Antenna device and communication equipment

Abstract

An embodiment of the present application provides an antenna device and a communication device. The antenna device includes a reflector, a radiation unit, and a feeding network; the radiation unit is disposed on the reflector, and the radiation unit includes a balun and at least two radiation arms. The balun includes a first feeding layer, a common ground layer, and a second feeding layer arranged in sequence. The feeding network includes a phase shifter, and the phase shifter includes a feeding member; one end of the common ground layer is electrically connected to one of the radiation arms, and the other end of the common ground layer is electrically connected to the reflector, or the other end of the common ground layer is suspended on the reflector; one end of the first feeding layer and the second feeding layer is electrically connected to the other radiation arm, and the other end of the first feeding layer is electrically connected to the feeding member, and the feeding member and the first feeding layer are an integral part, which simplifies the connection process between the phase shifter of the feeding network and the balun of the radiation unit, thereby improving the assembly efficiency of the antenna device.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of communication antennas, and particularly to an antenna device and a communication device. Background Art

[0002] With the rapid development of wireless communication technology, the demand for the capacity of communication systems is increasing. Multi-Input Multi-Output (MIMO) technology and beamforming array antennas have emerged as the times require. Traditional base station array antennas include multiple radiation units and a feeding network. Among them, a phase shifter is provided in the feeding network. By electrically connecting the feeding network to each radiation unit, real-time variability of network coverage can be achieved, and at the same time, the signal phase is adjusted to achieve electrical downtilt of the array antenna.

[0003] In traditional array antennas, a radiation unit includes multiple radiation arms and two baluns arranged orthogonally. Each balun includes a common ground layer and feeding layers respectively located on both sides of the common ground layer. One end of the common ground layer of the two baluns is electrically connected to two of the radiation arms, one end of the feeding layers of the two baluns is electrically connected to the other two radiation arms, and the other ends of the feeding layers of the two baluns are electrically connected to the feeding member of the phase shifter. By providing a radio frequency current with a +45° polarization direction to one of the feeding layers of the two baluns and providing a radio frequency current with a -45° polarization direction to the other feeding layer of the two baluns, a radio frequency current with a dual polarization direction is formed on the radiation surface formed by the radiation arms.

[0004] However, in practical applications, the feeding member of the phase shifter is connected to the feeding layer of each balun by means such as welding, which makes the assembly between the feeding network and the radiation unit cumbersome and complex, thereby reducing the assembly efficiency of the base station array antenna. Summary of the Invention

[0005] The embodiments of the present application provide an antenna device and a communication device, which simplify the connection process between the phase shifter of the feeding network and the balun of the radiation unit, thereby improving the assembly efficiency of the antenna device.

[0006] The embodiments of the present application provide an antenna device, including a reflector, a radiation unit, and a feeding network;

[0007] The radiation unit is arranged on the reflector. The radiation unit includes a balun and at least two radiation arms located at one end of the balun. The balun includes a first feeding layer, a common ground layer, and a second feeding layer arranged in sequence, and the balun has only one common ground layer. The feeding network includes a phase shifter, and the phase shifter includes a feeding member;

[0008] One end of the common ground layer is electrically connected to one of the radiating arms, and the other end of the common ground layer is electrically connected to the reflector. Alternatively, the other end of the common ground layer is suspended on the reflector; one end of the first feeding layer and the second feeding layer is electrically connected to the other radiating arm, and the other end of the first feeding layer is electrically connected to the feeding element, and the feeding element and the first feeding layer are an integral part.

[0009] In the antenna device provided by the embodiment of the present application, the balun is arranged to include a first feeding layer, a common ground layer, and a second feeding layer that are sequentially spaced apart. One end of the first feeding layer and the second feeding layer is electrically connected to the other radiating arm, and the other end of the first feeding layer is electrically connected to the feeding element of the phase shifter. In this way, when the other end of the feeding element and the other end of the second feeding layer are both electrically connected to the corresponding RF signal ports, a dual-polarized RF signal transmission between the radiating arm and the RF signal port can be achieved through the balun. For example, in the embodiment of the present application, an RF current in the +45° polarization direction can be sequentially transmitted from the RF signal port to the feeding element of the phase shifter and the first feeding layer, and an RF current in the -45° polarization direction can be transmitted from the RF signal port to the second feeding layer, so that at least two radiating arms radiate electromagnetic wave signals in dual-polarized directions. At the same time, by electrically connecting the other end of the first feeding layer to the feeding element of the phase shifter, the phase of the output end of the first feeding layer can be changed by changing the dielectric layer resistance between the feeding element and the ground of the phase shifter. Furthermore, when the antenna device includes multiple radiating units, a phase difference is formed between the radiating arms of each radiating unit, thereby achieving electrical downtilt of the array antenna. By setting the feeding element of the phase shifter and the first feeding layer as an integral part, not only the phase adjustment effect on the output end of the first feeding layer is realized, but also the connection structure between the balun and the phase shifter is simplified, thereby simplifying the assembly process between the feeding network and the radiating unit, improving the assembly efficiency of the entire antenna device, and saving the manufacturing cost at the same time.

[0010] In an alternative implementation, the radiating unit has one balun. Compared with the prior art, the balun in the radiating unit of the embodiment of the present application not only realizes the dual-polarized feeding function, but also simplifies the structure of the radiating unit, thereby simplifying the assembly process of the entire radiating unit.

[0011] In an alternative implementation, there is a first air layer between the common ground layer and the first feeding layer, and a second air layer between the common ground layer and the second feeding layer;

[0012] There is a first air layer between the feeding element and the common ground layer.

[0013] In the embodiment of the present application, a first air layer is formed between the common ground layer and the first feeding layer of the balun, and a second air layer is formed between the common ground layer and the second feeding layer, so that the balun forms an air microstrip line structure, reducing the energy loss of the radio frequency signal caused by the dielectric layer of the balun and improving the radiation performance of the antenna device. At the same time, there is also a first air layer between the feeding member of the phase shifter and the common ground layer, so that the common ground layer of the balun also serves as the signal ground of the phase shifter. In this way, by changing the resistance of the first air layer, the phase adjustment of the output end of the first feeding layer can be realized, and the phase shifter also forms an air microstrip line structure, reducing the energy loss of the feeding network to the radio frequency signal. Therefore, not only the radiation performance of the entire antenna device is improved, but also the manufacturing cost of the balun and the phase shifter is saved.

[0014] In an optional implementation manner, the phase shifter further includes a sliding dielectric, and at least a part of the sliding dielectric is movably disposed on the side of the feeding member facing the common ground layer;

[0015] When the sliding dielectric slides relative to the common ground layer, at least a part of the sliding dielectric coincides with the first air layer.

[0016] In the embodiment of the present application, a sliding dielectric is provided in the phase shifter, and at least a part of the sliding dielectric is movably disposed on one side of the feeding member. In this way, by moving the sliding dielectric, at least a part of the sliding dielectric coincides with the first air layer to change the dielectric resistance of the first air layer, thereby realizing the stable adjustment of the phase of the output end of the first feeding layer.

[0017] In a feasible implementation manner, the common ground layer includes a first part and a second part. The first part extends in a direction perpendicular to the reflector, and the second part extends in a direction parallel to the reflector;

[0018] The first air layer includes a first horizontal air layer and a first vertical air layer that are interconnected. There is a first vertical air layer between the first feeding layer and the first part; the second air layer includes a second horizontal air layer and a second vertical air layer that are interconnected. There is a second vertical air layer between the second feeding layer and the first part;

[0019] There is a first horizontal air layer between the feeding member and the second part, and at least a part of the sliding dielectric coincides with the first horizontal air layer.

[0020] In the embodiment of the present application, the common ground layer is set to two parts. The first part is set to extend in a direction perpendicular to the reflector, and the second part is set to extend in a direction parallel to the reflector. A first vertical air layer is formed between the first feeding layer and the first part of the common ground layer, and a first horizontal air layer is formed between the feeding member of the phase shifter and the second part of the common ground layer. In this way, by moving the sliding medium to make it coincide with the first horizontal air layer, not only can the signal phase of the corresponding radiation unit be adjusted, but also the air microstrip line structures of the balun and the phase shifter are reasonably arranged, and the space of the antenna device in the direction perpendicular to the reflector is saved, thereby improving the structural stability between the feeding network and the radiation unit.

[0021] In a feasible implementation manner, the antenna device includes a plurality of radiation units, and the plurality of radiation units are arranged at intervals on the reflector.

[0022] Among them, among the plurality of radiation units arranged along the extending direction of the second part, the second parts of two adjacent common ground layers are an integral part.

[0023] In the embodiment of the present application, by arranging a plurality of radiation units at intervals on the reflector, the antenna device of the embodiment of the present application forms an array antenna, and by electrically connecting each radiation unit to the phase shifter of the feeding network, a phase difference is formed between the respective radiation units, thereby realizing the electrical downtilt of the array antenna. In addition, by setting the second parts of two adjacent common ground layers as an integral part, all the common ground layers of the antenna device are an integral part. In this way, while ensuring that each radiation unit of the antenna device is grounded, the structure of the radiation unit in the antenna device is simplified, thereby improving the assembly efficiency of the antenna device.

[0024] In a feasible implementation manner, the feeding network includes a first phase shifter and a second phase shifter. The first phase shifter includes a first feeding member, and the second phase shifter includes a second feeding member.

[0025] The first feeding member and the first feeding layer are an integral part, and there is a first air layer between the first feeding member and the common ground layer. The second feeding member and the second feeding layer are an integral part, and there is a second air layer between the second feeding member and the common ground layer.

[0026] In the embodiment of the present application, by setting two phase shifters, wherein the first phase shifter is used to change the phase of the output end of the first feeding layer, and the second phase shifter is used to change the phase of the output end of the second feeding layer, the signal phases of both polarization directions are adjusted. At the same time, by setting the feeding member of the first phase shifter and the first feeding layer as an integral part, and setting the feeding member of the second phase shifter and the second feeding layer as an integral part, the connection process between the two phase shifters and the balun is further simplified, thereby improving the assembly efficiency of the antenna device.

[0027] In a feasible implementation, the first feeding element is a first feeding sheet, and the second feeding element is a second feeding sheet; the first feeding sheet and the first feeding layer are located in a first plane, and the second feeding sheet and the second feeding layer are located in a second plane; both the first plane and the second plane are perpendicular to the reflector of the antenna device.

[0028] In the embodiment of the present application, by setting the feeding element as a feeding sheet, for example, setting the first feeding element as the first feeding sheet and the second feeding element as the second feeding sheet, and setting the feeding element and the corresponding feeding layer in the same plane, the manufacturing process of integrally forming the feeding element and the corresponding feeding layer is simplified, that is, the manufacturing difficulty of integrally forming the feeding element and the corresponding feeding layer is reduced, thereby improving the manufacturing efficiency of the antenna device. In addition, the first plane where the first feeding element is located and the second plane where the second feeding element is located are both perpendicular to the surface of the reflector, avoiding the coupling of the first feeding element and the second feeding element with the surface of the reflector respectively and affecting the transmission performance of the radio frequency signal.

[0029] In a feasible implementation, the antenna device further includes a conductive shell with an opening on one side, the reflector has a through hole, the conductive shell is embedded in the through hole, the opening faces the radiation arm, one end of the balun is connected to the radiation arm, and the other end of the balun is received in the conductive shell;

[0030] The other end of the common ground layer is electrically connected to the reflector, including: the other end of the common ground layer is electrically connected to the conductive shell, and the conductive shell is electrically connected to the reflector.

[0031] In the embodiment of the present application, by embedding a conductive shell in the through hole of the reflector and receiving a part of the balun in the conductive shell, a part of the electromagnetic wave signal radiated by the balun itself can be blocked by the conductive shell and will not leak to the outside, thereby reducing the loss of the balun during the transmission of the radio frequency signal. Especially when the phase shifter part at one end of the balun is received in the conductive shell, the loss of the phase shifter during the transmission of the radio frequency signal is further reduced, and the accuracy of the phase adjustment by the phase shifter is improved. At the same time, by electrically connecting the conductive shell to the reflector and connecting one end of the common ground layer of the balun to the conductive shell, the electrical connection between the common ground layer and the reflector is realized, thereby ensuring that the common ground layer is grounded.

[0032] In a feasible implementation, the balun includes an insulating body and three layers of sheet metal;

[0033] The three layers of sheet metal are arranged at intervals, and there is an insulating body between adjacent two layers of sheet metal, where,

[0034] The sheet metal in the middle is the common ground layer, and the sheet metals on both sides are the first feeding layer and the second feeding layer respectively.

[0035] In the embodiment of the present application, the balun is made of three-layer sheet metal. Compared with the manufacturing methods of printed circuit boards, cables, or the photolithography and etching process (PEP), the manufacturing cost of the balun structure is effectively saved, and at the same time, the manufacturing process of the balun is made simpler and faster.

[0036] In a feasible implementation, the number of radiation units is multiple, and the multiple radiation units are arranged in an array. The phase shifter includes multiple feeding members, and the multiple feeding members are correspondingly arranged with the baluns of the multiple radiation units one by one.

[0037] In the embodiment of the present application, the phase shifter is set to include multiple feeding members, and the multiple feeding members are connected to the baluns of the corresponding radiation units. In this way, the phase adjustment of multiple radiation units can be realized through one phase shifter. For example, a phase difference can be formed between multiple radiation units through one phase shifter, so as to realize the electrical downtilt of each radiation unit in the antenna device. This not only ensures the radiation performance of the antenna device, but also simplifies the structure of the feeding network, making the structural layout of the entire feeding network more concise and reliable.

[0038] The embodiment of the present application also provides a communication device, including a radio frequency circuit and the above antenna device.

[0039] For the communication device provided by the embodiment of the present application, by electrically connecting the above antenna device to the radio frequency circuit, the structure of the antenna device is simplified, the assembly efficiency of the entire antenna device is improved, and the manufacturing cost is saved at the same time. Description of the Drawings

[0040] Figure 1 is a partial structural schematic diagram of a traditional base station array antenna;

[0041] Figure 2 is Figure 1 the internal structural schematic diagram of one of the baluns in

[0042] Figure 3 is a structural schematic diagram of one of the antenna devices provided by an embodiment of the present application;

[0043] Figure 4 is Figure 3 the partial enlarged view at I in

[0044] Figure 5 is Figure 4 the top view of

[0045] Figure 6 is Figure 3 the left view of

[0046] Figure 7 is Figure 6Partial enlarged view at II in the figure;

[0047] Figure 8 is Figure 3 the right view of;

[0048] Figure 9 is Figure 3 the exploded view of;

[0049] Figure 10 is Figure 3 the partial enlarged view at III in the figure;

[0050] Figure 11 is the structural schematic diagram of another antenna device provided by an embodiment of the present application;

[0051] Figure 12 is Figure 11 the left view of;

[0052] Figure 13 is Figure 11 the partial enlarged view at IV in the figure;

[0053] Figure 14 is the structural schematic diagram of yet another antenna device provided by an embodiment of the present application;

[0054] Figure 15 is Figure 14 the right view of.

[0055] Explanation of reference numerals:

[0056] 1, 100 - Reflector; 2, 200 - Radiation element; 300 - Feeding network; 400 - Conductive shell; 500 - Gap;

[0057] 110 - Through hole; 200a - First radiation element; 200b - Second radiation element; 200c - Third radiation element; 22, 210 - Radiation arm; 21, 220 - Balun; 310 - Phase shifter; 320 - Main feeding line; 410 - Main body part; 420 - Connection part; 430 - Opening;

[0058] 22a, 211 - First radiation arm; 22b, 212 - Second radiation arm; 22c, 213 - Third radiation arm; 22d, 214 - Fourth radiation arm; 21a, 220a - First balun; 21b, 220b - Second balun; 220c - Third balun; 201, 221 - Common ground plane; 202, 222 - First feeding layer; 203, 223 - Second feeding layer; 224 - First air layer; 225 - Second air layer; 226 - Mounting part; 227 - Extension part; 3101 - First phase shifter; 3102 - Second phase shifter; 31, 311 - Feeding member; 312 - Sliding medium;

[0059] 2211 - The first part; 2212 - The second part; 2241 - The first vertical air layer; 2242 - The first horizontal air layer; 2251 - The second vertical air layer; 2252 - The second horizontal air layer; 226a - The first mounting part; 226b - The second mounting part; 3111 - The first feeding element; 3112 - The second feeding element; 3121 - The first sliding dielectric; 3122 - The second sliding dielectric. Detailed implementation manners

[0060] The terms used in the implementation manners part of this application are only used to explain the specific embodiments of this application, rather than being intended to limit this application.

[0061] Figure 1 It is a schematic diagram of a partial structure of a traditional base station array antenna. Refer to Figure 1 As shown, currently, a traditional base station array antenna mainly includes a feeding network ( Figure 1 The feeding element shown as 31 in Figure 1 is a part of the feeding network) and multiple radiation units 2 (

[0062] One radiation unit is shown in Figure 1 ). The multiple radiation units 2 are arranged in an array on one side of the reflector 1. By electrically connecting the feeding network to each radiation unit 2, real-time variability of network coverage is achieved to meet the continuous changes of the coverage scenario and optimize the network performance.

[0063] Among them, the first balun 21a and the second balun 21b are orthogonally arranged. The first radiation arm 22a and the second radiation arm 22b are respectively arranged at one end of the first balun 21a. Correspondingly, the third radiation arm 22c and the fourth radiation arm 22d are respectively arranged at one end of the second balun 21b. Among them, the first radiation arm 22a and the second radiation arm 22b can be used as the first dipole, and the third radiation arm 22c and the fourth radiation arm 22d are used as the second dipole.

[0064] Figure 2 is Figure 1 The internal structure schematic diagram of one of the baluns in Figure 2As shown, each balun 21 includes two feed layers and a common ground layer 201 located between the two feed layers. The two feed layers may be a first feed layer 202 and a second feed layer 203, wherein the first feed layer 202, the common ground layer 201 and the second feed layer 203 are arranged along the thickness direction of the balun 21 (see Figure 2 They are arranged in sequence at intervals (as shown in the z direction of the arrow).

[0065] Reference Figure 1 As shown, when set, one end of the common ground layer 201 of the first balun 21a is respectively connected to the first radiation arm 22a and the second radiation arm 22b, one end of the common ground layer 201 of the second balun 21b is respectively electrically connected to the third radiation arm 22c and the fourth radiation arm 22d, and the other ends of the two common ground layers 201 are both electrically connected to one surface of the reflector 1 to ensure that the radiation unit 2 is grounded.

[0066] Continue to refer to Figure 1 As shown, the feeding network includes a phase shifter, and the phase shifter has a feeding element 31. One end of the first feeding layer 202 of the first balun 21a is coupled and fed to the first radiating arm 22a, one end of the first feeding layer 202 of the second balun 21b is coupled and fed to the third radiating arm 22c, and the other ends of the two first feeding layers 202 are electrically connected to one end of the feeding element 31 of the phase shifter. The other end of the feeding element 31 of the phase shifter is electrically connected to the first RF signal port (not shown).

[0067] Correspondingly, the second feeding layer 203 of the first balun 21a is coupled and fed to the second radiating arm 22b, the second feeding layer 203 of the second balun 21b is coupled and fed to the fourth radiating arm 22d, and the other ends of the two second feeding layers 203 are electrically connected to the second RF signal port (not shown).

[0068] The following takes the case where the first RF signal port and the second RF signal port send RF currents in the +45° polarization direction and -45° polarization direction, respectively, as an example. In specific operation, the RF current in the +45° direction is input into the two first feeding layers 202 through the first RF signal port and the feeding element 31 of the phase shifter, and the RF current in the -45° direction is input into the two second feeding layers 203 through the second RF signal port, so that polarization components are generated in the extension direction of the first dipole and the extension direction of the second dipole, and finally RF signals with opposite polarization directions are excited at +45° and -45°, respectively, in the coordinate system formed by the first dipole and the second dipole.

[0069] In addition, by electrically connecting the feeding element of the phase shifter 31 at one end of the two first feeding layers 202, the phase of the output end of the two first feeding layers 202 is adjusted, thereby changing the phase of the output end of the radiation unit 2, and then forming a phase difference of the signal between the multiple radiation units 2, thereby realizing the electrical downtilt of the array antenna.

[0070] It should be noted that in the traditional technology, the signal ground of the phase shifter is the reflector 1. The feeding member 31 of the phase shifter is opposite to and spaced from the reflector 1. The feeding member 31, the reflector 1 and the dielectric layer between the feeding member 31 and the reflector 1 together form the signal transmission line of the phase shifter. When the phase shifter is working, by changing the resistance of the dielectric layer between the feeding member 31 and the reflector 1, the phase of the output end of the radiation unit 2 can be changed.

[0071] Generally, the feeding member 31 of the phase shifter and the two first feeding layers 202 are electrically connected by means of welding or the like. At the same time, since the main surface of the feeding member 31 is parallel to the reflector 1, and the main surface of the feeding layer of the balun 21, such as the first feeding layer 202, is perpendicular to the reflector 1, the feeding member 31 and the feeding layer are perpendicular to each other in different planes, which increases the welding difficulty between the feeding member 31 and the feeding layer. For example, the welding between the feeding member 31 and the first feeding layer 202 needs to rely on a mold and requires strict adjustment of welding parameters, etc. This makes the assembly between the phase shifter in the feeding network and the balun 21 in the radiation unit 2 cumbersome and complex, thus reducing the assembly efficiency of the base station array antenna.

[0072] Based on this, the embodiments of the present application provide an antenna device and a communication device. By setting the feeding layer of the balun and the feeding member of the phase shifter as an integral part, the integration of the electrically tunable feeding network and the radiation unit is realized, the assembly process between the feeding network and the radiation unit is simplified, and thus the assembly efficiency of the entire antenna device is improved.

[0073] The following will detail the specific structures of the antenna device and the communication device according to the embodiments of the present application.

[0074] Embodiment 1

[0075] Figure 3 It is a schematic structural diagram of one of the antenna devices provided by an embodiment of the present application. Refer to Figure 1 As shown, the embodiments of the present application provide an antenna device, including a reflector 100, a radiation unit 200 and a feeding network 300. Among them, the radiation unit 200 is arranged on one side of the reflector 100. In this way, the receiving sensitivity of the antenna signal can be improved through the reflector 100. At the same time, the reflector 100 also plays a role in blocking and shielding the radio waves from the other side of the radiation unit 200, and improving the anti-interference ability of the radiation unit 200 to the received signal. One end of the feeding network 300 is electrically connected to the radiation unit 200, and the other end of the feeding network 300 is electrically connected to a radio frequency signal port (not shown in the figure). In this way, the radio frequency signal transmission between the radiation unit 200 and the radio frequency signal port can be realized through the feeding network 300.

[0076] It can be understood that radio frequency signal transmission includes the transmission or reception of radio frequency signals. Of course, radio frequency signal transmission can also include the transmission and reception of radio frequency signals. For example, a radio frequency signal port can be used to transmit or receive radio frequency signals.

[0077] When the antenna device is used as a transmitting antenna device, the radio frequency signal port is a radio frequency signal source for transmitting radio frequency signals; when the antenna device is used as a receiving antenna device, the radio frequency signal port is a radio frequency signal receiving end for receiving radio frequency signals.

[0078] In practical applications, the radio frequency signal port is generally located in a radio remote unit (RRU for short) in a communication device such as a base station device.

[0079] It can be understood that the radiation unit 200 can be one or more (see Figure 3 shown). When there are multiple radiation units 200, the multiple radiation units 200 can be arranged at intervals in an array on one side of the reflector 100. In this way, the antenna device of the embodiment of the present application is an array antenna device. For example, the multiple radiation units 200 are arranged at intervals along the extension direction of the reflector 100 (refer to Figure 3 the x direction in

[0080] Referring to Figure 3 shown, for the convenience of description, the extension direction of the reflector 100 is represented by the x direction, the width direction of the reflector 100 is represented by the y direction, and the direction perpendicular to the reflector 100 is represented by the z direction.

[0081] Hereinafter, the structure of the antenna device will be described specifically by taking one radiation unit 200 as an example.

[0082] Figure 4 is Figure 3 a partial enlarged view of part I in Figure 4 shown. Referring to

[0083] shown, in the antenna device of the embodiment of the present application, the radiation unit 200 includes a balun 220 and a radiation arm 210. One end of the balun 220 is disposed on the radiation arm 210, and the other end of the balun 220 is disposed on one side of the reflector 100. In other words, the balun 220 is located between the radiation arm 210 and the reflector 100.

[0084] It should be noted that the radiation unit 200 of the embodiment of the present application has one balun 220. Figure 2As shown, the angle between the height direction of the balun 220 and the reflector 100 can be 90°, that is, the height direction of the balun 220 is parallel to the z direction. Of course, in some examples, the angle between the height direction of the balun 220 and the reflector 100 can be an acute angle, that is, the angle between the height direction of the balun 220 and the z direction is an acute angle. In the embodiments of the present application, the case where the height direction of the balun 220 is parallel to the z direction is specifically taken as an example for illustration.

[0085] The radiation arms 210 in the radiation unit 200 are used to radiate electromagnetic wave signals or receive electromagnetic wave signals. The number of the radiation arms 210 is at least two, and at least two radiation arms 210 are all arranged at the first end of the balun 220. For example, the radiation unit 200 has two radiation arms 210, and the two radiation arms 210 can be orthogonally arranged at the first end of the balun 220. In this way, one of the radiation arms 210 can be used as the first dipole, and the other radiation arm 210 can be used as the second dipole. It should be noted that the two radiation arms 210 are insulated from each other. For example, the overlapping parts of the two radiation arms 210 along the z direction are electrically isolated by an insulating material.

[0086] Figure 5 is Figure 4 a top view. Referring to Figure 5 As shown, for another example, the radiation unit 200 may further include four radiation arms 210, two of the radiation arms 210 are arranged at intervals in the a direction, and the other two radiation arms 210 are arranged at intervals in the b direction, where the a direction and the b direction are perpendicular to each other. In this way, the two radiation arms 210 located in the a direction can be used as the first dipole, and the two radiation arms 210 located in the b direction can be used as the second dipole.

[0087] In practical applications, the plane where each radiation arm 210 is located is parallel to the reflector 100. In other words, each radiation arm 210 is parallel to the x-y plane. In addition, all the radiation arms 210 in the radiation unit 200 in the embodiments of the present application are located in the same plane.

[0088] Hereinafter, the case where the radiation unit 200 has four radiation arms 210 is specifically taken as an example for illustration.

[0089] Referring to Figure 5 As shown, for the convenience of description, in the embodiments of the present application, the four radiation arms 210 of the radiation unit 200 are respectively used as the first radiation arm 211, the second radiation arm 212, the third radiation arm 213, and the fourth radiation arm 214, where the first radiation arm 211 and the second radiation arm 212 are arranged at intervals in the a direction and are used as the first dipole, and the third radiation arm 213 and the fourth radiation arm 214 are arranged at intervals in the b direction and are used as the second dipole.

[0090] Figure 6 isFigure 3 Left view. Refer to Figure 4 and Figure 6 As shown, the balun 220 includes a first feeding layer 222, a common ground layer 221, and a second feeding layer 223 arranged in sequence (refer to Figure 6 shown). For example, the balun 220 includes a first feeding layer 222, a common ground layer 221, and a second feeding layer 223 arranged in sequence along a first direction. In other words, the first feeding layer 222 and the second feeding layer 223 are respectively arranged on both sides of the common ground layer 221 along the first direction. Among them, the balun 220 of the radiation unit 200 has only one common ground layer 221.

[0091] Refer to Figure 6 shown. It should be noted that the first direction can be regarded as the thickness direction of the balun 220, and this thickness direction is perpendicular to the height direction of the balun 220. For example, the first direction (i.e., the thickness direction) can be the x direction or the y direction. In the embodiments of the present application, the first direction is taken as the y direction as an example for illustration.

[0092] In practical applications, the first feeding layer 222 (refer to Figure 4 shown) and the second feeding layer 223 ( Figure 4 the second feeding layer 223 is not shown in

[0093] are both sheet-like members with a certain width. For example, the width direction of the first feeding layer 222 and the second feeding layer 223 is the x direction, and the height direction is the z direction. In the embodiments of the present application, the common ground layer 221 of the balun 220 is also a sheet-like member, and the width direction of this common ground layer 221 is also the x direction, and the height direction is the z direction.

[0093] It can be understood that the first feeding layer 222 and the common ground layer 221 are insulated from each other, and the second feeding layer 223 and the common ground layer 221 are insulated from each other to ensure that the first feeding layer 222, the common ground layer 221, and the second feeding layer 223 do not short-circuit. For example, the first feeding layer 222 and the common ground layer 221 are electrically isolated through a plastic layer. Correspondingly, the second feeding layer 223 and the common ground layer 221 are electrically isolated through a plastic layer. Of course, the feeding layers (i.e., the first feeding layer 222 and the second feeding layer 223) and the common ground layer 221 can also be electrically isolated through other insulating materials. The insulating materials are not limited here.

[0094] Continue to refer to Figure 4 and Figure 6, wherein one end of the common ground layer 221 is electrically connected to one of the radiating arms 210, and the other end of the common ground layer 221 is electrically connected to the reflector 100. For example, the first end of the common ground layer 221 is electrically connected to one of the radiating arms 210, and the second end of the common ground layer 221 is electrically connected to the reflector 100. Herein, the first end and the second end of the common ground layer 221 respectively refer to two opposite ends of the common ground layer 221 along the height direction of the common ground layer 221 (e.g., the z direction). The first end of the common ground layer 221 is the end close to the radiating arm 210, and the second end of the common ground layer 221 is the end close to the emitter plate 100.

[0095] In practical applications, the reflector 100 is a reference ground. By electrically connecting the second end of the common ground layer 221 of the balun 220 to the reflector 100 and the first end of the common ground layer 221 to one of the radiating arms 210, the radiating arm 210 is ensured to be grounded.

[0096] When specifically setting, the first end of the common ground layer 221 can be electrically connected to one of the radiating arms 210 corresponding to the first dipole, or can be electrically connected to one of the radiating arms 210 corresponding to the second dipole, or can be electrically connected to one of the radiating arms 210 of the first dipole and one of the radiating arms 210 of the second dipole simultaneously.

[0097] Refer to Figure 5 As shown, for example, the first end of the common ground layer 221 can be electrically connected to the first radiating arm 211 and the fourth radiating arm 214 through the mounting portion 226. Specifically, the first mounting portion 226a can be connected to the side of the first radiating arm 211 facing the second radiating arm 212 through the extension portion 227, and the second mounting portion 226b can be connected to the side of the fourth radiating arm 214 facing the third radiating arm 213. A part of the first end of the common ground layer 221 is connected to the first mounting portion 226a, and another part of the first end of the common ground layer 221 is connected to the second mounting portion 226b, so that the first end of the common ground layer 221 is electrically connected to the first radiating arm 211 and the fourth radiating arm 214 simultaneously.

[0098] It can be understood that the mounting portion 226 (i.e., the first mounting portion 226a and the second mounting portion 226b) and the extension portion 227 are both conductive parts to realize the electrical connection of the first end of the common ground layer 221 to the first radiating arm 211 and the fourth radiating arm 214 simultaneously.

[0099] Refer to Figure 5 As shown, one end of the first feeding layer 222 and the second feeding layer 223 is electrically connected to the other radiating arm 210, and the other end of the first feeding layer 222 and the second feeding layer 223 is electrically connected to the corresponding RF signal port. For example, the first end of the first feeding layer 222 and the second feeding layer 223 is electrically connected to the other radiating arm 210, and the second end of the first feeding layer 222 and the second feeding layer 223 is electrically connected to the corresponding RF signal port.

[0100] Referring to Figure 6 as shown, wherein, the first end and the second end of the first feeding layer 222 respectively refer to the two ends of the first feeding layer 222 oppositely arranged along the height direction of the balun 220 (e.g., the z direction), the first end of the first feeding layer 222 is close to the radiation arm 210, and the second end of the first feeding layer 222 is far from the radiation arm 210. Similarly, the first end and the second end of the second feeding layer 223 respectively refer to the two ends of the second feeding layer 223 oppositely arranged along the height direction of the balun 220 (e.g., the z direction), and the first end of the second feeding layer 223 is close to the radiation arm 210, and the second end of the second feeding layer 223 is far from the radiation arm 210.

[0101] When specifically setting, the first end of the first feeding layer 222 can be electrically connected to one of the radiation arms 210 of the first dipole. Correspondingly, the first end of the second feeding layer 223 is electrically connected to one of the radiation arms 210 of the second dipole. For example, the first end of the first feeding layer 222 is electrically connected to the first radiation arm 211, and the first end of the second feeding layer 223 is electrically connected to the third radiation arm 213. Or, referring to Figure 5 as shown, the first end of the first feeding layer 222 is electrically connected to the third radiation arm 213, and the first end of the second feeding layer 223 is electrically connected to the second radiation arm 212. Or, the first end of the first feeding layer 222 is electrically connected to the second radiation arm 212, and the first end of the second feeding layer 223 is electrically connected to the third radiation arm 213.

[0102] It should be noted here that the first end of the common ground layer 221 and the first end of the feeding layer (the first feeding layer 222 and the second feeding layer 223) need to be electrically connected to different radiation arms 210 to avoid short - circuit of the radiation arms 210. For example, referring to Figure 5 as shown, when the first end of the common ground layer 221 is electrically connected to the first radiation arm 211 and the fourth radiation arm 214, the first end of the first feeding layer 222 is electrically connected to the third radiation arm 213, and the first end of the second feeding layer 223 is electrically connected to the second radiation arm 212.

[0103] For another example, when the first end of the common ground layer 221 is electrically connected to the second radiation arm 212 and the third radiation arm 213, the first end of the first feeding layer 222 is electrically connected to the first radiation arm 211, and the first end of the second feeding layer 223 is electrically connected to the fourth radiation arm 214.

[0104] Referring to Figure 6As shown, it can be understood that the first end of the first feeding layer 222 can be directly electrically connected to the radiation arm 210, or can be arranged at an interval from the radiation arm 210, so that the first end of the first feeding layer 222 is coupled and fed to the radiation arm 210. Similarly, the first end of the second feeding layer 223 can be directly electrically connected to the radiation arm 210, or can be arranged at an interval from the radiation arm 210, so that the first end of the second feeding layer 223 is coupled and fed to the radiation arm 210.

[0105] Referring to Figure 6 As shown, for example, the first end of the first feeding layer 222 is directly electrically connected to the third radiation arm 213, and the first end of the second feeding layer 223 is directly electrically connected to the second radiation arm 212. Among them, the first end of the first feeding layer 222 passes through the upper surface of the third radiation arm 213, and the first end of the second feeding layer 223 is located on the lower surface of the second radiation arm 212.

[0106] It should be noted that the upper surface of the radiation arm 210 (such as the third radiation arm 213 and the second radiation arm 212) refers to the surface of the radiation arm 210 facing away from the reflector 100, and the lower surface of the radiation arm 210 refers to the surface of the radiation arm 210 facing the reflector 100.

[0107] In addition, in practical applications, there are two radio frequency signal ports for realizing dual-polarization feeding, namely the first radio frequency signal port and the second radio frequency signal port.

[0108] Taking the first radio frequency signal port for transmitting or receiving radio frequency signals in the +45° polarization direction and the second radio frequency signal port for transmitting or receiving radio frequency signals in the -45° polarization direction as an example, the second end of the first feeding layer 222 is electrically connected to the first radio frequency signal port. In this way, the first feeding layer 222 is used to transmit radio frequency signals in the +45° polarization direction, and the second end of the second feeding layer 223 is electrically connected to the second radio frequency signal port. In this way, the second feeding layer 223 is used to transmit radio frequency signals in the -45° polarization direction.

[0109] Of course, in some examples, the second end of the first feeding layer 222 can be electrically connected to the second radio frequency signal port. In this way, the first feeding layer 222 is used to transmit radio frequency signals in the -45° polarization direction, and the second end of the second feeding layer 223 is electrically connected to the first radio frequency signal port. In this way, the second feeding layer 223 is used to transmit radio frequency signals in the +45° polarization direction.

[0110] In the embodiment of the present application, it is specifically described by taking the first feeding layer 222 for transmitting radio frequency signals in the +45° polarization direction and the second feeding layer 223 for transmitting radio frequency signals in the -45° polarization direction as an example.

[0111] Referring to Figures 4 to 6As shown in the figure, in the embodiment of the present application, a balun 220 is used to achieve the transmission of dual-polarized RF signals between the radiation arms 210 and the RF signal ports. For example, when the RF signal port is an RF signal source, the first RF signal port feeds the RF signal in the +45° polarization direction into the third radiation arm 213 through the first feeding layer 222 in the balun 220. Since the third radiation arm 213 and the fourth radiation arm 214 are spaced apart, the electromagnetic wave emitted by the third radiation arm 213 excites an RF current on the fourth radiation arm 214, so that an RF signal in the +45° polarization direction is generated on the first dipole. The second RF signal port feeds the RF signal in the -45° polarization direction into the second radiation arm 212 through the second feeding layer 223 of the balun 220. Since the second radiation arm 212 and the first radiation arm 211 are spaced apart, the electromagnetic wave emitted by the second radiation arm 212 excites an RF current on the first radiation arm 211, so that an RF signal in the -45° polarization direction is generated on the second dipole. Furthermore, an electromagnetic wave signal in the dual-polarization direction is radiated from the radiation surface formed by the four radiation arms 210.

[0112] Based on the above, compared with the traditional technology, the balun 220 in the radiation unit 200 of the embodiment of the present application not only realizes the function of dual-polarized feeding, but also simplifies the structure of the radiation unit 200 by only arranging one balun 220 in the radiation unit 200, thereby simplifying the assembly process of the entire radiation unit 200.

[0113] When the balun 220 of the embodiment of the present application is specifically arranged, it includes an insulating body (not shown in the figure) and three layers of sheet metal. The insulating body is arranged between the radiation arms 210 and the reflector 100. The three layers of sheet metal are spaced apart, and there is an insulating body between two adjacent sheet metals. This insulating body serves as the insulating medium between the three layers of sheet metal. Among them, the sheet metal in the middle is the common ground layer 221, and the sheet metals on both sides are the first feeding layer 222 and the second feeding layer 223 respectively.

[0114] In the embodiment of the present application, by manufacturing the balun 220 with three layers of sheet metal, compared with the manufacturing methods of printed circuit boards, cables, or the photolithography and etching process (PEP for short), the manufacturing cost of the balun 220 is effectively saved, and at the same time, the manufacturing process of the balun 220 is made simpler and faster.

[0115] Refer to Figure 4 and Figure 6As shown, the phase shifter 310 includes a feeding member 311. One end of the feeding member 311 is electrically connected to the second end of the first feeding layer 222, and the other end of the feeding member 311 is electrically connected to the first radio frequency signal port, so that the second end of the first feeding layer 222 is electrically connected to the first radio frequency signal port through the feeding member 311. In this way, the radio frequency current in the +45° polarization direction can be sequentially transmitted to the feeding member 311 and the first feeding layer 222 of the phase shifter 310 through the first radio frequency signal port, and the radio frequency current in the -45° polarization direction can be transmitted to the second feeding layer 223 through the second radio frequency signal port, so that at least two radiation arms 210 (for example, four radiation arms 210) radiate electromagnetic wave signals in the dual polarization directions.

[0116] For convenience of description, hereinafter, the end of the feeding member 311 connected to the first feeding layer 222 is taken as the first end of the feeding member 311, and the end of the feeding member 311 connected to the first radio frequency signal port is taken as the second end of the feeding member 311.

[0117] In addition, the phase of the output end of the first feeding layer 222 can be adjusted through the feeding member 311 of the phase shifter 310.

[0118] When specifically arranged, the feeding member 311 and the first feeding layer 222 are an integral part, which not only realizes the phase adjustment function of the output end of the first feeding layer 222, but also simplifies the connection structure between the balun 220 and the phase shifter 310, thereby simplifying the assembly process between the feeding network 300 and the radiation unit 200, improving the assembly efficiency of the entire antenna device, and saving the manufacturing cost at the same time.

[0119] Wherein, since both the feeding member 311 and the first feeding layer 222 are made of conductive metal materials, the feeding member 311 and the first feeding layer 222 can be integrally injection molded, so that the feeding member 311 and the first feeding layer 222 are formed as an integral part.

[0120] It should be noted that the output end of the first feeding layer 222 can be the first end of the first feeding layer 222 or the second end of the first feeding layer 222. For example, when the antenna device is a transmitting antenna, the output end of the first feeding layer 222 is the first end of the first feeding layer 222, and when the antenna device is a receiving antenna, the output end of the first feeding layer 222 is the second end of the first feeding layer 222.

[0121] For example, through the phase shifter 310, the signal phase of the first end of the first feeding layer 222 can be changed to change the signal phase of the radiation arm 210 corresponding to the +45° polarization direction. Further, when the antenna device includes multiple radiation units 200, a phase difference is formed between the radiation arms 210 of each radiation unit 200, so as to realize the electrical downtilt of the array antenna.

[0122] In practical applications, the phase shifter 310 includes a signal ground. A dielectric layer is formed between the feeding member 311 and the signal ground. By changing the resistance of the dielectric layer, the phase of the output end of the first feeding layer 222 can be adjusted.

[0123] Figure 7 Is Figure 6 The partial enlarged view at II in the figure. Refer to Figure 7 As shown, for example, the common ground layer 221 of the balun 220 is used as the signal ground of the phase shifter 310. At least a part of the feeding member 311 is disposed opposite to the common ground layer 221, and the air (such as the first air layer 224 involved below) between the feeding member 311 and the common ground layer 221 is used as the dielectric layer of the phase shifter 310. In this way, the feeding member 311, the air dielectric, and the common ground layer 221 together form the air microstrip line structure of the phase shifter 310.

[0124] When it is necessary to adjust the phase of the output end of the first feeding layer 222, the feeding member 311 can be moved to change the area of the projection of the feeding member 311 on the common ground layer 221, so as to change the volume of the air dielectric, and further adjust the resistance of the dielectric layer of the phase shifter 310, thereby realizing the adjustment of the phase of the output end of the first feeding layer 222. The specific working principle of the phase shifter 310 can be directly referred to the relevant content of the prior art, and will not be elaborated here.

[0125] In the embodiment of the present application, one end of the feeding member 311 is electrically connected to the second end of the first feeding layer 222 as an example, so that the phase shifter 310 adjusts the phase of the radio frequency signal in the +45° polarization direction. Of course, in some examples, one end of the feeding member 311 can also be electrically connected to the second end of the second feeding layer 223, so that the phase shifter 310 adjusts the phase of the radio frequency signal in the -45° polarization direction.

[0126] Refer to Figure 4 As shown, the feeding member 311 in the embodiment of the present application can be a feeding sheet, and the feeding sheet and the first feeding layer 222 are located in the same plane. For example, the feeding sheet and the first feeding layer 222 are located in any plane parallel to the x-z plane. At the same time, the plane where the feeding sheet and the first feeding layer 222 are located is perpendicular to the reflecting plate 100.

[0127] In the embodiment of the present application, by setting the feeding member 311 as a feeding sheet and arranging the feeding member 311 and the first feeding layer 222 in the same plane, the manufacturing process of integrally forming the feeding member 311 and the first feeding layer 222 is simplified, that is, the manufacturing difficulty of integrally forming the feeding member 311 and the first feeding layer 222 is reduced, thereby improving the manufacturing efficiency of the antenna device. In addition, the plane where the feeding member 311 and the first feeding layer 222 are located is perpendicular to the surface of the reflecting plate 100, avoiding the coupling between the feeding member 311 and the surface of the reflecting plate 100 and affecting the transmission performance of the radio frequency signal.

[0128] In specific settings, the feeding element 311 may include a plurality of bending portions in its extending direction (refer to Figure 4 shown). For example, the feeding element 311 has a plurality of bending portions on any plane parallel to the x-z plane, so as to increase the overlapping area between the feeding element 311 and the common ground layer 221 in the y direction, thereby improving the stability of the dielectric layer in the phase shifter and ensuring the working performance of the phase shifter.

[0129] Refer to Figure 6 shown, in the balun 220 of the embodiment of the present application, electrical isolation can be achieved between the common ground layer 221 and the first feeding layer 222, and between the common ground layer 221 and the second feeding layer 223 through an air medium. For example, there is a first air layer 224 between the common ground layer 221 and the first feeding layer 222, and a second air layer 225 between the common ground layer 221 and the second feeding layer 223. In this way, the first feeding layer 222, the first air layer 224 and the common ground layer 221 together form a first air microstrip line for transmitting radio frequency signals in the +45° polarization direction, and the second feeding layer 223, the second air layer 225 and the common ground layer 221 together form a second air microstrip line for transmitting radio frequency signals in the -45° polarization direction. The first air microstrip line and the second air microstrip line together form the air microstrip line structure of the balun 220, reducing the energy loss of the dielectric layer of the balun 220 to the radio frequency signal and improving the radiation performance of the antenna device.

[0130] Refer to Figure 6 and Figure 7 shown, there is also a first air layer 224 between the feeding element 311 of the phase shifter 310 and the common ground layer 221 of the balun 220. In other words, the common ground layer 221 also serves as the signal ground of the phase shifter 310, and the first air layer 224 is also the dielectric layer of the phase shifter 310. In this way, the feeding element 311, the first air layer 224 and the common ground layer 221 together form the air microstrip line structure of the phase shifter 310, reducing the energy loss of the feeding network 300 to the radio frequency signal and also saving the manufacturing cost of the phase shifter 310. For example, there is a part of the first air layer 224 between a part of the first feeding layer 222 and the common ground layer 221, and there is another part of the first air layer 224 between at least a part of the first end of the feeding element 311 and another part of the common ground layer 221, so that the two parts of the first air layer 224 together form an air dielectric layer for transmitting radio frequency signals in the +45° polarization direction, and the first end of the feeding element 311 is electrically connected to the second end of the first feeder layer, so that the air microstrip line structure of the phase shifter 310 is connected to the first microstrip line of the balun 220 and serves as an air microstrip line for transmitting radio frequency signals in the +45° polarization direction.

[0131] For the convenience of understanding, the first feeding layer 222 and the feeding element 311 can be regarded as a transmission line. This transmission line is located on one side of the common ground layer 221 and forms a first air layer 224 between it and the common ground layer 221. In this way, the balun 220 and the phase shifter 310 form an interconnected air microstrip line structure, that is, the entire feeding network 300 and the balun 220 form an air microstrip line structure, thereby reducing the energy loss of the feeding network 300 and the balun 220 to the radio frequency signal, improving the radiation performance of the antenna device, and saving the manufacturing cost of the balun 220 and the feeding network 300.

[0132] When specifically arranged, the common ground layer 221 can extend along the z direction, that is, perpendicular to the reflecting plate 100. The first feeding layer 222 is located on one side of the common ground layer 221 along the y direction, and the orthographic projection of the first feeding layer 222 on the common ground layer 221 covers the first area of the common ground layer 221. Among them, the first feeding layer 222 can extend along the z direction, that is, the first feeding layer 222 is arranged parallel to the common ground layer 221.

[0133] A part of the feeding element 311 is also located on one side of the common ground layer 221 along the y direction, and the orthographic projection of a part of the feeding element 311 on the common ground layer 221 covers the second area of the common ground layer 221. Among them, a part of the feeding element 311 can extend along the z direction or have a component in the z direction, that is, there is a certain angle between a part of the feeding element 311 and the z direction, as long as it is ensured that a part of the feeding element 311 is located on one side of the common ground layer 221 along the y direction. In this way, a first air layer 224 can also be formed between the feeding element 311 and the common ground layer 221.

[0134] Among them, the first area is close to the radiation arm 210, and the second area is close to the reflecting plate 100.

[0135] Continue to refer to Figure 4 and Figure 6 As shown, the phase shifter 310 can further include a sliding medium 312, and at least part of the sliding medium 312 is movably arranged on the side of the feeding element 311 facing the common ground layer 221. When the sliding medium 312 slides relative to the common ground layer 221, at least part of the sliding medium 312 coincides with at least part of the first air layer 224. It can be understood that the sliding medium 312 specifically coincides with the first air layer 224 on one side of the feeding element 311. Among them, at least part of the sliding medium 312 coincides with at least part of the first air layer 224 means that at least part of the sliding medium 312 enters into the first air layer 224.

[0136] Refer to Figure 4 As shown, when arranged, the sliding medium 312 can be a strip-shaped member.

[0137] In some examples, the sliding medium 312 can also be a cylindrical member. The sliding medium 312 is movably sleeved on the outer periphery of the feeding member 311, so that a part of the sliding medium 312 is located on the side of the feeding member 311 facing the common ground layer 221, and a part of the sliding medium 312 can slide into the first air layer 224.

[0138] Of course, the sliding medium 312 can also be a double-layer structure. The feeding member 311 is wrapped inside the double-layer structure of the sliding medium 312, and the sliding medium 312 is movably arranged on the surface of the feeding member 311. A part of the sliding medium 312 is located on the side of the feeding member 311 facing the common ground layer 221, so as to ensure that the sliding medium 212 can move into the first air layer 224. The embodiments of the present application do not specifically limit the setting manner of the sliding medium 312.

[0139] In the embodiments of the present application, specifically, the sliding medium 312 is a strip-shaped member and is movably arranged on the side of the feeding member 311 facing the common ground layer 221 as an example for illustration.

[0140] When it is necessary to change the signal phase of the output end of the first feeding layer 222, the sliding medium 312 can be moved so that the sliding medium 312 enters the first air layer 224 between the feeding member 311 and the common ground layer 221 to coincide with the first air layer 224, thereby changing the medium resistance of the first air layer 224, that is, the medium layer resistance of the air microstrip line corresponding to the phase shifter 310, and further stably adjusting the signal phase of the output end of the first feeding layer. Among them, the different coincidence amounts between the sliding medium 312 and the first air layer 224 result in different signal phases of the output end of the first feeding layer. Specifically, the position of the sliding medium 312 can be adjusted according to needs.

[0141] Refer to Figure 4 and Figure 6 As shown, in the specific implementation, the common ground layer 221 of the balun 220 can include a first part 2211 and a second part 2212. Among them, the first part 2211 extends in a direction perpendicular to the reflector 100, and the second part 2212 extends in a direction parallel to the reflector 100. In other words, the extending direction of the first part 2211 of the common ground layer 221 is perpendicular to the reflector 100, that is, the extending direction of the first part 2211 is the z direction, and the extending direction of the second part 2212 of the common ground layer 221 is parallel to the reflector 100, that is, the extending direction of the second part 2212 is the x direction.

[0142] Based on the structural arrangement of the common ground layer 221, the first air layer 224 on one side of the common ground layer 221 includes two parts, one part being perpendicular to the reflector 100 and the other part being parallel to the reflector 100. Similarly, the second air layer 225 on the other side of the common ground layer 221 also includes two parts, one part being perpendicular to the reflector 100 and the other part being parallel to the reflector 100.

[0143] Figure 8 is Figure 3 the right view of. Refer to Figure 8 As shown, for example, in the specific arrangement, the first air layer 224 may include a first horizontal air layer 2242 and a first vertical air layer 2241 that are interconnected. There is a first vertical air layer 2241 between the first feeding layer 222 and the first part 2211, and there is a first horizontal air layer 2242 between the feeding member 311 of the phase shifter 310 and the second part 2212. Correspondingly, the second air layer 225 includes a second horizontal air layer 2252 and a second vertical air layer 2251 that are interconnected. There is a second vertical air layer 2251 between the second feeding layer 223 and the first part 2211.

[0144] It can be understood that the first vertical air layer 2241 and the second vertical air layer 2251 are perpendicular to the reflector 100. In other words, the extending directions of the first vertical air layer 2241 and the second vertical air layer 2251 are perpendicular to the reflector 100. For example, referring to Figure 8 as shown, the extending directions of the first vertical air layer 2241 and the second vertical air layer 2251 are in the z direction.

[0145] Correspondingly, the first horizontal air layer 2242 and the second horizontal air layer 2252 are parallel to the reflector 100. In other words, the extending directions of the first horizontal air layer 2242 and the second horizontal air layer 2252 are parallel to the reflector 100. For example, the extending directions of the first horizontal air layer 2242 and the second horizontal air layer 2252 are in the x direction ( Figure 8 in which the x direction is the direction perpendicular to the y - z plane).

[0146] Based on this, at least part of the feeding member 311 also extends in the x direction, such that at least part of the feeding member 311 is disposed opposite to the second part 2212 of the common ground layer 221, and a second horizontal air layer 2252 is formed therebetween.

[0147] For example, the extending direction of the feeding member 311 is in the x direction. In this way, the feeding member 311 forms a first horizontal air layer 2242 with the second part 2212 throughout its extending direction.

[0148] It can be understood that the first part 2211 of the common ground layer 221 is arranged close to the radiation arm 210, and the second part 2212 of the common ground layer 221 is arranged close to the reflector 100. The first feeding layer 222, the first part 2211 and the first vertical air layer 2241 jointly form the air microstrip line structure of the balun 220, and the feeding member 311, the second part 2212 and the first horizontal air layer 2242 jointly form the air microstrip line structure of the phase shifter 310.

[0149] Referring to Figure 4 As shown, the sliding medium 312 of the phase shifter 310 can specifically coincide with at least a part of the first horizontal air layer 2242. For example, when it is necessary to change the signal phase at the output end of the first feeding layer 222, the sliding medium 312 can be moved so that the sliding medium 312 enters the first horizontal air layer 2242 to coincide with the first horizontal air layer 2242, thereby changing the medium resistance of the first horizontal air layer 2242, that is, the medium layer resistance of the air microstrip line corresponding to the phase shifter 310, and then stably adjusting the signal phase at the output end of the first feeding line layer.

[0150] In the embodiment of the present application, the common ground layer 221 is set as two parts. The first part 2211 is set to extend in a direction perpendicular to the reflector 100, and the second part 2212 is set to extend in a direction parallel to the reflector 100. In this way, a first vertical air layer 2241 can be formed between the first feeding layer 222 and the first part 2211, and a first horizontal air layer 2242 can be formed between the feeding member 311 and the second part 2212. By moving the sliding medium 312 so that the sliding medium 312 coincides with the first horizontal air layer 2242, not only the phase adjustment of the output end of the radiation unit 200 is realized, but also the air microstrip line structures of the balun 220 and the phase shifter 310 are reasonably arranged, saving the space of the antenna device in the direction perpendicular to the reflector 100, and further improving the structural stability between the feeding network 300 and the radiation unit 200.

[0151] Figure 9 is Figure 3 the exploded view of Figure 10 is Figure 3 the partial enlarged view of III in Figure 9 and Figure 10 As shown, when the antenna device includes a plurality of radiation units 200, the phase shifter 310 adjusts the output end phase of each radiation unit 200 to form a phase difference between the radiation units 200, so as to realize the electrical downtilt of the antenna device as an array antenna.

[0152] In specific settings, the phase shifter 310 may include a plurality of feeding elements 311. The plurality of feeding elements 311 are arranged in one-to-one correspondence with the baluns 220 of the plurality of radiation units 200. The first end of each feeding element 311 is electrically connected to the second end of the first feeding layer 222 of the corresponding balun 220, so as to adjust the signal phase at the output end of the corresponding first feeding layer 222, thereby forming a phase difference between the respective radiation units 200.

[0153] Referring to Figure 10 As shown, taking three radiation units 200 arranged at intervals in the x direction as an example. The antenna device includes a first radiation unit 200a, a second radiation unit 200b, and a third radiation unit 200c. Among them, the balun 220a corresponding to the first radiation unit 200a is the first balun 220a, the balun 220 corresponding to the second radiation unit 200b is the second balun 220b, and the balun 220 corresponding to the third radiation unit 200c is the third balun 220c.

[0154] Referring to Figure 10 As shown, the phase shifter 310 has three feeding elements 311, namely the feeding element 311a, the feeding element 311b, and the feeding element 311c. Among them, the first end of the feeding element 311a is electrically connected to the first feeding layer 222 of the first balun 220a, the first end of the feeding element 311b is electrically connected to the first feeding layer 222 of the second balun 220b, and the first end of the feeding element 311c is electrically connected to the first feeding layer 222 of the third balun 220c. In this way, by changing the dielectric layer resistance between the three feeding elements 311 and the ground of the phase shifter 310, the adjustment of the signal phase at the output ends of the three radiation units 200 can be realized, thereby forming a phase difference between the three radiation units 200.

[0155] For example, the common ground layer 221 of each balun 220 is respectively used as the ground of the phase shifter 310. Among them, at least a part of the feeding element 311a forms one of the first air layers 224 with the first common ground layer 221 corresponding to the first balun 220a, at least a part of the feeding element 311b forms another first air layer 224 with the second common ground layer 221 corresponding to the second balun 220b, and at least a part of the feeding element 311c forms yet another first air layer 224 with the third common ground layer 221 corresponding to the third balun 220c. In this way, by changing the resistance of at least one of the three first air layers 224 corresponding to the three baluns 220, a phase difference can be formed between the three radiation units 200.

[0156] It can be understood that the three first air layers 224 corresponding to the three baluns 220 completely overlap in the x direction (as Figure 8 shown).

[0157] Based on the above, the first air layer 224 includes a first vertical air layer 2241 and a first horizontal air layer 2242. In this way, by changing the resistance of at least one of the three first air layers 224 corresponding to the three baluns 220, a phase difference can be formed between the three radiation units 200.

[0158] Continue to refer to Figure 10 As shown, during specific setting, the phase shifter 310 may include a sliding dielectric 312, and the sliding dielectric 312 is located between any one of the feeding members 311 and the corresponding common ground layer 221. By moving the sliding dielectric 312, the sliding dielectric 312 coincides with at least one of the three first air layers 224, thereby changing the phase of the output end of the corresponding radiation unit 200, forming a phase difference between the respective radiation units 200, and realizing the electrical downtilt of the array antenna.

[0159] Specifically, when a part of the sliding dielectric 312 moves into the first air layer 224 of the first balun 220a and the sliding dielectric 312 does not enter the first air layer 224 of the second balun 220b and the first air layer 224 of the third balun 220c, the sliding dielectric 312 changes the dielectric resistance of the air microstrip line structure corresponding to the first radiation unit 200, thereby changing the signal phase of the first radiation unit 200, forming a phase difference at the output ends of the three radiation units 200, and thus realizing the electrical downtilt of the antenna device.

[0160] For another example, when a part of the sliding dielectric 312 is located in the first air layer 224 of the first balun 220a and another part is located in the first air layer 224 of the second balun 220b, and the sliding dielectric 312 does not enter the first air layer 224 of the third balun 220c, the sliding dielectric 312 changes the dielectric resistance of the air microstrip line structures corresponding to the first radiation unit 200 and the second radiation unit 200, thereby changing the signal phases of the first radiation unit 200 and the second radiation unit 200, forming a phase difference at the output ends of the three radiation units 200, and thus realizing the electrical downtilt of the antenna device.

[0161] For convenience of description, the overlapping amount of the sliding dielectric 312 and the first air layer 224 of the first balun 220a is the first overlapping amount, and the overlapping amount of the sliding dielectric 312 and the first air layer 224 of the second balun 220b is the second overlapping amount. The first overlapping amount and the second overlapping amount may be equal or unequal. When the first overlapping amount and the second overlapping amount are equal, the phase of the output end of the first radiation unit 200 is equal to the phase of the output end of the second radiation unit 200. On the contrary, when the first overlapping amount and the second overlapping amount are unequal, the phase of the output end of the first radiation unit 200 is not equal to the phase of the output end of the second radiation unit 200.

[0162] In the above technical solution, multiple baluns 220 share a sliding medium 312. In this way, during specific operation, a sliding medium 312 moves between the first air layers 224 of multiple baluns 220 to change the overlapping amount of the air microstrip line corresponding to each radiation unit 200, so as to ensure that a phase difference is formed between each radiation unit 200 to achieve electrical downtilt of the antenna device while saving the manufacturing cost of the phase shifter 310.

[0163] In some examples, the phase shifter 310 may include multiple sliding media 312, and the multiple sliding media 312 are arranged in one-to-one correspondence with the multiple first air layers 224. For example, when the antenna device includes three radiation units 200, the phase shifter 310 includes a first sliding medium 3121, a second sliding medium 3122, and a third sliding medium 312. Among them, the first sliding medium 3121 overlaps at least partially with the first air layer 224a to change the medium resistance of the first air layer 224a, thereby changing the signal phase at the output end of the first radiation unit 200. The second sliding medium 3122 overlaps at least partially with the first air layer 224b to change the medium resistance of the first air layer 224b, thereby changing the signal phase at the output end of the second radiation unit 200. The third sliding medium 312 overlaps at least partially with the first air layer 224c to change the medium resistance of the first air layer 224c, thereby changing the signal phase at the output end of the third radiation unit 200, and further forming a phase difference between each radiation unit 200 to achieve electrical downtilt of the array antenna.

[0164] In the embodiment of the present application, the phase shifter 310 is set to include multiple feeding members 311, and the multiple feeding members 311 are connected to the baluns 220 of the corresponding radiation units 200. In this way, the phase adjustment of multiple radiation units 200 can be realized through one phase shifter 310. For example, a phase difference is formed between multiple radiation units 200 through one phase shifter 310, so as to achieve electrical downtilt of each radiation unit 200 in the antenna device, which not only ensures the radiation performance of the antenna device, but also simplifies the structure of the feeding network 300, making the structural layout of the entire feeding network 300 more concise and reliable.

[0165] In practical applications, the second ends of the multiple feeding members 311 of the phase shifter 310 can be directly electrically connected to the corresponding radio frequency signal ports.

[0166] Refer to Figure 10As shown, in some examples, the antenna device further includes a main feeder line 320. The first end of each feeder 311 of the phase shifter 310 is electrically connected to the corresponding first feeding layer 222, and the second end of each feeder 311 is electrically connected to the main feeder line 320. One end of the main feeder line 320 is used for electrically connecting to a radio frequency signal port, so that the second end of each feeder 311 is electrically connected to the corresponding radio frequency signal port. For example, the second end of each feeder 311 can be electrically connected to the first radio frequency signal port through a main feeder line 320, realizing the transmission of radio frequency signals between the first radio frequency signal port and the multiple first feeding layers 222 through the main feeder line 320 and the corresponding feeders 311.

[0167] The electrical connection between the multiple feeders 311 and the radio frequency signal port is realized through the main feeder line 320. While realizing the electrical conduction between the multiple feeders 311 of the phase shifter 310 and the radio frequency signal port, the connection line between the multiple feeders 311 and the radio frequency signal port is simplified, making the structural layout of the entire feeding network 300 more concise and reliable.

[0168] Among them, each feeder 311 and the main feeder line 320 can be an integral part, further simplifying the structure of the feeding network 300 and improving the assembly efficiency of the entire antenna device.

[0169] Referring to Figure 10 As shown, the second part 2212 of the common ground layer 221 can be a part extending in the positive x direction from the end of the first part 2211 close to the reflector 100, or a part extending in the negative x direction from the end of the first part 2211 close to the reflector 100. Of course, the second part 2212 of the common ground layer 221 can also be two parts extending in two directions (positive and negative) of the x direction from the end of the first part 2211 close to the reflector 100. The specific setting of the second part 2212 of the above-mentioned common ground layer 221 depends on the position of the radiation unit 200 corresponding to the common ground layer 221 among the multiple radiation units 200.

[0170] Continuing to refer to Figure 10 , taking the antenna device including only the first balun 220a, the second balun 220b, and the third balun 220c arranged at intervals in sequence in the positive x direction as an example, the common ground layer corresponding to the first balun 220a is the first common ground layer, the common ground layer corresponding to the second balun 220b is the second common ground layer, and the common ground layer corresponding to the third balun 220c is the third common ground layer. Among them, the second part 2212 of each common ground layer 221 extends in the x direction. For example, the second part 2212 of the first common ground layer 221, the second part 2212 of the second common ground layer 221, and the second part 2212 of the third common ground layer 221 all extend in the x direction.

[0171] Among them, the second part 2212 of the first common ground layer is a part extending in the positive x-direction from one end of the first part 2211. The second part 2212 of the second common ground layer is two parts extending in the positive and negative x-directions from one end of the first part 2211. The second part 2212 of the third common ground layer is a part extending in the negative x-direction from one end of the first part 2211.

[0172] Continue to refer to Figure 10 , in specific settings, among the multiple radiation units 200 arranged along the extension direction of the second part 2212, the second parts 2212 of two adjacent common ground layers 221 are an integral part. For example, the second part 2212 of the first common ground layer and the second part 2212 of the second common ground layer are an integral part, and the second part 2212 of the second common ground layer and the second part 2212 of the third common ground layer are an integral part. In this way, all the common ground layers 221 of the antenna device are formed as an integral part, while ensuring that the radiation units 200 of the antenna device are grounded, simplifying the structural setting of the radiation units 200 of the antenna device, and thus improving the assembly efficiency of the antenna device.

[0173] In the above example, the phase of the signal in one polarization direction in the radiation unit 200 is adjusted by one phase shifter 310. For example, by electrically connecting the feeding member 311 of the phase shifter 310 to the first feeding layer 222 in the radiation unit 200, the phase of the RF signal in the +45° polarization direction is adjusted.

[0174] Refer to Figure 8 As shown, the feeding network 300 of the embodiment of the present application may further include two phase shifters 310. For example, the feeding network 300 includes a first phase shifter 3101 and a second phase shifter 3102. The first phase shifter 3101 includes a first feeding member 3111 and a first sliding medium 3121. Among them, the first end of the first feeding member 3111 is electrically connected to the first feeding layer 222 of the balun 220, and the first sliding medium 3121 is located on the side of the first feeding member 3111 facing the common ground layer 221. In this way, the phase of the output end of the first feeding layer 222 is adjusted through the first phase shifter 3101, that is, the phase of the RF signal in the +45° polarization direction is adjusted. For example, by moving the first sliding medium 3121, at least part of the first sliding medium 3121 enters the first horizontal air layer 2242 of the first air layer 224, thereby changing the medium resistance of the first horizontal air layer 2242 and realizing the adjustment of the phase of the output end of the first feeding layer 222.

[0175] Accordingly, the second phase shifter 3102 includes a second feeding member 3112 and a second sliding dielectric 3122. The first end of the second feeding member 3112 is electrically connected to the second feeding layer 223 of the balun 220. The second sliding dielectric 3122 is located on the side of the second feeding member 3112 facing the common ground layer 221. In this way, the phase of the output end of the second feeding layer 223 is adjusted through the second phase shifter 3102, that is, the phase of the RF signal in the -45° polarization direction is adjusted. For example, by moving the second sliding dielectric 3122, at least part of the second sliding dielectric 3122 enters the second horizontal air layer 2252 of the second air layer 225, thereby changing the dielectric resistance of the second horizontal air layer 2252 and realizing the adjustment of the phase of the output end of the second feeding layer 223.

[0176] Among them, the first feeding member 3111 and the first feeding layer 222 are an integral part, and there is a first air layer 224 between the first feeding member 3111 and the common ground layer 221. By changing the dielectric resistance of the first air layer 224, the phase of the output end of the first feeding layer 222 is adjusted. The second feeding member 3112 and the second feeding layer 223 are an integral part, and there is a second air layer 225 between the second feeding member 3112 and the common ground layer 221. By changing the dielectric resistance of the second air layer 225, the phase of the output end of the second feeding layer 223 is adjusted.

[0177] It should be noted that the setting method and working principle of the first phase shifter 3101 and the setting method and working principle of the second phase shifter 3102 can specifically refer to the relevant content of the phase shifter 310 in the above text, which will not be elaborated here.

[0178] In the embodiment of the present application, by setting two phase shifters 310, where the first phase shifter 3101 is used to change the phase of the output end of the first feeding layer 222, and the second phase shifter 3102 is used to change the phase of the output end of the second feeding layer 223, the phases of the signals in two polarization directions are adjusted.

[0179] At the same time, by setting the first feeding member 3111 of the first phase shifter 3101 and the first feeding layer 222 as an integral part, and setting the second feeding member 3112 of the second phase shifter 3102 and the second feeding layer 223 as an integral part, the connection process between the two phase shifters 310 and the balun 220 is further simplified, thereby improving the assembly efficiency of the antenna device.

[0180] Refer to Figure 8 As shown, when the first phase shifter 3101 and the second phase shifter 3102 are specifically set, the first feeding member 3111 can be a first feeding piece. Accordingly, the second feeding member 3112 can be a second feeding piece.

[0181] Among them, the first feeding piece and the first feeding layer 222 are located in the first plane. For example, the first feeding piece and the first feeding layer 222 are located in the first plane parallel to the x-z plane. The second feeding piece and the second feeding layer 223 are located in the second plane. For example, the second feeding piece and the second feeding layer 223 are located in the second plane parallel to the x-z plane.

[0182] Based on the above, the first plane and the second plane can be two planes parallel to the x-z plane, and both the first plane and the second plane are perpendicular to the reflector 100 of the antenna device.

[0183] In the embodiment of the present application, by setting the feeding member 311 as a feeding piece, for example, setting the first feeding member 3111 as the first feeding piece and the second feeding member 3112 as the second feeding piece, and setting the feeding member 311 and the corresponding feeding layer in the same plane, the manufacturing process of integrally forming the feeding member 311 and the corresponding feeding layer is simplified, that is, the manufacturing difficulty of integrally forming the feeding member 311 and the corresponding feeding layer is reduced, thereby improving the manufacturing efficiency of the antenna device. In addition, the first plane where the first feeding member 3111 is located and the second plane where the second feeding member 3112 is located are both perpendicular to the surface of the reflector 100, avoiding the coupling between the first feeding member 3111 and the second feeding member 3112 and the surface of the reflector 100 respectively, which affects the transmission performance of the radio frequency signal.

[0184] Figure 11 It is a schematic structural diagram of another antenna device provided by an embodiment of the present application. Figure 12 is Figure 11 the left view of Figure 13 is Figure 11 the partial enlarged view at IV in Figures 11 to 13 As shown in Figure 12 In the embodiment of the present application, a through hole 110 can be formed on the reflector 100, and the through hole 110 penetrates through the two surfaces of the reflector 100 along the thickness direction (as shown in the z direction in

[0185] In addition, the reflector 100 includes a first side and a second side arranged opposite to each other in the z direction. By accommodating the second end of the balun 220 in the conductive shell 400 of the through hole 110, a part of the balun 220 (such as the radiation arm 210 side) is located on the first side of the reflector 100, and another part of the balun 220 (such as a part of the phase shifter 310) is located on the second side of the reflector 100, shortening the distance between the radiation arm 210 and the reflector 100. This not only saves the vertical space on the first side of the reflector 100, but also makes the antenna structure on the reflector 100 more stable, thereby ensuring the radiation performance of the antenna device.

[0186] Referring to Figure 12 As shown, a part of the phase shifter 310 is accommodated in the conductive shell 400. For example, a part of the common ground layer 221, the first feeding member 3111, the second feeding member 3112, and a part of the corresponding sliding medium 312 are all accommodated in the conductive shell 400, further reducing the loss of the phase shifter 310 during the transmission of radio frequency signals and improving the accuracy of the phase adjustment of the phase shifter 310.

[0187] It should be noted that when the antenna device includes a plurality of radiation units 200 arranged at intervals in the x direction, the through holes 110 on the reflector 100 can extend from one end of the reflector 100 in the x direction to the other end, so that one end of the plurality of radiation units 200 arranged in the x direction is all accommodated in the conductive shell 400 of the through hole 110.

[0188] Among them, a row of radiation units 200 arranged at intervals in the x direction can be provided on the reflector 100, or multiple rows of radiation units 200 can be provided, and the multiple rows of radiation units 200 are arranged at intervals in the y direction. Referring to Figure 8 and Figure 10 As shown, when there is a row of radiation units 200 on the reflector 100, the number of through holes 110 can be 1, and the through hole 110 can extend from one end of the reflector 100 in the x direction to the other end, so that the second ends of the row of radiation units 200 are all accommodated in the conductive shell 400 of the through hole 110. Among them, the second end of the radiation unit 200 faces the same direction as the second end of the balun 220.

[0189] When there are multiple rows of radiation units 200 on the reflector 100 (not shown in the figure), the number of through holes 110 can be multiple, and the multiple through holes 110 are arranged at intervals in the y direction, so that the multiple through holes 110 are arranged in one-to-one correspondence with the multiple rows of radiation units 200. For example, the second end of a row of radiation units 200 is located in one through hole 110, and the second end of another row of radiation units 200 is located in another through hole 110.

[0190] Among them, the conductive shell 400 is electrically connected to the reflector 100, and the other end of the common ground layer 221, for example, the second end of the common ground layer 221, is electrically connected to the conductive shell 400, so that the second end of the common ground layer 221 is electrically connected to the reflector 100, thereby ensuring that the common ground layer 221 is grounded. The second end of the common ground layer 221 can be understood as the side of the second part 2212 of the common ground layer 221 facing the reflector 100.

[0191] Referring to Figure 12 As shown, in specific settings, the conductive shell 400 may include a main body portion 410 and a connecting portion 420. The main body portion 410 is embedded in the through hole 110, and an opening 430 is formed on one side of the main body portion 410. At least a part of the balun 220 is located inside the main body portion 410, and one end of the balun 220 is connected to the inner wall of the main body portion 410 facing the opening 430.

[0192] Referring to Figure 12 and Figure 13 As shown, for example, a part of the phase shifter 310 is located inside the main body portion 410, and the second end of the common ground layer 221 of the balun 220 is electrically connected to the inner bottom wall of the main body portion 410 (referring to Figure 12 As shown). Among them, the inner bottom wall of the main body portion 410 faces the opening 430 of the main body portion 410.

[0193] Among them, the connecting portion 420 is arranged at one end of the main body portion 410 having the opening 430, and the connecting portion 420 abuts against the surface of the reflector 100 on the side facing the radiator. For example, the connecting portion 420 abuts against the first side surface of the reflector 100.

[0194] It can be understood that the connecting portion 420 can be bonded to the first side surface of the reflector 100 by conductive glue, or fixed to the first side surface of the reflector 100 by fasteners such as screws. The connection method between the connecting portion 420 and the reflector 100 is not limited here, as long as it is ensured that the connecting portion 420 is fixed on the reflector 100 and the connecting portion 420 is electrically connected to the reflector 100.

[0195] The embodiment of the present application further provides a communication device, including a radio frequency circuit and the antenna device in any of the above examples. Among them, the radio frequency circuit is electrically connected to the antenna device.

[0196] The RF circuit can provide a signal source for the antenna device. For example, the feeding member 311 of the antenna device is electrically connected to the first RF signal port in the RF circuit, so that RF signal transmission in the +45° polarization direction is achieved between the first RF signal port and the first feeding layer 222 in the antenna device. Correspondingly, the second feeding layer 223 of the antenna device is electrically connected to the second RF signal port in the RF circuit, so that RF signal transmission in the -45° polarization direction is achieved between the second RF signal port and the second feeding layer 223 in the antenna device.

[0197] Among them, the RF circuit is generally arranged in the remote radio unit. The specific circuit arrangement and working principle of the RF circuit can be directly referred to the relevant content of the prior art, which will not be elaborated here.

[0198] Exemplarily, the second ends of multiple first feeding members 3111 in the antenna device are electrically connected to the first RF signal port, so that the RF signal in the +45° polarization direction emitted from the first RF signal port is transmitted into the first feeding layer 222 of the antenna device, and then the radiation arm 210 at the first end of the first feeding layer 222 emits the signal in the form of electromagnetic waves outward, thus completing the signal transmission.

[0199] The communication device provided by the embodiment of the present application simplifies the structure of the antenna device, improves the assembly efficiency of the entire antenna device, and saves the manufacturing cost by electrically connecting the above antenna device to the RF circuit.

[0200] It should be noted that the communication device in the embodiment of the present application can also be a communication base station.

[0201] Embodiment 2

[0202] Figure 14 is a schematic structural diagram of another antenna device provided by an embodiment of the present application. Figure 15 is Figure 14 the right view of. Referring to Figure 14 and Figure 15 shown, different from Embodiment 1, in the radiation unit 200 of the embodiment of the present application, the second end of the balun 220 is suspended on one side of the reflector 100 to simplify the assembly process of the balun 220.

[0203] Specifically, the common ground layer 221 of the balun 220 is suspended on the reflector 100. In other words, the common ground layer 221 may not be grounded. For example, there is a gap 500 between the second end of the common ground layer 221 and the reflector 100. The remaining technical solutions of Embodiment 2 can be referred to Embodiment 1, which will not be elaborated here.

[0204] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0205] In the description of the embodiments of the present application, the terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims, and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

Claims

1. An antenna device, characterized in that, it includes a reflector, a radiation unit and a feeding network; the radiation unit is arranged on the reflector, the radiation unit includes a balun and at least two radiation arms located at one end of the balun, the balun includes a first feeding layer, a common ground layer and a second feeding layer arranged in sequence, and the feeding network includes a phase shifter, and the phase shifter includes a feeding member; one end of the common ground layer is electrically connected to one of the radiation arms, the other end of the common ground layer is electrically connected to the reflector, or the other end of the common ground layer is suspended on the reflector; one end of the first feeding layer and the second feeding layer is electrically connected to the other radiation arm, the other end of the first feeding layer is electrically connected to the feeding member, and the feeding member and the first feeding layer are an integral part.

2. The antenna device according to claim 1, characterized in that, the radiation unit has one balun.

3. The antenna device according to claim 1 or 2, characterized in that, there is a first air layer between the common ground layer and the first feeding layer, and there is a second air layer between the common ground layer and the second feeding layer; there is the first air layer between the feeding member and the common ground layer.

4. The antenna device according to claim 3, characterized in that, the phase shifter further includes a sliding medium, and at least part of the sliding medium is movably arranged on the side of the feeding member facing the common ground layer; when the sliding medium slides relative to the common ground layer, at least part of the sliding medium coincides with the first air layer.

5. The antenna device according to claim 4, characterized in that, the common ground layer includes a first part and a second part, the first part extends in a direction perpendicular to the reflector, and the second part extends in a direction parallel to the reflector; the first air layer includes a first horizontal air layer and a first vertical air layer that are interconnected, and there is the first vertical air layer between the first feeding layer and the first part; the second air layer includes a second horizontal air layer and a second vertical air layer that are interconnected, and there is the second vertical air layer between the second feeding layer and the first part; there is the first horizontal air layer between the feeding member and the second part, and at least part of the sliding medium coincides with the first horizontal air layer.

6. The antenna device according to claim 5, characterized in that, the antenna device includes a plurality of radiation units, and the plurality of radiation units are arranged at intervals on the reflector, wherein, among the plurality of radiation units arranged along the extending direction of the second part, the second parts of two adjacent common ground layers are an integral part.

7. The antenna device according to claim 3, characterized in that, the feeding network includes a first phase shifter and a second phase shifter, the first phase shifter includes a first feeding member, and the second phase shifter includes a second feeding member; The first feeding element and the first feeding layer are an integral part, and there is the first air layer between the first feeding element and the common ground layer. The second feeding element and the second feeding layer are an integral part, and there is the second air layer between the second feeding element and the common ground layer.

8. The antenna device according to any one of claims 4-6, characterized in that the feeding network includes a first phase shifter and a second phase shifter. The first phase shifter includes a first feeding element, and the second phase shifter includes a second feeding element; The first feeding element and the first feeding layer are an integral part, and there is the first air layer between the first feeding element and the common ground layer. The second feeding element and the second feeding layer are an integral part, and there is the second air layer between the second feeding element and the common ground layer.

9. The antenna device according to claim 7, characterized in that the first feeding element is a first feeding sheet, and the second feeding element is a second feeding sheet; the first feeding sheet and the first feeding layer are located in a first plane, and the second feeding sheet and the second feeding layer are located in a second plane; both the first plane and the second plane are perpendicular to the reflector of the antenna device.

10. The antenna device according to claim 8, characterized in that the first feeding element is a first feeding sheet, and the second feeding element is a second feeding sheet; the first feeding sheet and the first feeding layer are located in a first plane, and the second feeding sheet and the second feeding layer are located in a second plane; both the first plane and the second plane are perpendicular to the reflector of the antenna device.

11. The antenna device according to any one of claims 1-2, 4-7, 9-10, characterized in that the antenna device further includes a conductive shell with an opening on one side. The reflector has a through hole, and the conductive shell is embedded in the through hole. The opening faces the radiation arm. One end of the balun is connected to the radiation arm, and the other end of the balun is received in the conductive shell; The electrical connection of the other end of the common ground layer to the reflector includes: the other end of the common ground layer is electrically connected to the conductive shell, and the conductive shell is electrically connected to the reflector.

12. The antenna device according to claim 3, characterized in that the antenna device further includes a conductive shell with an opening on one side. The reflector has a through hole, and the conductive shell is embedded in the through hole. The opening faces the radiation arm. One end of the balun is connected to the radiation arm, and the other end of the balun is received in the conductive shell; The electrical connection of the other end of the common ground layer to the reflector includes: the other end of the common ground layer is electrically connected to the conductive shell, and the conductive shell is electrically connected to the reflector.

13. The antenna device according to claim 8, characterized in that the antenna device further includes a conductive shell with an opening on one side. The reflector has a through hole, and the conductive shell is embedded in the through hole. The opening faces the radiation arm. One end of the balun is connected to the radiation arm, and the other end of the balun is received in the conductive shell; The other end of the common ground layer is electrically connected to the reflector, which includes: the other end of the common ground layer is electrically connected to the conductive shell, and the conductive shell is electrically connected to the reflector.

14. The antenna device according to any one of claims 1-2, 4-7, 9-10 Characterized in that The balun includes an insulating body and three layers of sheet metal; The three layers of sheet metal are arranged at intervals, and the insulating body is provided between adjacent two layers of sheet metal, where The sheet metal in the middle is the common ground layer, and the sheet metals on both sides are the first feeding layer and the second feeding layer respectively.

15. The antenna device according to claim 3 Characterized in that The balun includes an insulating body and three layers of sheet metal; The three layers of sheet metal are arranged at intervals, and the insulating body is provided between adjacent two layers of sheet metal, where The sheet metal in the middle is the common ground layer, and the sheet metals on both sides are the first feeding layer and the second feeding layer respectively.

16. The antenna device according to claim 8 Characterized in that The balun includes an insulating body and three layers of sheet metal; The three layers of sheet metal are arranged at intervals, and the insulating body is provided between adjacent two layers of sheet metal, where The sheet metal in the middle is the common ground layer, and the sheet metals on both sides are the first feeding layer and the second feeding layer respectively.

17. The antenna device according to any one of claims 1-2, 4-7, 9-10, 12-13, 15-16 Characterized in that The number of the radiation units is multiple, and the multiple radiation units are arranged in an array; The phase shifter includes multiple feeding members, and the multiple feeding members are arranged in one-to-one correspondence with the baluns of the multiple radiation units.

18. The antenna device according to claim 3 Characterized in that The number of the radiation units is multiple, and the multiple radiation units are arranged in an array; The phase shifter includes multiple feeding members, and the multiple feeding members are arranged in one-to-one correspondence with the baluns of the multiple radiation units.

19. The antenna device according to claim 8 Characterized in that The number of the radiation units is multiple, and the multiple radiation units are arranged in an array; The phase shifter includes multiple feeding members, and the multiple feeding members are arranged in one-to-one correspondence with the baluns of the multiple radiation units.

20. The antenna device according to claim 11 Characterized in that The number of the radiation units is multiple, and the multiple radiation units are arranged in an array; The phase shifter includes multiple feeding members, and the multiple feeding members are arranged in one-to-one correspondence with the baluns of the multiple radiation units.

21. The antenna device according to claim 14 Characterized in that The number of the radiation units is multiple, and the multiple radiation units are arranged in an array; The phase shifter includes multiple feeding members, and the multiple feeding members are arranged in one-to-one correspondence with the baluns of the multiple radiation units.

22. A communication device Characterized in that It includes a radio frequency circuit and the antenna device according to any one of claims 1-21.

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