CN117276889A - Phase shifter and base station antenna - Google Patents
Phase shifter and base station antenna Download PDFInfo
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- CN117276889A CN117276889A CN202311460135.1A CN202311460135A CN117276889A CN 117276889 A CN117276889 A CN 117276889A CN 202311460135 A CN202311460135 A CN 202311460135A CN 117276889 A CN117276889 A CN 117276889A
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- 238000009413 insulation Methods 0.000 claims abstract description 17
- 230000005855 radiation Effects 0.000 claims description 28
- 238000005192 partition Methods 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000009977 dual effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005404 monopole Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/50—Fixed connections
- H01R12/51—Fixed connections for rigid printed circuits or like structures
- H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
- H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/32—Conductive members located in slot or hole in screw
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The invention relates to a phase shifter and a base station antenna. The phase shifter includes: the cavity assembly is internally provided with a phase shifting cavity; the fixed circuit board is arranged in the phase shifting cavity and is provided with a signal output end; the feed rod penetrates through the cavity assembly and is electrically insulated from the cavity assembly, the feed rod comprises an insulation section and a conductive section connected with the insulation section, the insulation section is fixedly connected with the cavity assembly, a part of structure of the conductive section is located in the phase shifting cavity and is in contact with the signal output end, and the other part of structure of the conductive section extends out of the phase shifting cavity. The phase shifter and the base station antenna can realize electroplating-free of the fixed circuit board, are easy to connect and have higher assembly efficiency.
Description
Technical Field
The present invention relates to the field of antenna communications technologies, and in particular, to a phase shifter and a base station antenna.
Background
Base station antennas are an important component of mobile communication networks, and the performance of the base station antennas directly affects the network coverage performance. The current feed network solution of the main stream of base station antennas is: the phase shifter with metal cavity is used to distribute power and shift phase, and coaxial cable is used to connect the signal output end of the phase shifter with the radiation unit. Specifically, the phase shifter comprises a cavity and a fixed circuit board positioned in the cavity, and when the phase shifter is connected, the coaxial cable needs to extend into the cavity and is connected with a signal output end of the fixed circuit board through welding. For this reason, the plating process is required for fixing the circuit board, however, the waste water generated by the plating may pollute the environment, and the soldering process operation of the coaxial cable is also complicated, resulting in lower assembly efficiency.
Disclosure of Invention
Based on this, this application provides a exempt from to electroplate, easily connects, phase shifter and base station antenna that assembly efficiency is higher.
A first aspect of an embodiment of the present application provides a phase shifter, including:
the cavity assembly is internally provided with a phase shifting cavity;
the fixed circuit board is arranged in the phase shifting cavity and is provided with a signal output end;
the feed rod penetrates through the cavity assembly and is electrically insulated from the cavity assembly, the feed rod comprises an insulation section and a conductive section connected with the insulation section, the insulation section is fixedly connected with the cavity assembly, a part of structure of the conductive section is located in the phase shifting cavity and is in contact with the signal output end, and the other part of structure of the conductive section extends out of the phase shifting cavity.
In one embodiment, the cavity assembly comprises a reflecting plate and a shell connected with the reflecting plate, and the insulating section is fixedly connected with the shell;
the housing and the reflective plate together define a phase shifting cavity. Therefore, the shell is formed into the half-cavity structure, so that the material can be effectively saved, the weight is reduced, and the miniaturization and the light weight design of the antenna are facilitated.
In one embodiment, the insulating segment is removably secured to the housing. In this way, the assembly of the insulating section and the housing is facilitated.
In one embodiment, the housing is provided with a first mounting hole, and the insulating section is in clamping fit or threaded connection with the first mounting hole.
In one embodiment, the reflecting plate is provided with a first avoidance hole, the conductive section penetrates through the first avoidance hole, and the conductive section is spaced from the hole wall of the first avoidance hole. Insulation of the conductive segments from the reflector plate can be achieved in this way.
In one embodiment, the surface of the conductive segment is further provided with a conductive plane, and the conductive plane extends towards and abuts against the signal output end. This facilitates a more reliable contact between the conductive plane and the signal output when the feed rod is inserted into the cavity assembly.
In one embodiment, a protruding part is arranged at one end of the conductive section facing the insulating section, and a conductive plane is formed on the surface of the protruding part facing the fixed circuit board; the signal output end is arranged on the surface of the fixed circuit board facing the insulation section;
the fixed circuit board is provided with a second avoidance hole, and the conductive section also penetrates through the second avoidance hole so that the conductive plane is abutted to the signal output end. This facilitates a more reliable contact between the conductive plane and the signal output when the feed rod is inserted into the cavity assembly.
In one embodiment, the phase shifter further includes a positioning block configured as an insulating member, and the positioning block is clamped between the reflection plate and the fixed circuit board;
the conductive section sequentially penetrates through the fixed circuit board, the positioning block and the reflecting plate. In this way, the fixed circuit board can be clamped between the positioning block and the conductive plane of the conductive segment, thereby achieving a relative fixation with the housing.
In one embodiment, a partition board is further arranged in the shell to divide the phase-shifting cavity into two cavities, the fixed circuit board comprises two sub circuit boards, each sub circuit board is provided with one signal output end, and the number of the feed rods is two and is in one-to-one correspondence with the signal output ends;
the signal output end of one of the sub-circuit boards is used for being electrically connected with one feed structure of the radiating unit; the signal output end of the other sub-circuit board is used for being electrically connected with the other feed structure of the radiating unit;
each chamber is provided with a group of corresponding sub-circuit boards and feed rods.
In one embodiment, the top of the shell is provided with a flanging part, and the flanging part is abutted against the reflecting plate and is connected with the reflecting plate through a first fastener. In this way, the housing and the reflection plate are easily connected.
In one embodiment, an insulating buffer pad is sandwiched between the baffle plate and the reflecting plate, and an insulating buffer pad is also sandwiched between the flange portion and the reflecting plate. So that the flange part and the reflecting plate can be bonded without gaps as much as possible in a state that the surfaces of the flange part and the reflecting plate are uneven.
In one embodiment, the housing is further coupled to the reflective plate by a second fastener. This can further improve the connection strength.
In one embodiment, the second fastener is configured as a conductor, the second fastener is in contact with the reflective plate, and the second fastener is in contact with the housing; therefore, the reflecting plate is electrically connected with the shell, and the electric common ground is realized.
The reflecting plate is also used for electrically or coupled connection with the balun of the radiating element. This allows for electrical or coupling connection between the housing and the balun, as well as for an electroplating-free process of the housing 20.
A second aspect of the embodiments of the present application provides a base station antenna, including a radiation unit and the foregoing phase shifter;
the radiating element includes a feed structure electrically connected to the conductive segment of the feed rod.
In one embodiment, the radiating element comprises a feed structure receiving cavity, and the conductive segment comprises a first portion extending outside the phase shifting cavity, the first portion being plugged into the feed structure receiving cavity to electrically connect with a feed structure of a corresponding radiating element. So make the feed pole connect to the radiating element with the grafting mode, connect simply, also improved assembly efficiency.
In one embodiment, the base station antenna further comprises a feed signal board, and a feed signal line is further arranged on the feed signal board;
the feed signal board is arranged outside the cavity assembly, the conductive section comprises a first part extending out of the phase shifting cavity, and the first part is electrically connected with the feed structure of the corresponding radiation unit through a feed signal line. The arrangement can flexibly adjust the electric connection position of the feed rod and the radiating unit, and can also conveniently adjust the impedance matching.
The phase shifter and the base station antenna have the beneficial effects that:
the part of the structure of the conductive section through the feed rod is positioned in the phase shifting cavity and is in contact with the signal output end, so that the conductive section is electrically connected with the signal output end, and the other part of the structure of the conductive section extends out of the phase shifting cavity, so that an electric signal of the fixed circuit board is led out of the phase shifting cavity through the conductive section for connection use of the radiating unit.
And run through the feed rod and set up in cavity subassembly, insulating section and cavity subassembly fixed connection can be with electrically conductive section and cavity subassembly relatively fixed, simultaneously, electrically conductive section at least partial structure is located and phase shifts the cavity and contact with the signal output part for electrically conductive section realizes the electric connection of two through with the signal output part direct contact. In other words, in the embodiment of the application, only the feed rod is required to be inserted into the cavity assembly, so that at least part of the structure of the conductive section is contacted with the signal output end of the fixed circuit board, and the other part of the structure of the conductive section extends out of the phase-shifting cavity, so that an electric signal of the fixed circuit board can be led out of the phase-shifting cavity, a process of welding the coaxial cable extending into the cavity from the outer side of the cavity to the signal output end of the fixed circuit board in the related art is omitted, the connecting process is simple and reliable, the assembly efficiency and consistency are improved, and the coaxial cable is not required to be welded with the signal output end of the fixed circuit board, so that the fixed circuit board can realize electroplating-free.
In addition, as the signal output end of the fixed circuit board directly leads out signals through the feed rod, compared with a coaxial cable, the transmission loss can be reduced, the antenna gain is increased, and the requirements of high efficiency, low carbon and green development of the base station are met.
Drawings
FIG. 1 is a schematic cross-sectional view of a phase shifter provided in an embodiment of the present application;
FIG. 2 is an enlarged schematic view of a portion of a feed rod connected to a cavity assembly in a phase shifter according to an embodiment of the present disclosure;
fig. 3 is an exploded view of a phase shifter according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a feed rod in the phase shifter according to the embodiment of the present application;
fig. 5 is a schematic structural diagram of a connection between a phase shifter and a radiation unit according to an embodiment of the present disclosure;
FIG. 6 is a cross-sectional view of a phase shifter provided in an embodiment of the present application;
fig. 7 is a schematic structural diagram of a base station antenna according to an embodiment of the present application;
fig. 8 is a schematic diagram of another structure of a base station antenna according to an embodiment of the present application.
Reference numerals illustrate:
100. a phase shifter; 101. a cavity assembly; 10. a reflection plate; 11. a first avoidance hole; 20. a housing; 201. a first mounting hole; 202. an opening; 203. a burring part; 204. a first fastener; 205. an insulating buffer pad; 206. a second fastener; 207. a bottom wall; 208. a sidewall; 21. a phase shifting cavity; 22. a partition plate; 30. fixing the circuit board; 301. a sub-circuit board; 31. a signal output terminal; 32. a second avoidance hole; 40. a positioning block; 50. a feed rod; 51. a conductive segment; 510. a protruding portion; 511. a conductive plane; 512. a first portion; 52. an insulation section;
200. a base station antenna; 210. a radiation unit; 211. a feed structure; 212. a feed structure accommodating chamber; 220. balun (B); 230. a feed signal board; 240. a feed signal line; 250. phase shifting dielectric plate.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The phase shifter and the base station antenna according to the embodiments of the present application are described below with reference to the drawings.
Fig. 1 is a schematic cross-sectional view of a phase shifter provided in an embodiment of the present application, fig. 2 is an enlarged partial schematic view of a connection between a feed rod and a cavity assembly in the phase shifter provided in an embodiment of the present application, and fig. 3 is an exploded structure schematic view of the phase shifter provided in an embodiment of the present application.
Referring to fig. 1, 2 and 3, a phase shifter 100 provided in an embodiment of the present application includes a cavity assembly 101, a fixed circuit board 30 and a feed rod 50.
The chamber assembly 101 has a phase shifting chamber 21 built therein. The fixed circuit board 30 is disposed in the phase shifting cavity 21, and the fixed circuit board 30 has a signal output terminal 31. The feed rod 50 penetrates through the cavity assembly 101 and is electrically insulated from the cavity assembly 101, the feed rod 50 comprises an insulation section 52 and a conductive section 51 connected with the insulation section 52, the insulation section 52 is fixedly connected with the cavity assembly 101, a part of the conductive section 51 is located in the phase shifting cavity 21 and is in contact with the signal output end 31, and the other part of the conductive section 51 extends out of the phase shifting cavity 21.
By the feed rod 50 comprising the conductive segment 51, a part of the conductive segment 51 is structured within the phase shifting cavity 21 and in contact with the signal output terminal 31 such that the conductive segment 51 is electrically connected to the signal output terminal 31. The other part of the structure of the conductive segment 51 extends out of the phase shifting cavity 21, so that the electric signal of the fixed circuit board 30 is led out of the phase shifting cavity 21 through the conductive segment 51 for connection use of the radiation unit 210.
And the feed rod 50 penetrates through the cavity assembly 101, and the insulating section 52 is fixedly connected with the cavity assembly 101, so that the conductive section 51 and the cavity assembly 101 can be relatively fixed. At the same time, the conductive segment 51 is at least partially structurally located within the phase shifting chamber 21 and in contact with the signal output 31 such that the conductive segment 51 is electrically connected to the signal output 31 by direct contact therewith. In other words, in the embodiment of the present application, only the feed rod 50 is inserted into the cavity assembly 101, so that at least a part of the conductive segment 51 is in structural contact with the signal output end 31 of the fixed circuit board 30, and another part of the conductive segment 51 extends out of the phase shifting cavity 21, so that the electrical signal of the fixed circuit board 30 can be led out of the phase shifting cavity 21. The process of welding the coaxial cable extending into the cavity from the outer side of the cavity to the signal output end 31 of the fixed circuit board 30 in the related art is omitted, the connection process is simple and reliable, the assembly efficiency and consistency are improved, and the coaxial cable is not required to be welded to the signal output end of the fixed circuit board, so that the fixed circuit board 30 can realize electroplating-free.
In addition, since the signal output end 31 of the fixed circuit board 30 directly leads out signals through the feed rod 50, compared with a coaxial cable, the transmission loss can be reduced, the antenna gain is increased, and the requirements of high efficiency, low carbon and green development of the base station are met.
In the embodiment of the present application, N branches (N is a natural number greater than or equal to 1) are disposed on the fixed circuit board 30, and the N branches are in one-to-one correspondence with the N radiation units 210. The number of signal output terminals 31 provided in 1 branch is determined by the kind of the radiation unit 210 corresponding to the branch, for example, in the case where the radiation unit 210 is a dual polarized radiation unit (for example, ±45° dual polarized radiation unit), the number of signal output terminals 31 provided corresponding to 1 branch is two, one signal output terminal 31 is electrically connected to one feeding structure 211 (refer to fig. 6 described later) of the dual polarized radiation unit 210 through the feeding rod 50, and the other signal output terminal 31 is electrically connected to the other feeding structure 211 (refer to fig. 6 described later) of the dual polarized radiation unit 210 through the other feeding rod 50. In the case where the radiation unit 210 is a monopole radiation unit, the number of signal outputs 31 provided corresponding to 1 branch is one, and the signal outputs 31 are electrically connected to the feed structure of the monopole radiation unit through one feed lever 50.
In the embodiment of the present application, the phase shifter 100 and the dual-polarized radiating element are used as examples, and similar to other types of radiating elements 210, the description thereof is omitted herein.
In the phase shifter 100 of the embodiment of the present application, the number of the feed rods 50 and the number of the signal output terminals 31 are the same, and are arranged in one-to-one correspondence, no matter what type of radiating element is applied.
It will be appreciated that, referring to fig. 1 and 2, in the case where the radiating element 210 is a dual polarized radiating element, the fixed circuit board 30 may include two signal output terminals 31 corresponding to two sub-circuit boards 301,1 branches respectively disposed on the two sub-circuit boards 301.
In this application, the cavity assembly 101 includes a reflecting plate 10 and a housing 20 connected to the reflecting plate 10, the insulating section 52 is fixedly connected to the housing 20, and the housing 20 and the reflecting plate 10 together define a phase shifting cavity 21. In this way, the casing 20 is formed into a half-cavity structure, so that materials can be effectively saved, the weight is reduced, and the miniaturization and the light weight design of the antenna are facilitated.
For example, referring to fig. 1 and 3, the housing 20 includes a bottom wall 207 and side walls 208 connected to both sides of the bottom wall 207, such that the bottom wall 207 and the side walls 208 define a cavity having an opening 202, and the reflecting plate 10 is disposed at the position of the opening 202, such that the reflecting plate 10 and the housing 20 together define the phase shifting cavity 21. The conductive segment 51 may penetrate through the opening and be inserted into the reflective plate 10.
Of course, in other embodiments, the phase shifting chamber 21 may be constructed directly within the housing 20. The case 20 is fixed to one side of the reflection plate 10. Further, the case 20 is a metal member, and may be formed by, for example, pultrusion, stamping, or the like.
In the embodiment of the present application, referring to fig. 1 and 2, in the case where the radiation unit 210 is a dual polarized radiation unit, a partition 22 is illustratively further provided in the housing 20 to divide the phase shifting cavity 21 into two chambers. In the case where the housing 20 includes the bottom wall 207 and the side walls 208 connected to both sides of the bottom wall 207, the partition 22 may form a semi-open double-cavity structure together with the housing 20, and the reflection plate 10 is covered on top of the side walls 208, that is, the phase-shifting cavity 21 with a closed cross section.
The fixed circuit board 30 may be a signal board for transmitting high-frequency electromagnetic signals, and in addition, the fixed circuit board 30 may be configured as a double-sided copper-clad PCB board or a metal strip line. The fixed circuit board 30 is fixed approximately at the height-direction center of the phase shifting chamber 21.
As described above, the fixed circuit board 30 includes two sub-circuit boards 301, and each sub-circuit board 301 is provided with one signal output terminal 31, and the two signal output terminals 31 of the two sub-circuit boards 301 are respectively electrically connected to the two feeding structures 211 of the radiating unit 210. The number of the feed rods 50 is two, and is set in one-to-one correspondence with the signal output terminals 31. A corresponding set of sub-circuit boards 301 and feed bars 50 are provided in each chamber.
The phase shifter 100 may further include a phase shifting dielectric plate 250, the phase shifting dielectric plate 250 being disposed at one side or both sides of the fixed circuit board 30. The phase shifting dielectric plate 250 may be slid with respect to the fixed circuit board 30 such that the phase shifting dielectric plate 250 covers the fixed circuit board 30 in whole or in part, thereby changing the signal line transmission phase.
In the present embodiment, the insulating section 52 is removably secured to the housing 20, such that it is configured for routine maintenance and replacement.
Further, the housing 20 is provided with a first mounting hole 201, and the insulating section 52 is in snap fit or threaded connection with the first mounting hole 201. In the case where the number of the radiation units 210 is plural, the positions of the first mounting holes 201 are in one-to-one correspondence with the positions of openings (fig. 6 described later) of the feeding structure accommodating chambers 212 on the radiation units 210.
For example, the reflecting plate 10 may be provided with a first avoiding hole 11, and the conductive segment 51 penetrates the first avoiding hole 11 and has a distance from the wall of the first avoiding hole 11. Insulation of the conductive segments 51 from the reflective plate 10 can be achieved in this way.
Fig. 4 is a schematic structural diagram of a feed rod in a phase shifter according to an embodiment of the present application, fig. 5 is a schematic structural diagram of a connection between the phase shifter and a radiation unit according to an embodiment of the present application, and fig. 6 is a cross-sectional view of the phase shifter according to an embodiment of the present application.
In the embodiment of the present application, referring to fig. 2 and 4, the conductive segment 51 and the insulating segment 52 may be in insert fit, for example, the conductive segment 51 may be overmolded to form the feed rod 50.
Further, the surface of the conductive segment 51 is further provided with a conductive plane 511, and the conductive plane 511 extends towards the signal output end 31 and abuts against the signal output end 31. This facilitates a more reliable contact between the conductive plane 511 and the signal output terminal 31 when the feed rod 50 is inserted into the cavity assembly 101.
Illustratively, the end of the conductive segment 51 facing the insulating segment 52 is provided with a protrusion 510, and the surface of the protrusion 510 facing the fixed circuit board 30 forms a conductive plane 511. The signal output 31 is provided on the surface of the fixed circuit board 30 facing the insulating section 52. The fixed circuit board 30 is provided with a second avoidance hole 32, and the conductive section 51 also penetrates through the second avoidance hole 32, so that the conductive plane 511 is abutted to the signal output end 31.
The protrusion 510 may be disposed around the entire circumference of the conductive segment 51 to be configured as a ring. The external diameter of the protruding portion 510 is larger than the diameter of the second avoiding hole 32, when the conductive section 51 penetrates through the second avoiding hole 32, the conductive plane 511 is tightly propped against the signal output end 31, and electrical connection between the conductive plane 511 and the signal output end 31 is achieved. The conductive segments 51 may protrude to the outside of the reflection plate 10. The portion of the conductive segment 51 protruding to the outside of the reflection plate 10 may be electrically connected with the feeding structure 211 of the radiating element 210 to achieve complete transmission of the high frequency signal from the phase shifter 100 to the radiating element 210.
In this embodiment, the phase shifter 100 further includes a positioning block 40, the positioning block 40 is configured as an insulating member, and the positioning block 40 is clamped between the reflective plate 10 and the fixed circuit board 30, and the conductive segment 51 sequentially penetrates through the fixed circuit board 30, the positioning block 40 and the reflective plate 10. In this way, the fixed circuit board 30 can be clamped between the positioning block 40 and the conductive plane 511 (the projection 510) of the conductive segment 51, thereby achieving relative fixation with the housing 20. In addition, the positioning block 40 is an insulating member, and can also electrically insulate the fixed circuit board 30 from the reflective plate 10.
Referring to fig. 1, 3 and 5, in the embodiment of the present application, a flange portion 203 is provided at the top of the housing 20, and the flange portion 203 abuts against the reflective plate 10 and is connected to the reflective plate 10 by a first fastener 204. The first fastener 204 may be an insulating member such as a plastic member. The first fastening member 204 may be disposed in a plurality along a first direction F shown in fig. 5, which may be, for example, an arrangement direction of the plurality of radiation units 210, and the first direction F is also a length direction of the housing 20.
Further, an insulating buffer 205 is interposed between the spacer 22 and the reflection plate 10, and an insulating buffer 205 is interposed between the burring 203 and the reflection plate 10.
To further enhance the coupling strength, the housing 20 is also coupled to the reflection plate 10 by the second fastener 206. The second fastener 206 is disposed at a position corresponding to the position of the partition 22. The number of the second fasteners 206 may be plural, and the plurality of second fasteners 206 may be spaced apart along the first direction F.
In this embodiment, referring to fig. 3-6, the second fastening member 206 is configured as a conductor, the second fastening member 206 is in contact with the reflective plate 10, and the second fastening member 206 is in contact with the housing 20, so that the reflective plate 10 and the housing 20 are electrically connected to each other, thereby realizing electrical common ground. The holes of the reflecting plate 10 through which the second fastening members 206 pass can be flexibly adjusted to an appropriate aperture according to the electrical impedance characteristics.
The reflecting plate 10 is also used for electrical or coupling connection with the balun 220 of the radiating element 210. This allows for an electrical or coupled connection between the housing 20 and the balun 220 without requiring a coaxial cable soldered connection as in the related art, thereby allowing for an electroplating-free process of the housing 20.
The second aspect of the embodiment of the present application also provides a base station antenna 200.
Fig. 7 is a schematic structural diagram of a base station antenna provided in an embodiment of the present application, and fig. 8 is a schematic structural diagram of another base station antenna provided in an embodiment of the present application.
Referring to fig. 6 and 7, a base station antenna 200 according to an embodiment of the present application includes a radiating element 210 and the phase shifter 100 described above. The radiating element 210 comprises a feed structure 211, the feed structure 211 being electrically connected to the conductive section 51 of the feed rod 50. The base station antenna 200 may be single frequency or multi-frequency. The number of the radiation units 210 is at least one, and in the case where the number of the radiation units 210 is plural, the plurality of radiation units 210 are sequentially arranged along the first direction F.
As a possible embodiment, the radiating element 210 includes a feeding structure accommodating cavity 212, the feeding structure 211 of the radiating element 210 is accommodated in the feeding structure accommodating cavity 212, the conductive segment 51 includes a first portion 512 extending out of the phase shifting cavity 21, and the first portion 512 is plugged into the feeding structure accommodating cavity 212 to be electrically connected with the corresponding feeding structure 211. In this way, the connection of the feed structure 211 to the feed rod 50 is made simpler and more reliable. It will be appreciated that the positions of the first avoiding holes 11 on the reflection plate 10 also need to be in one-to-one correspondence with the opening positions of the feeding structure accommodating cavity 212 of the radiation unit 210.
Referring to fig. 8, as another possible embodiment, the base station antenna 200 further includes a feeding signal board 230, and a feeding signal line 240 is further provided on the feeding signal board 230.
The feeding signal plate 230 is provided to the cavity assembly 101, for example, on a side of the reflecting plate 10 facing away from the housing 20. The first portion 512 of the conductive segment 51 is also the portion of the conductive segment 51 extending to the side of the reflective plate 10 facing away from the housing 20. The first portion 512 is electrically connected to the corresponding feed structure 211 by a feed signal line 240. By such arrangement, the electrical connection position between the feed rod 50 and the radiation unit 210 can be flexibly adjusted, and impedance matching can be conveniently adjusted.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (16)
1. A phase shifter, comprising:
the cavity assembly is internally provided with a phase shifting cavity;
the fixed circuit board is arranged in the phase shifting cavity and is provided with a signal output end;
the feed rod penetrates through the cavity assembly and is electrically insulated from the cavity assembly, the feed rod comprises an insulation section and a conductive section connected with the insulation section, the insulation section is fixedly connected with the cavity assembly, a part of structure of the conductive section is located in the phase shifting cavity and is in contact with the signal output end, and another part of structure of the conductive section extends out of the phase shifting cavity.
2. The phase shifter of claim 1, wherein the cavity assembly comprises a reflector plate and a housing coupled to the reflector plate, the insulating section being fixedly coupled to the housing;
the housing and the reflective plate together define the phase shifting cavity.
3. The phase shifter of claim 2, wherein the insulating section is detachably secured to the housing.
4. A phase shifter according to claim 3, wherein the housing is provided with a first mounting hole, and the insulating section is in snap fit or threaded connection with the first mounting hole.
5. The phase shifter of claim 2, wherein the reflective plate is provided with a first relief hole, the conductive segment extends through the first relief hole, and the conductive segment is spaced from a wall of the first relief hole.
6. The phase shifter of claim 2, wherein the conductive segment surface is further provided with a conductive plane extending toward and abutting the signal output.
7. The phase shifter according to claim 6, wherein an end of the conductive segment facing the insulating segment is provided with a protrusion, a surface of the protrusion facing the fixed circuit board forming the conductive plane; the signal output end is arranged on the surface of the fixed circuit board facing the insulation section;
the fixed circuit board is provided with a second avoidance hole, and the conductive section also penetrates through the second avoidance hole, so that the conductive plane is abutted to the signal output end.
8. The phase shifter of claim 7, further comprising a positioning block configured as an insulator, the positioning block being sandwiched between the reflective plate and the fixed circuit board;
the conductive section sequentially penetrates through the fixed circuit board, the positioning block and the reflecting plate.
9. The phase shifter according to any one of claims 2 to 8, wherein a partition plate is further provided in the housing to partition the phase shifting cavity into two chambers, the fixed circuit board includes two sub circuit boards, each of the sub circuit boards is provided with one signal output end, and the number of the feed rods is two and is set in one-to-one correspondence with the signal output ends;
the signal output end of one of the sub-circuit boards is used for being electrically connected with one feed structure of the radiating unit; the signal output end of the other sub-circuit board is used for being electrically connected with the other feed structure of the radiating unit;
and a group of corresponding sub-circuit boards and feed rods are arranged in each cavity.
10. The phase shifter of claim 9, wherein a flange portion is provided at a top of the housing, the flange portion abutting the reflection plate and being connected to the reflection plate by a first fastener.
11. The phase shifter of claim 10, wherein an insulating buffer is sandwiched between the baffle and the reflector plate, and an insulating buffer is also sandwiched between the flange portion and the reflector plate.
12. The phase shifter of any one of claims 2-8, wherein the housing is further coupled to the reflector plate by a second fastener.
13. The phase shifter of claim 12, wherein the second fastener is configured as a conductor, the second fastener being in contact with the reflector plate, the second fastener being in contact with the housing;
the reflecting plate is also used for being electrically connected or coupled with the balun of the radiating unit.
14. A base station antenna comprising a radiating element and a phase shifter according to any one of claims 1-13;
the radiating element includes a feed structure electrically connected with the conductive segment of the feed rod.
15. The base station antenna of claim 14, wherein the radiating elements comprise feed structure receiving cavities, and the conductive segments comprise first portions extending outside of the phase shifting cavities, the first portions being plugged into the feed structure receiving cavities to electrically connect with the feed structures of the corresponding radiating elements.
16. The base station antenna of claim 14, further comprising a feed signal board, wherein the feed signal board is further provided with a feed signal line;
the feed signal board is arranged outside the cavity assembly, the conductive section comprises a first part extending out of the phase shifting cavity, and the first part is electrically connected with the feed structure of the corresponding radiation unit through the feed signal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311460135.1A CN117276889A (en) | 2023-11-03 | 2023-11-03 | Phase shifter and base station antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311460135.1A CN117276889A (en) | 2023-11-03 | 2023-11-03 | Phase shifter and base station antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117276889A true CN117276889A (en) | 2023-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311460135.1A Pending CN117276889A (en) | 2023-11-03 | 2023-11-03 | Phase shifter and base station antenna |
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| Country | Link |
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| CN (1) | CN117276889A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117650402A (en) * | 2024-01-29 | 2024-03-05 | 西安欣创电子技术有限公司 | Radio frequency module combination applied to variable-pitch phased array antenna |
-
2023
- 2023-11-03 CN CN202311460135.1A patent/CN117276889A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117650402A (en) * | 2024-01-29 | 2024-03-05 | 西安欣创电子技术有限公司 | Radio frequency module combination applied to variable-pitch phased array antenna |
| CN117650402B (en) * | 2024-01-29 | 2024-04-26 | 西安欣创电子技术有限公司 | Radio frequency module combination applied to variable-pitch phased array antenna |
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