WO2012100602A1 - 滤波器 - Google Patents

滤波器 Download PDF

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Publication number
WO2012100602A1
WO2012100602A1 PCT/CN2011/083779 CN2011083779W WO2012100602A1 WO 2012100602 A1 WO2012100602 A1 WO 2012100602A1 CN 2011083779 W CN2011083779 W CN 2011083779W WO 2012100602 A1 WO2012100602 A1 WO 2012100602A1
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WO
WIPO (PCT)
Prior art keywords
connector
filter
filter according
external device
inner conductor
Prior art date
Application number
PCT/CN2011/083779
Other languages
English (en)
French (fr)
Inventor
薛鹏
沈楠
毛胤电
钟坤静
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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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 WO2012100602A1 publication Critical patent/WO2012100602A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/50—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency mounted on a PCB [Printed Circuit Board]

Definitions

  • the present invention relates to the field of communications, and in particular to a filter.
  • BACKGROUND OF THE INVENTION Filters are widely used in the field of communications as a frequency selective device for selecting communication signals in a system to filter out clutter or interference signals outside the frequency of the communication signals.
  • the coaxial cavity filter is widely used due to its high Q value, good electromagnetic shielding, low insertion loss, high power capacity, low processing accuracy, easy fabrication and easy debugging. application.
  • the insertion loss requirements of the filter are more and more strict, because the size of the filter insertion loss is related to the main performance of the base station, such as efficiency and heat dissipation.
  • the cavity filter usually adopts a connector to realize connection with other devices. This method is difficult to meet the RF due to the insertion loss caused by the connector and the insertion loss caused by the cable between the connectors. The need for low insertion loss in front-end devices.
  • the present invention provides a filter to at least solve the problem of a large insertion loss of a connector and a cable thereof in a filter in the related art.
  • a filter is provided.
  • the filter according to the present invention includes: a filter body; a cavity integral connector connected to the filter body, configured to be connected to an external device and to transmit a signal.
  • the cavity integral connector comprises: a connector body; a connector inner conductor, which is arranged inside the connector body to be connected with an external device and transmits a signal; and a shielding component connected to the connector body and arranged to shield the interference of the signal.
  • the shielding component is a shielding ring; the cavity integral connector further comprises: a groove, a built-in compressible flexible conductive material, and a cavity integral connector grounded.
  • the shielding member is a shielding groove, and the shielding groove has a built-in flexible conductive material.
  • the inner conductor of the connector is a threaded hole structure and is connected to an external device by a screw connection. The screws or bolts used for the threaded connection are silver plated.
  • the support medium between the inner conductor of the connector and the shielding member is an air medium and/or a polytetrafluoroethylene medium.
  • the inner conductor of the connector is inside the shielding member, and the inner conductor of the connector and the shielding member are concentric with each other.
  • the cavity integral connector also includes one or more threaded holes that are configured to be coupled to an external device by a threaded connection.
  • the filter body is integrally formed with the cavity integral connector.
  • the external device is a printed circuit board. The utility model directly connects with the printed circuit board through the cavity integral connector, reduces the insertion loss of the connector and the cable thereof, and can ensure the low insertion loss of the RF front end device.
  • FIG. 1 is a schematic diagram of a filter according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a filter according to a preferred embodiment of the present invention
  • FIG. 3 is a filter and a preferred embodiment according to the present invention. Schematic diagram of direct connection of printed circuit boards. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
  • An embodiment of the present invention provides a filter.
  • 1 is a schematic diagram of a filter, including: a filter body 12, a cavity integral connector 14, in accordance with an embodiment of the present invention. The structure is described in detail below.
  • the cavity integral connector 14 is connected to the filter body 12 and is provided to be connected to the external device 16 and to transmit signals.
  • the insertion loss of the connector and the cable thereof in the filter is large, and it is difficult to meet the requirement of low insertion loss of the RF front-end device.
  • the cavity integral connector is directly connected with the external device, thereby reducing the insertion loss of the connector and the cable thereof, and the requirement of low insertion loss of the RF front end device can be ensured.
  • 2 is a schematic diagram of a filter in accordance with a preferred embodiment of the present invention.
  • the cavity integral connector 14 includes a connector body 142, a connector inner conductor 144, and a shield member 146.
  • the connector inner conductor 144, inside the connector body 142 is disposed to be coupled to the external device 16 and to transmit a signal; the shield member 146 is coupled to the connector body 142 and is configured to shield the interference of the signal.
  • the shield member 146 is a shield ring; the cavity integral connector 14 further includes: a recess 148 having a compressible flexible conductive material disposed therein, the cavity integral connector 14 being disposed to be grounded. It should be noted that the preferred embodiment can ensure the shielding performance and reliable grounding of the connector.
  • the shielding member 146 is a shielding groove, and the shielding groove has a built-in flexible conductive material. It should be noted that the preferred embodiment can ensure the shielding performance and reliable grounding of the connector.
  • the inner conductor 144 of the connector is a threaded hole structure that is connected to the external device 16 by a screw connection.
  • the screws or bolts used in the threaded connection are silver plated.
  • the support medium between the inner conductor 144 of the connector and the shield member 146 is an air medium and/or a polytetrafluoroethylene medium.
  • the inner conductor 144 of the connector is inside the shield member 146, and the inner conductor 144 of the connector is concentric with the shield member 146.
  • the cavity integral connector 14 further includes one or more threaded holes 149 that are configured to be coupled to the external device 16 by a threaded connection. It should be noted that the preferred embodiment can ensure that the connector body 12 is twisted tightly with the printed wiring board.
  • the filter body 12 is integrally formed with the cavity integral connector 14.
  • the external device 16 is a printed wiring board.
  • the filter body 12 and the cavity integral connector 14 are integrally formed by die casting, machining, etc., and other modules such as a printed circuit board can be directly connected to the filter to reduce the printed circuit board and the filter through the cable.
  • a printed circuit board can be directly connected to the filter to reduce the printed circuit board and the filter through the cable.
  • the loss caused by the connector connection and the installation operation space The implementation process of the embodiment of the present invention will be described in detail below with reference to examples.
  • 3 is a schematic diagram of a filter directly connected to a printed circuit board according to a preferred embodiment of the present invention. As shown in FIG. 3, the filter body 31, the cavity integral connector 32, the printed wiring board 33, and the printed circuit board are included. Metal through hole 34, silver plated screw 35. The structure is described in detail below.
  • the cavity-integrated connector 32 is formed on the filter body 31, and is formed integrally with the filter body 31, and can be formed by machining in a form of die-casting.
  • the silver plated screw 35 serves two purposes. One is to securely connect the printed wiring board 33 to the integral connector 32. Second, the radio frequency signal on the printed circuit board 33 is conducted to the inner conductor of the cavity integral connector 32 through the silver plated screw 35 and the metal through hole 34 on the printed circuit board to enter the filter.
  • a filter is provided.
  • the utility model directly connects with the printed circuit board through the cavity integral connector, reduces the insertion loss of the connector and the cable thereof, and can ensure the low insertion loss of the RF front end device.
  • the connector has a simple structure, and has the advantages of simple installation and small installation operation space.

Abstract

本实用新型公开了一种滤波器，该滤波器包括：滤波器主体；腔体一体连接器，与滤波器主体相连接，设置为与外部设备相连接并传输信号。本实用新型减小了连接器及其线缆的插损，可以保证射频前端器件低插损的需求。另外，本连接器结构简单，还具备安装简便、安装操作空间小等优点。

Description

滤波器 技术领域 本实用新型涉及通信领域， 具体而言， 涉及一种滤波器。 背景技术 滤波器作为一种频率选择装置被广泛应用于通信领域， 在系统中用于选择通信信 号， 滤除通信信号频率外的杂波或干扰信号。 在现在的射频前端微波滤波器设计中， 同轴腔体滤波器由于其 Q值高、 电磁屏蔽好、插损低、功率容量大、加工精度要求低、 制作方便且易于调试等优点而得到广泛应用。 随着基站发射功率越来越大， 对滤波器的插损要求越来越严格， 因为滤波器插损 的大小关系到基站的效率、 散热等主要性能。 相关技术中， 腔体滤波器通常采用连接器来实现与其他器件的连接， 这种方式由 于连接器带来的插损和连接器之间线缆的带来的插损较大， 难以满足射频前端器件低 插损的需求。 实用新型内容 本实用新型提供了一种滤波器， 以至少解决相关技术中滤波器中的连接器及其线 缆的插损较大的问题。 为了实现上述目的， 根据本实用新型的一个方面， 提供了一种滤波器。 根据本实用新型的滤波器包括： 滤波器主体； 腔体一体连接器， 与滤波器主体相 连接， 设置为与外部设备相连接并传输信号。 腔体一体连接器包括： 连接器主体； 连接器内导体， 在连接器主体内部， 设置为 与外部设备相连接并传输信号； 屏蔽部件， 与连接器主体相连接， 设置为屏蔽信号的 干扰。 屏蔽部件为屏蔽环； 腔体一体连接器还包括： 凹槽， 内置有可压缩的柔性导电材 料， 设置为腔体一体连接器接地。 屏蔽部件为屏蔽槽， 屏蔽槽内置有柔性导电材料。 连接器内导体为螺纹孔结构， 通过螺纹连接方式与外部设备相连接。 螺纹连接方式使用的螺钉或螺栓经过镀银处理。 连接器内导体与屏蔽部件之间的支撑介质为空气介质和 /或聚四氟乙烯介质。 连接器内导体在屏蔽部件内部， 连接器内导体与屏蔽部件两圆同心。 腔体一体连接器还包括一个或多个螺纹孔， 设置为通过螺纹连接方式与外部设备 相连接。 滤波器主体与腔体一体连接器一体成型。 外部设备为印刷线路板。 本实用新型通过腔体一体连接器直接与印刷线路板相连接， 减小了连接器及其线 缆的插损， 可以保证射频前端器件低插损的需求。 另外， 本连接器结构简单， 还具备 安装简便、 安装操作空间小等优点。 附图说明 此处所说明的附图用来提供对本实用新型的进一步理解， 构成本申请的一部分， 本实用新型的示意性实施例及其说明用于解释本实用新型， 并不构成对本实用新型的 不当限定。 在附图中： 图 1是根据本实用新型实施例的滤波器的示意图； 图 2是根据本实用新型优选实施例的滤波器的示意图； 图 3是根据本实用新型优选实施例的滤波器与印刷线路板直接连接的示意图。 具体实施方式 需要说明的是， 在不冲突的情况下， 本申请中的实施例及实施例中的特征可以相 互组合。 下面将参考附图并结合实施例来详细说明本实用新型。 本实用新型实施例提供了一种滤波器。 图 1是根据本实用新型实施例的滤波器的 示意图， 包括： 滤波器主体 12， 腔体一体连接器 14。 下面对其结构进行详细描述。 腔体一体连接器 14， 与滤波器主体 12相连接， 设置为与外部设备 16相连接并传 输信号。 相关技术中， 滤波器中的连接器及其线缆的插损较大， 难以满足射频前端器件低 插损的需求。 本实用新型实施例中， 通过腔体一体连接器直接与外部设备相连接， 减 小了连接器及其线缆的插损， 可以保证射频前端器件低插损的需求。 图 2是根据本实用新型优选实施例的滤波器的示意图。 优选地， 腔体一体连接器 14包括连接器主体 142， 连接器内导体 144， 屏蔽部件 146。 下面对其结构进行详细描述。 连接器内导体 144， 在连接器主体 142内部， 设置为与外部设备 16相连接并传输 信号； 屏蔽部件 146， 与连接器主体 142相连接， 设置为屏蔽信号的干扰。 优选地， 屏蔽部件 146为屏蔽环； 腔体一体连接器 14还包括： 凹槽 148， 内置有 可压缩的柔性导电材料， 设置为腔体一体连接器 14接地。 需要说明的是， 本优选实施例可以保证连接器的屏蔽性能及可靠接地。 优选地， 屏蔽部件 146为屏蔽槽， 屏蔽槽内置有柔性导电材料。 需要说明的是， 本优选实施例可以保证连接器的屏蔽性能及可靠接地。 优选地，连接器内导体 144为螺纹孔结构，通过螺纹连接方式与外部设备 16相连 接。 优选地， 螺纹连接方式使用的螺钉或螺栓经过镀银处理。 优选地，连接器内导体 144与屏蔽部件 146之间的支撑介质为空气介质和 /或聚四 氟乙烯介质。 优选地， 连接器内导体 144在屏蔽部件 146内部， 连接器内导体 144与屏蔽部件 146两圆同心。 优选地， 腔体一体连接器 14还包括一个或多个螺纹孔 149， 设置为通过螺纹连接 方式与外部设备 16相连接。 需要说明的是， 本优选实施例可以保证连接器主体 12与印刷线路板绞合紧密。 优选地， 滤波器主体 12与腔体一体连接器 14一体成型。 优选地， 外部设备 16为印刷线路板。 优选地， 滤波器主体 12与腔体一体连接器 14通过压铸、 机械加工等形式一体成 型， 其它模块如印刷线路板可以直接和滤波器相扣接， 减小印刷线路板和滤波器通过 线缆连接器连接带来的损耗及安装操作空间。 下面将结合实例对本实用新型实施例的实现过程进行详细描述。 图 3是根据本实用新型优选实施例的滤波器与印刷线路板直接连接的示意图， 如 图 3所示， 包括滤波器主体 31， 腔体一体连接器 32， 印刷线路板 33， 印刷线路板上 金属通孔 34， 镀银螺钉 35。 下面对其结构进行详细描述。 腔体一体连接器 32制作在滤波器主体 31上， 与滤波器主体 31—体成型，可以通 过先压铸后机械加工的形式加工生成。 镀银螺钉 35有两个作用， 一是将印刷线路板 33与一体连接器 32进行紧固连接。 二是印刷线路板 33上的射频信号，通过镀银螺钉 35及印刷线路板上金属通孔 34传导 到腔体一体连接器 32的内导体上从而进入滤波器中。 综上所述， 根据本实用新型的上述实施例， 提供了一种滤波器。 本实用新型通过 腔体一体连接器直接与印刷线路板相连接， 减小了连接器及其线缆的插损， 可以保证 射频前端器件低插损的需求。 另外， 本连接器结构简单， 还具备安装简便、 安装操作 空间小等优点。 以上所述仅为本实用新型的优选实施例而已， 并不用于限制本实用新型， 对于本 领域的技术人员来说， 本实用新型可以有各种更改和变化。 凡在本实用新型的精神和 原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本实用新型的保护范围 之内。

Claims

权 利 要 求 书
1. 一种滤波器， 包括：
滤波器主体；
腔体一体连接器， 与所述滤波器主体相连接， 设置为与外部设备相连接并 传输信号。
2. 根据权利要求 1所述的滤波器， 其中， 所述腔体一体连接器包括：
连接器主体；
连接器内导体， 在所述连接器主体内部， 设置为与所述外部设备相连接并 传输所述信号；
屏蔽部件， 与所述连接器主体相连接， 设置为屏蔽信号的干扰。
3. 根据权利要求 2所述的滤波器， 其中， 所述屏蔽部件为屏蔽环； 所述腔体一体 连接器还包括：
凹槽， 内置有可压缩的柔性导电材料， 设置为所述腔体一体连接器接地。
4. 根据权利要求 2所述的滤波器， 其中， 所述屏蔽部件为屏蔽槽， 所述屏蔽槽内 置有柔性导电材料。
5. 根据权利要求 2所述的滤波器， 其中， 所述连接器内导体为螺纹孔结构， 通过 螺纹连接方式与所述外部设备相连接。
6. 根据权利要求 5所述的滤波器， 其中， 所述螺纹连接方式使用的螺钉或螺栓经 过镀银处理。
7. 根据权利要求 2所述的滤波器， 其中， 所述连接器内导体与所述屏蔽部件之间 的支撑介质为空气介质和 /或聚四氟乙烯介质。
8. 根据权利要求 2至 7中任一项所述的滤波器， 其中， 所述连接器内导体在所述 屏蔽部件内部， 所述连接器内导体与所述屏蔽部件两圆同心。
9. 根据权利要求 2至 7中任一项所述的滤波器， 其中， 所述腔体一体连接器还包 括一个或多个螺纹孔， 设置为通过螺纹连接方式与所述外部设备相连接。
10. 根据权利要求 1至 7中任一项所述的滤波器， 其中， 所述滤波器主体与所述腔 体一体连接器一体成型。
11. 根据权利要求 1至 7中任一项所述的滤波器， 其中， 所述外部设备为印刷线路 板。
PCT/CN2011/083779 2011-01-27 2011-12-09 滤波器 WO2012100602A1 (zh)

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CN103066350B (zh) * 2012-12-31 2018-06-05 深圳市大富科技股份有限公司 一种腔体滤波器及射频器件
CN109256609B (zh) * 2017-07-13 2020-04-03 昇达科技股份有限公司 具防泄漏腔室的非接触式频率自动调测滤波器

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CN101916895A (zh) * 2010-08-20 2010-12-15 深圳市大富科技股份有限公司 腔体滤波器及腔体滤波器制造方法
CN202050042U (zh) * 2011-01-27 2011-11-23 中兴通讯股份有限公司 滤波器

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