Radiating device and multi-band array antenna

Abstract

The embodiments of the present application provide a radiation device and a multi-band array antenna, which relate to the field of antenna technology and can integrate more radiation devices without increasing or only increasing the size of the multi-band array antenna. The radiation device includes a radiation module, a first wire balun, and a second wire balun, wherein the first wire balun and the second wire balun are mechanically connected below the radiation module; the radiation module includes a first radiation unit and a second radiation unit located in a +45° polarization direction, and a third radiation unit and a fourth radiation unit located in a -45° polarization direction; the first wire balun is configured to feed a first differential signal to the first radiation unit and the second radiation unit, and the second wire balun is configured to feed a second differential signal to the third radiation unit and the fourth radiation unit, and the first wire balun and the second wire balun are arranged coplanar. The radiation device provided in the embodiments of the present application is used in a mobile communication system.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a radiation device and a multi-band array antenna. Background Art

[0002] With the advancement of mobile communication technology and the upgrading of communication systems, multi-band, multi-radiator array antennas, which enable the coexistence of second-, third-, and fourth-generation communication systems, are a major development trend. Integrating more radiators in multi-band array antennas while maintaining or minimizing the increase in size is a challenge facing the mobile communications industry.

[0003] In the case of size constraints, to integrate more radiating devices, it is necessary to reduce the distance between two adjacent radiating devices. However, the structure of the feed balun in the radiating device of the prior art has become the main factor limiting the reduction of the distance between two adjacent radiating devices. For example, Figure 1 It is a radiation device in the prior art, such as Figure 1 As shown, the radiation device includes a first radiation module 01, a second radiation module 02, a first wire balun 03 and a second wire balun 04. The first radiation module 01 is used for -45° polarization, and the second radiation module 02 is used for +45° polarization. The first wire balun 03 is used to feed the first radiation module 01, and the second wire balun 04 is used to feed the second radiation module 02. The first wire balun 03 and the second wire balun 04 are arranged orthogonally. In this way, the balun structure composed of the first wire balun 03 and the second wire balun 04 occupies a large space. When forming a multi-band array antenna, the structure of the array antenna can be Figure 2 As shown, the distance between the radiation device 001 operating in a lower frequency band and the adjacent radiation device 002 operating in a higher frequency band is relatively large, which is not conducive to a compact array layout. Summary of the Invention

[0004] The embodiments of the present application provide a radiation device and a multi-band array antenna, which can integrate more radiation devices without increasing or only increasing the size of the multi-band array antenna.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a radiation device, comprising a radiation module, a first wire balun and a second wire balun, wherein the first wire balun and the second wire balun are mechanically connected below the radiation module; the radiation module comprises a first radiation unit and a second radiation unit located in a +45° polarization direction, and a third radiation unit and a fourth radiation unit located in a -45° polarization direction, and the first radiation unit, the second radiation unit, the third radiation unit and the fourth radiation unit are isolated from each other; the first wire balun is configured to feed a first differential signal to the first radiation unit and the second radiation unit, and the second wire balun is configured to feed a second differential signal to the third radiation unit and the fourth radiation unit, and the first wire balun and the second wire balun are arranged in the same plane.

[0007] The radiation device provided in the embodiment of the present application includes a radiation module, a first wire balun and a second wire balun, the first wire balun and the second wire balun are arranged below the radiation module, the radiation module includes a first radiation unit and a second radiation unit located in the +45° polarization direction, and a third radiation unit and a fourth radiation unit located in the -45° polarization direction, the first wire balun is configured to feed a first differential signal to the first radiation unit and the second radiation unit, and the second wire balun is configured to feed a second differential signal to the third radiation unit and the fourth radiation unit, the first wire balun and the second wire balun are arranged in the same plane, therefore, the balun structure composed of the first wire balun and the second wire balun occupies a small space, when the radiation device is applied to a multi-band array antenna, the spacing between the radiation device of the structure and the adjacent radiation device operating in a higher frequency band can be further reduced, thereby enabling more radiation devices to be integrated without increasing or increasing the size of the multi-band array antenna very little.

[0008] Optionally, the radiating module is provided with a first jack, and the upper ends of the first and second wire baluns are provided with first plugging protrusions, which are matingly plugged into the first jack. This achieves a mechanical connection between the radiating module and the first and second wire baluns, and improves installation efficiency in terms of plugging operations.

[0009] Optionally, the first wire balun and the second wire balun each include a feed wire, a first reference ground wire, a second reference ground wire, and a fixing member, the fixing member being used to fix the relative positions of the feed wire, the first reference ground wire, and the second reference ground wire; the feed wire includes a first feed wire segment and a second feed wire segment extending in a vertical direction, the first feed wire segment and the second feed wire segment being arranged side by side, the lower end of the first feed wire segment being a signal input end, and the upper end of the second feed wire segment being electrically connected to the upper end of the first feed wire segment; the first reference ground wire is parallel to the first feed wire segment, and a current can be generated between the first reference ground wire and the first feed wire segment. Capacitive coupling effect, the lower end of the first reference ground wire is the reference ground connection end, and the upper end of the first reference ground wire is the first signal output end; the second reference ground wire is parallel to the second feeding wire segment, and a capacitive coupling effect can be generated between the second reference ground wire and the second feeding wire segment, the lower end of the second reference ground wire is the reference ground connection end, and the upper end of the second reference ground wire is the second signal output end; the first signal output end and the second signal output end of the first wire balun are electrically connected to the first radiation unit and the second radiation unit respectively, and the first signal output end and the second signal output end of the second wire balun are electrically connected to the third radiation unit and the fourth radiation unit respectively. In this way, when an excitation signal (such as a current signal) is input into the feeding wire from the signal input end, the excitation signal flows from the first feeding wire segment into the second feeding wire segment. The excitation signal in the first feeding wire segment and the excitation signal in the second feeding wire segment are equal in magnitude and opposite in direction. The signals coupled between the first reference ground wire and the second reference ground wire are equal in magnitude and opposite in direction, thereby outputting differential signals from the first signal output end and the second signal output end. The first wire balun and the second wire balun of this structure have simple structures and better symmetry of the directional pattern.

[0010] Optionally, the feeder conductor further includes a third feeder conductor segment extending horizontally, one end of the third feeder conductor segment being electrically connected to the upper end of the first feeder conductor segment, and the other end of the third feeder conductor segment being electrically connected to the upper end of the second feeder conductor segment. In this manner, the feeder conductor has a simple structure and uses less material.

[0011] Optionally, the first feed wire segment and the second feed wire segment are located in the same plane, and the plane in which the first feed wire segment and the second feed wire segment lie is a first plane. The first reference ground wire and the second reference ground wire are located in the same plane, and the plane in which the first reference ground wire and the second reference ground wire lie is a second plane. The first plane and the second plane are parallel and opposite to each other. In the first-wire balun and the second-wire balun of this structure, the feed wire, the first reference ground wire, and the second reference ground wire are dispersed in two parallel and opposite planes, which helps reduce the width of the first-wire balun and the second-wire balun, thereby further reducing the occupied space of the balun structure composed of the first-wire balun and the second-wire balun.

[0012] Optionally, the feed wire, the first reference ground wire and the second reference ground wire are located in the same plane. The first wire balun and the second wire balun have simple structures and are easy to manufacture.

[0013] Optionally, the fixing member is a vertically disposed first insulating substrate, and the feed wire, first reference ground wire, and second reference ground wire are each a metal layer disposed on the first insulating substrate. This fixing member has a relatively small size, and the feed wire, first reference ground wire, and second reference ground wire can be formed on the first insulating substrate using a mature printing process, making it easy to manufacture.

[0014] Optionally, the fixing member includes a fixing member base, on which a first slot, a second slot, and a third slot are provided. The feed wire is snapped into the first slot, the first reference ground wire is snapped into the second slot, and the second reference ground wire is snapped into the third slot. In this way, the relative positions of the feed wire, the first reference ground wire, and the second reference ground wire are fixed by the fixing member base and the first slot, the second slot, and the third slot provided on the fixing member base. Moreover, the connections between the fixing member base and the feed wire, between the fixing member base and the first reference ground wire, and between the fixing member base and the second reference ground wire are detachable. Therefore, when any one of the fixing member base, the feed wire, the first reference ground wire, and the second reference ground wire is damaged, the damaged component can be removed for repair or replacement. Therefore, the repair cost is low, the snapping operation is convenient, and the installation and disassembly efficiency is high.

[0015] Optionally, the fixing member of the first wire balun and the fixing member of the second wire balun are integrally formed, so that the number of components included in the radiation device can be reduced, the installation efficiency can be improved, and the production cost can be saved.

[0016] Optionally, the first wire balun and the second wire balun both include a feeding wire, a reference ground wire and a fixing member, wherein the fixing member is used to fix the relative position of the feeding wire and the reference ground wire; the feeding wire extends in a vertical direction, the lower end of the feeding wire is the signal input end, and the upper end of the feeding wire is the first signal output end; the reference ground wire is parallel to the feeding wire, and a capacitive coupling effect can be generated between the reference ground wire and the feeding wire, the lower end of the reference ground wire is the reference ground connection end, and the upper end of the reference ground wire is the second signal output end; the first signal output end and the second signal output end of the first wire balun are electrically connected to the first radiation unit and the second radiation unit respectively, and the first signal output end and the second signal output end of the second wire balun are electrically connected to the third radiation unit and the fourth radiation unit respectively. In this way, when an excitation signal (such as a current signal) is input into the feeding wire from the signal input end, one signal in the differential signal can be output from the first signal output end at the upper end of the feeding wire, the reference ground wire is coupled to the feeding wire, and the other signal in the differential signal is output from the second signal output end at the upper end of the reference ground wire. The structure of the first wire balun and the second wire balun is simple and the cost is low.

[0017] Optionally, the reference ground conductor includes a first reference ground conductor unit and a second reference ground conductor unit extending in a vertical direction, wherein the upper end of the first reference ground conductor unit is electrically connected to the upper end of the second reference ground conductor unit, and the lower end of the first reference ground conductor unit is electrically connected to the lower end of the second reference ground conductor unit, and the first reference ground conductor unit and the second reference ground conductor unit are symmetrically arranged with respect to the feed conductor. In this way, the symmetry of the directional pattern can be increased.

[0018] Optionally, the feed wire, the first reference ground wire unit, and the second reference ground wire unit are all strip wires, and the feed wire, the first reference ground wire unit, and the second reference ground wire unit are coplanarly arranged. The first wire balun and the second wire balun have simple structures and are easy to manufacture.

[0019] Optionally, the feed conductor, the first reference ground conductor unit, and the second reference ground conductor unit are all strip conductors, the feed conductor is located in a third plane, the first reference ground conductor unit is located in a fourth plane, and the second reference ground conductor unit is located in a fifth plane, the fourth plane and the fifth plane are respectively located on opposite sides of the third plane, and the fourth plane and the fifth plane are both parallel to and opposite to the third plane. In the first conductor balun and the second conductor balun of this structure, the feed conductor, the first reference ground conductor unit, and the second reference ground conductor unit are arranged in three parallel and opposite planes, which helps reduce the width of the first conductor balun and the second conductor balun, thereby further reducing the occupied space of the balun structure composed of the first conductor balun and the second conductor balun.

[0020] Optionally, the radiating device further includes a substrate mechanically connected to the lower ends of the first and second wire baluns. The substrate includes a reference ground, a first feed terminal, and a second feed terminal, which are isolated from each other. The reference ground connection end of the first and second wire baluns are both electrically connected to the reference ground. The signal input end of the first wire balun is electrically connected to the first feed terminal, and the signal input end of the second wire balun is electrically connected to the second feed terminal. In this way, the substrate can support the first and second wire baluns, and the radiating module, and the first and second feed terminals are disposed on the substrate, facilitating access to the feed cable.

[0021] Optionally, a second socket is provided on the base, and a second plug-in protrusion is provided at the lower end of the first wire balun and the second wire balun. The second plug-in protrusion is plugged into the second socket, thereby realizing a mechanical connection between the first wire balun and the base, and between the second wire balun and the base. In terms of plug-in operation, the installation efficiency is high.

[0022] Optionally, the base further includes a horizontally disposed second insulating substrate, the reference ground is a metal layer disposed on one of the upper and lower surfaces of the second insulating substrate, and the first and second feed terminals are metal layers disposed on the other of the upper and lower surfaces of the second insulating substrate. In this manner, the first and second feed terminals are isolated from the reference ground by the second insulating substrate, and the reference ground, first and second feed terminals can be formed on the second insulating substrate using a mature printing process, making them easy to manufacture.

[0023] Optionally, the substrate includes a first coaxial feed line and a second coaxial feed line, the first coaxial feed line being located below the first conductor balun, the second coaxial feed line being located below the second conductor balun, the reference ground being the outer conductor of the first coaxial feed line and the outer conductor of the second coaxial feed line, the first feed terminal being the inner conductor of the first coaxial feed line, and the second feed terminal being the inner conductor of the second coaxial feed line. This structure is simple and easy to implement.

[0024] Optionally, the radiation module further includes a horizontally disposed third insulating substrate, and the first, second, third, and fourth radiation units are metal layers disposed on the upper surface of the third insulating substrate. This structure results in a relatively small radiation module, and the first, second, third, and fourth radiation units can be formed on the third insulating substrate using a mature and readily manufactured printing process.

[0025] In the second aspect, an embodiment of the present application provides a multi-band array antenna, including a reflector and an array of radiating devices arranged on the reflector, the array of radiating devices including a first radiating device and a second radiating device arranged adjacent to each other, the operating frequency band of the first radiating device being higher than the operating frequency band of the second radiating device, and the second radiating device being a radiating device as described in any of the above technical solutions.

[0026] The multi-band array antenna provided in the embodiment of the present application includes a reflector and an array of radiating devices arranged on the reflector, the array of radiating devices includes a first radiating device and a second radiating device arranged adjacent to each other, the operating frequency band of the first radiating device is higher than the operating frequency band of the second radiating device, so the volume of the first radiating device is smaller than the volume of the second radiating device, the baluns of the first radiating device and the second radiating device are flush, and since the second radiating device is a radiating device as described in any of the above technical solutions, the first wire balun and the second wire balun of the second radiating device are coplanarly arranged, and the balun structure composed of the first wire balun and the second wire balun occupies a smaller space, which is conducive to reducing the distance between the first radiating device and the second radiating device, thereby enabling more radiating devices to be integrated without increasing or increasing the size of the multi-band array antenna very little. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a radiation device provided by the prior art;

[0028] Figure 2 A schematic diagram of the structure of a multi-band array antenna provided by the prior art;

[0029] Figure 3 A schematic structural diagram of a first radiation device provided in an embodiment of the present application;

[0030] Figure 4 for Figure 3 A schematic structural diagram of a radiation module in the radiation device shown;

[0031] Figure 5 for Figure 4 A schematic diagram of the connection structure between the third radiation unit, the fourth connecting wire and the seventh pad in the radiation module shown;

[0032] Figure 6 for Figure 3 A schematic diagram of the front structure of a balun structure composed of a first wire balun and a second wire balun in the radiation device shown;

[0033] Figure 7 for Figure 3 A schematic diagram of the back structure of the balun structure composed of a first wire balun and a second wire balun in the radiation device shown;

[0034] Figure 8 for Figure 3 A schematic structural diagram of a feeding wire of the first wire balun in the radiating device shown;

[0035] Figure 9 for Figure 3 A schematic structural diagram of a feeding wire of a second wire balun in the radiating device shown;

[0036] Figure 10 for Figure 3 A schematic structural diagram of the upper surface of the substrate in the radiation device shown;

[0037] Figure 11 for Figure 3 A schematic structural diagram of the lower surface of the substrate in the radiation device shown;

[0038] Figure 12 for Figure 3 The simulation results of the radiation patterns of the radiating device shown are shown when it operates at low frequency, medium frequency and high frequency points within the low frequency band respectively;

[0039] Figure 13 A schematic structural diagram of a second radiation device provided in an embodiment of the present application;

[0040] Figure 14 for Figure 13 A schematic diagram of the assembly structure of the first wire balun, the second wire balun and the substrate in the radiation device shown;

[0041] Figure 15 for Figure 13 An exploded view of the first wire balun, the second wire balun and the substrate in the radiating device;

[0042] Figure 16 A schematic structural diagram of a third radiation device provided in an embodiment of the present application;

[0043] Figure 17 for Figure 16 An exploded view of a first type of balun structure composed of a first wire balun and a second wire balun in the radiation device shown;

[0044] Figure 18 for Figure 16 An exploded view of a second type of balun structure composed of a first wire balun and a second wire balun in the radiation device shown;

[0045] Figure 19 for Figure 16 An exploded view of a third type of balun structure composed of a first conductor balun and a second conductor balun in the radiation device shown;

[0046] Figure 20 A three-dimensional diagram of a multi-band array antenna provided in an embodiment of the present application;

[0047] Figure 21 This is a front view of the multi-band array antenna provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 on this application.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0050] In the embodiments of the present application, a balun refers to a device that can realize conversion between single-ended signals and differential signals, and a wire balun refers to a balun composed of multiple wires and a fixed structure for fixing the relative positions of the multiple wires, wherein the multiple wires can be arranged in one plane, in two parallel and opposite planes, or in three or more parallel and opposite planes, and the multiple wires can be microstrip lines, coplanar lines or strip lines, etc., which are not specifically limited here.

[0051] First, as Figure 3 As shown, an embodiment of the present application provides a radiation device, including a radiation module 1, a first wire balun 2 and a second wire balun 3, wherein the first wire balun 2 and the second wire balun 3 are mechanically connected below the radiation module 1; Figure 4 As shown, the radiation module 1 includes a first radiation unit 12a and a second radiation unit 12b located in a +45° polarization direction, and a third radiation unit 12c and a fourth radiation unit 12d located in a −45° polarization direction. The first radiation unit 12a, the second radiation unit 12b, the third radiation unit 12c and the fourth radiation unit 12d are isolated from each other; Figure 3 and Figure 4 As shown, the first wire balun 2 is configured to feed a first differential signal to the first radiation unit 12a and the second radiation unit 12b, and the second wire balun 3 is configured to feed a second differential signal to the third radiation unit 12c and the fourth radiation unit 12d. The first wire balun 2 and the second wire balun 3 are arranged in the same plane.

[0052] It should be noted that the coplanar arrangement of the first wire balun 2 and the second wire balun 3 means that: when the multiple wires constituting the first wire balun 2 are arranged in one plane, and the multiple wires constituting the second wire balun 3 are also arranged in one plane, the surface on which the multiple wires included in the first wire balun 2 are arranged is coplanar with the surface on which the multiple wires included in the second wire balun 3 are arranged; when the multiple wires constituting the first wire balun 2 are arranged in two parallel and opposite planes, and the multiple wires constituting the second wire balun 3 are also arranged in two parallel and opposite planes, the surface on which the multiple wires included in the first wire balun 2 are arranged is coplanar with the surface on which the multiple wires included in the second wire balun 3 are arranged. The two surfaces are respectively coplanar with the two surfaces on which the multiple wires included in the second wire balun 3 are arranged; when the multiple wires constituting the first wire balun 2 are arranged in three or more parallel and opposite planes, the multiple wires constituting the second wire balun 3 are also arranged in three or more parallel and opposite planes, and the number of surfaces on which the multiple wires included in the first wire balun 2 are arranged is equal to the number of surfaces on which the multiple wires included in the second wire balun 3 are arranged, the multiple surfaces on which the multiple wires included in the first wire balun 2 are arranged are respectively coplanar with the multiple surfaces on which the multiple wires included in the second wire balun 3 are arranged.

[0053] The first conductor balun 2 is configured to feed a first differential signal to the first radiation element 12a and the second radiation element 12b. Specifically, Figure 4 As shown, the first wire balun 2 is configured to feed a first differential signal to an end of the first radiating element 12a close to the second radiating element 12b and an end of the second radiating element 12b close to the first radiating element 12a, that is, the output ends of the two differential signals of the first wire balun 2 are electrically connected to an end of the first radiating element 12a close to the second radiating element 12b and an end of the second radiating element 12b close to the first radiating element 12a, respectively.

[0054] The second wire balun 3 is configured to feed a second differential signal to the third radiation unit 12c and the fourth radiation unit 12d. Specifically, the second wire balun 3 is configured to feed a second differential signal to an end of the third radiation unit 12c close to the fourth radiation unit 12d and an end of the fourth radiation unit 12d close to the third radiation unit 12c. That is, the output ends of the two differential signals of the second wire balun 3 are electrically connected to an end of the third radiation unit 12c close to the fourth radiation unit 12d and an end of the fourth radiation unit 12d close to the third radiation unit 12c, respectively.

[0055] The radiation module 1 and the first wire balun 2, as well as the radiation module 1 and the second wire balun 3, can be mechanically connected by plugging, threading or welding, which is not specifically limited here. Figure 4 As shown, the radiation module 1 is provided with a first socket 17, as shown in FIG. Figure 6As shown, the upper ends of the first wire balun 2 and the second wire balun 3 are provided with a first plug-in protrusion 5, as shown in FIG. Figure 3 As shown, the first plug-in protrusion 5 is plugged into the first plug-in hole 17, thereby realizing the mechanical connection between the radiation module 1 and the first wire balun 2, and between the radiation module 1 and the second wire balun 3. In terms of plug-in operation, the installation efficiency is high.

[0056] The radiation device provided in the embodiment of the present application is as follows: Figure 3 As shown, since the radiation device includes a radiation module 1, a first wire balun 2 and a second wire balun 3, the first wire balun 2 and the second wire balun 3 are arranged below the radiation module 1, as shown in FIG. Figure 4 As shown, the radiation module 1 includes a first radiation unit 12a and a second radiation unit 12b located in the +45° polarization direction, and a third radiation unit 12c and a fourth radiation unit 12d located in the −45° polarization direction. Figure 3 and Figure 4 As shown, the first wire balun 2 is configured to feed a first differential signal to the first radiating element 12a and the second radiating element 12b, and the second wire balun 3 is configured to feed a second differential signal to the third radiating element 12c and the fourth radiating element 12d. The first wire balun 2 and the second wire balun 3 are arranged in the same plane. Therefore, the balun structure composed of the first wire balun 2 and the second wire balun 3 occupies a small space. When the radiating device is applied to a multi-band array antenna, the distance between the radiating device of the structure and the adjacent radiating device operating in a higher frequency band can be further reduced, thereby enabling more radiating devices to be integrated without increasing or increasing the size of the multi-band array antenna very little.

[0057] There are various structural forms of the first wire balun 2 and the second wire balun 3. For example, the structures of the first wire balun 2 and the second wire balun 3 may include the following two embodiments:

[0058] Example 1, as Figure 6 and Figure 7As shown, the first wire balun 2 includes a feeding wire 21, a first reference ground wire 22, a second reference ground wire 23 and a fixing member 24, the fixing member 24 is used to fix the relative positions of the feeding wire 21, the first reference ground wire 22 and the second reference ground wire 23; the feeding wire 21 includes a first feeding wire segment 211 and a second feeding wire segment 212 extending in a vertical direction, the first feeding wire segment 211 and the second feeding wire segment 212 are arranged side by side, the lower end of the first feeding wire segment 211 is a signal input end, and the upper end of the second feeding wire segment 212 is electrically connected to the upper end of the first feeding wire segment 211; the first reference ground wire 22 and the first feeding wire segment 211 are electrically connected to each other. The first reference ground wire 22 is parallel to the first feeding wire segment 211, and a capacitive coupling effect can be generated between the first reference ground wire 22 and the first feeding wire segment 211. The lower end of the first reference ground wire 22 is the reference ground connection end, and the upper end of the first reference ground wire 22 is the first signal output end; the second reference ground wire 23 is parallel to the second feeding wire segment 212, and a capacitive coupling effect can be generated between the second reference ground wire 23 and the second feeding wire segment 212. The lower end of the second reference ground wire 23 is the reference ground connection end, and the upper end of the second reference ground wire 23 is the second signal output end; the second wire balun 3 includes a feeding wire 31, a first reference ground wire 32, a second reference ground wire 33 and a fixing member 34, the fixing member 3 4 is used to fix the relative positions of the feeding wire 31, the first reference ground wire 32, and the second reference ground wire 33; the feeding wire 31 includes a first feeding wire segment 311 and a second feeding wire segment 312 extending in the vertical direction, the first feeding wire segment 311 and the second feeding wire segment 312 are arranged side by side, the lower end of the first feeding wire segment 311 is a signal input end, and the upper end of the second feeding wire segment 312 is electrically connected to the upper end of the first feeding wire segment 311; the first reference ground wire 32 is parallel to the first feeding wire segment 311, and a capacitive coupling effect can be generated between the first reference ground wire 32 and the first feeding wire segment 311. The lower end of the first reference ground wire 32 is a reference input end. The reference ground connection end, the upper end of the first reference ground wire 32 is the first signal output end; the second reference ground wire 33 is parallel to the second feeding wire segment 312, and a capacitive coupling effect can be generated between the second reference ground wire 33 and the second feeding wire segment 312. The lower end of the second reference ground wire 33 is the reference ground connection end, and the upper end of the second reference ground wire 33 is the second signal output end; the first signal output end and the second signal output end of the first wire balun 2 are electrically connected to the first radiation unit 12a and the second radiation unit 12b respectively, and the first signal output end and the second signal output end of the second wire balun 3 are electrically connected to the third radiation unit 12c and the fourth radiation unit 12d respectively.In this way, when an excitation signal (such as a current signal) is input into the feeding wire 21 from the signal input end of the first wire balun 2, the excitation signal flows from the first feeding wire segment 211 to the second feeding wire segment 212. The excitation signal in the first feeding wire segment 211 and the excitation signal in the second feeding wire segment 212 are equal in magnitude and opposite in direction. The signals coupled in the first reference ground wire 22 and the second reference ground wire 23 are equal in magnitude and opposite in direction, so that a differential signal is output from the first signal output end and the second signal output end of the first wire balun 2. Similarly, when an excitation signal (such as a current signal) is input to the feed wire 31 from the signal input terminal of the second wire balun 3, the excitation signal flows from the first feed wire segment 311 to the second feed wire segment 312. The excitation signal in the first feed wire segment 311 and the excitation signal in the second feed wire segment 312 are equal in magnitude and opposite in direction. The signals coupled from the first reference ground wire 32 and the second reference ground wire 33 are equal in magnitude and opposite in direction, thereby outputting a differential signal from the first signal output terminal and the second signal output terminal of the second wire balun 3. This structure of the first and second wire baluns is simple, and the symmetry of the directivity patterns is excellent.

[0059] In the above embodiment, the first signal output terminal and the second signal output terminal of the first wire balun 2 can be electrically connected to the first radiation unit 12a and the second radiation unit 12b respectively by means of wire connection, flexible circuit board connection, welding, etc., which are not specifically limited here. In some embodiments, as Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, the first signal output terminal and the second signal output terminal of the first wire balun 2 are electrically connected to the first radiation unit 12a and the second radiation unit 12b respectively by welding. Specifically, as shown in FIG. Figure 6 and Figure 7 As shown, the first signal output end of the first wire balun 2 is provided with a first pad 22a, and the second signal output end of the first wire balun 2 is electrically connected to the second pad 23a through a metallized via 23b. Figure 4 As shown, the radiation module 1 is provided with a third pad 13a and a fourth pad 13b. The third pad 13a is electrically connected to the first radiation unit 12a, and the fourth pad 13b is electrically connected to the second radiation unit 12b. The first pad 22a is welded to the third pad 13a, and the second pad 23a is welded to the fourth pad 13b. Similarly, the first signal output terminal and the second signal output terminal of the second wire balun 3 can be electrically connected to the third radiation unit 12c and the fourth radiation unit 12d respectively by wire connection, flexible circuit board connection, welding, etc., which are not specifically limited here. In some embodiments, as Figure 3 、 Figure 4 、 Figure 6 and Figure 7As shown, the first signal output terminal and the second signal output terminal of the second wire balun 3 are electrically connected to the third radiation unit 12c and the fourth radiation unit 12d respectively by welding. Specifically, as shown in FIG. Figure 6 and Figure 7 As shown, the first signal output end of the second wire balun 3 is provided with a fifth pad 32a, and the second signal output end of the second wire balun 3 is electrically connected to the sixth pad 33a through a metallized via 33b, as shown in FIG. Figure 4 As shown, the radiation module 1 is provided with a seventh solder pad 13c and an eighth solder pad 13d. The seventh solder pad 13c is electrically connected to the third radiation element 12c, the eighth solder pad 13d is electrically connected to the fourth radiation element 12d, the sixth solder pad 33a is welded to the seventh solder pad 12c, and the fifth solder pad 32a is welded to the eighth solder pad 12d. When electrical connections are achieved through welding, the appearance is neat and the reliability of the electrical connections is improved.

[0060] In the above embodiment, in order to ensure that the first wire balun 2 and the second wire balun 3 can accurately feed the differential signal to the radiation module 1, cross interference should be avoided between the electrical connection path between the third pad 13a and the first radiation unit 12a, the electrical connection path between the fourth pad 13b and the second radiation unit 12b, the electrical connection path between the seventh pad 13c and the third radiation unit 12c, and the electrical connection path between the eighth pad 13d and the fourth radiation unit 12d. In order to achieve this purpose, in some embodiments, such as Figure 4 As shown, the radiation module 1 further includes a horizontally arranged third insulating substrate 11, the first radiation unit 12a, the second radiation unit 12b, the third radiation unit 12c and the fourth radiation unit 12d are metal layers arranged on the upper surface of the third insulating substrate 11, the third pad 13a is located on the first radiation unit 12a, the eighth pad 13d is located on the fourth radiation unit 12d, and a third connecting wire 14 is provided on the upper surface of the third insulating substrate 11. One end of the third connecting wire 14 is electrically connected to the fourth pad 13b, and the other end is electrically connected to the second radiation unit 12b. The lower surface of the third insulating substrate 11 is provided with a fourth connecting wire 15, as shown in FIG. Figure 5 As shown, one end of the fourth connecting wire 15 is electrically connected to the seventh pad 13c through a metallized via 16a provided in the third insulating substrate, and the other end is electrically connected to the third radiation unit 12c through a metallized via 16b provided in the third insulating substrate.

[0061] The feeding wire 21 of the first wire balun 2 has various structural forms, for example, Figure 8 As shown, the feeder wire 21 is an M-shaped structure, that is, the feeder wire 21 includes a first feeder wire segment 211, a third feeder wire segment 213, a fourth feeder wire segment 214 and a second feeder wire segment 212 connected in sequence. For example, Figure 6In the structure shown, the feed wire 21 is an n-type structure, that is, the feed wire 21 includes a first feed wire segment 211, a third feed wire segment 213, and a second feed wire segment 212 connected in sequence. As long as the feed wire 21 includes the first feed wire segment 211 and the second feed wire segment 212 with the excitation signals flowing in opposite directions, it will be sufficient. In some embodiments, as Figure 6 As shown, the feed wire 21 of the first wire balun 2 further includes a third feed wire segment 213, which extends horizontally. One end of the third feed wire segment 213 is electrically connected to the upper end of the first feed wire segment 211, and the other end of the third feed wire segment 213 is electrically connected to the upper end of the second feed wire segment 212. Thus, the feed wire 21 has a simple structure and uses less material.

[0062] The feeding wire 31 of the second wire balun 3 has various structural forms, for example, Figure 9 As shown, the feeder wire 31 is an M-shaped structure, that is, the feeder wire 31 includes a first feeder wire segment 311, a third feeder wire segment 313, a fourth feeder wire segment 314 and a second feeder wire segment 312 connected in sequence. For example, Figure 6 In the structure shown, the feed wire 31 is an n-type structure, that is, the feed wire 31 includes a first feed wire segment 311, a third feed wire segment 313, and a second feed wire segment 312 connected in sequence. As long as the feed wire 31 includes the first feed wire segment 311 and the second feed wire segment 312 with the excitation signals flowing in opposite directions, it will be sufficient. In some embodiments, as Figure 6 As shown, the feed wire 31 of the second wire balun 3 further includes a third feed wire segment 313, which extends horizontally. One end of the third feed wire segment 313 is electrically connected to the upper end of the first feed wire segment 311, and the other end of the third feed wire segment 313 is electrically connected to the upper end of the second feed wire segment 312. Thus, the feed wire 31 has a simple structure and uses less material.

[0063] The multiple wires included in the first wire balun 2 (including the feeding wire 21, the first reference ground wire 22 and the second reference ground wire 23) can be arranged in one plane, or arranged in two parallel and opposite planes, which is not specifically limited here. When the feeding wire 21, the first reference ground wire 22 and the second reference ground wire 23 included in the first wire balun 2 are arranged in one plane, the feeding wire 21, the first reference ground wire 22 and the second reference ground wire 23 of the first wire balun 2 are located in the same plane, and the structure of the first wire balun 2 is simple and easy to manufacture. When the feeding wire 21, the first reference ground wire 22 and the second reference ground wire 23 included in the first wire balun 2 are arranged in two parallel and opposite planes, optionally, as Figure 6 and Figure 7As shown, the first feeding wire segment 211 and the second feeding wire segment 212 of the first wire balun 2 are located in the same plane, and the plane in which the first feeding wire segment 211 and the second feeding wire segment 212 are located is the first plane. The first reference ground wire 22 and the second reference ground wire 23 of the first wire balun 2 are located in the same plane, and the plane in which the first reference ground wire 22 and the second reference ground wire 23 are located is the second plane. The first plane is parallel to and opposite to the second plane. With this structure of the first wire balun 2, the feeding wire 21, the first reference ground wire 22, and the second reference ground wire 23 of the first wire balun 2 are dispersedly arranged in two parallel and opposite planes, which is conducive to reducing the width of the first wire balun 2, thereby further reducing the occupied space of the first wire balun 2.

[0064] The multiple wires included in the second wire balun 3 (including the feeding wire 31, the first reference ground wire 32 and the second reference ground wire 33) can be arranged in one plane, or arranged in two parallel and opposite planes, which is not specifically limited here. When the feeding wire 31, the first reference ground wire 32 and the second reference ground wire 33 included in the second wire balun 3 are arranged in one plane, the feeding wire 31, the first reference ground wire 32 and the second reference ground wire 33 of the second wire balun 3 are located in the same plane, and the structure of this second wire balun 3 is simple and easy to manufacture. When the feeding wire 31, the first reference ground wire 32 and the second reference ground wire 33 included in the second wire balun 3 are arranged in two parallel and opposite planes, optionally, as Figure 6 and Figure 7 As shown, the first feeding wire segment 311 and the second feeding wire segment 312 of the second wire balun 3 are located in the same plane, and the plane in which the first feeding wire segment 311 and the second feeding wire segment 312 are located is the sixth plane. The first reference ground wire 32 and the second reference ground wire 33 of the second wire balun 3 are located in the same plane, and the plane in which the first reference ground wire 32 and the second reference ground wire 33 are located is the seventh plane. The sixth plane is parallel to and opposite to the seventh plane. With this structure of the second wire balun 3, the feeding wire 31, the first reference ground wire 32, and the second reference ground wire 33 of the second wire balun 3 are dispersedly arranged in two parallel and opposite planes, which is conducive to reducing the width of the second wire balun 3, thereby further reducing the occupied space of the second wire balun 3.

[0065] It should be noted that, in order to make the first wire balun 2 and the second wire balun 3 coplanar, the first plane is coplanar with the sixth plane, and the second plane is coplanar with the seventh plane; or, the first plane is coplanar with the seventh plane, and the second plane is coplanar with the sixth plane. In some embodiments, as Figure 6 and Figure 7 As shown, the first plane is coplanar with the sixth plane, and the second plane is coplanar with the seventh plane.

[0066] In the above embodiment 1, the fixing member has various structural forms, which specifically include the following two optional implementations:

[0067] A first optional implementation method, such as Figure 6 and Figure 7 As shown, the fixing member 24 of the first-wire balun 2 and the fixing member 34 of the second-wire balun 3 are both vertically arranged on a first insulating substrate. The feed wire 21, first reference ground wire 22, and second reference ground wire 23 of the first-wire balun 2, as well as the feed wire 31, first reference ground wire 32, and second reference ground wire 33 of the second-wire balun 3, are all metal layers disposed on the first insulating substrate. This structure of the fixing members 24 and 34 results in a relatively small size. Furthermore, the feed wire 21, first reference ground wire 22, and second reference ground wire 23 of the first-wire balun 2, as well as the feed wire 31, first reference ground wire 32, and second reference ground wire 33 of the second-wire balun 3, can be formed on the first insulating substrate using a mature printing process, making it easy to manufacture.

[0068] A second optional implementation method, such as Figure 13 、 Figure 14 and Figure 15 As shown, the fixing member 24 of the first wire balun 2 includes a fixing member base 241, and the fixing member base 241 is provided with a first card slot 242, a second card slot 243 and a third card slot 244. The feeding wire 21 is clamped in the first card slot 242, the first reference ground wire 22 is clamped in the second card slot 243, and the second reference ground wire 23 is clamped in the third card slot 244. In this way, the relative positions of the feed wire 21, the first reference ground wire 22, and the second reference ground wire 23 are fixed by the fixing base 241 and the first card slot 242, the second card slot 243, and the third card slot 244 provided on the fixing base 241, and the connections between the fixing base 241 and the feed wire 21, between the fixing base 241 and the first reference ground wire 22, and between the fixing base 241 and the second reference ground wire 23 are detachable. Therefore, when any one of the fixing base 241, the feed wire 21, the first reference ground wire 22, and the second reference ground wire 23 is damaged, the damaged part can be removed for repair or replacement. Therefore, the repair cost is low, the clamping operation is convenient, and the installation and disassembly efficiency is high. Figure 13 、 Figure 14 and Figure 15As shown, the fixing member 34 of the second wire balun 3 includes a fixing member base 341, and the fixing member base 341 is provided with a first card slot 342, a second card slot 343 and a third card slot 344. The feeding wire 31 is clamped in the first card slot 342, the first reference ground wire 32 is clamped in the second card slot 343, and the second reference ground wire 33 is clamped in the third card slot 344. In this way, the relative positions of the feed wire 31, the first reference ground wire 32, and the second reference ground wire 33 are fixed by the fixing member base 341 and the first clamping slot 342, the second clamping slot 343, and the third clamping slot 344 provided on the fixing member base 341, and the connections between the fixing member base 341 and the feed wire 31, between the fixing member base 341 and the first reference ground wire 32, and between the fixing member base 341 and the second reference ground wire 33 are detachable. Therefore, when any one of the fixing member base 341, the feed wire 31, the first reference ground wire 32, and the second reference ground wire 33 is damaged, the damaged component can be removed for repair or replacement. Therefore, the repair cost is low, the clamping operation is convenient, and the installation and disassembly efficiency is high.

[0069] In some embodiments, as Figure 6 and Figure 7 As shown, or as Figure 14 and Figure 15 As shown, the fixing member 24 of the first wire balun 2 and the fixing member 34 of the second wire balun 3 are integrally formed, so that the number of components included in the radiation device can be reduced, the installation efficiency can be improved, and the production cost can be saved.

[0070] In order to demonstrate the advantages of the coplanar balun composed of the first wire balun 2 and the second wire balun 3 in the first embodiment, Figure 3 The radiation patterns of the radiation device shown are simulated when working at low frequency (690MHz), medium frequency (825MHz) and high frequency (960MHz) in the low frequency band (690MHz to 960MHz). The results are as follows Figure 12 As shown by Figure 12 It can be seen that Figure 3 The radiation pattern of the radiation device shown at the low, medium and high frequency points in the low frequency band is stable and consistent, without any abnormal changes, and is no different from the radiation pattern of the radiation device using a conventional non-coplanar balun. However, the coplanar balun used in this application takes up less space in structure.

[0071] Example 2, as Figure 16 and Figure 17As shown, the first wire balun 2′ includes a feeding wire 21′, a reference ground wire 22′ and a fixing member 23′, and the fixing member 23′ is used to fix the relative positions of the feeding wire 21′ and the reference ground wire 22′; the feeding wire 21′ extends in a vertical direction, the lower end of the feeding wire 21′ is a signal input end, and the upper end of the feeding wire 21′ is a first signal output end; the reference ground wire 22′ is parallel to the feeding wire 21′, and a capacitive coupling effect can be generated between the reference ground wire 22′ and the feeding wire 21′, the lower end of the reference ground wire 22′ is a reference ground connection end, and the upper end of the reference ground wire 22′ is a second signal output end; the second wire balun 3′ includes a feeding wire 31′, a reference ground wire 32′ and a fixing member 33′, and the fixing member 33′ is used to fix the relative positions of the feeding wire 21′ and the reference ground wire 22′; The relative positions of the feeding wire 31′ and the reference ground wire 32′ are fixed; the feeding wire 31′ extends in the vertical direction, the lower end of the feeding wire 31′ is the signal input end, and the upper end of the feeding wire 31′ is the first signal output end; the reference ground wire 32′ is parallel to the feeding wire 31′, and a capacitive coupling effect can be generated between the reference ground wire 32′ and the feeding wire 31′, the lower end of the reference ground wire 32′ is the reference ground connection end, and the upper end of the reference ground wire 32′ is the second signal output end; the first signal output end and the second signal output end of the first wire balun 2′ are electrically connected to the first radiation unit and the second radiation unit respectively, and the first signal output end and the second signal output end of the second wire balun 3′ are electrically connected to the third radiation unit and the fourth radiation unit respectively. Thus, when an excitation signal (e.g., a current signal) is input from the signal input end of the first wire balun 2' to the feed wire 21', a differential signal can be output from the first signal output end at the upper end of the feed wire 21', the reference ground wire 22' is coupled to the feed wire 21', and another differential signal is output from the second signal output end at the upper end of the reference ground wire 22'. Similarly, when an excitation signal (e.g., a current signal) is input from the signal input end of the second wire balun 3' to the feed wire 31', a differential signal can be output from the first signal output end at the upper end of the feed wire 31', the reference ground wire 32' is coupled to the feed wire 31', and another differential signal is output from the second signal output end at the upper end of the reference ground wire 32'. The first wire balun 2' and the second wire balun 3' have a simple structure and low cost.

[0072] In some embodiments, as Figure 18 or Figure 19As shown, the reference ground wire 22' of the first wire balun 2' includes a first reference ground wire unit 221' and a second reference ground wire unit 222' extending in the vertical direction. The upper end of the first reference ground wire unit 221' is electrically connected to the upper end of the second reference ground wire unit 222', and the lower end of the first reference ground wire unit 221' is electrically connected to the lower end of the second reference ground wire unit 222'. The first reference ground wire unit 221' and the second reference ground wire unit 222' are symmetrically arranged with respect to the feed wire 21'. Figure 18 or Figure 19 As shown, the reference ground conductor 32′ of the second conductor balun 3′ includes a first reference ground conductor unit 321′ and a second reference ground conductor unit 322′ extending in a vertical direction. The upper end of the first reference ground conductor unit 321′ is electrically connected to the upper end of the second reference ground conductor unit 322′, and the lower end of the first reference ground conductor unit 321′ is electrically connected to the lower end of the second reference ground conductor unit 322′. The first reference ground conductor unit 321′ and the second reference ground conductor unit 322′ are symmetrically arranged with respect to the feed conductor 31′. In this way, the symmetry of the directivity pattern can be increased.

[0073] In the above embodiment, the upper end of the first reference ground wire unit 221′ of the first wire balun 2′ can be electrically connected to the upper end of the second reference ground wire unit 222′ through a wire, a flexible circuit board or a metallized via, and the upper end of the first reference ground wire unit 321′ of the second wire balun 3′ can be electrically connected to the upper end of the second reference ground wire unit 322′ through a wire, a flexible circuit board or a metallized via, which is not specifically limited here.

[0074] In some embodiments, as Figure 18As shown, the fixing part 23′ of the first wire balun 2′ is a fourth insulating substrate arranged vertically, the feeding wire 21′, the first reference ground wire unit 221′ and the second reference ground wire unit 222′ are metal layers arranged on one surface of the fourth insulating substrate, and a first connecting wire 24′ is provided on the other surface of the fourth insulating substrate. One end of the first connecting wire 24′ is opposite to the upper end of the first reference ground wire unit 221′ and is electrically connected through a metallized via 26a′ arranged in the fourth insulating substrate, and the other end of the first connecting wire 24′ is opposite to the upper end of the second reference ground wire unit 222′ and is electrically connected through a metallized via 26b′ arranged in the fourth insulating substrate. In this way, the electrical connection between the upper end of the first reference ground wire unit 221′ and the upper end of the second reference ground wire unit 222′ of the first wire balun 2′ is realized through the first connecting wire 24′, the metallized via 26a′ and the metallized via 26b′. The fixing part 33′ of the second wire balun 3′ is a fourth insulating substrate arranged vertically, and the feeding wire 31′, the first reference ground wire unit 321′ and the second reference ground wire unit 322′ are metal layers arranged on one surface of the fourth insulating substrate. A first connecting wire 34′ is provided on the other surface of the fourth insulating substrate. One end of the first connecting wire 34′ is opposite to the upper end of the first reference ground wire unit 321′ and is electrically connected through a metallized via 36a′ arranged in the fourth insulating substrate. The other end of the first connecting wire 34′ is opposite to the upper end of the second reference ground wire unit 322′ and is electrically connected through a metallized via 36b′ arranged in the fourth insulating substrate. In this way, the electrical connection between the upper end of the first reference ground wire unit 321′ and the upper end of the second reference ground wire unit 322′ of the first wire balun 3′ is realized through the first connecting wire 34′, the metallized via 36a′ and the metallized via 36b′.

[0075] In other embodiments, Figure 19As shown, the fixing member 23′ of the first wire balun 2′ includes a fifth insulating substrate 231′ and a sixth insulating substrate 232′ arranged vertically. The fifth insulating substrate 231′ and the sixth insulating substrate 232′ are stacked and relatively fixed. The feeding wire 21′ is arranged on the surface of the fifth insulating substrate 231′ close to the sixth insulating substrate 232′, or the feeding wire 21′ is arranged on the surface of the sixth insulating substrate 232′ close to the fifth insulating substrate 231′. The first reference ground wire unit 221′ is arranged on the surface of the fifth insulating substrate 231′ away from the sixth insulating substrate 232′, and the second reference ground wire unit 222′ is arranged on the surface of the sixth insulating substrate 232′ away from the fifth insulating substrate 231′. The upper end of the first reference ground wire unit 221′ is electrically connected to the upper end of the second reference ground wire unit 222′ via a metallized via 27a′ and a metallized via 27b′ arranged in the fifth insulating substrate 231′ and the sixth insulating substrate 232′. The fixing part 33′ of the second wire balun 3′ includes a fifth insulating substrate 331′ and a sixth insulating substrate 332′ arranged vertically. The fifth insulating substrate 331′ and the sixth insulating substrate 332′ are stacked and relatively fixed. The feeding wire 31′ is arranged on the surface of the fifth insulating substrate 331′ close to the sixth insulating substrate 332′, or the feeding wire 31′ is arranged on the surface of the sixth insulating substrate 332′ close to the fifth insulating substrate 331′. The first reference ground wire unit 321′ is arranged on the surface of the fifth insulating substrate 331′ away from the sixth insulating substrate 332′, and the second reference ground wire unit 322′ is arranged on the surface of the sixth insulating substrate 332′ away from the fifth insulating substrate 331′. The upper end of the first reference ground wire unit 321′ and the upper end of the second reference ground wire unit 322′ are electrically connected through the metallized via 37a′ and the metallized via 37b′ arranged in the fifth insulating substrate 331′ and the sixth insulating substrate 332′.

[0076] The lower end of the first reference ground wire unit 221′ of the first wire balun 2′ can be electrically connected to the lower end of the second reference ground wire unit 222′ through a wire, a flexible circuit board or a metallized via, and the lower end of the first reference ground wire unit 321′ of the second wire balun 3′ can be electrically connected to the lower end of the second reference ground wire unit 322′ through a wire, a flexible circuit board or a metallized via, which is not specifically limited here.

[0077] In some embodiments, as Figure 18As shown, the fixing part 23′ of the first wire balun 2′ is a fourth insulating substrate arranged vertically, the feeding wire 21′, the first reference ground wire unit 221′ and the second reference ground wire unit 222′ are metal layers arranged on one surface of the fourth insulating substrate, and a second connecting wire 25′ is provided on the other surface of the fourth insulating substrate. One end of the second connecting wire 25′ is opposite to the lower end of the first reference ground wire unit 221′ and is electrically connected through a metallized via 26c′ arranged in the fourth insulating substrate, and the other end of the second connecting wire 25′ is opposite to the lower end of the second reference ground wire unit 222′ and is electrically connected through a metallized via 26d′ arranged in the fourth insulating substrate. In this way, the electrical connection between the lower end of the first reference ground wire unit 221′ and the lower end of the second reference ground wire unit 222′ of the first wire balun 2′ is realized through the second connecting wire 25′, the metallized via 26c′ and the metallized via 26d′. The fixing part 33′ of the second wire balun 3′ is a fourth insulating substrate arranged vertically, and the feeding wire 31′, the first reference ground wire unit 321′ and the second reference ground wire unit 322′ are metal layers arranged on one surface of the fourth insulating substrate. A second connecting wire 35′ is provided on the other surface of the fourth insulating substrate. One end of the second connecting wire 35′ is opposite to the lower end of the first reference ground wire unit 321′ and is electrically connected through a metallized via 36c′ arranged in the fourth insulating substrate. The other end of the second connecting wire 35′ is opposite to the lower end of the second reference ground wire unit 322′ and is electrically connected through a metallized via 36d′ arranged in the fourth insulating substrate. In this way, the electrical connection between the lower end of the first reference ground wire unit 321′ and the lower end of the second reference ground wire unit 322′ of the first wire balun 3′ is realized through the second connecting wire 35′, the metallized via 36c′ and the metallized via 36d′.

[0078] In other embodiments, Figure 19As shown, the fixing member 23′ of the first wire balun 2′ includes a fifth insulating substrate 231′ and a sixth insulating substrate 232′ arranged vertically. The fifth insulating substrate 231′ and the sixth insulating substrate 232′ are stacked and relatively fixed. The feeding wire 21′ is arranged on the surface of the fifth insulating substrate 231′ close to the sixth insulating substrate 232′, or the feeding wire 21′ is arranged on the surface of the sixth insulating substrate 232′ close to the fifth insulating substrate 231′. The first reference ground wire unit 221′ is arranged on the surface of the fifth insulating substrate 231′ away from the sixth insulating substrate 232′, and the second reference ground wire unit 222′ is arranged on the surface of the sixth insulating substrate 232′ away from the fifth insulating substrate 231′. The lower end of the first reference ground wire unit 221′ is electrically connected to the lower end of the second reference ground wire unit 222′ via a metallized via 27c′ and a metallized via 27d′ arranged in the fifth insulating substrate 231′ and the sixth insulating substrate 232′. The fixing part 33′ of the second wire balun 3′ includes a fifth insulating substrate 331′ and a sixth insulating substrate 332′ arranged vertically. The fifth insulating substrate 331′ and the sixth insulating substrate 332′ are stacked and relatively fixed. The feeding wire 31′ is arranged on the surface of the fifth insulating substrate 331′ close to the sixth insulating substrate 332′, or the feeding wire 31′ is arranged on the surface of the sixth insulating substrate 332′ close to the fifth insulating substrate 331′. The first reference ground wire unit 321′ is arranged on the surface of the fifth insulating substrate 331′ away from the sixth insulating substrate 332′, and the second reference ground wire unit 322′ is arranged on the surface of the sixth insulating substrate 332′ away from the fifth insulating substrate 331′. The lower end of the first reference ground wire unit 321′ and the lower end of the second reference ground wire unit 322′ are electrically connected through the metallized via 37c′ and the metallized via 37d′ arranged in the fifth insulating substrate 331′ and the sixth insulating substrate 332′.

[0079] The multiple wires (including the feed wire 21′, the first reference ground wire unit 221′ and the second reference ground wire unit 222′) included in the first wire balun 2′ can be arranged in one plane or in three parallel and opposite planes, which is not specifically limited here. When the feed wire 21′, the first reference ground wire unit 221′ and the second reference ground wire unit 222′ included in the first wire balun 2′ are arranged in one plane, as shown in FIG. Figure 18As shown, the feed wire 21′, the first reference ground wire unit 221′, and the second reference ground wire unit 222′ of the first wire balun 2′ are all strip wires. The feed wire 21′, the first reference ground wire unit 221′, and the second reference ground wire unit 222′ are arranged in the same plane. The structure of this first wire balun 2′ is simple and easy to manufacture. When the feed wire 21′, the first reference ground wire unit 221′, and the second reference ground wire unit 222′ included in the first wire balun 2′ are arranged in three parallel and opposite planes, optionally, as shown in FIG. Figure 19 As shown, the feed conductor 21′, first reference ground conductor unit 221′, and second reference ground conductor unit 222′ of the first conductor balun 2′ are all strip conductors. The plane in which the feed conductor 21′ lies is the third plane, the plane in which the first reference ground conductor unit 221′ lies is the fourth plane, and the plane in which the second reference ground conductor unit 222′ lies is the fifth plane. The fourth and fifth planes are located on opposite sides of the third plane, and are both parallel to and opposite to the third plane. This structure of the first conductor balun 2′ disperses the feed conductor 21′, first reference ground conductor unit 221′, and second reference ground conductor unit 222′ of the first conductor balun 2′ in three planes, which helps reduce the width of the first conductor balun 2′, thereby further reducing the space occupied by the first conductor balun 2′.

[0080] The plurality of wires included in the second wire balun 3′ (including the feed wire 31′, the first reference ground wire unit 321′ and the second reference ground wire unit 322′) can be arranged in one plane or in three parallel and opposite planes, which is not specifically limited here. When the feed wire 31′, the first reference ground wire unit 321′ and the second reference ground wire unit 322′ included in the second wire balun 3′ are arranged in one plane, as shown in FIG. Figure 18 As shown, the feed wire 31′, the first reference ground wire unit 321′, and the second reference ground wire unit 322′ of the second wire balun 3′ are all strip wires. The feed wire 31′, the first reference ground wire unit 321′, and the second reference ground wire unit 322′ are arranged in the same plane. The structure of this second wire balun 3′ is simple and easy to manufacture. When the feed wire 31′, the first reference ground wire unit 321′, and the second reference ground wire unit 322′ included in the second wire balun 3′ are arranged in three parallel and opposite planes, it is optional, such as Figure 19As shown, the feed conductor 31′, first reference ground conductor unit 321′, and second reference ground conductor unit 322′ of the second conductor balun 3′ are all strip conductors. The feed conductor 31′ is located in the eighth plane, the first reference ground conductor unit 321′ is located in the ninth plane, and the second reference ground conductor unit 322′ is located in the tenth plane. The ninth and tenth planes are located on opposite sides of the eighth plane, and are both parallel to and opposite the eighth plane. This structure of the second conductor balun 3′ disperses the feed conductor 31′, first reference ground conductor unit 321′, and second reference ground conductor unit 322′ of the second conductor balun 3′ in three planes, which helps reduce the width of the second conductor balun 3′, thereby further reducing the space occupied by the second conductor balun 3′.

[0081] It should be noted that in order to make the first wire balun 2′ and the second wire balun 3′ coplanar, the third plane is coplanar with the eighth plane, the fourth plane is coplanar with the ninth plane, and the fifth plane is coplanar with the tenth plane; or, the third plane is coplanar with the eighth plane, the fourth plane is coplanar with the tenth plane, and the fifth plane is coplanar with the ninth plane.

[0082] In some embodiments, as Figure 18 or Figure 19 As shown, the fixing member 23 ′ of the first wire balun 2 ′ and the fixing member 33 ′ of the second wire balun 3 ′ are integrally formed, thereby reducing the number of components included in the radiation device, improving installation efficiency, and saving manufacturing costs.

[0083] In some embodiments, as Figure 3 As shown, the radiation device further includes a substrate 4, which is mechanically connected to the lower ends of the first wire balun 2 and the second wire balun 3, as shown in FIG. Figure 10 and Figure 11 As shown, substrate 4 includes a reference ground 42, a first feed terminal 43, and a second feed terminal 44, which are isolated from each other. The reference ground connection ends of first-wire balun 2 and second-wire balun 3 are both electrically connected to reference ground 42. The signal input end of first-wire balun 2 is electrically connected to first feed terminal 43, and the signal input end of second-wire balun 3 is electrically connected to second feed terminal 44. Thus, substrate 4 can support first-wire balun 2, second-wire balun 3, and radiation module 1, and first feed terminal 43 and second feed terminal 44 are disposed on substrate 4, facilitating access to feed cables.

[0084] In the above embodiment, the reference ground connection terminal of the first wire balun 2 and the reference ground connection terminal of the second wire balun 3 and the reference ground 42, the signal input terminal of the first wire balun 2 and the first feeding terminal 43, and the signal input terminal of the second wire balun 3 and the second feeding terminal 44 can be electrically connected by wire connection, flexible circuit board connection, welding, etc., which are not specifically limited here. In some embodiments, such as Figure 7 As shown, the reference ground connection end of the first wire balun 2 is provided with a ninth pad 22b, the reference ground connection end of the second wire balun 3 is provided with a tenth pad 32b, the signal input end of the first wire balun 2 is provided with an eleventh pad 21a, and the signal input end of the second wire balun 3 is provided with a twelfth pad 31a. Figure 11 As shown, a thirteenth pad 46c, a fourteenth pad 46d, a fifteenth pad 46a and a sixteenth pad 46b are provided on the substrate 4. The thirteenth pad 46c and the fourteenth pad 46d are both electrically connected to the reference ground, the fifteenth pad 46a is electrically connected to the first feeding terminal 43 through a metallized via, the sixteenth pad 46b is electrically connected to the second feeding terminal 44 through a metallized via, the ninth pad 22b is welded to the thirteenth pad 46c, the tenth pad 32b is welded to the fourteenth pad 46d, the eleventh pad 21a is welded to the fifteenth pad 46a, and the twelfth pad 31a is welded to the sixteenth pad 46b.

[0085] To facilitate welding operations, the thirteenth welding pad 46c, the fourteenth welding pad 46d, the fifteenth welding pad 46a and the sixteenth welding pad 46b are arranged on the same surface of the substrate 4. In this way, during welding, welding operations on the four welding pads can be performed without turning over the substrate 4.

[0086] The first wire balun 2 and the substrate 4, as well as the second wire balun 3 and the substrate 4, can be mechanically connected by plugging, threading or welding, which is not specifically limited here. Figure 10 As shown, the base 4 is provided with a second plug hole 45, as shown in FIG. Figure 6 As shown, the lower ends of the first wire balun 2 and the second wire balun 3 are provided with a second plug-in protrusion 6, and the second plug-in protrusion 6 is plugged into the second plug-in hole 45, thereby realizing the mechanical connection between the first wire balun 2 and the substrate 4, and between the second wire balun 3 and the substrate 4. In terms of plug-in operation, the installation efficiency is relatively high.

[0087] In some embodiments, as Figure 3 、 Figure 10 and Figure 11As shown, the base 4 further includes a horizontally disposed second insulating substrate 41, the reference ground 42 is a metal layer disposed on one of the upper and lower surfaces of the second insulating substrate 41, and the first feed terminal 43 and the second feed terminal 44 are metal layers disposed on the other of the upper and lower surfaces of the second insulating substrate 41. Thus, the first feed terminal 43, the second feed terminal 44, and the reference ground 42 are isolated by the second insulating substrate 41, and the reference ground 42, the first feed terminal 43, and the second feed terminal 44 can be formed on the second insulating substrate 41 using a mature printing process, making it easy to manufacture.

[0088] In other embodiments, Figure 13 、 Figure 14 and Figure 15 As shown, substrate 4 includes a first coaxial feed line 4a and a second coaxial feed line 4b. First coaxial feed line 4a is located below first conductor balun 2, and second coaxial feed line 4b is located below second conductor balun 3. The reference ground is the outer conductor of first coaxial feed line 4a and the outer conductor of second coaxial feed line 4b. The first feed terminal is the inner conductor of first coaxial feed line 4a, and the second feed terminal is the inner conductor of second coaxial feed line 4b. This structure is simple and easy to implement.

[0089] In some embodiments, as Figure 4 As shown, the radiation module 1 further includes a horizontally disposed third insulating substrate 11, and the first radiation element 12a, the second radiation element 12b, the third radiation element 12c, and the fourth radiation element 12d are formed as a metal layer disposed on the upper surface of the third insulating substrate 11. This structure of the radiation module 1 is compact, and the first radiation element 12a, the second radiation element 12b, the third radiation element 12c, and the fourth radiation element 12d can be formed on the third insulating substrate 11 using a mature printing process, making it easy to manufacture.

[0090] Second, as Figure 20 and Figure 21 As shown, an embodiment of the present application provides a multi-band array antenna, including a reflector 100 and a radiation device array arranged on the reflector 100, the radiation device array including a first radiation device 200 and a second radiation device 300 arranged adjacent to each other, the operating frequency band of the first radiation device 200 is higher than the operating frequency band of the second radiation device 300, and the second radiation device 300 is a radiation device as described in any of the above technical solutions.

[0091] The multi-band array antenna provided in the embodiment of the present application is as follows: Figure 20 and Figure 21As shown, since the multi-band array antenna includes a reflector 100 and a radiation device array arranged on the reflector 100, the radiation device array includes a first radiation device 200 and a second radiation device 300 arranged adjacent to each other, the operating frequency band of the first radiation device 200 is higher than the operating frequency band of the second radiation device 300, so the volume of the first radiation device 200 is smaller than the volume of the second radiation device 300, and the baluns of the first radiation device 200 and the second radiation device 300 are flush. Since the second radiation device 300 is a radiation device as described in any of the above technical solutions, the first wire balun and the second wire balun of the second radiation device 300 are coplanarly arranged, and the balun structure composed of the first wire balun and the second wire balun occupies a smaller space, which is conducive to reducing the distance between the first radiation device 200 and the second radiation device 300. Therefore, more radiation devices can be integrated without increasing or increasing the size of the multi-band array antenna.

[0092] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A radiation device, characterized in that: It includes a radiation module, a first balun and a second balun; The radiation module includes a first radiation unit and a second radiation unit with a polarization direction of +45°, and a third radiation unit and a fourth radiation unit with a polarization direction of -45°; The first balun and the second balun are arranged in the same plane; the first balun and the second balun each include a feeding wire and a reference ground wire; the feeding wire and the reference ground wire are coupled; At least two of the feeding wire of the first balun, the feeding wire of the second balun, the reference ground wire of the first balun, and the reference ground wire of the second balun are located in the same plane.

2. The radiation device according to claim 1, characterized in that The first balun is used to feed a first differential signal to the first radiation unit and the second radiation unit, and the second balun is used to feed a second differential signal to the third radiation unit and the fourth radiation unit.

3. The radiation device according to claim 1 or 2, characterized in that: The first radiation unit, the second radiation unit, the third radiation unit, and the fourth radiation unit are isolated from each other.

4. The radiation device according to any one of claims 1 to 3, characterized in that: The reference ground wire includes a first reference ground wire and a second reference ground wire.

5. The radiation device according to claim 4, characterized in that The first balun and the second balun each include a fixing member, and the fixing member is used to fix the relative positions of the feeding wire, the first reference ground wire, and the second reference ground wire.

6. The radiation device according to claim 4 or 5, characterized in that The feed wire includes a first feed wire segment and a second feed wire segment extending in a vertical direction, the first feed wire segment is parallel to the second feed wire segment, the lower end of the first feed wire segment is a signal input end, and the upper end of the second feed wire segment is electrically connected to the upper end of the first feed wire segment.

7. The radiation device according to any one of claims 4 to 6, characterized in that: The first reference ground wire is parallel to the first feeding wire segment, the lower end of the first reference ground wire is a reference ground connection end, and the upper end of the first reference ground wire is a first signal output end; The second reference ground wire is parallel to the second feeding wire segment, the lower end of the second reference ground wire is a reference ground connection end, and the upper end of the second reference ground wire is a second signal output end; The first signal output terminal and the second signal output terminal of the first balun are electrically connected to the first radiation unit and the second radiation unit respectively, and the first signal output terminal and the second signal output terminal of the second balun are electrically connected to the third radiation unit and the fourth radiation unit respectively.

8. The radiation device according to any one of claims 4 to 7, characterized in that: When the radiation device is working, A capacitive coupling effect is generated between the first reference ground wire and the first feeding wire segment, and a capacitive coupling effect is generated between the second reference ground wire and the second feeding wire segment.

9. The radiation device according to any one of claims 4 to 8, characterized in that: The feed wire further includes a third feed wire segment, which extends in a horizontal direction. One end of the third feed wire segment is electrically connected to the upper end of the first feed wire segment, and the other end of the third feed wire segment is electrically connected to the upper end of the second feed wire segment.

10. The radiation device according to any one of claims 4 to 9, characterized in that: The first feeding wire segment and the second feeding wire segment are located in the same plane, and the plane in which the first feeding wire segment and the second feeding wire segment are located is a first plane. The first reference ground wire and the second reference ground wire are located in the same plane, and the plane in which the first reference ground wire and the second reference ground wire are located is a second plane. The first plane is parallel to the second plane.

11. The radiation device according to claim 10, characterized in that The first plane is parallel to and opposite to the second plane.

12. The radiation device according to any one of claims 4 to 9, characterized in that: The feeding wire, the first reference ground wire and the second reference ground wire are located in the same plane.

13. The radiation device according to any one of claims 5 to 12, characterized in that: The fixing member is a first insulating substrate arranged vertically, and the feeding wire, the first reference ground wire and the second reference ground wire are all metal layers arranged on the first insulating substrate.

14. The radiation device according to any one of claims 5 to 13, characterized in that The fixing member includes a fixing member base, and the fixing member base is provided with a first card slot, a second card slot and a third card slot. The feeding wire is clamped in the first card slot, the first reference ground wire is clamped in the second card slot, and the second reference ground wire is clamped in the third card slot.

15. The radiation device according to any one of claims 1 to 3, characterized in that: The first balun and the second balun each include a fixing member, and the fixing member is used to fix the relative position of the feeding wire and the reference ground wire.

16. The radiation device according to claim 15, characterized in that The feed wire extends in a vertical direction, the lower end of the feed wire is a signal input end, and the upper end of the feed wire is a first signal output end; The reference ground wire is parallel to the feeding wire, the lower end of the reference ground wire is a reference ground connection end, and the upper end of the reference ground wire is a second signal output end; The first signal output terminal and the second signal output terminal of the first balun are electrically connected to the first radiation unit and the second radiation unit respectively, and the first signal output terminal and the second signal output terminal of the second balun are electrically connected to the third radiation unit and the fourth radiation unit respectively.

17. The radiation device according to claim 15 or 16, characterized in that When the radiation device is working, a capacitive coupling effect is generated between the reference ground wire and the feeding wire.

18. The radiation device according to any one of claims 15 to 17, characterized in that The reference ground wire includes a first reference ground wire unit and a second reference ground wire unit extending in a vertical direction, the upper end of the first reference ground wire unit is electrically connected to the upper end of the second reference ground wire unit, the lower end of the first reference ground wire unit is electrically connected to the lower end of the second reference ground wire unit, and the first reference ground wire unit and the second reference ground wire unit are symmetrically arranged with respect to the feeding wire.

19. The radiation device according to claim 18, characterized in that The feeding wire, the first reference ground wire unit and the second reference ground wire unit are all strip wires, and the feeding wire, the first reference ground wire unit and the second reference ground wire unit are arranged in the same plane.

20. The radiation device according to claim 18, characterized in that The feeding wire, the first reference ground wire unit and the second reference ground wire unit are all strip wires, the plane where the feeding wire is located is the third plane, the plane where the first reference ground wire unit is located is the fourth plane, and the plane where the second reference ground wire unit is located is the fifth plane, the fourth plane and the fifth plane are respectively located on opposite sides of the third plane, and the fourth plane and the fifth plane are both parallel to the third plane.

21. The radiation device according to claim 20, characterized in that The fourth plane and the fifth plane are both parallel to and opposite to the third plane.

22. The radiation device according to claim 4 or 15, characterized in that The radiation device further includes a substrate, the substrate being mechanically connected to lower ends of the first balun and the second balun, the substrate including a reference ground, a first feeding terminal, and a second feeding terminal, the reference ground, the first feeding terminal, and the second feeding terminal being isolated from each other; The reference ground connection end of the first balun and the reference ground connection end of the second balun are both electrically connected to the reference ground, the signal input end of the first balun is electrically connected to the first feed terminal, and the signal input end of the second balun is electrically connected to the second feed terminal.

23. The radiation device according to claim 22, characterized in that The base also includes a second insulating substrate arranged horizontally, the reference ground is a metal layer arranged on one of the upper surface and the lower surface of the second insulating substrate, and the first feeding terminal and the second feeding terminal are metal layers arranged on the other of the upper surface and the lower surface of the second insulating substrate.

24. The radiation device according to claim 22, characterized in that The substrate includes a first coaxial feed line and a second coaxial feed line, the first coaxial feed line is located below the first balun, and the second coaxial feed line is located below the second balun, the reference ground is the outer conductor of the first coaxial feed line and the outer conductor of the second coaxial feed line, the first feed terminal is the inner conductor of the first coaxial feed line, and the second feed terminal is the inner conductor of the second coaxial feed line.

25. The radiation device according to any one of claims 1 to 22, characterized in that The radiation module includes a third insulating substrate arranged horizontally, and the first radiation unit, the second radiation unit, the third radiation unit and the fourth radiation unit are metal layers arranged on an upper surface of the third insulating substrate.

26. The radiation device according to claim 1, characterized in that The feeding wires of the first balun and the feeding wires of the second balun are located in the same plane.

27. The radiation device according to claim 1 or 26, characterized in that The reference ground wire of the first balun and the reference ground wire of the second balun are located in the same plane.

28. The radiation device according to claim 1, characterized in that The feeding wire of the first balun and the reference ground wire of the second balun are located in the same plane.

29. The radiation device according to claim 1 or 28, characterized in that The reference ground wire of the first balun and the feeding wire of the second balun are located in the same plane.

30. The radiation device according to claim 1, characterized in that The feeding wire of the first balun and the reference ground wire of the first balun are located in the same plane.

31. The radiation device according to claim 1 or 30, characterized in that The feeding wire of the second balun and the reference ground wire of the second balun are located in the same plane.

32. The radiation device according to claim 1, characterized in that The feeding wire of the first balun, the reference ground wire of the first balun, the feeding wire of the second balun, and the reference ground wire of the second balun are located in the same plane.

33. The radiation device according to claim 1, characterized in that The first balun and the second balun each include a fixing member, wherein the fixing member includes a fourth insulating substrate; The feed wire, the first reference ground wire unit, and the second reference ground wire unit are a metal layer provided on one surface of a fourth insulating substrate. A first connecting wire is provided on another surface of the fourth insulating substrate. One end of the first connecting wire is opposite to the upper end of the first reference ground wire unit and is electrically connected through a metallized via provided in the fourth insulating substrate. The other end of the first connecting wire is opposite to the upper end of the second reference ground wire unit and is electrically connected through a metallized via provided in the fourth insulating substrate. The metallized via connected to the upper end of the first reference ground conductor is different from the metallized via connected to the upper end of the first reference ground conductor.

34. The radiation device according to claim 25, characterized in that A seventh solder pad is provided on the radiation module; a fourth connecting wire is provided on the lower surface of the third insulating substrate; one end of the fourth connecting wire is electrically connected to the seventh solder pad through a metallized via provided in the third insulating substrate, and the other end of the fourth connecting wire is electrically connected to the third radiation unit through a metallized via provided in the third insulating substrate; the metallized via connected to the seventh solder pad is different from the metallized via connected to the third radiation unit.

35. The radiation device according to claim 22, characterized in that The signal input end of the first balun is provided with an eleventh pad, and the signal input end of the second balun is provided with a twelfth pad; A fifteenth pad and a sixteenth pad are provided on the substrate. The fifteenth pad is electrically connected to the first feed terminal through a metallized via, the sixteenth pad is electrically connected to the second feed terminal through a metallized via, the eleventh pad is welded to the fifteenth pad, and the twelfth pad is welded to the sixteenth pad.

36. The radiation device according to claim 22, characterized in that The second signal output end of the first balun is electrically connected to the second pad through a metallized via; the second signal output end of the second balun is electrically connected to the sixth pad through a metallized via.

37. An array antenna, characterized in that: It comprises an array of radiation devices, which includes a first radiation device and a second radiation device arranged adjacent to each other, wherein the first radiation device and the second radiation device have different operating frequency bands; the second radiation device is the radiation device according to any one of claims 1 to 36.

38. The array antenna according to claim 37, characterized in that: The operating frequency band of the first radiation device is higher than the operating frequency band of the second radiation device.

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