator in the second column.

[0031] In a second aspect, an embodiment of the present application further provides a communication device.

[0032] The communication device provided by the embodiment of the present application includes the array antenna described in any of the above embodiments.

[0033] It can be understood that the beneficial effects of the above second aspect can refer to the relevant descriptions in the above first aspect, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 Structural schematic of the array antenna provided by the embodiment of the present application Figure 1 ;

[0036] Figure 2Schematic diagram of radiator rows and radiator columns of the array antenna provided by an embodiment of the present application;

[0037] Figure 3 Structural schematic of the array antenna provided by an embodiment of the present application Figure 2 ;

[0038] Figure 4 Schematic diagram of the first surface of the array antenna provided by an embodiment of the present application;

[0039] Figure 5 Schematic diagram of the second surface of the array antenna provided by an embodiment of the present application;

[0040] Figure 6 Radiation pattern of the array antenna provided by an embodiment of the present application;

[0041] Figure 7 S-parameter schematic diagram of the array antenna provided by an embodiment of the present application.

[0042] Among them, each reference numeral in the figure:

[0043] 100, array antenna;

[0044] 10, dielectric substrate; 11, first surface; 12, second surface;

[0045] 20, radiator; 21, radiator column; 211, first column; 212, second column; 22, radiator row; 221, first row; 222, second row;

[0046] 30, first feed network; 31, first input part; 311, first part; 312, second part; 32, first connection part; 33, first adjustment stub; 34, first port; 341, first input terminal; 342, second input terminal;

[0047] 40, second feed network; 41, second input part; 411, third part; 412, fourth part; 42, second connection part; 43, second adjustment stub; 44, second port; 441, third input terminal; 442, fourth input terminal;

[0048] 50, reflector. Detailed implementation manners

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, 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 are not used to limit the present application.

[0050] 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.

[0051] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0052] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0053] Please refer to Figure 1 and Figure 2 , and now the array antenna 100 provided by the embodiment of the present application will be described.

[0054] It should be noted that the first direction in the following text is the x direction shown in each figure, the second direction in the following text is the y direction shown in each figure, and the third direction in the following text is the z direction shown in each figure.

[0055] The array antenna 100 provided by the present application includes a dielectric substrate 10, a plurality of radiators 20, and a first feeder network 30.

[0056] In some embodiments, the material of the dielectric substrate 10 may include one or more materials with a relatively low dielectric constant, such as FR4 (epoxy resin-based fiberglass composite material), RO4003C (glass cloth-reinforced, ceramic-filled hydrocarbon material), etc.

[0057] The radiators 20 are disposed on the dielectric substrate 10. A plurality of radiators 20 are arranged to form a plurality of rows of radiators 22 extending along the first direction x, and a plurality of radiators 20 are arranged to form a plurality of columns of radiators 21 extending along the second direction y. The first direction x is orthogonal to the second direction y.

[0058] As Figure 1 shown, the surface of the dielectric substrate 10 is along Figure 1extends in the xOy plane shown, and a plurality of radiators 20 are all arranged on the surface of the dielectric substrate 10. The radiators 20 are arranged in a rectangular array, that is, a plurality of radiators 20 are arranged in the first direction x to form a row of radiators 22, and a plurality of radiators 20 are also arranged in the second direction y to form a column of radiators 21.

[0059] As Figure 1 and Figure 2 shown, a plurality of columns of radiators 21 are arranged in parallel in the first direction x, and a plurality of radiators 20 in each column of radiators 21 are arranged in the second direction y. The first feed network 30 is connected to a plurality of radiators 20 in each column of radiators 21, so as to input an electrical signal from the second direction y to the plurality of radiators 20 through the first feed network 30.

[0060] Two first columns 211 are arranged at intervals in the first direction x, and the second column 212 is arranged between the two first columns 211. That is, among the plurality of columns of radiators 21 arranged at intervals in the first direction x, one of the two first columns 211 is located at one end in the first direction x of the plurality of columns of radiators 21 arranged at intervals in the first direction x, and the other of the two first columns 211 is located at the other end in the first direction x of the plurality of columns of radiators 21 arranged at intervals in the first direction x.

[0061] The first feed network 30 is electrically connected to a plurality of radiators 20. The plurality of columns of radiators 21 includes two first columns 211 arranged in the first direction x and a second column 212 arranged between the two first columns 211 in the first direction x. The amplitude of the electrical signal input by the first feed network 30 to the plurality of radiators 20 in the second column 212 is greater than the amplitude of the electrical signal input by the first feed network 30 to the plurality of radiators 20 in the first column 211, and the amplitude of the electrical signal input by the first feed network 30 to the plurality of radiators 20 in the second row 222 is greater than the amplitude of the electrical signal input by the first feed network 30 to the plurality of radiators 20 in the first row 221.

[0062] The first feed network 30 is connected to the first port 34. The first feed network 30 is connected to a plurality of columns of radiators 21. The amplitude of the electrical signal input by the first feed network 30 to the first column 211 is small, and the amplitude of the electrical signal input by the first feed network 30 to the second column 212 is large. Thus, the radiation intensity of the beam generated by exciting the second column 212 is greater than the radiation intensity of the beam generated by the first column 211, thereby reducing the sidelobe intensity of the beam generated by the plurality of columns of radiators 21, and thus generating a low sidelobe radiation in the xOz plane shown through the plurality of radiators 20 under the excitation of the electrical signal in the first port 34. Figure 1 the low sidelobe radiation in the xOz plane shown in

[0063] The amplitude of the electrical signal input into the first row 221 by the first feeder network 30 is small, and the amplitude of the electrical signal input into the second row 222 by the first feeder network 30 is large, so that the radiation intensity of the beam generated by the multiple radiators 20 in the second row 222 is greater than the radiation intensity of the beam generated by the multiple radiators 20 in the first row 221, reducing the sidelobe intensity of the beam generated by the multiple radiator rows 22, so that under the excitation of the electrical signal in the first port 34, a low-sidelobe radiation in the yOz plane shown in Figure 1 is generated through the multiple radiators 20.

[0064] The beneficial effect of the array antenna 100 provided by the embodiment of the present application is that: compared with the prior art, the array antenna 100 provided by the embodiment of the present application can perform unequal-amplitude feeding on the multiple radiators 20 in the first row 221 and the multiple radiators 20 in the second row 222 through the first feeder network 30, and the first feeder network 30 performs unequal-amplitude feeding on the first column 211 and the second column 212, so that the beam generated by the multiple radiators 20 under the excitation of the electrical signal in the first port 34 has the effect of low-sidelobe radiation in the xOz plane where the first direction x is located, and the beam generated by the multiple radiators 20 under the excitation of the electrical signal in the first port 34 also has the effect of low-sidelobe radiation in the yOz plane where the second direction y is located, so that the array antenna provided by the embodiment of the present application has the advantage of realizing low-sidelobe radiation in two orthogonal planes.

[0065] Figure 6 It is the radiation pattern of the array antenna 100 provided by the embodiment of the present application in the xOz and yOz planes under the excitation of the electrical signal in the first port 34. In the working frequency band of 5.75 - 5.85 GHz, the sidelobe suppression ratio of the array antenna 100 provided by the embodiment of the present application in the xOz plane is greater than 33 dB, and the sidelobe suppression ratio in the yOz plane is greater than 26.5 dB.

[0066] In some embodiments provided by the present application, there are two second columns 212, the two second columns 212 are arranged along the first direction x, and the second column 212 is arranged in one-to-one correspondence with the first column 211;

[0067] and / or, there are two second rows 222, the two second rows 222 are arranged along the second direction y, and the second row 222 is arranged in one-to-one correspondence with the first row 221.

[0068] In some embodiments, as Figure 1 and Figure 2 shown, there are four radiator columns 21 and four radiator rows 22, that is, there are sixteen radiators 20, and the multiple radiators 20 form a sixteen-element array of four rows and four columns, so that the beam shape generated by the first feeder network 30 exciting the multiple radiators 20 is the same as the beam shape generated by the second feeder network 40 exciting the multiple radiators 20.

[0069] In some other embodiments (not shown in the figures), the second column 212 has two, and the second row 222 has one or more than three.

[0070] In some other embodiments (not shown in the figures), the second row 222 has two, and the second column 212 has one or more than three.

[0071] In some embodiments provided by the present application, the first feed network 30 includes:

[0072] A first input portion 31 for connecting to the first port 34. The first input portion 31 is connected between two second rows 222, and the first input portion 31 is connected to multiple radiator columns 21.

[0073] Multiple first connection portions 32, which are connected one by one between the radiators 20 in the first row 221 and the radiators 20 in the second row 222.

[0074] Wherein, the impedance of the first input portion 31 between the first port 34 and the second column 212 is less than the impedance of the first input portion 31 between the first port 34 and the first column 211.

[0075] As Figure 3 and Figure 4 shown, the first input portion 31 is connected to the first port 34 so that the electrical signal in the first port passes through the first input portion 31 and enters the first feed network 30. And the first input portion 31 is used to input the electrical signal in the first port 34 into the radiators 20 of the two second rows 222 from the second direction y. The first connection portion 32 is connected between the radiators 20 in the first row 221 and the radiators 20 in the second row 222, so that the electrical signal transmitted from the first port 34 to the radiators 20 of the second row 222 through the first input portion 31 is transmitted from the first connection portion 32 along the second direction y to the radiators 20 in the first row 221. Thus, the electrical signal in the first port 34 is conducted along the second direction y to all the radiators 20 through the first input portion 31 and the first connection portion 32.

[0076] The impedance of the path of the first input portion 31 between the first port 34 and the second column 212 is less than the impedance of the path of the first input portion 31 between the first port 34 and the first column 211, so as to realize the adjustment of the amplitudes of the electrical signals input into the first column 211 and the electrical signals input into the second column 212.

[0077] The first connection portion 32 is in the form of a serpentine series-feed coupling line, and the first connection portion 32 is coupled and connected to at least one of the radiators 20 in the first row 221 and the radiators 20 in the second row 222.

[0078] In some embodiments, as Figure 1As shown, the first connection part 32 is directly connected to the radiator 20 in the first row 221, and the first connection part 32 is coupled to the radiator 20 in the second row 222.

[0079] In some other embodiments (not shown in the figure), the first connection part 32 is coupled to the radiator 20 in the first row 221, and the first connection part 32 is directly connected to the radiator 20 in the second row 222.

[0080] In some other embodiments (not shown in the figure), the first connection part 32 is coupled to the radiator 20 in the first row 221, and the first connection part 32 is coupled to the radiator 20 in the second row 222.

[0081] Thus, the impedance between the first connection part 32 and the radiator 20 is greater than the impedance between the first input part 31 and the radiator, so that the impedance of the electrical signal input from the first port 34 into the second row 222 is less than the impedance of the electrical signal input from the first port 34 into the first row 221. Therefore, the electrical signal in the first port 34 performs unequal amplitude feeding on multiple radiators 20 in the second direction y through the first feed network 30, and under the excitation of the electrical signal in the first port 34, low sidelobe radiation in the yOz plane shown in Figure 1 is generated through multiple radiators 20.

[0082] In some embodiments provided by the embodiments of the present application, the coupling distance between the first connection part 32 and the radiator 20 between two radiators 20 in the first column 211 is greater than the coupling distance between the first connection part 32 and the radiator 20 between two radiators 20 in the second column 212, so that the impedance between the first connection part 32 and the radiator 20 between two radiators 20 in the first column 211 is greater than the impedance between the first connection part 32 and the radiator 20 between two radiators 20 in the second column 212.

[0083] In some embodiments, the impedance of the path of the first input part 31 between the first port 34 and the second column 212 is one-third of the impedance of the path of the first input part 31 between the first port 34 and the first column 211.

[0084] Thus, through the impedance adjustment of the electrical signals input from the first input part 31 to the first column 211 and the second column 212 respectively, the amplitude adjustment of the electrical signals input from the first input part 31 to the first column 211 and the second column 212 respectively is realized. While enabling the array antenna 100 provided by the present application to achieve low sidelobe radiation with y-polarization in the second direction, the utilization rate of the energy of the first port 34 can be improved, and the gain of the array antenna 100 provided by the present application can be enhanced.

[0085] In some embodiments provided by the present application, the first input part 31 includes a first part 311 and a second part 312. The first part 311 is connected between one of the two second rows 222 and the first port 34, and the second part 312 is connected between the other of the two second rows 222 and the first port 34;

[0086] wherein the phase of the electrical signal input by the first port 34 to the first part 311 is opposite to the phase of the electrical signal input by the first port 34 to the second part 312.

[0087] As Figure 4 shown, the first part 311 and the second part 312 are symmetrically arranged, and the axis of symmetry of the first part 311 and the second part 312 extends along the first direction x. The first part 311 is provided with a first input end 341, and the first input end 341 is electrically connected to the first port 34. The second part 312 is provided with a second input end 342, and the second input end 342 is electrically connected to the first port 34.

[0088] Thus, the phase of the electrical signal input by the first input end 341 to the first part 311 is opposite to the phase of the electrical signal input by the second input end 342 to the second part 312, enabling the multiple radiators 20 in each radiator row 21 to radiate in the same direction, thereby enhancing the gain of the array antenna 100 provided by the present application.

[0089] In some embodiments provided by the present application, the array antenna provided by the embodiments of the present application further includes a second feed network 40. The second feed network 40 is connected to the second port 44, and the second feed network 40 is electrically connected to the multiple radiators 20. Moreover, the conduction direction of the electrical signal input by the second feed network 40 to the radiators 20 intersects with the conduction direction of the electrical signal input by the first feed network 30 to the radiators 20. The multiple radiator rows 22 include two first rows 221 arranged along the first direction x and a second row 222 disposed between the two first rows 221 in the first direction x. The amplitude of the electrical signal input by the second feed network 40 to the multiple radiators 20 in the second row 222 is greater than the amplitude of the electrical signal input by the first feed network 30 to the multiple radiators 20 in the first row 221, and the amplitude of the electrical signal input by the second feed network 40 to the multiple radiators 20 in the second column 212 is greater than the amplitude of the electrical signal input by the second feed network 40 to the multiple radiators 20 in the first column 211.

[0090] The second feeding network 40 is connected to a plurality of radiator rows 22 to input the electrical signal of the second port 44 into the plurality of radiators 20. The amplitude of the electrical signal input by the second feeding network 40 into the first row 221 is small, and the amplitude of the electrical signal input by the second feeding network 40 into the second row 222 is large. The radiation intensity of the beam generated by exciting the second row 222 is greater than the radiation intensity of the beam generated by the first row 221, thereby reducing the sidelobe intensity of the beam generated by the plurality of radiator rows 22. Under the excitation of the electrical signal in the second port 44, low sidelobe radiation in the yOz plane shown in the figure is achieved through the plurality of radiators 20.

[0091] The amplitude of the electrical signal input by the second feeding network 40 into the first column 211 is small, and the amplitude of the electrical signal input by the second feeding network 40 into the second column 212 is large. The radiation intensity of the beam generated by exciting the second column 212 is greater than the radiation intensity of the beam generated by the first column 211, thereby reducing the sidelobe intensity of the beam generated by the plurality of radiator columns 21. Under the excitation of the electrical signal in the second port 44, low sidelobe radiation in the xOz plane shown in the figure is achieved through the plurality of radiators 20.

[0092] Thus, the array antenna 100 provided by the embodiment of the present application can perform unequal amplitude feeding on the plurality of radiators 20 in the first row 221 and the plurality of radiators 20 in the second row 222 through the second feeding network 40, and the second feeding network 40 performs unequal amplitude feeding on the first column 211 and the second column 212, so that the beam generated by the plurality of radiators 20 under the excitation of the electrical signal in the second port 44 has the effect of low sidelobe radiation in the xOz plane where the first direction x is located, and the beam generated by the plurality of radiators 20 under the excitation of the electrical signal in the second port 44 also has the effect of low sidelobe radiation in the yOz plane where the second direction y is located.

[0093] In addition, the current direction of the first feeding network 30 input into the radiator 20 intersects with the current direction of the second feeding network 40 input into the radiator 20, so as to respectively excite the radiator 20 to generate beams with different polarization directions through the first feeding network 30 and the second feeding network 40. On the one hand, the array antenna provided by the embodiment of the present application has the advantage of achieving low sidelobe radiation in both orthogonal planes, and on the other hand, the array antenna 100 provided by the embodiment of the present application has the advantage of co-aperture dual polarization.

[0094] In some embodiments, as Figures 1 to 5 shown, the first feeding network 30 is electrically connected to the ends of the plurality of radiators 20 in the second direction y, and the second feeding network 40 is electrically connected to the ends of the plurality of radiators 20 in the first direction x, so that the current input by the first feeding network 30 into the radiator 20 conducts along the second direction y, and the current input by the second feeding network 40 into the radiator 20 conducts along the first direction x.

[0095] The first feed network 30 is connected to one end of a plurality of radiators 20 in the second direction y, so that the electrical signal of the first port 34 excites the plurality of radiators 20 through the first feed network 30 to generate a beam polarized in the y direction. The second feed network 40 is connected to one end of the plurality of radiators 20 in the first direction x, so that the electrical signal of the second port 44 excites the plurality of radiators 20 through the second feed network 40 to generate a beam polarized in the x direction.

[0096] Thus, the isolation between the first port 34 and the second port 44 is improved by means of polarization isolation. As Figure 7 shown, the polarization isolation between the first port 34 and the second port 44 of the array antenna 100 provided by the present application is greater than 45 dB.

[0097] In some embodiments provided by the present application, the second feed network 40 includes:

[0098] A second input part 41 for connecting to the second port 44. The second input part 41 is connected between two second columns 212, and the second input part 41 is connected to all the radiator rows 22.

[0099] A plurality of second connection parts 42, which are respectively connected between the radiators 20 in the first column 211 and the radiators 20 in the second column 212;

[0100] Wherein, the impedance of the transmission line between the second port 44 and the second row 222 is less than the impedance of the transmission line between the second row 222 and the first row 221.

[0101] The second connection part 42 is in the form of a serpentine series-feed coupling line, and the second connection part 42 is coupled and connected to at least one of the radiators 20 in the first column 211 and the radiators 20 in the second column 212.

[0102] In some embodiments, as Figure 1 shown, the second connection part 42 is directly connected to the radiator 20 in the first column 211, and the second connection part 42 is coupled and connected to the radiator 20 in the second column 212.

[0103] In some other embodiments (not shown in the figure), the second connection part 42 is coupled and connected to the radiator 20 in the first column 211, and the second connection part 42 is directly connected to the radiator 20 in the second column 212.

[0104] In some other embodiments (not shown in the figure), the second connection part 42 is coupled and connected to the radiator 20 in the first column 211, and the second connection part 42 is coupled and connected to the radiator 20 in the second column 212.

[0105] Thus, the impedance between the second connection part 42 and the radiator 20 is greater than the impedance between the second input part 41 and the radiator, so that the impedance of the electrical signal input into the second column 212 from the second port 44 is less than the impedance of the electrical signal input into the first column 211 from the second port 44. Therefore, the electrical signal in the second port 44 performs unequal-amplitude feeding on the multiple radiators 20 in the first direction x through the second feed network 40, and under the excitation of the electrical signal in the second port 44, low side-lobe radiation in the xOz plane shown in Figure 1 is generated through the multiple radiators 20.

[0106] In some embodiments provided by the embodiments of the present application, the coupling distance between the second connection part 42 and the radiator 20 between the two radiators 20 in the first row 221 is greater than the coupling distance between the second connection part 42 and the radiator 20 between the two radiators 20 in the second row 222, so that the impedance between the second connection part 42 and the radiator 20 between the two radiators 20 in the first row 221 is greater than the impedance between the second connection part 42 and the radiator 20 between the two radiators 20 in the second row 222.

[0107] In some embodiments, the impedance of the path of the second input part 41 between the second port 44 and the second row 222 is one-third of the impedance of the path of the second input part 41 between the second port 44 and the first row 221.

[0108] Thus, through the impedance adjustment of the electrical signals input into the first row 221 and the second row 222 respectively by the second input part 41, the amplitude adjustment of the electrical signals input into the first row 221 and the second row 222 respectively by the second input part 41 is realized. While enabling the array antenna 100 provided by the present application to achieve low side-lobe radiation with x-polarization in the first direction, the utilization rate of the energy of the second port 44 can be improved, and the gain of the array antenna 100 provided by the present application can be improved.

[0109] In some embodiments provided by the present application, the second input part 41 includes a third part 411 and a fourth part 412. The third part 411 is connected between one of the two second columns 212 and the second port 34, and the fourth part 412 is connected between the other of the two second profits and the second port 44;

[0110] wherein, the phases of the electrical signals input into the third part 411 from the second port 44 and the electrical signals input into the fourth part 412 from the second port 44 are opposite.

[0111] Such as Figure 5As shown, the third part 411 and the fourth part 412 are symmetrically arranged, and the axis of symmetry of the third part 411 and the fourth part 412 extends along the second direction y. The third part 411 is provided with a third input end 441, and the third input end 441 is electrically connected to the second port 44. The fourth part 412 is provided with a fourth input end 442, and the fourth input end 442 is electrically connected to the second port 44.

[0112] Thus, the electrical signals input to the third part 411 through the third input end 441 and the electrical signals input to the fourth part 412 through the fourth input end 442 are opposite in phase, enabling multiple radiators 20 in each radiator row 22 to radiate in the same direction, thereby enhancing the gain of the array antenna 100 provided in this application.

[0113] In some embodiments provided in this application, the dielectric substrate 10 has a first surface 11 and a second surface 12 that are parallel to each other and spaced apart in the third direction z. The radiator 20 is provided on either the first surface 11 or the second surface 12. The first input portion 31 is provided on the first surface 11, and the second input portion 41 is provided on the second surface 12.

[0114] As Figure 4 shown, multiple radiators 20 are all provided on the first surface 11, the first input portion 31, the first connection portion 32, and the second connection portion 42 are all provided on the first surface 11, and the second input portion 41 is provided on the second surface 12. Thus, on the one hand, it avoids the mutual crossing of the first input portion 31 and the second input portion 41, reducing the wiring difficulty. On the other hand, when printing on the second surface 12, only the second input portion 41 needs to be printed, simplifying the processing procedure of the array antenna 100 provided in this application.

[0115] In addition, since the radiator, the first feed network, and the second feed network are all provided on the dielectric substrate, the radiator, the first feed network, and the second feed network can be integrated on the same PCB substrate, reducing the processing cost of the array antenna 100 provided in the embodiments of this application and reducing the occupied space of the array antenna 100 provided in the embodiments of this application.

[0116] In some embodiments provided in this application, as Figure 1 shown, the array antenna 100 provided in this application further includes a reflector 50. The reflector 50 extends along the Figure 1 xOy plane shown, so that the reflector 50 is parallel to the dielectric substrate 10. As shown, multiple radiators 20 are provided on the first surface 11 of the dielectric substrate 10, and the reflector 50 is located on the side of the dielectric substrate 10 where the second surface 12 faces away from the first surface 11.

[0117] The first input portion 31 includes a first adjustment stub 33, and the first adjustment stub 33 is stacked with a part of the second input portion 41. The second input portion 41 includes a second adjustment stub 43, and the second adjustment stub 43 is stacked with a part of the first input portion 31.

[0118] As shown in Figure 3 , Figure 4 and Figure 5 the first adjustment section 33 and a part of the third section 411 are arranged in a stacked manner along the third direction z, and the first adjustment section 33 and a part of the fourth section 412 are arranged in a stacked manner along the third direction z. The second adjustment section 43 and a part of the first section 311 are arranged in a stacked manner along the third direction z, and the second adjustment section 43 and a part of the second section 312 are arranged in a stacked manner along the third direction z.

[0119] Thus, by providing the first adjustment section 33, the impedance matching of the second input section 41 can be optimized, signal reflection in the second input section 41 can be reduced, and the signal transmission efficiency in the second input section 41 can be improved. By providing the second adjustment section 43, the impedance matching of the first input section 31 can be optimized, signal reflection in the first input section 31 can be reduced, and the signal transmission efficiency in the first input section 31 can be improved.

[0120] In some embodiments provided by the present application, the path length of the electrical signal in the first feed network 30 transmitted in the first connection portion 32 is half the wavelength of the electrical signal in the first feed network 30, and the path length of the electrical signal in the first input portion 31 conducted to the first connection portion 32 in the radiator 20 of the second row 222 is half the wavelength of the electrical signal in the first feed network 30.

[0121] As shown in Figure 3 and Figure 4 the first connection portion 32 is a serpentine series-fed coupling line, so that the path length of the electrical signal in the first input portion 31 conducted to the radiator 20 of the first row 221 is an integer multiple of the wavelength of the electrical signal in the first feed network 30, so that the radiator 20 of the first row 221 and the radiator 20 of the second row 222 achieve in-phase radiation.

[0122] That is, the sixteen-element radiator array provided in the embodiments of the present application radiates in the same direction under the excitation of the first port 34, and the sixteen-element radiator array provided in the embodiments of the present application radiates in the same direction under the excitation of the second port 34. As shown in Figure 6 the gain of the array antenna 100 provided by the present application is greater than 17.7 dBi.

[0123] The path length of the electrical signal in the second feed network 40 transmitted in the second connection portion 42 is half the wavelength of the electrical signal in the second feed network 40, and the path length of the electrical signal in the second input portion 41 conducted to the second connection portion 42 in the radiator 20 of the second column 212 is half the wavelength of the electrical signal in the second feed network 40.

[0124] As shown in Figure 3 and Figure 4As shown, the second connection part 42 is a serpentine series-fed coupling line, so that the path length of the electrical signal in the second input part 41 conducted to the radiator 20 in the first column 211 is an integer multiple of the wavelength of the electrical signal in the second feed network 40, so that the radiator 20 in the first column 211 and the radiator 20 in the second column 212 achieve in-phase radiation, that is, the sixteen-element radiator array provided in the embodiment of the present application radiates in the same direction under the excitation of the second port 44, so as to improve the gain of the array antenna 100 provided in the present application.

[0125] The communication device provided in the embodiment of the present application will be described below.

[0126] The communication device provided in the embodiment of the present application includes the array antenna 100 in any of the above embodiments.

[0127] It can be understood that the array antenna 100 provided in the present application has a radiation effect of common aperture, dual polarization, and low side lobes. The communication device provided in the present application adopts the array antenna 100 provided in the embodiment of the present application, so that the communication device provided in the present application has the advantages of high radiation directivity, large beam coverage range, small side lobe suppression, and small space occupied by the antenna.

[0128] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements 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 in that: include: dielectric substrate; A plurality of radiators, wherein the radiators are disposed on the dielectric substrate, the plurality of radiators are arranged to form a plurality of radiator columns extending along a first direction, the plurality of radiator columns include two first columns arranged along the first direction and a second column disposed between the two first columns in the first direction, and the plurality of radiators are arranged to form a plurality of radiator rows extending along a second direction, the plurality of radiator rows include two first rows arranged along the first direction and a second row disposed between the two first rows in the first direction, and the first direction is orthogonal to the second direction; A first feeding network is used to be connected to the first port, the first feeding network is connected to a plurality of radiators, the amplitude of the electrical signal input by the first feeding network to the plurality of radiators in the second column is greater than the amplitude of the electrical signal input by the first feeding network to the plurality of radiators in the first column, and the amplitude of the electrical signal input by the first feeding network to the plurality of radiators in the second row is greater than the amplitude of the electrical signal input by the first feeding network to the plurality of radiators in the first row.

2. The array antenna according to claim 1, wherein: There are two second columns, the two second columns are arranged along the first direction, and the second columns are arranged in one-to-one correspondence with the first columns; And / or, there are two second rows, the two second rows are arranged along the second direction, and the second rows are arranged in a one-to-one correspondence with the first rows.

3. The array antenna according to claim 2, characterized in that: The first feed network comprises: a first input portion, used to be connected to the first port, the first input portion being connected between two of the second rows, and the first input portion being connected to a plurality of the radiator columns in the two second rows; A plurality of first connection portions, wherein the plurality of first connection portions are connected between the radiators in the first row and the radiators in the second row in a one-to-one correspondence; The impedance of the first input part between the first port and the second column is smaller than the impedance of the first input part between the first port and the first column, and the first column and the second column are fed with unequal amplitudes to achieve low side lobes in the first direction; The impedance of the first connecting portion between the radiator in the second row and the radiator in the first row is greater than the impedance of the first input portion between the first port and the radiator in the second row, and there is unequal amplitude feeding between the first row and the second row, thereby achieving low side lobes in the second direction.

4. The array antenna according to claim 3, characterized in that: The first input section includes a first section and a second section, the first section is connected between one of the two second rows and the first port, and the second section is connected between the other of the two second rows and the first port; The phase of the electrical signal input to the first part by the first port is opposite to the phase of the electrical signal input to the second part by the first port.

5. The array antenna according to claim 3, characterized in that: The array antenna also includes: a second feeding network, used to be connected to the second port, the second feeding network is connected to a plurality of radiators, and a conduction direction of an electrical signal input by the second feeding network to the radiators intersects with a conduction direction of an electrical signal input by the first feeding network to the radiators, an amplitude of an electrical signal input by the second feeding network to the plurality of radiators in the second row is greater than an amplitude of an electrical signal input by the first feeding network to the plurality of radiators in the first row, and an amplitude of an electrical signal input by the second feeding network to the plurality of radiators in the second column is greater than an amplitude of an electrical signal input by the second feeding network to the plurality of radiators in the first column.

6. The array antenna according to claim 5, characterized in that: The second feed network comprises: a second input portion, used to be connected to the second port, the second input portion being connected between two of the second columns, and the second input portion being connected to a plurality of the radiator rows in the two second columns; A plurality of second connection parts, wherein the plurality of second connection parts are connected between the radiators in the first column and the radiators in the second column in a one-to-one correspondence; The impedance of the second input part between the second port and the second row is less than the impedance of the second input part between the second port and the first row, and there is unequal amplitude feeding between the first row and the second row, so as to achieve low side lobes in the second direction; The impedance of the second connecting portion between the radiator in the second column and the radiator in the first column is greater than the impedance of the second input portion between the second port and the radiator in the second column, and there is unequal amplitude feeding between the first column and the second column to achieve low side lobes in the first direction.

7. The array antenna according to claim 6, characterized in that: The second input section includes a third section and a fourth section, the third section is connected between one of the two second columns and the second port, and the fourth section is connected between the other of the two second columns and the second port; The phase of the electrical signal input to the third part by the second port is opposite to the phase of the electrical signal input to the fourth part by the second port.

8. The array antenna according to claim 6, characterized in that: The dielectric substrate has a first surface and a second surface which are parallel to each other and spaced apart in the third direction, and the radiator is arranged on any one of the first surface and the second surface; Among them, the first input part is arranged on the first surface, the second input part is arranged on the second surface, the first input part includes a first adjustment branch, the first adjustment branch and a part of the second input part are stacked, and the second input part includes a second adjustment branch, and the second adjustment branch and a part of the first input part are stacked.

9. The array antenna according to claim 6, characterized in that: The path length of the electrical signal in the first feeding network transmitted in the first connecting portion is half the wavelength of the electrical signal in the first feeding network, and the path length of the electrical signal in the first input portion transmitted in the radiator in the second row to the first connecting portion is half the wavelength of the electrical signal in the first feeding network; And / or, the path length of the electrical signal in the second feeding network transmitted in the second connecting part is half the wavelength of the electrical signal in the second feeding network, and the path length of the electrical signal in the second input part transmitted in the radiator of the second column to the second connecting part is half the wavelength of the electrical signal in the second feeding network.

10. The array antenna according to claim 6, characterized in that: The first connection portion is directly connected to the radiators in the first row, and the first connection portion is coupled to the radiators in the second row; And / or, the second connection portion is directly connected to the radiators in the first column, and the first connection portion is coupled to the radiators in the second column.

11. A communication device, characterized in that: Comprising the array antenna as described in any one of claims 1-10.

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