WO2022068586A1 - 介质滤波器 - Google Patents

介质滤波器 Download PDF

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Publication number
WO2022068586A1
WO2022068586A1 PCT/CN2021/118450 CN2021118450W WO2022068586A1 WO 2022068586 A1 WO2022068586 A1 WO 2022068586A1 CN 2021118450 W CN2021118450 W CN 2021118450W WO 2022068586 A1 WO2022068586 A1 WO 2022068586A1
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WO
WIPO (PCT)
Prior art keywords
conductive
dielectric
cavity
antenna board
board assembly
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PCT/CN2021/118450
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English (en)
French (fr)
Inventor
杨锋
龚红伟
夏斌
武增强
周虹
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2022068586A1 publication Critical patent/WO2022068586A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • 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

Definitions

  • Embodiments of the present disclosure relate to, but are not limited to, the field of communication devices, and in particular, relate to a dielectric filter.
  • dielectric filters have also evolved to ceramic dielectric filters as the main form.
  • the present disclosure provides a dielectric filter, the dielectric filter includes a dielectric cavity and an antenna board assembly, the outer surface of the dielectric cavity is a conductive surface, the antenna board assembly has a first surface and a a second surface opposite to the surface, wherein the dielectric filter further includes a housing, the housing includes a housing body having a first accommodating cavity and a plurality of connecting pieces formed on the housing body, the dielectric cavity The body is disposed in the first accommodating cavity of the housing body, the first surface of the antenna board assembly faces the medium cavity, and the antenna board assembly is formed with a plurality of connection holes, each of which corresponds to at least one connecting piece, the connecting hole penetrates the antenna board assembly along the thickness direction of the antenna board assembly, the connecting piece includes a connecting part and a buckle part, one end of the connecting part is connected with the shell body, The other end of the connecting portion is connected to the snap portion, and the connecting portion passes through the corresponding connecting hole and is in contact with the second surface of the antenna board assembly.
  • the dielectric filter further includes a plurality of conductive needles
  • the conductive needles include a conductive cap, an elastic member and a conductive column, a second accommodating cavity is formed in the conductive cap, and the elastic member is disposed on the In the second accommodating cavity, one end of the conductive column is connected to the elastic member, the other end of the conductive column is electrically connected to the antenna board assembly, and the conductive column is electrically connected to the conductive cap;
  • the conductive pins are provided in both the input port and the output port of the medium cavity, the conductive cap is electrically connected to the conductive surface, and the conductive column is electrically connected to the signal strip line of the antenna board assembly.
  • the dielectric filter further includes a plurality of shielding conductive parts, each of the conductive pins corresponds to the shielding conductive parts, the shielding conductive parts are arranged on the periphery of the corresponding conductive pins, and the shielding conductive parts It is also arranged between the first surface of the antenna board assembly and the dielectric cavity, so as to electrically connect the conductive surface of the dielectric cavity with the grounding area of the antenna board assembly, and the shielding conductive member is connected to the grounding area of the antenna board assembly.
  • the signal strip lines on the antenna board assembly are insulated at intervals.
  • the shielding conductive member has elasticity.
  • the shielding conductive member is made of conductive glue; or the shielding conductive member is made of an elastic metal sheet.
  • the casing includes a casing bottom plate and a casing side wall, the casing side wall is arranged around the casing bottom plate to enclose the first accommodating cavity, and the connecting portion is formed on the
  • the side wall of the casing is on a surface facing away from the bottom plate of the casing, and the bottom plate of the casing is opposite to the bottom surface of the medium cavity.
  • the casing further includes a positioning column
  • the positioning column is disposed on the surface of the side wall of the casing away from the bottom plate of the casing
  • the antenna board assembly further includes a positioning column corresponding to the positioning column. A positioning hole into which the positioning column is inserted.
  • the side wall of the casing includes a side wall body and a rib formed on the inner surface of the side wall body, and the rib is attached to the side surface of the medium cavity.
  • the side wall of the casing is further provided with at least one pair of notches and grooves, at least one of the connecting pieces corresponds to the pair of notches and grooves, and the pair of notches and grooves includes two notches and grooves, one of which is the notched groove.
  • the grooves are located on one side of the corresponding connecting piece, and the other said notched groove is located on the other side of the corresponding connecting piece.
  • the antenna board assembly includes a stacked antenna board and an antenna reflection board, and the antenna board is provided toward the dielectric cavity.
  • the dielectric cavity is connected with the antenna board assembly through the connecting piece provided on the casing, instead of connecting the dielectric cavity with the antenna board assembly by welding.
  • the dielectric filter assembly is used in an ambient temperature that varies between -40°C and 120°C, even if the expansion coefficients of the dielectric cavity and the antenna board assembly 300 are different, the dielectric cavity and the antenna board assembly 300 will not be in contact with each other. Expansion stress is formed between the two, and the dielectric cavity or the antenna board assembly will not be damaged, and the signal conduction between the dielectric cavity and the antenna board assembly will not be damaged.
  • FIG. 1 is a schematic structural diagram of a dielectric filter in the related art
  • FIG. 2 is a schematic cross-sectional view of a first embodiment of the dielectric filter provided by the present disclosure
  • FIG. 3 is a schematic cross-sectional view of a second embodiment of the dielectric filter provided by the present disclosure.
  • FIG. 4 is a schematic cross-sectional view of an embodiment of a conductive needle
  • FIG. 5 is a schematic structural diagram of an embodiment of a medium cavity
  • FIG. 6 is a schematic structural diagram of an embodiment of the housing.
  • FIG. 7 is an exploded schematic diagram of the second embodiment of the dielectric filter provided by the present disclosure.
  • FIG. 1 shows a dielectric filter in the related art.
  • the dielectric filter includes a dielectric cavity 110, a metal needle 120, a filter backing plate 130, and an antenna plate 140, wherein the dielectric cavity 110 is made of a ceramic material, and the outer surface of the dielectric cavity 110 is metallized.
  • the metal needles 120 realize electromagnetic signal conduction between the antenna board 140 and the dielectric cavity 110 .
  • the dielectric cavity 110 is integrally welded on the antenna liner 130 , and the antenna liner 130 and the antenna board 140 are soldered and surface-mounted, and the metal pins 120 are welded to the microstrip line on the antenna board 140 to achieve signal conduction.
  • the dielectric cavity is usually made of ceramic materials.
  • the temperature of the operating environment of the dielectric filter varies from -40°C to 120°C, while the expansion coefficient of the ceramic material is relatively small (4-10PPM).
  • the expansion coefficient of the plate is relatively large (greater than 12PPM). Therefore, there is a large expansion stress between the antenna board and the dielectric cavity, which will cause the dielectric filter made of ceramic to crack, or the solder between the antenna liner and the antenna board to crack, thereby causing the dielectric filter to fail.
  • the dielectric filter includes a dielectric cavity 110 and an antenna board assembly 300 .
  • the outer surface of the dielectric cavity 110 is a conductive surface
  • the antenna board assembly 300 has a first surface and a second surface opposite to the first surface.
  • the dielectric filter further includes a housing 200 .
  • the housing 200 includes a housing body 210 having a first accommodating cavity and a plurality of connecting pieces 220 formed on the housing body 210 . in the first accommodating cavity.
  • the first surface of the antenna board assembly 300 faces the dielectric cavity 110 , a plurality of connection holes 300 a are formed on the antenna board assembly 300 , each connection hole 300 a corresponds to at least one connecting piece 220 , and the connection holes 300 a are along the The thickness direction runs through the antenna board assembly 300 .
  • the connecting member 220 includes a connecting portion 221 and a snap portion 222. One end of the connecting portion 221 is connected to the housing body 210, and the other end of the connecting portion 221 is connected to the snap portion 222. The connecting portion 221 passes through the corresponding connecting hole 300a and is connected to the housing body 210. The second surfaces of the antenna board assembly 300 are in contact.
  • the dielectric cavity 110 and the antenna board assembly 300 are connected through the connecting member 220 provided on the casing, instead of connecting the dielectric cavity 110 and the antenna board assembly 300 by welding.
  • the dielectric filter assembly is used in an ambient temperature that varies between -40°C and 120°C, even if the expansion coefficients of the dielectric cavity 110 and the antenna board assembly 300 are different, the dielectric cavity 110 and the antenna board will not interact with each other. Expansion stress is formed between the components 300 , and the dielectric cavity 110 or the antenna board assembly will not be damaged, and the signal conduction between the dielectric cavity 110 and the antenna board assembly 300 will not be damaged.
  • the dielectric filter When assembling the dielectric filter, it is only necessary to set the dielectric cavity 110 in the first accommodating cavity of the casing 200 , and then align the connecting piece 220 with the corresponding connecting hole 300 a to realize the casing 200 and the antenna board assembly 300 The card can be connected in between. Compared with the related art in which the connection between the dielectric cavity 110 and the antenna board is realized by welding, the dielectric filter provided by the present disclosure is easier to assemble.
  • the material of the casing 200 should have elasticity, and similarly, in order to realize the function of the dielectric filter, the casing 200 should be insulated. Accordingly, the housing 200 may be made of plastic.
  • the specific structure of the medium cavity 110 is not particularly limited.
  • the dielectric cavity 110 includes a ceramic body and a conductive layer disposed on the outer surface of the ceramic body, that is, the outer surface of the dielectric cavity 110 is a conductive surface.
  • the conductive layer there is no particular limitation on how to form the conductive layer on the outer surface of the ceramic body.
  • the outer surface of the ceramic body can be metallized by means of plating to obtain the conductive layer.
  • the connecting portion 221 of the connecting piece 220 passes through the connecting hole 300a corresponding to the connecting piece, so as to realize the fixed connection between the housing 200 and the antenna board assembly 300 by the snap portion 222, and finally realize the medium cavity Connection of the body 110 to the antenna board assembly 300 .
  • signal conduction between the dielectric cavity 110 and the antenna board assembly 300 needs to be achieved. Specifically, both the input port and the output port of the dielectric cavity 110 need to be electrically connected to the signal stripline of the antenna board assembly.
  • FIG. 5 shows an embodiment of a medium cavity 110 .
  • an input port 111 and an output port 112 are formed on the medium cavity 110 .
  • the dielectric cavity 110 is also formed with structures such as coupling and debugging grooves, tuning frequency holes, and the like.
  • the outer surface of the conductive pillar 430 may be in contact with the surface of the second receiving cavity to form an electrical connection between the conductive pillar 430 and the conductive cap 410 .
  • the elastic member 420 can be made of a conductive material, and one end of the elastic member 420 is fixedly connected to the conductive cap 410 and the other end is fixed to the conductive post 430 connect. Also, the elastic member 420 should be in a compressed state to ensure close contact between the conductive post 430 and the signal stripline.
  • the outer surfaces of the conductive pins 400 may be plated with copper or silver to better realize signal transmission.
  • Both the input port and the output port of the dielectric cavity 110 are provided with conductive pins 400 , the conductive cap 410 is electrically connected to the conductive surface, and the conductive post 410 is electrically connected to the signal strip line on the antenna board assembly 300 to realize the dielectric cavity 110 Signal conduction between the input port and the output port of the antenna board assembly 300 and the signal strip line on the antenna board assembly 300 .
  • the specific structure of the elastic member 420 is not particularly limited.
  • the elastic member 420 may be a metal spring or a metal elastic sheet.
  • the input port of the dielectric cavity 110 and the signal conduction between the output port and the antenna board can be realized, and there is no need to set up a filter backing plate or welding, thereby further avoiding the antenna board. Component failed due to soldering.
  • the dielectric cavity of the finished dielectric filter and the antenna board assembly are formed as a whole by welding the filter backing plate.
  • the dielectric cavity reaches the required performance the dielectric cavity and the antenna board assembly that meet the performance are welded together through the filter backing plate.
  • the dielectric filter provided by the embodiment of the present disclosure since the conductive pins 400 have elasticity, the signal conduction between the antenna board assembly 300 and the dielectric cavity 110 can be achieved without welding when debugging the filter.
  • the debugging environment when debugging the filter is benchmarked with the actual use environment of the filter, which can eliminate the index difference between the debugging index and the real use environment, and the dielectric filter that meets the performance requirements in the debugging environment can also meet the performance requirements in the use environment. Therefore, compared with the dielectric filter in the related art, the dielectric filter provided by the embodiments of the present disclosure has better performance.
  • the dielectric filter further includes a plurality of shielding conductive members 500 , each conductive pin 400 corresponds to the shielding conductive member, and the shielding conductive member 500 is disposed on the periphery of the corresponding conductive needle 400 , the shielding conductive member 500 is disposed between the first surface of the antenna board assembly 300 and the dielectric cavity 110 to electrically connect the conductive surface of the dielectric cavity 110 with the grounding area of the antenna board assembly 300. It should be noted that the shielding conductive The member 500 is insulated from the signal strip lines on the antenna board assembly 300 .
  • the shielded conductive member 500 has elasticity and is in a compressed state.
  • the shielding conductive member 500 may be made of conductive glue.
  • the shielded conductive member 500 can be made of strip-shaped or sheet-shaped conductive adhesive.
  • the conductive adhesive mainly includes a resin matrix and conductive particles dispersed in the resin matrix.
  • the resin matrix mainly includes epoxy resin, acrylate resin, polychloride and so on.
  • the conductive adhesive requires that the conductive particles themselves have good conductivity and the particle size should be within a suitable range, and can be added to the resin matrix to form a conductive path.
  • the conductive particles can be made from any of gold, silver, copper, aluminum, zinc, iron, nickel powders and graphite and some conductive compounds.
  • the shielding conductive member 500 may also be made of a conductive elastic metal sheet.
  • the specific structure of the housing 200 is not particularly limited.
  • the casing 200 includes a casing bottom plate 211 and a casing side wall 212 , and the casing side wall 212 is arranged around the casing bottom plate 211 to enclose the first accommodating cavity,
  • the connecting portion 220 is formed on the surface of the side wall 212 of the casing facing away from the bottom plate 211 of the casing, and the bottom plate 211 of the casing is disposed opposite to the bottom surface of the medium cavity 110 .
  • the case 200 may be made of plastic, and thus, the case 200 may be formed through an injection molding process.
  • the housing further includes a positioning post 230, and the positioning post 230 is disposed on the surface of the side wall of the housing away from the bottom plate 211 of the housing.
  • the antenna board assembly 300 further includes a The positioning holes corresponding to the positioning posts 230 are inserted into the corresponding positioning holes 230 .
  • the positioning post 230 can also play the role of auxiliary connection, reduce the lateral external force on the connecting piece 220 under the vibration environment, and prevent the opening of the connecting piece 220 from coming out of the connecting hole.
  • the housing 200 includes two positioning columns 230 , of course, the present disclosure is not limited thereto, and more positioning columns 230 may also be provided.
  • the side wall 212 of the housing may include a side wall body 212a and a side wall body 212a formed in the side wall body 212a.
  • the rib 212b on the surface is in contact with the side surface of the medium cavity 110 .
  • the contact area between the housing 200 and the medium cavity 100 is small, thereby facilitating the removal of the medium cavity 110 from the first accommodating cavity take out. Also, providing the ribs 212b can also improve the strength of the housing 200 .
  • At least one weight reduction hole is formed on at least one of the casing side wall 212 and the casing bottom plate 211 .
  • weight reduction holes 211 a are formed on the bottom plate 211 of the casing, and weight reduction holes are also formed on the side walls of the casing.
  • the connecting member 220 When the housing 200 and the antenna board assembly 300 are assembled together, a force needs to be applied to the connecting member 220 so that the connecting member 220 is elastically deformed, so that the snap portion 222 can pass through the connecting hole 300 a, and at the snap portion 222 After passing through the connecting hole 300a, it can be restored to the original state and be stuck on the second surface of the antenna board assembly 300.
  • the thickness of the connecting portion of the connecting piece 220 is smaller than the thickness of the side wall body 212a.
  • the thickness of the connecting portion 221 is approximately half of the thickness of the sidewall body 212a.
  • At least one pair of notches and grooves is further provided on the side wall 212 of the casing, and at least one of the connecting pieces 220 corresponds to the pair of notches and grooves, and the pair of notches and grooves includes two pairs of notches and grooves. Notched grooves, one of the notched grooves is located on one side of the corresponding connector 220 , and the other notched groove is located on the other side of the corresponding connector.
  • the rigidity of the connecting piece 220 can be reduced, so that the connecting piece 220 can be elastically deformed.
  • four connectors 220 are provided on the housing 200 , wherein two connectors 220 are provided with pairs of notches and grooves correspondingly, and corresponding connectors with pairs of notches and grooves are provided 220 is arranged on the opposite side walls of the housing, so that the two can be deformed synchronously when the dielectric filter is assembled.
  • the pair of notches and grooves are not provided on the other two side walls of the casing.
  • the antenna board assembly 300 is also not particularly limited.
  • the antenna board assembly 300 may be a single-layer structure. As shown in FIG. 2 , the connecting hole 300a directly penetrates the single-layer antenna board assembly, and the snap portion 222 is snapped on the antenna board assembly.
  • the antenna board assembly 300 may include a stacked antenna board 310 and an antenna reflection board 320 , and the antenna board 310 is positioned toward the dielectric cavity.
  • the connection hole 300 a penetrates the antenna plate 310 and the antenna reflection plate 320 , and the opening portion 222 is clamped on the antenna reflection plate 320 .
  • a first connection hole 310 a is formed on the antenna plate 310
  • a second connection hole 320 a is formed on the antenna reflector 320
  • the first connection hole 310 a and the second connection hole 320 b communicate with each other to form a connection hole 300 a .
  • the positioning holes may also include a first positioning hole 310b penetrating the antenna plate 310 and a second positioning hole 320b penetrating the antenna radiating plate 320 .
  • the dielectric filter can be assembled in the manner shown in FIG. 7 : the dielectric cavity 110 is clamped into the housing 200 , and the dielectric cavity 110 is clamped on the housing 200 including the antenna plate 310 and the antenna reflector through the connection part on the housing 200 .
  • the conductive pin 400 is in close contact with the signal strip line on the antenna board 310 to realize signal conduction, and the shielded conductive member 500 around the conductive pin 400 is in close contact with the grounding area on the antenna board 310 to achieve Ground shield.

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Abstract

本公开提供一种介质滤波器，所述介质滤波器包括介质腔体和天线板组件，介质腔体的外表面为导电表面，天线板组件具有第一表面和与第一表面相对的第二表面，介质滤波器还包括壳体，壳体包括具有第一容纳腔的壳本体和形成在所述壳本体上的多个连接件，介质腔体设置在壳本体的第一容纳腔内，天线板组件的第一表面朝向介质腔体，天线板组件上形成有多个连接孔，每个连接孔对应至少一个连接件，连接孔沿天线板组件的厚度方向贯穿天线板组件，连接件包括连接部和卡扣部，连接部的一端与壳本体相连，连接部的另一端与卡扣部相连，连接部穿过相应的连接孔，并与天线板组件的第二表面相接触。所述介质腔体不会因为膨胀应力而失效。

Description

介质滤波器
相关申请的交叉引用
本公开要求在2020年9月29日提交国家知识产权局、申请号为202011050700.3、发明名称为“介质滤波器”的中国专利申请的优先权，该申请的全部内容通过引用结合在本公开中。
技术领域
本公开的实施例涉及但不限于通信设备领域，具体地，涉及一种介质滤波器。
背景技术
随着通信技术的发展，通信设备的竞争力主要体现在小体积、轻重量、低成本等方面。介质滤波器作为天馈系统的重要组成部分，也已经演进到了以陶瓷介质滤波器为主要形式。
但是，在使用陶瓷介质滤波器的过程中，会出现介质滤波器损坏、导致产品性能失效的问题。
发明内容
本公开提供一种介质滤波器，所述介质滤波器包括介质腔体和天线板组件，所述介质腔体的外表面为导电表面，所述天线板组件具有第一表面和与所述第一表面相对的第二表面，其中，所述介质滤波器还包括壳体，所述壳体包括具有第一容纳腔的壳本体和形成在所述壳本体上的多个连接件，所述介质腔体设置在所述壳本体的第一容纳腔内，所述天线板组件的第一表面朝向所述介质腔体，所述天线板组件上形成有多个连接孔，每个所述连接孔对应至少一个连接件，所述连接孔沿所述天线板组件的厚度 方向贯穿所述天线板组件，所述连接件包括连接部和卡扣部，所述连接部的一端与所述壳本体相连，所述连接部的另一端与所述卡扣部相连，所述连接部穿过相应的连接孔，并与所述天线板组件的第二表面相接触。
可选地，所述介质滤波器还包括多个导电针，所述导电针包括导电帽、弹性件和导电柱，所述导电帽内形成有第二容纳腔，所述弹性件设置在所述第二容纳腔内，所述导电柱的一端与所述弹性件相连，所述导电柱的另一端与所述天线板组件电连接，且所述导电柱与所述导电帽电连接；所述介质腔体的输入端口和输出端口中均设置有所述导电针，且所述导电帽与所述导电表面电连接，所述导电柱与所述天线板组件的信号带线电连接。
可选地，所述介质滤波器还包括多个屏蔽导电件，每个所述导电针均对应有所述屏蔽导电件，所述屏蔽导电件设置在相应的导电针外围，所述屏蔽导电件还设置在所述天线板组件的第一表面与所述介质腔体之间，以将所述介质腔体的导电表面与所述天线板组件的接地区电连接，且所述屏蔽导电件与所述天线板组件上的信号带线绝缘间隔。
可选地，所述屏蔽导电件具有弹性。
可选地，所述屏蔽导电件由导电胶制成；或者所述屏蔽导电件由弹性金属片制成。
可选地，所述壳体包括壳体底板和壳体侧壁，所述壳体侧壁环绕所述壳体底板设置，以围成所述第一容纳腔，所述连接部形成在所述壳体侧壁背离所述壳体底板的表面上，所述壳体底板与所述介质腔体的底面相对。
可选地，所述壳体还包括定位柱，所述定位柱设置在所述壳体侧壁背离所述壳体底板的表面上，所述天线板组件上还包括与所述定位柱对应的定位孔，所述定位柱插入所述定位孔中。
可选地，所述壳体侧壁包括侧壁本体和形成在所述侧壁本体内表面的肋条，所述肋条与所述介质腔体的侧表面贴合。
可选地，所述壳体侧壁上还设置有至少一个缺口槽对，至少一个所述连接件对应有所述缺口槽对，所述缺口槽对包括两个缺口槽，其中一个所述缺口槽位于相应的连接件一侧，另一个所述缺口槽位于相应的连接件的 另一侧。
可选地，所述天线板组件包括层叠设置的天线板和天线反射板，所述天线板朝向所述介质腔体设置。
在本公开所提供的介质滤波器中，通过壳体上设置的连接件将介质腔体与天线板组件相连，并非通过焊接的方式将介质腔体与天线板组件相连。当所述介质滤波器组件在-40℃到120℃之间变化的环境温度中使用时，即便介质腔体与天线板组件300的膨胀系数不同，也不会在介质腔体和天线板组件之间形成膨胀应力，并且也不会造成介质腔体或者天线板组件损坏，并不会破坏介质腔体与天线板组件之间的信号导通。
附图说明
图1是相关技术中的介质滤波器的结构示意图；
图2是本公开所提供的介质滤波器的第一种实施方式的剖面示意图；
图3是本公开所提供的介质滤波器的第二种实施方式的剖面示意图；
图4是导电针的一种实施方式的剖面示意图；
图5是介质腔体的一种实施方式的结构示意图；
图6是壳体的一种实施方式的结构示意图；以及
图7是本公开所提供的介质滤波器的第二种实施方式的分解示意图。
具体实施方式
为使本领域的技术人员更好地理解本公开的技术方案，下面结合附图对本公开提供的介质滤波器进行详细描述。
在下文中将参考附图更充分地描述示例实施例，但是所述示例实施例可以以不同形式来体现且不应当被解释为限于本文阐述的实施例。反之，提供这些实施例的目的在于使本公开透彻和完整，并将使本领域技术人员充分理解本公开的范围。
在不冲突的情况下，本公开各实施例及实施例中的各特征可相互组合。
如本文所使用的，术语“和/或”包括一个或多个相关列举条目的任何和所有组合。
本文所使用的术语仅用于描述特定实施例，且不意欲限制本公开。如本文所使用的，单数形式“一个”和“该”也意欲包括复数形式，除非上下文另外清楚指出。还将理解的是，当本说明书中使用术语“包括”和/或“由……制成”时，指定存在所述特征、整体、步骤、操作、元件和/或组件，但不排除存在或添加一个或多个其它特征、整体、步骤、操作、元件、组件和/或其群组。
除非另外限定，否则本文所用的所有术语(包括技术和科学术语)的含义与本领域普通技术人员通常理解的含义相同。还将理解，诸如那些在常用字典中限定的那些术语应当被解释为具有与其在相关技术以及本公开的背景下的含义一致的含义，且将不解释为具有理想化或过度形式上的含义，除非本文明确如此限定。
图1示出了相关技术中的一种介质滤波器。该介质滤波器包括介质腔体110、金属针120、滤波器衬板130、天线板140，其中，介质腔体110由陶瓷材料制成，且介质腔体110的外表面经过了金属化处理，金属针120实现天线板140与介质腔体110之间的电磁信号导通。介质腔体110整体焊接在天线衬板130上，天线衬板130和天线板140之间焊锡表贴，同时金属针120与天线板140上的微带线焊接实现信号导通。
对于介质滤波器而言，介质腔体通常为陶瓷材料，介质滤波器的使用环境的温度在-40℃到120℃之间变化，而陶瓷材料的膨胀系数相对较小(4～10PPM)，天线板的膨胀系数相对较大(大于12PPM)。因此，天线板和介质腔体之间存在较大的膨胀应力，会导致陶瓷制成的介质滤波器开裂、或者天线衬板和天线板之间焊锡开裂，从而导致了介质滤波器失效。
有鉴于此，本公开的实施例提供一种介质滤波器。如图2和图3所示，所述介质滤波器包括介质腔体110和天线板组件300。介质腔体110的外 表面为导电表面，天线板组件300具有第一表面和与所述第一表面相对的第二表面。所述介质滤波器还包括壳体200，该壳体200包括具有第一容纳腔的壳本体210和形成在该壳本体210上的多个连接件220，介质腔体110设置在壳本体210的第一容纳腔内。天线板组件300的第一表面朝向介质腔体110，天线板组件300上形成有多个连接孔300a，每个连接孔300a对应至少一个连接件220，连接孔300a沿所述天线板组件300的厚度方向贯穿该天线板组件300。连接件220包括连接部221和卡扣部222，连接部221的一端与壳本体210相连，连接部221的另一端与卡扣部222相连，连接部221穿过相应的连接孔300a，并与天线板组件300的第二表面相接触。
需要指出的是，介质腔体110与天线板组件300之间存在信号导通。在本公开所提供的介质滤波器中，通过壳体上设置的连接件220将介质腔体110与天线板组件300相连，并非通过焊接的方式将介质腔体110与天线板组件300相连。当所述介质滤波器组件在-40℃到120℃之间变化的环境温度中使用时，即便介质腔体110与天线板组件300的膨胀系数不同，也不会在介质腔体110和天线板组件300之间形成膨胀应力，并且也不会造成介质腔体110或者天线板组件损坏，并不会破坏介质腔体110与天线板组件300之间的信号导通。
在组装所述介质滤波器时，只需要将介质腔体110设置在壳体200的第一容纳腔内，然后将连接件220对准相应的连接孔300a、实现壳体200与天线板组件300之间的卡接即可。与相关技术中，利用焊接实现介质腔体110与天线板之间的连接相比，本公开所提供的介质滤波器更加容易组装。
由于在使用过程中介质腔体110、以及天线板组件300之间不存在焊点，因此，在所述介质滤波器进行维修时，只需要通过连接件220从连接孔300a中撤出即可将壳体拆除，实现介质滤波器的解体，无需在高温下融化焊点，从而可以提高维修效率、降低维修成本。
为了便于安装，壳体200的材料应当具有弹性，同样地，为了实现介质滤波器的功能，壳体200应当是绝缘的。相应地，可以利用塑料制成壳 体200。
在本公开中，对介质腔体110的具体结构不做特殊的限定。作为一种可选实施方式，介质腔体110包括陶瓷本体和设置在陶瓷本体外表面的导电层，也就是说，介质腔体110的外表面为导电表面。在本公开中，对如何在陶瓷本体的外表面形成导电层也不做特殊的限定，例如，可以通过镀层的方式对陶瓷本体的外表面进行金属化处理，以获得所述导电层。
“每个连接孔300a对应至少一个连接件220”包括以下两种情况：第一种情况，一个连接孔300对应一个连接件220；第二种情况，一个连接孔300对应多个连接件220。无论是那种情况，连接件220的连接部221都穿过与该连接件对应的连接孔300a，以实现利用卡扣部222将壳体200与天线板组件300固定连接，并最终实现介质腔体110与天线板组件300的连接。
在本公开中，需要实现介质腔体110与天线板组件300之间的信号导通。具体地，介质腔体110的输入端口、以及输出端口均需要与天线板组件的信号带线电连接。
需要指出的是，介质腔体110的输入端口、以及输出端口均为形成在介质腔体110上的盲孔，并且，输入端口的表面、以及输出端口的表面均为导电表面。
图5中示出的是一种介质腔体110的实施方式，如图中所示，该介质腔体110上形成有输入端口111和输出端口112。此外，该介质腔体110上还形成有耦合调试槽、调谐频率孔等结构。
为了实现介质腔体110的输入端口、以及输出端口与天线板的信号导通，可选地，所述介质滤波器还包括多个导电针400。如图4中所示，导电针400包括导电帽410、弹性件420和导电柱430，导电帽410内形成有第二容纳腔，弹性件420设置在所述第二容纳腔内，导电柱430的一端与弹性件420相连，导电柱430的另一端与所述天线板组件电连接，且导电柱430与导电帽410电连接。
在本公开中，对导电柱430与导电帽410之间如何形成电连接不做特 殊的限定。例如，导电柱430的外表面可以与第二容纳腔的表面相接触，以形成导电柱430与导电帽410之间的电连接。为了确保导电柱430与导电帽410之间可以形成电连接，可选地，可以利用导电材料制成弹性件420，并且弹性件420的一端与导电帽410固定连接、另一端与导电柱430固定连接。并且，弹性件420应当处于压缩状态，以确保导电柱430与信号带线之间紧密接触。在本公开中，导电针400的外表面可以镀铜或者镀银，以更好地实现信号传输。
介质腔体110的输入端口和输出端口中均设置有导电针400，且导电帽410与导电表面电连接，导电柱410与天线板组件300上的信号带线电连接，以实现介质腔体110的输入端口、以及输出端口与天线板组件300上的信号带线之间的信号导通。
在本公开中，对弹性件420的具体结构不做特殊的限定，例如，弹性件420可以为金属弹簧，也可以为金属弹性片。
通过设置具有弹性件420的导电针400即可实现介质腔体110的输入端口、以及输出端口与天线板的信号导通，无需设置滤波器衬板，也无需进行焊接，从而进一步避免了天线板组件因焊接而失效。
在相关技术中，介质滤波器成品的介质腔体与天线板组件之间通过滤波器衬板焊接形成为一体。在组装介质滤波器时，需要先在介质腔体与天线板组件之间未焊接的状态下对介质腔体的介质滤波性能进行调试，改变介质腔体的结构。当介质腔体达到所需要的性能时，再将满足性能的介质腔体和天线板组件通过滤波器衬板焊接在一起。这就导致了对介质滤波器进行调试时的调试环境(介质腔体与天线板组件未焊接)与介质滤波器的使用环境(介质腔体与天线板组件通过滤波器衬板焊接)并不一致。也就是说，满足调试环境的性能要求的介质滤波器并不一定能满足介质滤波器的真实使用环境。
在本公开的实施例所提供的介质滤波器中，由于导电针400具有弹性，这样在调试滤波器时，不需要焊接即可实现天线板组件300与介质腔体110之间的信号导通，调试滤波器时的调试环境与实际使用滤波器的使用环境对标，可以消除调试指标与真实的使用环境之间的指标差异，满足调试环 境中性能要求的介质滤波器也能满足使用环境中的性能要求，因此，与相关技术中的介质滤波器相比，本公开实施例所提供的介质滤波器具有更好的性能。
为了实现信号的屏蔽，可选地，所述介质滤波器还包括多个屏蔽导电件500，每个导电针400都对应有所述屏蔽导电件，屏蔽导电件500设置在相应的导电针400外围，屏蔽导电件500设置在天线板组件300的第一表面与介质腔体110之间，以将介质腔体110的导电表面与天线板组件300的接地区电连接，需要指出的是，屏蔽导电件500与天线板组件300上的信号带线绝缘间隔。
为了实现屏蔽导电件500与介质腔体110的导电表面、以及天线板组件300的接地区紧密接触，可选地，屏蔽导电件500具有弹性，且处于压缩状态中。
为了便于设置，作为一种可选实施方式，可以利用导电胶制成屏蔽导电件500。例如，可以利用条状或者片状的导电胶制成屏蔽导电件500。导电胶主要包括树脂基体和分散在树脂基体中的导电粒子。树脂基体主要包括环氧树脂、丙烯酸酯树脂、聚氯酯等。导电胶要求导电粒子本身要有良好的导电性能粒径要在合适的范围内，能够添加到树脂基体中形成导电通路。导电粒子可以由金、银、铜、铝、锌、铁、镍的粉末和石墨及一些导电化合物中的任意一种制成。
当然，本公开并不限于此，也可以利用导电的弹性金属片制成屏蔽导电件500。
在本公开中，对壳体200的具体结构不做特殊的限定。如图2、图3、图6中所示，壳体200包括壳体底板211和壳体侧壁212，壳体侧壁212环绕壳体底板211设置，以围成所述第一容纳腔，连接部220形成在壳体侧壁212背离壳体底板211的表面上，壳体底板211与介质腔体110的底面相对设置。
如上文中所述，可以利用塑料制成壳体200，因此，可以通过注塑工艺形成壳体200。
为了便于安装，可选地，所述壳体还包括定位柱230，该定位柱230设置在所述壳体侧壁背离壳体底板211的表面上，相应地，天线板组件300上还包括与定位柱230对应的定位孔，定位柱230插入相应的定位孔230中。在组装壳体200、介质腔体110和天线板组件300时，将定位柱230与相应的定位孔对准，然后插入即可实现壳体与天线板组件300连接。此外，设置定位柱230还可以起到辅助连接的作用，减小振动环境下连接件220受到的横向外力，避免连接件220的开口部从连接孔中脱出。
在图6中所示的实施方式中，壳体200包括两定位柱230，当然，本公开并不限于此，还可以设置更多个定位柱230。
为了提高壳体200的强度、并便于将介质腔体110放入壳体200的第一容纳腔中，可选地，壳体侧壁212可以包括侧壁本体212a和形成在侧壁本体212a内表面的肋条212b，肋条212b与介质腔体110的侧表面贴合。
在壳体200中，仅肋条212b与介质腔体110的侧表面贴合，因此，壳体200与介质腔体100之间的接触面积较小，从而便于将介质腔体110从第一容纳腔中拿出。并且，设置肋条212b还可以提高壳体200的强度。
为了便于制造壳体200，可选地，壳体侧壁212和壳体底板211中的至少一者上形成有至少一个减重孔。
例如，在图6中所示的实施方式中，壳体底板211上形成有减重孔211a，并且壳体侧壁上也形成有减重孔。
在将壳体200与天线板组件300组装在一起时，需要对连接件220施加力，使得连接件220发生弹性变形，以便于卡扣部222能够穿过连接孔300a，并且在卡扣部222穿过连接孔300a后，能够恢复至原始状态并卡在天线板组件300的第二表面上。为了便于连接件220发生弹性变形以便于组装，可选地，连接件220的连接部的厚度小于侧壁本体212a的厚度。
如图6中所示，连接部221的厚度大概为侧壁本体212a厚度的二分之一。
为了进一步增加连接部221发生弹性变形，可选地，壳体侧壁212上还设置有至少一个缺口槽对，至少一个连接件220对应有所述缺口槽对， 所述缺口槽对包括两个缺口槽，其中一个所述缺口槽位于相应的连接件220一侧，另一个所述缺口槽位于相应的连接件的另一侧。
设置了缺口槽之后，可以降低连接件220的刚度，以便于连接件220发生弹性变形。
在图6中所示的具体实施方式中，壳体200上设置了四个连接件220，其中，两个连接件220上对应设置有缺口槽对，并且，对应设置有缺口槽对的连接件220设置在相对的壳体侧壁上，以便于在组装介质滤波器时二者同步变形。为了提高壳体200的强度，可选地，另外两个壳体侧壁上并未设置缺口槽对。
在本公开中，对天线板组件300也没有特殊的限定。作为一种可选实施方式，天线板组件300可以为单层结构，如图2中所示，连接孔300a直接贯穿单层的天线板组件，卡扣部222卡接在天线板组件上。
作为本公开的另一种可选实施方式，如图3所示，天线板组件300可以包括层叠设置的天线板310和天线反射板320，天线板310朝向所述介质腔体设置。连接孔300a贯穿天线板310和天线反射板320，开口部222卡接在天线反射板320上。
具体地，如图7所示，天线板310上形成有第一连接孔310a，天线反射板320上形成有第二连接孔320a，第一连接孔310a和第二连接孔320b连通形成连接孔300a。
相应地，如图7所示，定位孔也可以包括贯穿天线板310的第一定位孔310b和贯穿天线发射板320的第二定位孔320b。
可以按照图7中所示的方式组装所述介质滤波器：将介质腔体110卡入壳体200中，通过壳体200上的连接部将介质腔体110卡在包括天线板310和天线反射板320的天线组件的连接孔中，导电针400与天线板310上的信号带线紧密接触实现信号导通，导电针400周围的屏蔽导电件500与天线板310上的接地区紧密接触，实现接地屏蔽。
本文已经公开了示例实施例，并且虽然采用了具体术语，但它们仅用于并仅应当被解释为一般说明性含义，并且不用于限制的目的。在一些实 例中，对本领域技术人员显而易见的是，除非另外明确指出，否则可单独使用与特定实施例相结合描述的特征、特性和/或元素，或可与其它实施例相结合描述的特征、特性和/或元件组合使用。因此，本领域技术人员将理解，在不脱离由所附的权利要求阐明的本公开的范围的情况下，可进行各种形式和细节上的改变。

Claims (10)

  1. 一种介质滤波器，所述介质滤波器包括介质腔体和天线板组件，所述介质腔体的外表面为导电表面，所述天线板组件具有第一表面和与所述第一表面相对的第二表面，其中，
    所述介质滤波器还包括壳体，所述壳体包括具有第一容纳腔的壳本体和形成在所述壳本体上的多个连接件，
    所述介质腔体设置在所述壳本体的第一容纳腔内，
    所述天线板组件的第一表面朝向所述介质腔体，
    所述天线板组件上形成有多个连接孔，每个所述连接孔对应至少一个连接件，所述连接孔沿所述天线板组件的厚度方向贯穿所述天线板组件，
    所述连接件包括连接部和卡扣部，所述连接部的一端与所述壳本体相连，所述连接部的另一端与所述卡扣部相连，所述连接部穿过相应的连接孔，并与所述天线板组件的第二表面相接触。
  2. 根据权利要求1所述的介质滤波器，其中，
    所述介质滤波器还包括多个导电针，所述导电针包括导电帽、弹性件和导电柱，所述导电帽内形成有第二容纳腔，所述弹性件设置在所述第二容纳腔内，所述导电柱的一端与所述弹性件相连，所述导电柱的另一端与所述天线板组件电连接，且所述导电柱与所述导电帽电连接；
    所述介质腔体的输入端口和输出端口中均设置有所述导电针，且所述导电帽与所述导电表面电连接，所述导电柱与所述天线板组件的信号带线电连接。
  3. 根据权利要求1所述的介质滤波器，其中，
    所述介质滤波器还包括多个屏蔽导电件，每个所述导电针均对应有所述屏蔽导电件，所述屏蔽导电件设置在相应的导电针外围，所述屏蔽导电 件还设置在所述天线板组件的第一表面与所述介质腔体之间，以将所述介质腔体的导电表面与所述天线板组件的接地区电连接，且所述屏蔽导电件与所述天线板组件上的信号带线绝缘间隔。
  4. 根据权利要求3所述的介质滤波器，其中，所述屏蔽导电件具有弹性。
  5. 根据权利要求4所述的介质滤波器，其中，所述屏蔽导电件由导电胶制成；或者所述屏蔽导电件由弹性金属片制成。
  6. 根据权利要求1至5中任意一项所述的介质滤波器，其中，所述壳体包括壳体底板和壳体侧壁，所述壳体侧壁环绕所述壳体底板设置，以围成所述第一容纳腔，所述连接部形成在所述壳体侧壁背离所述壳体底板的表面上，所述壳体底板与所述介质腔体的底面相对。
  7. 根据权利要求6所述的介质滤波器，其中，
    所述壳体还包括定位柱，所述定位柱设置在所述壳体侧壁背离所述壳体底板的表面上，
    所述天线板组件上还包括与所述定位柱对应的定位孔，所述定位柱插入所述定位孔中。
  8. 根据权利要求6所述的介质滤波器，其中，所述壳体侧壁包括侧壁本体和形成在所述侧壁本体内表面的肋条，所述肋条与所述介质腔体的侧表面贴合。
  9. 根据权利要求6所述的介质滤波器，其中，
    所述壳体侧壁上还设置有至少一个缺口槽对，至少一个所述连接件对应有所述缺口槽对，
    所述缺口槽对包括两个缺口槽，其中一个所述缺口槽位于相应的连接件一侧，另一个所述缺口槽位于相应的连接件的另一侧。
  10. 根据权利要求1至5中任意一项所述的介质滤波器，其中，所述天线板组件包括层叠设置的天线板和天线反射板，所述天线板朝向所述介质腔体设置。
PCT/CN2021/118450 2020-09-29 2021-09-15 介质滤波器 WO2022068586A1 (zh)

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CN103531869A (zh) * 2012-07-03 2014-01-22 罗森伯格（上海）通信技术有限公司 一种tm模介质滤波器
US20160261016A1 (en) * 2013-11-12 2016-09-08 Huawei Technologies Co., Ltd. Dielectric Resonator and Dielectric Filter
CN108054475A (zh) * 2017-12-11 2018-05-18 四川九鼎智远知识产权运营有限公司 一种tm模介质滤波器
CN110518312A (zh) * 2019-08-26 2019-11-29 广东通宇通讯股份有限公司 陶瓷介质滤波器及其与天线耦合板的导通固定方法
CN111403867A (zh) * 2020-04-17 2020-07-10 京信射频技术(广州)有限公司 通信装置、介质滤波器及其设计方法

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CN103531869A (zh) * 2012-07-03 2014-01-22 罗森伯格（上海）通信技术有限公司 一种tm模介质滤波器
US20160261016A1 (en) * 2013-11-12 2016-09-08 Huawei Technologies Co., Ltd. Dielectric Resonator and Dielectric Filter
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