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 feed network, the radiators are arranged on the dielectric substrate, the plurality of radiators comprise at least one inner-layer radiator, a plurality of middle-layer radiators and a plurality of outer-layer radiators, the plurality of middle-layer radiators are arranged in an annular array around the inner-layer radiator, and the feed network is arranged on the dielectric substrate. The plurality of outer-layer radiators are arranged around the plurality of middle-layer radiators in an annular array; the feed network is used for being connected with a signal source, the inner-layer radiator, the middle-layer radiator and the outer-layer radiator are all connected with the feed network, and the impedance of the feed network between the inner-layer radiator and the signal source is smaller than that of the feed network between the middle-layer radiator and the signal source. And the impedance of the feed network between the middle-layer radiator and the signal source is smaller than that of the feed network between the outer-layer radiator and the signal source. The array antenna provided by the invention has the advantage of relatively high antenna gain while having the characteristic of low side lobe.

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] A low sidelobe antenna refers to an antenna in which the levels of other lobes (i.e., sidelobes) except the main lobe in the antenna pattern are relatively low. It is commonly used in communication systems to achieve directional transmission and reception of communication signals and improve anti-interference performance. A low sidelobe antenna usually has good directivity, can concentrate energy in a specific direction, and due to the concentrated energy, a low sidelobe antenna usually has a high gain. However, the low sidelobe antennas in related technologies have the problem of low antenna gain. 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 of low antenna gain existing in the low sidelobe antennas in the prior art.

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

[0005] The array antenna provided by the embodiments of this application includes a dielectric substrate; a plurality of radiators, the radiators are arranged on the dielectric substrate, the plurality of radiators include at least one inner-layer radiator, a plurality of middle-layer radiators and a plurality of outer-layer radiators, the plurality of middle-layer radiators are arranged in a circular array around the inner-layer radiator, and the plurality of outer-layer radiators are arranged in a circular array around the plurality of middle-layer radiators; a feeding network for connecting to a signal source, the inner-layer radiator, the middle-layer radiators and the outer-layer radiators are all connected to the feeding network, the impedance of the feeding network between the inner-layer radiator and the signal source is less than the impedance of the feeding network between the middle-layer radiator and the signal source, and the impedance of the feeding network between the middle-layer radiator and the signal source is less than the impedance of the feeding network between the outer-layer radiator and the signal source.

[0006] The beneficial effect of the array antenna provided by the embodiments of this application is that: compared with the prior art, the array antenna provided by the embodiments of this application makes the feeding network input electrical signals with different amplitudes to the radiators at different distances from the center position of the radiator array through different impedances between the feeding network and the radiators, so as to excite the plurality of radiators to generate beams with different intensities, that is, the closer the radiator is to the middle of the radiator array, the greater the intensity of the generated beam, thereby realizing the suppression of the sidelobe level. On the one hand, the array antenna provided by this application has the radiation characteristic of low sidelobes. On the other hand, the input impedance of each radiator is adjusted through the impedance arrangement of the feeding network, and the energy loss during sidelobe suppression is reduced, thereby improving the gain of the array antenna provided by the embodiments of this application.

[0007] Optionally, the radiator array includes a plurality of radiation units, which are arranged in a circular array. The radiation unit includes an inner-layer radiator, a first middle-layer radiator, a second middle-layer radiator, and an outer-layer radiator. The feeding network includes a plurality of feeding units, and the feeding units correspond to the radiation units one by one;

[0008] Among them, the impedance of the electrical signal of the signal source input into the inner-layer radiator through the feeding unit is 0.3 to 0.35 times the impedance of the electrical signal input into the middle-layer radiator through the feeding unit, and the impedance of the electrical signal input into the middle-layer radiator through the feeding unit is 0.3 to 0.35 times the impedance of the electrical signal input into the outer-layer radiator through the feeding unit.

[0009] Optionally, the feeding unit includes:

[0010] A first connection part for electrically connecting with the signal source;

[0011] A first input part connected between the first connection part and the inner-layer radiator, and the first input part has a first impedance;

[0012] A second input part connected between the first connection part and the first middle-layer radiator, and the second input part has a second impedance;

[0013] A second connection part connected to the first connection part, and the second connection part has the second impedance;

[0014] A third input part is electrically connected to the first connection part through the second connection part, and the third input part is connected to the second middle-layer radiator, and the third input part has a third impedance;

[0015] A fourth input part is electrically connected to the first connection part through the second connection part, and the fourth input part is connected to the outer-layer radiator, and the fourth input part has a fourth impedance;

[0016] Among them, the first impedance is 0.3 to 0.35 times the second impedance, and the third impedance is 0.3 to 0.35 times the fourth impedance.

[0017] Optionally, the width dimension of the first input part can be 0.27 to 0.33 times the width dimension of the second input part, and the width dimension of the first input part can be 0.27 to 0.33 times the width dimension of the second connection part, and the width dimension of the third input part can be 0.27 to 0.33 times the width dimension of the fourth input part.

[0018] Optionally, the inner radiators in each of the radiation units are arranged along a first direction with the first middle radiators in the corresponding radiation units, and the inner radiators in each of the radiation units are arranged along a second direction with the second middle radiators in the corresponding radiation units, the first direction being orthogonal to the second direction;

[0019] The outer radiators in each of the radiation units are arranged along the second direction with the first middle radiators in the corresponding radiation units, and the outer radiators in each of the radiation units are arranged along the first direction with the second middle radiators in the corresponding radiation units.

[0020] Optionally, the difference between the path length of the electrical signal conducted in the first input part and the path length of the electrical signal conducted in the second input part is an odd multiple of half the wavelength of the electrical signal, and the difference between the path length of the electrical signal conducted in the fourth input part and the path length of the electrical signal conducted in the third input part is an odd multiple of half the wavelength of the electrical signal;

[0021] And / or, the path length of the electrical signal conducted within the second connection part is an integer multiple of the wavelength of the electrical signal.

[0022] Optionally, the plurality of feeding units include a first unit, a second unit, a third unit, and a fourth unit. The first unit and the second unit are symmetrically arranged with respect to the first direction, the third unit and the fourth unit are symmetrically arranged with respect to the first direction, and the first unit and the third unit are symmetrically arranged with respect to the second direction;

[0023] The feeding network further includes a fifth connection part connected to the signal source. The electrical signal input to the first unit by the fifth connection part and the electrical signal input to the second unit by the fifth connection part have opposite phases, the electrical signal input to the first unit by the fifth connection part and the electrical signal input to the third unit by the fifth connection part have the same phase, and the electrical signal input to the second unit by the fifth connection part and the electrical signal input to the fourth unit by the fifth connection part have the same phase.

[0024] Optionally, the fifth connection part is provided with a feeding port for connecting to a signal source, and the difference between the path length of the electrical signal conducted from the feeding port to one end of the fifth connection part and the path length of the electrical signal conducted from the feeding port to the other end of the fifth connection part is an odd multiple of half the wavelength of the electrical signal;

[0025] The first input part of the first unit and the first input part of the third unit are both connected to one end of the fifth connection part in the first direction, and the first input part of the second unit and the first input part of the fourth unit are both connected to the other end of the fifth connection part in the first direction.

[0026] Optionally, there are multiple feeding networks, and the multiple feeding networks include a first feeding network and a second feeding network. The first feeding network is connected to the ends of the multiple radiators in the first direction, and the second feeding network is connected to the ends of the multiple radiators in the second direction.

[0027] In a second aspect, an embodiment of the present application further provides a communication device.

[0028] The communication device provided by the present application includes the array antenna described in any of the above embodiments.

[0029] It can be understood that the beneficial effects of the second aspect above can refer to the relevant descriptions in the first aspect above, and will not be elaborated here. Description of the Drawings

[0030] 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 drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 Structural schematic diagram of the array antenna provided by the embodiment of the present application Figure 1 ;

[0032] Figure 2 Structural schematic diagram of the array antenna provided by the embodiment of the present application Figure 2 ;

[0033] Figure 3 Schematic diagram of the first feeding network of the array antenna provided by the embodiment of the present application;

[0034] Figure 4 Schematic diagram of the radiation unit and the feeding unit of the array antenna provided by the embodiment of the present application;

[0035] Figure 5 Schematic diagram of the second feeding network of the array antenna provided by the embodiment of the present application;

[0036] Figure 6 For Figure 1 Partial enlarged schematic diagram at position A in

[0037] Figure 7Schematic diagram of the radiator shape of the array antenna provided by the embodiment of the present application.

[0038] Among them, each reference numeral in the figure:

[0039] 100, array antenna;

[0040] 10, dielectric substrate; 11, first surface; 12, second surface;

[0041] 20, radiator; 21, inner-layer radiator; 22, middle-layer radiator; 221, first middle-layer radiator; 222, second middle-layer radiator; 23, outer-layer radiator; 201, radiation unit;

[0042] 30, feeding network; 301, first feeding network; 302, second feeding network; 31, first unit; 32, second unit; 33, third unit; 34, fourth unit; 35, fifth connection part; 351, feeding port; 36, break; 37, cross-line part; 311, first connection part; 312, first input part; 313, second input part; 314, second connection part; 315, third input part; 316, fourth input part;

[0043] 40, reflector. Detailed implementation manners

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the 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.

[0045] 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.

[0046] 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, and 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 cannot be understood as a limitation to the present application.

[0047] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0048] Please refer to Figure 1 and Figure 2 together, and now an explanation will be given to the array antenna 100 provided by the embodiments of this application.

[0049] It should be noted that the first direction in the following text is the x direction shown in the figure, the second direction in the following text is the y direction shown in the figure, and the third direction in the following text is the z direction shown in the figure.

[0050] The array antenna 100 provided by the embodiments of this application includes a dielectric substrate 10, a plurality of radiators 20, and a feeding network 30.

[0051] 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.

[0052] The radiators 20 are disposed on the dielectric substrate 10. The plurality of radiators 20 include at least one inner-layer radiator 21, a plurality of middle-layer radiators 22, and a plurality of outer-layer radiators 23. The plurality of middle-layer radiators 22 are arranged in a circular array around the inner-layer radiator 21, and the plurality of outer-layer radiators 23 are arranged in a circular array around the plurality of middle-layer radiators 22.

[0053] In some embodiments, as Figure 7 shown, the radiator 20 can be a rectangular patch, a polygonal patch, or other metal structures that can generate a beam under the excitation of an electrical signal.

[0054] In some embodiments, as Figure 1 shown, the dielectric substrate 10 extends along the Figure 1 xOy plane shown in the figure. The plurality of radiators 20 are located on the surface of the dielectric substrate 10 on the same side in the third direction z, or part of the radiators 20 are located on the surface of the dielectric substrate 10 on one side in the third direction z, and the other part of the radiators 20 are located on the surface of the dielectric substrate 10 on the other side in the third direction z.

[0055] In some embodiments (not shown in the figure), there is one inner-layer radiator 21, and the orthographic projection of the inner-layer radiator 21 in the third direction z is located inside the orthographic projection of the plurality of middle-layer radiators 22 in the third direction z.

[0056] In some other embodiments, as Figure 1 shown, there are multiple inner radiators 21, and the multiple inner radiators 21 are arranged in a circular array on the surface of the dielectric substrate 10. The positive projections of the multiple inner radiators 21 in the third direction z are all located inside the positive projections of the multiple middle radiators 22 in the third direction z.

[0057] As Figure 1 shown, the multiple middle radiators 22 are arranged in a circular array along the outer side of the inner radiators 21, and the multiple outer radiators 23 are arranged in a circular array along the outer peripheral side of the circular array formed by the multiple middle radiators 22.

[0058] The feeding network 30 is used to be connected to a signal source. The inner radiators 21, the middle radiators 22, and the outer radiators 23 are all connected to the feeding network 30. The impedance of the feeding network 30 between the inner radiator 21 and the signal source is less than the impedance of the feeding network 30 between the middle radiator 22 and the signal source, and the impedance of the feeding network 30 between the middle radiator 22 and the signal source is less than the impedance of the feeding network 30 between the outer radiator 23 and the signal source.

[0059] As Figure 1 shown, the feeding network 30 is arranged on the surface of the dielectric substrate 10, and the multiple radiators 20 are all connected to the feeding network 30. In some embodiments, the radiator 20 and the feeding network 30 are connected by one or more of connection methods such as direct connection, close-coupling connection, and slot-coupling connection.

[0060] The feeding network 30 is connected between the signal source and the radiator 20 so that an electrical signal can be input into the multiple radiators 20 along the feeding network 30. The electrical signal has an impedance during transmission in the feeding network 30. The higher the impedance of the electrical signal input into the radiator 20 along the feeding network 30, the greater the impedance ratio of the feeding network 30 leading to different radiators 20, and thus the smaller the amplitude of the electrical signal input into the radiator 20 by the feeding network 30.

[0061] The impedance of the feeding network 30 between the inner radiator 21 and the signal source, the impedance of the feeding network 30 between the middle radiator 22 and the signal source, and the impedance of the feeding network 30 between the outer radiator 23 and the signal source increase in sequence, so that the amplitude of the electrical signal input from the signal source to the inner radiator 21, the amplitude of the electrical signal input from the signal source to the middle radiator 22, and the amplitude of the electrical signal input from the signal source to the outer radiator 23 decrease in sequence, and further the intensity of the beam generated by the inner radiator 21, the intensity of the beam generated by the middle radiator 22, and the intensity of the beam generated by the outer radiator 23 decrease in sequence.

[0062] When the array antenna 100 provided in the embodiment of the present application radiates, reducing the radiation intensity of the outer radiator 23 can effectively reduce the sidelobe level, thereby improving the overall performance of the antenna.

[0063] The beneficial effects of the array antenna 100 provided by the embodiments of the present application are as follows: Compared with the prior art, in the array antenna 100 provided by the embodiments of the present application, due to the different impedances between the feeding network 30 and the radiators 20, the feeding network 30 inputs electrical signals with different amplitudes to the radiators 20 at different distances from the center position of the radiator 20 array, so as to excite multiple radiators 20 to generate beams with different intensities, that is, the beams generated by the radiators 20 closer to the middle of the radiator 20 array have greater intensities, thereby realizing the suppression of the sidelobe level. On the one hand, the array antenna 100 provided by the present application has the radiation characteristic of low sidelobes. On the other hand, by adjusting the impedance arrangement of the feeding network 30, the input impedance of each radiator 20 is adjusted, and the energy loss during sidelobe suppression is reduced, thereby improving the gain of the array antenna 100 provided by the embodiments of the present application.

[0064] In addition, multiple middle-layer radiators 22 are arranged in a circular pattern, and multiple outer-layer radiators 23 are arranged in a circular pattern, thereby reducing the sidelobes of the array antenna 100 provided by the embodiments of the present application in multiple horizontal directions.

[0065] In some embodiments provided by the present application, the array antenna 100 further includes a reflector 40, and the reflector 40 extends along the Figure 1 xOy plane shown in, so that the reflector 40 is parallel to the dielectric substrate 10, as Figure 2 shown, multiple radiators 20 are arranged on the surface of the dielectric substrate 10 on one side in the third direction z, and the reflector 40 is located on the other side of the dielectric substrate 10 in the third direction z.

[0066] In some embodiments provided by the present application, the radiator 20 array includes multiple radiation units 201, and the multiple radiation units 201 are arranged in a circular array on the dielectric substrate 10. The radiation unit 201 includes an inner-layer radiator 21, a first middle-layer radiator 221, a second middle-layer radiator 222 and an outer-layer radiator 23. The feeding network 30 includes multiple feeding units, and the feeding units correspond to the radiation units 201 one by one;

[0067] As Figure 3 and Figure 4 shown, each feeding unit is electrically connected to multiple radiators 20 in the corresponding radiation unit 201, and multiple radiation units 201 are all electrically connected to the signal source, so as to transmit the electrical signal in the signal source to multiple radiators 20 through the multiple radiation units 201.

[0068] In some embodiments provided by the present application, the impedance of the electrical signal input into the inner radiator 21 through the feeding unit is 0.3 to 0.35 times the impedance of the electrical signal input into the middle radiator 22 through the feeding unit, and the impedance of the electrical signal input into the middle radiator 22 through the feeding unit is 0.3 to 0.35 times the impedance of the electrical signal input into the outer radiator 23 through the feeding unit.

[0069] Thus, the radiation intensity of the outer radiator 23 is close to one-third of the radiation intensity of the middle radiator 22, and the radiation intensity of the middle radiator 22 is close to one-third of the radiation intensity of the inner radiator 21.

[0070] In some embodiments, the impedances of the electrical signals input into multiple inner radiators 21 through the feeding unit are the same, the impedances of the electrical signals input into multiple middle radiators 22 through the feeding unit are the same, and the impedances of the electrical signals input into multiple outer radiators 23 through the feeding unit are the same.

[0071] Thus, the intensity of the beam generated by the array antenna 100 provided by the present application is symmetrically distributed about the third direction z in any plane orthogonal to the third direction z.

[0072] In some embodiments provided by the present application, the feeding unit includes:

[0073] A first connection portion 311 for electrically connecting to a signal source;

[0074] A first input portion 312 connected between the first connection portion 311 and the inner radiator 21, and the first input portion 312 has a first impedance;

[0075] A second input portion 313 connected between the first connection portion 311 and the first middle radiator 221, and the second input portion 313 has a second impedance;

[0076] A second connection portion 314 connected to the first connection portion 311, and the second connection portion 314 has a second impedance;

[0077] A third input portion 315 electrically connected to the first connection portion 311 through the second connection portion 314, and the third input portion 315 is connected to the second middle radiator 222, and the third input portion 315 has a third impedance;

[0078] A fourth input portion 316 electrically connected to the first connection portion 311 through the second connection portion 314, and the fourth input portion 316 is connected to the outer radiator 23, and the fourth input portion 316 has a fourth impedance;

[0079] Wherein, the first impedance is 0.3 to 0.35 times the second impedance, and the third impedance is 0.3 to 0.35 times the fourth impedance.

[0080] In some embodiments provided by the present application, as Figure 4 shown, the first connection part 311, the second connection part 314, the first input part 312, the second input part 313, the third input part 315 and the fourth input part 316 are all microstrip lines printed on the surface of the dielectric substrate 10, and the thickness dimensions of the first connection part 311, the second connection part 314, the first input part 312, the second input part 313, the third input part 315 and the fourth input part 316 in the third direction z are the same. The width dimension of the first input part 312 is about three times the width dimension of the second input part 313, and the width dimension of the first input part 312 is about three times the width dimension of the second connection part 314, so that the first impedance of the first input part 312 is about one-third of the second impedance of the second input part 313 or the second connection part 314. The width dimension of the third input part 315 is about three times the width dimension of the fourth input part 316, so that the third impedance of the third input part 315 is about one-third of the fourth impedance of the fourth input part 316.

[0081] In some other embodiments provided by the present application (not shown in the figure), the thickness of the dielectric substrate 10 is the same at any point in the first direction x and the second direction y. The width dimensions of the first connection part 311, the second connection part 314, the first input part 312, the second input part 313, the third input part 315 and the fourth input part 316 are the same. The thickness dimension of the first input part 312 is about three times the thickness dimension of the second input part 313, and the thickness dimension of the first input part 312 is about three times the thickness dimension of the second connection part 314, so that the first impedance of the first input part 312 is about one-third of the second impedance of the second input part 313 or the second connection part 314. The thickness dimension of the third input part 315 is about three times the thickness dimension of the fourth input part 316, so that the third impedance of the third input part 315 is about one-third of the fourth impedance of the fourth input part 316.

[0082] In some other embodiments provided by the present application (not shown in the figures), the width dimensions of the first connecting portion 311, the second connecting portion 314, the first input portion 312, the second input portion 313, the third input portion 315, and the fourth input portion 316 are all the same, and the thickness dimensions of the first connecting portion 311, the second connecting portion 314, the first input portion 312, the second input portion 313, the third input portion 315, and the fourth input portion 316 are all the same. The thickness dimension of the dielectric substrate 10 on one side of the first input portion 312 in the third direction z is about one-third times the thickness dimension of the dielectric substrate 10 on one side of the second input portion 313 in the third direction z. The thickness dimension of the dielectric substrate 10 on one side of the first input portion 312 in the third direction z is about one-third times the thickness dimension of the dielectric substrate 10 on one side of the second connecting portion 314 in the third direction z, so that the first impedance of the first input portion 312 is about one-third times the second impedance of the second input portion 313 or the second connecting portion 314. The thickness dimension of the dielectric substrate 10 on one side of the third input portion 315 in the third direction z is about one-third times the thickness dimension of the dielectric substrate 10 on one side of the fourth input portion 316 in the third direction z, so that the third impedance of the third input portion 315 is about one-third times the fourth impedance of the fourth input portion 316.

[0083] It should be noted that the width dimensions of the first connecting portion 311, the second connecting portion 314, the first input portion 312, the second input portion 313, the third input portion 315, and the fourth input portion 316 are all the dimensions in the direction orthogonal to the current conduction direction. The thickness dimensions of the first connecting portion 311, the second connecting portion 314, the first input portion 312, the second input portion 313, the third input portion 315, and the fourth input portion 316 are all the dimensions in the third direction z. The thickness dimension of the dielectric substrate 10 is the dimension of the dielectric substrate 10 in the third direction z.

[0084] In some embodiments provided by the present application, the inner radiators 21 in each radiation unit 201 are arranged along the first direction x with the first middle radiators 221 in the radiation unit 201, and the inner radiators 21 in each radiation unit 201 are arranged along the second direction y with the second middle radiators 222 in the radiation unit 201. The first direction x is orthogonal to the second direction y;

[0085] The outer radiators 23 in each radiation unit 201 are arranged along the second direction y with the first middle radiators 221 in the radiation unit 201, and the outer radiators 23 in each radiation unit 201 are arranged along the first direction x with the second middle radiators 222 in the radiation unit 201.

[0086] Such as Figure 3As shown, there are four radiation units 201. While the four radiation units 201 are arranged in a circular array on the dielectric substrate 10, they are also arranged in a rectangular array of two rows and two columns. The multiple radiators 20 in each radiation unit 201 are arranged in a rectangular array of two rows and two columns, so that the multiple radiators 20 of the array antenna 100 form a sixteen-element rectangular array arrangement of four rows and four columns as shown in Figure 1 , Figure 3 and Figure 4 .

[0087] In some embodiments provided by the present application, the difference between the path length of the electrical signal conducted in the first input portion 312 and the path length of the electrical signal conducted in the second input portion 313 is half the wavelength of the electrical signal. The difference between the path length of the electrical signal conducted in the fourth input portion 316 and the path length of the electrical signal conducted in the third input portion 315 is half the wavelength of the electrical signal.

[0088] As Figure 4 shown, the feeding unit is located between the inner patch and the first middle patch in the corresponding radiation unit 201 in the first direction x, and the feeding unit is located between the second middle patch and the outer patch in the corresponding radiation unit 201 in the first direction x. The electrical signal input by the feeding unit to the inner patch in the corresponding radiation unit 201 and the electrical signal input by the feeding unit to the first middle patch in the corresponding radiation unit 201 are opposite in phase, so that the inner patch and the first middle patch in the radiation unit 201 radiate in the same direction. Similarly, the electrical signal input by the feeding unit to the second middle patch in the corresponding radiation unit 201 and the electrical signal input by the feeding unit to the outer patch in the corresponding radiation unit 201 are opposite in phase, so that the second middle patch and the outer patch in the radiation unit 201 radiate in the same direction, thereby improving the gain of the array antenna 100 provided by the present application.

[0089] In some embodiments provided by the present application, the conduction path length of the electrical signal in the second connection portion 314 is an integer multiple of the wavelength of the electrical signal.

[0090] Thus, the electrical signal input by the feeding unit to the inner patch in the corresponding radiation unit 201 and the electrical signal input by the feeding unit to the second middle patch in the corresponding radiation unit 201 are the same in phase, and the electrical signal input by the feeding unit to the first middle patch in the corresponding radiation unit 201 and the electrical signal input by the feeding unit to the outer patch in the corresponding radiation unit 201 are the same in phase, so that the multiple radiators 20 in the radiation unit 201 radiate in the same direction, further improving the gain of the array antenna 100 provided by the present application.

[0091] In some embodiments provided by the present application, the multiple feeding units include a first unit 31, a second unit 32, a third unit 33, and a fourth unit 34. The first unit 31 and the second unit 32 are symmetrically arranged with respect to the first direction x. The third unit 33 and the fourth unit 34 are symmetrically arranged with respect to the first direction x. And the first unit 31 and the third unit 33 are symmetrically arranged with respect to the second direction y.

[0092] The feeding network 30 further includes a fifth connection part 35. The fifth connection part 35 is connected to the signal source. The electrical signal input by the fifth connection part 35 to the first unit 31 and the electrical signal input by the fifth connection part 35 to the second unit 32 are opposite in phase. The electrical signal input by the fifth connection part 35 to the first unit 31 and the electrical signal input by the fifth connection part 35 to the third unit 33 are the same in phase. And the electrical signal input by the fifth connection part 35 to the second unit 32 and the electrical signal input by the fifth connection part 35 to the fourth unit 34 are the same in phase.

[0093] As Figure 3 shown, the fifth connection part 35 is provided with an input port. The input port is electrically connected to the signal source. The fifth connection part 35 extends along the first direction x. The difference between the distance from the input port to one end of the fifth connection part 35 in the first direction x and the distance from the input port to the other end of the fifth connection part 35 in the first direction x is half of the wavelength of the electrical signal in the feeding network 30.

[0094] The first unit 31 and the third unit 33 are symmetrically arranged along the second direction y. And both the first unit 31 and the third unit 33 are connected to the same end of the fifth connection part 35 in the first direction x. The second unit 32 and the fourth unit 34 are symmetrically arranged along the second direction y. And both the second unit 32 and the fourth unit 34 are connected to the other end of the fifth connection part 35 in the first direction x.

[0095] Thus, through the above design of the feeding network 30, the multiple inner layer radiators 21, the multiple middle layer radiators 22, and the multiple outer layer radiators 23 all radiate in the same direction, thereby improving the gain of the array antenna 100 provided by the embodiments of the present application.

[0096] In some embodiments provided by the present application, there are multiple feeding networks 30. The multiple feeding networks 30 include a first feeding network 301 and a second feeding network 302. The first feeding network 301 is connected to the ends of the multiple radiators 20 along the first direction x. The second feeding network 302 is connected to the ends of the multiple radiators 20 along the second direction y.

[0097] As Figure 1 、 Figure 3 、 Figure 4 and Figure 5As shown, the first feed network 301 is connected to the ends of the plurality of radiators 20 in the first direction x, so as to excite the plurality of radiators 20 through the first feed network 301 to generate a beam polarized in the first direction x. The second feed network 302 is connected to the ends of the plurality of radiators 20 in the second direction y, so as to excite the plurality of radiators 20 through the second feed network 302 to generate a beam polarized in the second direction y, thereby enabling the array antenna 100 provided in the present application to achieve low sidelobe radiation with co-aperture dual polarization.

[0098] In some embodiments provided in the present application, one side of the dielectric substrate 10 in the third direction z has a first surface 11, and the other side of the dielectric substrate 10 in the third direction z has a second surface 12.

[0099] In some embodiments, as Figure 1 and Figure 6 shown, the first feed network 301 is disposed on the first surface 11, at least one break 36 is provided in a part of the second feed network 302, a part of the first feed network 301 extends in the break 36, the second feed network 302 further includes a crossover portion 37, the crossover portion 37 is disposed on the second surface 12, one end of the crossover portion 37 is connected to one end of the break 36 through a metallized via, and the other end of the crossover portion 37 is connected to the other end of the break 36 through a metallized via.

[0100] Thus, the first feed network 301 and most of the second feed network 302 are disposed on the same surface of the dielectric substrate 10, simplifying the process of printing the feed network 30 on the dielectric substrate 10.

[0101] In some embodiments (not shown in the figure), the plurality of radiators 20 are disposed on the first surface 11, the first feed network 301 is disposed on the first surface 11 and the first feed network 301 is directly connected to the plurality of radiators 20, and the second feed network 302 is disposed on the second surface 12 and the second feed network 302 is coupled to the plurality of radiators 20.

[0102] Thus, the first feed network 301 and the second feed network 302 are respectively disposed on the first surface 11 and the second surface 12, avoiding opening vias on the dielectric substrate 10 and simplifying the manufacturing process of the array antenna 100.

[0103] The communication device provided in the embodiments of the present application will be described below.

[0104] The communication device provided in the present application includes the array antenna 100 in any of the above embodiments.

[0105] The array antenna 100 provided in the embodiments of the present application simultaneously has the characteristics of low sidelobes and high gain, so that the communication device provided in the present application has the advantages of better radiation directivity and higher communication quality.

[0106] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within 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 arranged on the dielectric substrate, the plurality of radiators include at least one inner radiator, a plurality of middle radiators and a plurality of outer radiators, the plurality of middle radiators are arranged in a circular array around the inner radiator, and the plurality of outer radiators are arranged in a circular array around the plurality of middle radiators; A feeding network is used to be connected to a signal source, the inner radiator, the middle radiator and the outer radiator are all connected to the feeding network, the impedance of the feeding network between the inner radiator and the signal source is smaller than the impedance of the feeding network between the middle radiator and the signal source, and the impedance of the feeding network between the middle radiator and the signal source is smaller than the impedance of the feeding network between the outer radiator and the signal source.

2. The array antenna according to claim 1, wherein: The radiator array includes a plurality of radiating units arranged in a ring array, the radiating units include an inner radiator, a first middle radiator, a second middle radiator and an outer radiator, the feeding network includes a plurality of feeding units, and the feeding units correspond to the radiating units one by one; Among them, the impedance of the electrical signal of the signal source input into the inner radiator through the feeding unit is 0.3 times to 0.35 times the impedance of the electrical signal input into the middle radiator through the feeding unit, and the impedance of the electrical signal input into the middle radiator through the feeding unit is 0.3 times to 0.35 times the impedance of the electrical signal input into the outer radiator through the feeding unit.

3. The array antenna according to claim 2, characterized in that: The feeding unit comprises: A first connecting portion, used to be electrically connected to the signal source; A first input portion, connected between the first connection portion and the inner radiator, the first input portion having a first impedance; A second input portion, connected between the first connection portion and the first middle-layer radiator, the second input portion having a second impedance; a second connection portion connected to the first connection portion, wherein the second connection portion has the second impedance; a third input portion, electrically connected to the first connection portion through the second connection portion, and the third input portion is connected to the second middle-layer radiator, and the third input portion has a third impedance; a fourth input portion, electrically connected to the first connection portion through the second connection portion, the fourth input portion is connected to the outer radiator, and the fourth input portion has a fourth impedance; The first impedance is 0.3 to 0.35 times of the second impedance, and the third impedance is 0.3 to 0.35 times of the fourth impedance.

4. The array antenna according to claim 3, characterized in that: The width dimension of the first input part may be 0.27 times to 0.33 times the width dimension of the second input part, and the width dimension of the first input part may be 0.27 times to 0.33 times the width dimension of the second connecting part, and the width dimension of the third input part may be 0.27 times to 0.33 times the width dimension of the fourth input part.

5. The array antenna according to claim 3, characterized in that: The inner radiator in each of the radiation units and the first middle radiator in the radiation unit are arranged along a first direction, and the inner radiator in each of the radiation units and the second middle radiator in the radiation unit are arranged along a second direction, and the first direction is orthogonal to the second direction; The outer radiator in each of the radiation units and the first middle radiator in the radiation unit are arranged along the second direction, and the outer radiator in each of the radiation units and the second middle radiator in the radiation unit are arranged along the first direction.

6. The array antenna according to claim 5, characterized in that: The difference between the path length of the electrical signal conducted at the first input part and the path length of the electrical signal conducted at the second input part is an odd multiple of half the wavelength of the electrical signal, and the difference between the path length of the electrical signal conducted at the fourth input part and the path length of the electrical signal conducted at the third input part is an odd multiple of half the wavelength of the electrical signal; And / or, the length of the conduction path of the electrical signal in the second connecting portion is a positive integer multiple of the wavelength of the electrical signal.

7. The array antenna according to claim 5, characterized in that: The plurality of feeding units include a first unit, a second unit, a third unit and a fourth unit, the first unit and the second unit are symmetrically arranged about the first direction, the third unit and the fourth unit are symmetrically arranged about the first direction, and the first unit and the third unit are symmetrically arranged about the second direction; The feeding network also includes a fifth connection part, which is connected to the signal source, the electrical signal input to the first unit by the fifth connection part is opposite in phase to the electrical signal input to the second unit by the fifth connection part, the electrical signal input to the first unit by the fifth connection part is the same in phase as the electrical signal input to the third unit by the fifth connection part, and the electrical signal input to the second unit by the fifth connection part is the same in phase as the electrical signal input to the fourth unit by the fifth connection part.

8. The array antenna according to claim 7, characterized in that: The fifth connection portion is provided with a feeding port, the feeding port is used to be connected to a signal source, and the difference between the path length of the electrical signal transmitted from the feeding port to one end of the fifth connection portion and the path length of the electrical signal transmitted from the feeding port to the other end of the fifth connection portion is an odd multiple of half the wavelength of the electrical signal; The first input part of the first unit and the first input part of the third unit are both connected to one end of the fifth connection part in the first direction, and the first input part of the second unit and the first input part of the fourth unit are both connected to the other end of the fifth connection part in the first direction.

9. The array antenna according to any one of claims 5 to 6, characterized in that: There are multiple feeding networks, including a first feeding network and a second feeding network. The first feeding network is connected to the ends of the multiple radiators along the first direction, and the second feeding network is connected to the ends of the multiple radiators along the second direction.

10. A communication device, characterized in that: Comprising the array antenna as described in any one of claims 1-9.

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