Phase shifter and base station antenna

Abstract

The application relates to a phase shifter and a base station antenna. A first adapter plate can replace a coaxial cable electrically connected with an output port to realize electrical connection with a radiation unit. After the first adapter plate replaces the coaxial cable, production efficiency can be improved, and the overall layout is simplified. In addition, since the first adapter plate passes through an insertion hole and extends into the cavity to realize electrical connection between the first transmission line and the output port, the size of the insertion hole is smaller than that of a window formed on the cavity, so that the stability of the phase shift circuit can be improved, and the stability and consistency of the antenna can be improved. In addition, since the second ground layer is electrically connected with the first ground layer to realize grounding, compared with the second ground layer adopting a coupled grounding mode, the stability of signal transmission can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mobile communication technology, in particular to a phase shifter and a base station antenna. BACKGROUND

[0002] In a cellular communication system, an electrically adjustable antenna with adjustable electric downtilt is a mainstream antenna used in current base station construction. The core components of the electrically adjustable antenna mainly include a main feeder, a phase shifter, a radiation unit and a reflector. Among them, the main component for realizing the electric downtilt adjustment function of the antenna is the phase shifter, the main feeder is connected to the phase shifter, and the phase shifter is connected to the radiation unit through a coaxial cable to form an entire antenna electric signal transmission network.

[0003] With the development of mobile communication, base station antennas are developing towards multi-band multi-standard, high integration, high gain, low loss and other directions, and the cavity stripline phase shifter is playing an increasingly important role. At present, the radiation unit and the phase shifter of the electrically adjustable antenna are usually connected through a coaxial cable, which makes the overall layout of the base station antenna more complex, most of the production processes related to the coaxial cable need to be completed by manual work, the batch production efficiency is low, and the stability and consistency of the antenna are poor. SUMMARY

[0004] Therefore, it is necessary to overcome the defects of the prior art and provide a phase shifter and a base station antenna which can improve the production efficiency, simplify the overall layout and have high stability and consistency.

[0005] A phase shifter, comprising:

[0006] a cavity, a first ground layer is arranged on the side wall of the cavity, and an insertion hole in communication with the inside of the cavity is arranged on the side wall of the cavity;

[0007] a phase shift circuit, the phase shift circuit is arranged in the inside of the cavity, and the phase shift circuit is provided with an output port; and

[0008] a first adapter plate, the first adapter plate is provided with a first transmission line and a second ground layer, the first transmission line and the second ground layer are arranged on two opposite sides of the first adapter plate respectively, the first adapter plate penetrates the insertion hole and extends into the inside of the cavity, the first transmission line is electrically connected with the output port, and the second ground layer is electrically connected with the first ground layer.

[0009] In one of the embodiments, the hole wall of the insertion hole is attached to the plate surface of the first adapter plate, or the hole wall of the insertion hole and the plate surface of the first adapter plate are provided with a spacing, the plate thickness of the first adapter plate is d, and the spacing is less than or equal to 2d and greater than 0.

[0010] In one of the embodiments, the first transmission line is welded, clamped, abutted or fastened with the output port; and / or, the second ground layer is welded, clamped, abutted or fastened with the first ground layer.

[0011] In one of the embodiments, the side wall of the cavity is further provided with an operation port in communication with the inside of the cavity, and the operation port is arranged opposite to the output port.

[0012] In one of the embodiments, the operation port is located on one side of the first adapter plate.

[0013] In one of the embodiments, the phase shift circuit is a dual-polarized phase shift circuit, the output port includes two output ports with different polarizations, and the first adapter plate includes two first transmission lines, and the two first transmission lines are electrically connected to the two output ports with different polarizations one by one.

[0014] In one of the embodiments, the phase shifter further includes two phase shift medium plates movably arranged in the cavity, and the two phase shift medium plates are arranged on opposite sides of the phase shift circuit.

[0015] A base station antenna including the phase shifter, the base station antenna further includes a radiating unit, and the first transmission line is electrically connected to the radiating unit.

[0016] In one of the embodiments, the base station antenna further includes a second adapter plate, the second adapter plate is provided with a second transmission line and a third ground layer, and the second transmission line and the third ground layer are arranged on two opposite sides of the second adapter plate; the second adapter plate is connected to the first adapter plate, the first transmission line is electrically connected to a radiating arm of the radiating unit through the second transmission line, a balun of the radiating unit is electrically connected to the third ground layer, and the third ground layer is further electrically connected to the second ground layer.

[0017] In one of the embodiments, the base station antenna further includes a reflecting plate; the second adapter plate and the radiating unit are located above the reflecting plate, and the second adapter plate is attached to the reflecting plate; the first adapter plate is connected to the second adapter plate after penetrating through the reflecting plate; and the cavity is located below the reflecting plate.

[0018] In one embodiment, there are multiple radiating units, multiple first adapter plates, and multiple second adapter plates; the multiple first adapter plates are arranged in a one-to-one correspondence with the multiple second adapter plates, and the multiple second adapter plates are arranged in a one-to-one correspondence with the multiple radiating units; there are multiple insertion holes arranged sequentially at intervals along the longitudinal direction of the cavity, and the multiple first adapter plates are also arranged in a one-to-one correspondence with the multiple insertion holes; the phase shifting circuit has multiple output ports, and the multiple first adapter plates are also arranged in a one-to-one correspondence with the multiple output ports.

[0019] In one embodiment, a plurality of the radiating elements are arranged in an array, and the plurality of radiating elements constituting the array are arranged coaxially or non-coaxially on the reflector.

[0020] The aforementioned phase shifter and base station antenna, because the first transmission line serves to transmit electrical signals, function similarly to the inner conductor of a coaxial cable. The second grounding layer is electrically connected to the first grounding layer to achieve grounding, functioning similarly to the outer conductor of a coaxial cable. That is, the first adapter plate can replace the coaxial cable electrically connected to the output port to achieve electrical connection with the radiating unit. Thus, replacing the coaxial cable with the first adapter plate improves production efficiency and simplifies the overall layout. Furthermore, since the first adapter plate passes through the insertion hole and extends into the cavity to achieve electrical connection between the first transmission line and the output port, the insertion hole is smaller than the opening on the cavity, thereby improving the stability of the phase shifting circuit and thus improving the stability and consistency of the antenna. Additionally, because the second grounding layer is electrically connected to the first grounding layer to achieve grounding, compared to using a coupled grounding method for the second grounding layer, the stability of signal transmission is improved. Attached Figure Description

[0021] Figure 1 This is a structural diagram of a phase shifter according to an embodiment of this application.

[0022] Figure 2 for Figure 1 The diagram shows an enlarged view of the phase shifter at point A.

[0023] Figure 3 This is a structural diagram of a base station antenna according to an embodiment of this application.

[0024] Figure 4 for Figure 3 The diagram shows the exploded structure of the base station antenna.

[0025] Figure 5 for Figure 4 The diagram shows an enlarged view of the structure at point B.

[0026] Figure 6 for Figure 3The structure diagram of the base station antenna shown after the reflection plate is hidden.

[0027] Figure 7 For Figure 6 The structure diagram of the base station antenna shown after the reflection plate is hidden.

[0028] Figure 8 The structure diagram of the four first switching plates of the base station antenna of an embodiment of the present application.

[0029] Figure 9 The structure diagram of the four second switching plates of the base station antenna of an embodiment of the present application.

[0030] 10, phase shifter; 11, cavity; 111, insertion hole; 112, operation port; 12, phase shift circuit; 13, first switching plate; 131, first transmission line; 132, card port; 141, first solder; 142, second solder; 143, third solder; 20, radiation unit; 30, second switching plate; 31, second transmission line; 40, reflection plate. DETAILED DESCRIPTION

[0031] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a sufficient understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0032] Reference Figure 1 With Figure 2 , Figure 1 The structure diagram of the phase shifter 10 of an embodiment of the present application is shown. Figure 2 The structure diagram of the phase shifter 10 of an embodiment of the present application is shown. Figure 1 The enlarged structure diagram of the phase shifter 10 shown at A. An embodiment of the present application provides a phase shifter 10, which includes a cavity 11, a phase shift circuit 12 and a first switching plate 13.

[0033] The side wall of the cavity 11 is provided with an insertion hole 111 communicating with the inside of the cavity 11, and the side wall of the cavity 11 is further provided with a first ground layer. The cavity 11 can be processed by using a dielectric material, such as a ceramic material. The first ground layer includes but is not limited to being formed on the side wall of the cavity 11 by various means such as plating, printing, 3D printing, etc. The first ground layer can be arranged on the outer wall of the cavity 11, on the inner wall of the cavity 11, or on both the inner wall and the outer wall of the cavity 11, which is not limited herein.

[0034] Of course, the cavity 11 can also be processed from a metal material, that is, the first ground layer is integrated with the cavity 11.

[0035] In addition, the phase shift circuit 12 is arranged in the cavity 11, and the phase shift circuit 12 is provided with an input port and an output port. The input port is connected with the main feeder, for example, and the signal of the main feeder is input to the phase shift circuit 12 through the input port, and is output to the output port by the phase shift circuit 12, and the feeding signal is transmitted to the radiation unit 20 through the output port and the first adapter plate 13.

[0036] Specifically, the side wall of the cavity 11 is provided with an opening communicating with the inside thereof, and the opening corresponds to the position of the input port. The main feeder is connected with the input port in an electrically connected manner after being inserted into the cavity 11 through the opening. Alternatively, the main feeder includes but is not limited to being formed on an input circuit board. After the input circuit board is inserted into the cavity 11 through the opening, the main feeder is connected with the input port in a welding manner or other various connection and fixing manners.

[0037] In an embodiment, the phase shifter 10 further includes a substrate arranged in the cavity 11. The substrate is made of plastic or ceramic material, for example, and serves as a carrier of the phase shift circuit 12, so that the phase shift circuit 12 is connected to the substrate. Alternatively, the phase shift circuit 12 can be formed on the substrate by a printed circuit board process, or can be arranged on the substrate by various ways such as 3D printing or sputtering. In addition, the phase shift circuit 12 can be only a conductive circuit and be integrally processed by a sheet metal process.

[0038] The first adapter plate 13 is provided with a first transmission line 131 and a second ground layer. The first transmission line 131 can be referred to as shown in the figure. Since the first transmission line 131 and the second ground layer are arranged on the two opposite sides of the first adapter plate 13, the first transmission line 131 and the second ground layer cooperate to form a microstrip line structure, which plays the role of a coaxial cable. The first transmission line 131 can be various shapes, including but not limited to regular shapes such as L-shaped, S-shaped, Z-shaped, C-shaped and other irregular shapes, which can be flexibly adjusted and arranged according to actual needs. Figure 8 Since the first transmission line 131 and the second ground layer are arranged on the two opposite sides of the first adapter plate 13, the first transmission line 131 and the second ground layer cooperate to form a microstrip line structure, which plays the role of a coaxial cable. The first transmission line 131 can be various shapes, including but not limited to regular shapes such as L-shaped, S-shaped, Z-shaped, C-shaped and other irregular shapes, which can be flexibly adjusted and arranged according to actual needs.

[0039] In some embodiments, the first adapter plate 13 includes but is not limited to a circuit board made of a printed circuit board process, and can also be made of plastic or ceramic material as a carrier of the first transmission line 131 layer and the second ground layer, and the first transmission line 131 layer and the second ground layer are formed on the carrier by other circuit manufacturing methods.

[0040] Please refer to Figure 2 and Figure 8The first adapter plate 13 extends into the cavity 11 through the insertion hole 111, and the first transmission line 131 is electrically connected with the output port. Specifically, the first transmission line 131 and the output port can be connected by welding, clamping, abutting, or using screws, pins, or other fasteners, as long as they can be electrically connected. In this embodiment, the first transmission line 131 is connected with the output port by welding through the first solder 141, and has good conductivity.

[0041] In addition, the second ground layer is electrically connected with the first ground layer. Specifically, the second ground layer and the first ground layer can be connected by welding, clamping, abutting, or using screws, pins, or other fasteners, as long as they can be electrically connected. In this embodiment, the second ground layer is connected with the first ground layer by welding through the second solder 142, and has good conductivity.

[0042] The above-mentioned phase shifter 10, because the first transmission line 131 plays a role in transmitting electrical signals, and has the same effect as the inner conductor of the coaxial cable. The second ground layer is electrically connected with the first ground layer to achieve grounding, and has the same effect as the outer conductor of the coaxial cable. That is, the first adapter plate 13 can replace the coaxial cable electrically connected with the output port to achieve electrical connection with the radiating unit 20. In this way, by replacing the coaxial cable with the first adapter plate 13, the production efficiency can be improved, and the overall layout is simplified. In addition, because the first adapter plate 13 extends into the cavity 11 through the insertion hole 111 to achieve electrical connection between the first transmission line 131 and the output port, the size of the insertion hole 111 is smaller than the window on the cavity 11, thereby improving the stability of the phase shift circuit 12 and the stability and consistency of the antenna. In addition, because the second ground layer is electrically connected with the first ground layer to achieve grounding, compared with the second ground layer using a coupled ground, the stability of signal transmission can be improved.

[0043] Please refer to Figure 2 In some embodiments, the hole wall of the insertion hole 111 is attached to the plate surface of the first adapter plate 13, so that the area of the phase shift circuit 12 exposed outside the cavity 11 through the insertion hole 111 is small, and the stability of the phase shift circuit 12 is improved. In this case, the thickness d of the first adapter plate 13 is equal to the distance between the two hole walls of the insertion hole 111, so that during the assembly of the phase shifter 10, the first adapter plate 13 needs to be accurately positioned with the insertion hole 111 before it can be inserted into the insertion hole 111 and extend into the cavity 11.

[0044] In some other embodiments, the hole wall of the insertion hole 111 is spaced apart from the plate surface of the first adapter plate 13. The plate thickness of the first adapter plate 13 is d. Wherein, the spacing is less than or equal to 2d, and is specifically, for example, 2d, 1.5d, d, 0.5d, or 0.3d, and the like. In this way, the spacing is appropriately set, on the one hand, the spacing is not too large to reduce the stability of the phase shift circuit 12, and on the other hand, when the spacing is greater than 0, the requirement for the positioning accuracy in the assembly operation can be reduced, thereby improving the assembly efficiency.

[0045] Of course, in some other embodiments, the spacing can also be greater than 2d, and is set to be 3d, 5d, or 10d, and the like.

[0046] Please refer to Figure 2 In one embodiment, the side wall of the cavity 11 is further provided with an operation port 112 which is in communication with the inside thereof. The operation port 112 is arranged opposite to the output port position. In this way, the connection operation of the output port and the first transmission line 131 can be facilitated through the operation port 112, for example, the first transmission line 131 can be welded and fixed to the output port.

[0047] Wherein, the opening area of the operation port 112 is as small as possible, as long as the operation tool can enter the inside of the cavity 11 to realize the connection operation of the first transmission line 131 and the output port. Optionally, the spacing between the two points where the straight line passing through the center of the operation port 112 intersects with the contour of the operation port 112 is set to be L, and L is less than or equal to 30mm, and is specifically, for example, 30mm, 20mm, 15mm, or 10mm, and the like.

[0048] In one embodiment, the operation port 112 is located on one side of the first adapter plate 13. In this way, the opening area of the operation port 112 can be reduced, and the opening area is not too large to reduce the stability of the phase shift circuit 12. In addition, the specific opening position of the operation port 112 can be flexibly adjusted and set according to the actual demand, as long as the connection operation of the output port and the first transmission line 131 is satisfied.

[0049] Wherein, the phase shift circuit 12 can be set as a single-polarized phase shift circuit, or can be set as a dual-polarized phase shift circuit, and is specifically matched with the radiating unit 20. In the present embodiment, the phase shift circuit 12 is taken as a dual-polarized phase shift circuit as an example, and the output port includes two output ports with different polarizations. The first transmission line 131 on the first adapter plate 13 corresponds to two. The two first transmission lines 131 are electrically connected to the two output ports with different polarizations one by one.

[0050] Specifically, the two output ports of different polarizations are arranged on opposite sides of the substrate. The first adapter plate 13 is provided with a clamping interface 132, and the two first transmission lines 131 are located on opposite sides of the clamping interface 132. The first adapter plate 13 is clamped and mounted on the substrate through the clamping interface 132, thereby stably mounted on the substrate. In addition, when the first adapter plate 13 is clamped and mounted on the substrate, the two first transmission lines 131 correspond to and are electrically connected to the two output ports of different polarizations.

[0051] On the basis of the foregoing embodiments, the cavity 11 is provided with operation openings 112 on opposite sides, and the two operation openings 112 are arranged in position correspondence with the two output ports of different polarizations. In this way, in the assembly step of the phase shifter 10, the two operation openings 112 on opposite sides of the cavity 11 can facilitate the connection operation of the staff to connect each output port to each first transmission line 131 in the corresponding position.

[0052] In an embodiment, the phase shifter 10 further comprises two phase-shifting medium plates movably arranged inside the cavity 11. The two phase-shifting medium plates are arranged on opposite sides of the phase-shifting circuit 12. In this way, when the phase-shifting medium plates are adjusted in position along the longitudinal direction of the barrel, the phase can be adjusted.

[0053] Please refer to Figures 3 to 7 In an embodiment, the phase shifter 10 of any of the foregoing embodiments is further provided in the embodiment of the application. The base station antenna further comprises a radiation unit 20, and the first transmission line 131 is electrically connected to the radiation unit 20.

[0054] The base station antenna described above, since the first transmission line 131 plays the role of transmitting electrical signals, and has the same effect as the inner conductor of the coaxial cable. The second ground layer is electrically connected to the first ground layer to realize grounding, and has the same effect as the outer conductor of the coaxial cable. That is, the first adapter plate 13 can replace the coaxial cable electrically connected to the output port to realize electrical connection with the radiation unit 20. In this way, by replacing the coaxial cable with the first adapter plate 13, the production efficiency can be improved, and the overall layout is simplified. In addition, since the first adapter plate 13 is inserted through the insertion hole 111 and extends into the cavity 11 to realize electrical connection between the first transmission line 131 and the output port, the size of the insertion hole 111 is smaller than that of the window on the cavity 11, thereby improving the stability of the phase-shifting circuit 12 and the stability and consistency of the antenna. In addition, since the second ground layer is electrically connected to the first ground layer to realize grounding, compared with the coupling grounding mode of the second ground layer, the stability of signal transmission can be improved.

[0055] Please refer to Figures 7 to 9In one embodiment, the base station antenna further comprises a second adapter plate 30. The second adapter plate 30 is provided with a second transmission line 31 and a third ground layer. The second transmission line 31 and the third ground layer are respectively arranged on two opposite sides of the second adapter plate 30. Specifically, the second transmission line 31 can be of various shapes, including but not limited to regular shapes such as L-shape, S-shape, Z-shape, C-shape and irregular shapes. Figure 8 As shown in FIG. 1, the second transmission line 31 and the third ground layer are respectively arranged on two opposite sides of the second adapter plate 30, so that the second transmission line 31 and the third ground layer cooperatively form a microstrip line structure, which functions as a coaxial cable. Similar to the first transmission line 131, the second transmission line 31 can be of various shapes, including but not limited to regular shapes such as L-shape, S-shape, Z-shape, C-shape and irregular shapes, which can be flexibly adjusted and arranged according to actual needs.

[0056] In addition, the second adapter plate 30 is connected to the first adapter plate 13, the first transmission line 131 is electrically connected to the radiating arm of the radiating unit 20 through the second transmission line 31, the balun of the radiating unit 20 is electrically connected to the third ground layer, and the third ground layer is further electrically connected to the second ground layer. In this way, since the second adapter plate 30 is arranged between the radiating unit 20 and the first adapter plate 13, the electrical connection of the phase shifter 10, the first adapter plate 13, the second adapter plate 30 and the radiating unit 20 can be easily achieved. In addition, similar to the first adapter plate 13, the second adapter plate 30 also functions as a coaxial cable. After being combined with the first adapter plate 13, the length of the coaxial cable is increased, and the phase adjustment of the radiating unit 20 can be achieved by adjusting and arranging the electrical length of the first transmission line 131 and / or the second transmission line 31.

[0057] In some embodiments, one end of the first transmission line 131 is connected to the output port, and the other end of the first transmission line 131 is connected to the second transmission line 31 through welding, clamping, abutting or using fasteners such as screws, pins and the like, as long as the electrical connection between the first transmission line 131 and the second transmission line 31 can be achieved. In this embodiment, the first transmission line 131 is connected and fixed to the second transmission line 31 by welding through the third solder 143, which has good electrical conductivity.

[0058] Specifically, the plate surface of the first adapter plate 13 is arranged along the vertical direction, and the plate surface of the second adapter plate 30 is arranged along the horizontal direction. After the bottom end of the first adapter plate 13 is inserted into the cavity 11 through the insertion hole 111, one end of the first transmission line 131 is electrically connected to the output port. The top end of the first adapter plate 13 is connected to the second adapter plate 30, so that the other end of the first transmission line 131 is electrically connected to the second transmission line 31. In this way, the phase shifter circuit 12, the first adapter plate 13 and the second adapter plate 30 can be stably assembled together.

[0059] Please refer to Figures 3 to 5 In one embodiment, the base station antenna further comprises a reflector plate 40. The second adapter plate 30 and the radiating element 20 are both located above the reflector plate 40, and the second adapter plate 30 is attached to the reflector plate 40. The first adapter plate 13 is connected to the second adapter plate 30 after penetrating through the reflector plate 40. The cavity 11 is located below the reflector plate 40.

[0060] In one embodiment, the radiating element 20 is provided in plurality, and the first adapter plate 13 is provided in plurality, with each of the plurality of first adapter plates 13 corresponding to one of the plurality of radiating elements 20. In addition, the plurality of first adapter plates 13 also correspond to the plurality of insertion holes 111, which are arranged in sequence along the length direction of the cavity 11. The phase shift circuit 12 is provided with a plurality of output ports, and the plurality of first adapter plates 13 also correspond to the plurality of output ports.

[0061] In one specific embodiment, when the radiating element 20 is provided as a single-polarized radiating element, the first transmission line 131 on the first adapter plate 13 is provided as one, and the output ports of the phase shift circuit 12 are all output ports of the same polarization. Each output port is electrically connected to a corresponding first transmission line 131. Each first transmission line 131 is electrically connected to a corresponding radiating element 20.

[0062] In one specific embodiment, when the radiating element 20 is provided as a dual-polarized radiating element, the first transmission line 131 on the first adapter plate 13 is provided as two, and the two first transmission lines 131 are connected to two different polarized feeders of the dual-polarized radiating element 20. In addition, the output ports of the phase shift circuit 12 include two different polarized output ports, such as +45° polarization and -45° polarization, and the two different polarized output ports are electrically connected to the two first transmission lines 131 of the first adapter plate 13.

[0063] On the basis of the foregoing embodiments, the second adapter plate 30 is provided in plurality, and the plurality of second adapter plates 30 are connected to the plurality of first adapter plates 13 one by one.

[0064] On the basis of the foregoing embodiments, the plurality of radiating elements 20 are arranged in an array. The second transmission line 31 is provided with a connection point for connecting to the radiating element 20, such as at the end of the second transmission line 31. Since the second transmission line 31 and the connection point can be flexibly adjusted on the second adapter plate 30, the arrangement position of the radiating element 20 on the reflector plate 40 can be adjusted accordingly when the position of the connection point is adjusted. Specifically, when each connection point is arranged coaxially, the plurality of radiating elements 20 forming the array are arranged coaxially on the reflector plate 40 accordingly; when each connection point is not arranged coaxially, the plurality of radiating elements 20 forming the array are arranged non-coaxially on the reflector plate 40 accordingly.

[0065] Please refer to Figure 8 and Figure 9 In some embodiments, the length and width of the two first transmission lines 131 of the first adapter plate 13 are consistent, and the length and width of the two second transmission lines 31 of the second adapter plate 30 are consistent.

[0066] In addition, for each first transmission line 131 on different first adapter plates 13, the length and width of each first transmission line 131 can be the same or different, which can be flexibly adjusted and set according to actual needs; similarly, for each second transmission line 31 on different second adapter plates 30, the length and width of each second transmission line 31 can be the same or different, which can be flexibly adjusted and set according to actual needs. In this way, different phase changes and impedance matching can be achieved, and the array antenna is more flexible in shaping and design, and is more widely applicable.

[0067] In the description of the present application, it should be understood that if these terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like appear, these terms indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0068] In addition, if these terms “first”, “second” appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features with “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present application, if the term “multiple” appears, the meaning of “multiple” is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0069] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0070] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0071] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation.

[0072] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0073] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A phase shifter, characterized by, The phase shifter comprises: a cavity, a side wall of the cavity is provided with an insertion hole in communication with the inside of the cavity, and the side wall of the cavity is further provided with a first ground layer; a phase shift circuit, which is arranged in the inside of the cavity and is provided with an output port; and a first adapter plate, which is provided with a first transmission line and a second ground layer, the first transmission line and the second ground layer are respectively arranged on two opposite sides of the first adapter plate, the first adapter plate extends into the inside of the cavity through the insertion hole, the first transmission line is electrically connected with the output port, and the second ground layer is electrically connected with the first ground layer.

2. The phase shifter of claim 1, wherein The hole wall of the insertion hole is attached to the plate surface of the first adapter plate, or the hole wall of the insertion hole and the plate surface of the first adapter plate are provided with a spacing, the plate thickness of the first adapter plate is d, and the spacing is less than or equal to 2d and greater than 0.

3. The phase shifter of claim 1, wherein The first transmission line and the output port are connected by welding, clamping, abutting or using fasteners, and / or the second ground layer and the first ground layer are connected by welding, clamping, abutting or using fasteners.

4. The phase shifter of claim 3, wherein, The side wall of the cavity is further provided with an operation port in communication with the inside of the cavity, and the operation port is arranged opposite to the output port.

5. The phase shifter of claim 4, wherein, The operation port is located on one side of the first adapter plate.

6. The phase shifter of claim 1, wherein, The phase shift circuit is a dual-polarized phase shift circuit, the output port comprises two output ports with different polarizations, the first transmission line on the first adapter plate is two, and the two first transmission lines are electrically connected with the two output ports with different polarizations one by one.

7. The phase shifter of claim 1, wherein The phase shifter further comprises two phase shift medium plates movably arranged in the inside of the cavity, and the two phase shift medium plates are arranged on opposite sides of the phase shift circuit.

8. A base station antenna, comprising: The base station antenna comprises the phase shifter according to any one of claims 1 to 7, and further comprises a radiation unit, the first transmission line is electrically connected with the radiation unit.

9. The base station antenna of Claim 8, wherein, The base station antenna further comprises a second adapter plate, the second adapter plate is provided with a second transmission line and a third ground layer, the second transmission line and the third ground layer are respectively arranged on two opposite sides of the second adapter plate; the second adapter plate is connected with the first adapter plate, the first transmission line is electrically connected with a radiation arm of the radiation unit through the second transmission line, a balun of the radiation unit is electrically connected with the third ground layer, and the third ground layer is further electrically connected with the second ground layer.

10. The base station antenna of Claim 9, wherein, The base station antenna further comprises a reflecting plate, the second adapter plate and the radiation unit are located above the reflecting plate, the second adapter plate is attached to the reflecting plate, the first adapter plate is connected with the second adapter plate after penetrating through the reflecting plate, and the cavity is located below the reflecting plate.

11. The base station antenna of Claim 10, wherein, The radiation units are provided in plurality, the first adapter plates are provided in plurality, and the second adapter plates are provided in plurality; the first adapter plates and the second adapter plates are provided in one-to-one correspondence in plurality, and the second adapter plates and the radiation units are provided in one-to-one correspondence in plurality; the insertion holes are provided in plurality and are arranged in sequence and at intervals along the length direction of the cavity, and the first adapter plates are provided in one-to-one correspondence with the insertion holes in plurality; the phase-shifting circuit is provided with output ports in plurality, and the first adapter plates are provided in one-to-one correspondence with the output ports in plurality.

12. The base station antenna of Claim 11, further characterized by, The radiation units are arranged in array, and the radiation units in array are arranged coaxially or non-coaxially on the reflecting plate.

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