WO2019080568A1 - 同轴连接器及滤波器、射频器件 - Google Patents

同轴连接器及滤波器、射频器件

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Publication number
WO2019080568A1
WO2019080568A1 PCT/CN2018/097589 CN2018097589W WO2019080568A1 WO 2019080568 A1 WO2019080568 A1 WO 2019080568A1 CN 2018097589 W CN2018097589 W CN 2018097589W WO 2019080568 A1 WO2019080568 A1 WO 2019080568A1
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WO
WIPO (PCT)
Prior art keywords
coaxial connector
fastening ring
filter
cavity
flange
Prior art date
Application number
PCT/CN2018/097589
Other languages
English (en)
French (fr)
Inventor
陀思勇
周国明
孟弼慧
党志南
邸英杰
Original Assignee
京信通信系统（中国）有限公司
京信通信技术(广州)有限公司
京信通信系统（广州）有限公司
天津京信通信系统有限公司
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
Publication date
Application filed by 京信通信系统（中国）有限公司, 京信通信技术(广州)有限公司, 京信通信系统（广州）有限公司, 天津京信通信系统有限公司 filed Critical 京信通信系统（中国）有限公司
Publication of WO2019080568A1 publication Critical patent/WO2019080568A1/zh

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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
    • 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
    • H01R24/52—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 in or to a panel or structure
    • H01R24/525—Outlets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/04—Fixed joints
    • H01P1/045—Coaxial joints
    • 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
    • H01P1/207—Hollow waveguide filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
    • H01R13/74—Means for mounting coupling parts in openings of a panel

Definitions

  • the present invention relates to the field of radio frequency communication devices, and in particular, to a coaxial connector and a filter and a radio frequency device using the coaxial connector.
  • metal cavity filters have long been the base station and indoor signal distribution system of mobile communication systems due to their advantages of good electromagnetic shielding, high passband selectivity, high power capacity and easy batch processing. Preferred variety.
  • base station transmission power is getting higher and higher
  • metal cavity filter will generate passive intermodulation (PIM) under high power conditions, passive intermodulation power If it is too high, it will interfere with the normal operation of the receiver and reduce the performance of the communication network.
  • PIM passive intermodulation
  • the coaxial connector is generally mounted on the sidewall of the cavity filter as an integral part of the input and output of the cavity filter signal. Therefore, the intermodulation level and stability of the coaxial connector are particularly important.
  • Conventional coaxial connectors include inner conductors, insulators, flanges, and the like.
  • the inner conductor is mainly used for the transmission of electrical signals; the insulator acts to support the inner conductor; the flange is provided with a screw hole, and the connector can be locked with the screw on the cavity filter.
  • the traditional connector is mainly grounded by the flange and the cavity.
  • a metal ring of 0.2-0.5 mm height is usually arranged on the flange. Due to the different order of installation of the connector screws, the structure is prone to leverage effect. It is difficult to ensure that the metal ring is in linear contact with the cavity.
  • the screw is loose and the locking force is deteriorated, resulting in poor grounding of the connector, affecting the level of passive intermodulation and long-term stability.
  • Another improved solution is to use a threaded connector that has internal (outer) threads in the housing and an outer (inner) thread on the cavity, which are screwed together.
  • the mutual adjustment stability of this method is better than the traditional screw installation method.
  • the disadvantage is that special glue is needed to fix the thread at the time of installation, which makes it difficult to disassemble after installation, it is not convenient to carry out intermodulation maintenance and the connector can not be reused. It is easy to cause material waste.
  • a first object of the present invention is to provide a coaxial connector having a simple structure and high intermodulation stability
  • a second object of the present invention is to provide a filter to which the coaxial connector is applied;
  • a third object of the present invention is to provide a radio frequency device including the above filter.
  • the present invention provides the following technical solutions:
  • a coaxial connector includes a housing, a flange disposed at one end of the housing, and an inner conductor embedded in the housing and insulated from the housing, the flange being tightly disposed at an end remote from the housing a retaining ring circumferentially disposed around the inner conductor extending beyond the flange end face and for inserting the outer device cavity when the coaxial connector is mounted to an outer device cavity
  • the hole is in an interference fit with the external device cavity and is grounded.
  • the fastening ring is integrally formed with the flange.
  • the fastening ring is provided with a guiding portion away from one end of the flange.
  • the guide portion forms a grounding ring for abutting the external device cavity.
  • the fastening ring has an axial length of 4 to 10 mm; an outer diameter of the fastening ring is larger than an inner diameter of the mounting hole, and a difference between the outer diameter and the inner diameter is 0.02 to 0.05 mm .
  • a gap is formed between the fastening ring and the inner conductor, and the gap is filled with an insulating medium.
  • the flange is provided with a waterproof groove for filling the sealing material along the outer edge of the fastening ring.
  • a filter includes a filter cavity and a coaxial connector connected to the filter cavity, the filter cavity is provided with a mounting hole, and the coaxial connector is the coaxial connector described above, The fastening ring is inserted into the mounting hole and has an interference fit with the filter cavity.
  • a resonator column is disposed in the filter cavity, a coupling hole is formed in a middle portion of the resonator column, and the inner conductor extends into the coupling hole and forms a gap therebetween; the filter cavity is provided with a fixing body A support medium supporting the inner conductor.
  • a radio frequency device comprising the above described filter.
  • the coaxial connector of the present invention by providing a fastening ring capable of achieving an interference fit with the mounting hole of the external device cavity, a stable connection between the coaxial connector and the external device cavity, the fastening ring and the fastening ring can be realized. Good linear contact can be maintained between the external device cavities, which can reduce the influence of the external environment on its conventional indicators and improve the stability of the passive intermodulation of the filter.
  • the tail end of the fastening ring is provided with a guiding portion, and the grounding ring is disposed on the end surface of the guiding portion, so that the influence of the dust of the cavity is small, and the coaxial connector is well grounded. In order to ensure the level of passive intermodulation at the bottom.
  • FIG. 1 is a perspective view of a coaxial connector in accordance with an embodiment of the present invention.
  • FIG. 2 is a perspective view of a filter in an embodiment of the present invention.
  • Figure 3 is a cross-sectional view of a filter in accordance with an embodiment of the present invention.
  • Fig. 4 is an enlarged view of a portion A of Fig. 3;
  • the coaxial connector 2 of the present invention can be mounted on the filter cavity 1 as a component of the input and output of the filter signal. It should be understood that the coaxial connector of the present invention can also be used on other external device cavities to form a radio frequency device for processing radio frequency signals together with external devices.
  • the coaxial connector 2 includes a housing 21, a flange 22 disposed at one end of the housing, and an inner conductor 23 embedded in the housing and insulated from the housing.
  • the inner conductor can be in a coaxial connector.
  • the feed coupling extends into the coupling hole in the external device cavity
  • the flange 22 extends away from the end of the outer casing 21 to form a fastening ring 24, the fastening ring 24 surrounds
  • the inner conductor 23 extending from the end surface of the flange 22 is circumferentially disposed, and is insertable into the mounting hole of the outer device cavity to perform an interference fit with the outer device cavity, the fastening ring 24
  • a grounding ring 242 is disposed on the end surface of the tail end to be grounded to the external device cavity.
  • the outer diameter of the fastening ring 24 is larger than the diameter of the mounting hole of the external device cavity, and therefore, when the fastening ring 24 is inserted into the mounting hole of the external device cavity, Pressing the tool into the mounting hole 11 by means of a tool, the fastening ring 24 and the mounting hole 11 can be in an interference state (ie, the mounting hole of the coaxial connector 2 and the external device cavity)
  • the coaxial connector 2 and the mounting hole of the external device cavity have an interference fit to further fix the coaxial connector 2, and ensure the coaxial connector 2 acts externally.
  • the coaxial connector 2 has an interference fit with the mounting hole of the external device cavity to ensure the concentricity of the coaxial connector 2 and the mounting hole of the external device cavity And the end of the inner conductor 23 and the coupling hole 121 From, the inner conductor 23 to avoid a contact hole 121 in the coupling cavity with a filter and a short circuit to further ensure the consistency of port bandwidth.
  • the fastening ring 24 is integrally formed with the flange 22, and the fastening ring 24 has an axial length ranging from 4 to 10 mm.
  • the fastening ring 24 is integrally formed with the flange such that the connection between the fastening ring 24 and the flange 22 is stronger, so that the coaxial connector 2 is mounted in the filter cavity 1 At the time, the overall stability is improved. According to repeated tests by the applicant, it is more convenient to control the coaxial connection under the premise that the fastening ring 24 with the axial length of 4-10 mm is more convenient to realize the interference fit of the fastening ring 24 and the mounting hole.
  • the positional accuracy between the device 2 and the external device cavity is particularly advantageous for increasing the coaxiality between the fastening ring 24 and the mounting hole; the axial length is further preferably 5.5 mm.
  • the ratio of the axial length to the diameter of the fastening ring 24 is 1:1.
  • the thickness of the fastening ring 24 ranges from 0.5 to 3 mm, and the strength of the fastening ring 24 can be maintained at this thickness to ensure that the grounding ring 242 is flat without deformation, and can satisfy the grounding ring 242 and the outside.
  • the contact area of the device is not too large, which is favorable for the pressure of the joint surface of the coaxial connector 2 and the mounting hole of the external device cavity, so that the coaxial connector 2 and the filter cavity 1 are more tightly combined, and the coaxial connector 2 can be ensured. Good grounding, thus ensuring a low level of passive intermodulation.
  • the height and thickness of the fastening ring 24 can be adjusted according to actual needs.
  • one end of the fastening ring 24 remote from the flange 22 is provided with a guiding portion 241.
  • the diameter of the guiding portion 241 is smaller than the mounting hole of the external device cavity by about 0.4 to 1 mm, so as to guide the mounting of the fastening ring 24, so that the fastening ring 24 can be more easily inserted into the external device cavity. Mounting holes in the body.
  • the end surface of the guiding portion 241 forms a grounding ring 242 for abutting against an external device cavity.
  • the grounding ring 242 is disposed on the end surface of the guiding portion 241, and is in contact with the external device cavity after installation, and is less affected by the dust of the cavity; and, since the grounding ring 242 is disposed at the end surface of the guiding portion 241 and is annular,
  • the smaller area is beneficial to increase the pressure of the joint surface of the coaxial connector 2 and the mounting hole of the external device cavity, so that the coaxial connector 2 is more tightly coupled with the filter cavity 1 to ensure that the coaxial connector 2 is well grounded. To ensure a low level of passive intermodulation.
  • a gap (not labeled, the same below) is formed between the fastening ring 24 and the inner conductor 23, and the gap is filled with an insulating medium 25.
  • the insulating medium 25 supports the inner conductor 23 to prevent the inner conductor 23 from vibrating in the external device cavity, causing a short circuit between the tail end and the coupling hole in the external device cavity.
  • the flange 22 is provided with a waterproof groove 221 for filling the sealing material along the outer edge of the fastening ring 24 to function as a seal waterproofing.
  • the sealing material is a waterproof rubber ring 222.
  • the sealing material is not limited to a waterproof rubber ring.
  • the filter 100 includes a filter cavity 1 and a coaxial connector connected to the filter cavity 1.
  • the filter cavity is provided with a mounting hole 11 therein.
  • the coaxial connector is coaxial as described above.
  • a connector 2 the fastening ring 24 is inserted into the mounting hole 11 and has an interference fit with the filter cavity 1.
  • the outer diameter of the fastening ring 24 is larger than the inner diameter of the mounting hole 11, and the difference is The value is between 0.02 and 0.05 mm to facilitate the assembly operation.
  • the inner conductor 23 of the coaxial connector 2 passes through the mounting hole 11 and the cavity hole 13 in sequence, and the tail end thereof is suspended in the coupling hole 121, that is, the inner conductor 23 extends into the coupling hole 121 and Forming a gap, the coupling hole 121 is used for feeding coupling; the flange 22 of the coaxial connector 2 is provided with a plurality of screw holes through which the same can be further fixed by screws A shaft connector 2 and the filter cavity 1.
  • the filter cavity 1 is provided with a support medium for fixedly supporting the inner conductor 23 to prevent the inner conductor 23 from vibrating in the coupling hole.
  • the support medium may be embedded in a gap between the coupling hole 121 and the inner conductor 23; in another embodiment of the present invention, the cavity hole 13 may be The support medium is interposed between the conductors 23.
  • the present invention also provides a radio frequency device (not shown) including the filter 100 described above.
  • the radio frequency device adopts the above coaxial connector 2, which can strengthen the stability of the entire radio frequency device, reduce the influence of the external environment on its conventional indexes, and improve the stability of the radio frequency device.
  • the radio frequency device includes, but is not limited to, a filter, a power splitter, a coupler, a duplexer, a radio frequency amplifier.

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  • Coupling Device And Connection With Printed Circuit (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

本发明提供一种同轴连接器、滤波器及射频器件，所述同轴连接器包括外壳、设于所述外壳一端的法兰及嵌设于所述外壳且与所述外壳绝缘的内导体，所述法兰在远离所述外壳的一端设有紧固环，所述紧固环围绕伸出所述法兰端面的所述内导体周向设置，并用于在所述同轴连接器安装于外部设备腔体时插入所述外部设备腔体的安装孔内与所述外部设备腔体过盈配合且接地连接。本方案中，通过设置能与外部设备腔体的安装孔实现过盈配合的紧固环，实现同轴连接器与外部设备腔体的稳定连接，紧固环与外部设备腔体之间能保持良好的线性接触，从而能减少外部环境对其常规指标的影响，提高滤波器无源互调的稳定性。

Description

同轴连接器及滤波器、射频器件 技术领域
本发明涉及射频通信器件领域，具体而言，本发明涉及一种同轴连接器及应用该同轴连接器的滤波器、射频器件。
背景技术
在现代移动通信系统中，金属腔体滤波器由于其电磁屏蔽性好、通带选择性高、功率容量高和易于批量加工生产等优点，长期以来一直是移动通信系统基站和室内信号分布系统的首选品种。而随着移动通信技术发展，频谱资源日益紧张，基站发射功率越来越高，金属腔体滤波器会在高功率条件下产生无源互调(Passive Intermodulation/PIM)，无源互调功率电平过高，会干扰接收机的正常工作，降低通信网络性能。同轴连接器一般安装在腔体滤波器的侧壁上，作为腔体滤波器信号输入、输出的组成部分，因此同轴连接器的互调水平及稳定性显得尤其重要。
传统的同轴连接器包括内导体、绝缘体、法兰等。其中内导体主要用于电信号的传输；绝缘体起到支撑内导体的作用；法兰上设置有螺钉孔，可用螺钉将连接器锁紧在腔体滤波器上。传统连接器主要靠法兰与腔体进行接地，为改善接地效果，通常在法兰上设置有0.2～0.5mm高的金属环，由于连接器螺钉安装先后顺序不同，该结构容易产生杠杆效应，难以保证金属环与腔体线性接触。在产品受到震动、温度变化情况下容易出现螺钉松动，锁紧力变差的情况，导致连接器接地不良，影响无源互调水平及长期稳定性。
另外一种改良的方案是使用带有螺纹的连接器，这种连接器在外壳加工有内(外)螺纹，同时在腔体上加工出外(内)螺纹，两者通过螺纹旋紧在一起，这种方式互调稳定性较传统的螺钉安装方式要好，缺点是安装时需要在螺纹处涂上特殊的胶水进行固定，使得安装后难以拆卸，不方便进行互调维修且连接器不可重复利用，容易造成物料浪费。
发明内容
本发明的第一目的旨在提供一种结构简单、互调稳定性高的同轴连接器；
本发明的第二目的旨在提供一种应用所述同轴连接器的滤波器；
本发明的第三目的旨在提供一种包括上述滤波器的射频器件。
为了实现上述目的，本发明提供以下技术方案：
一种同轴连接器，包括外壳、设于所述外壳一端的法兰及嵌设于所述外壳且与所述外壳绝缘的内导体，所述法兰在远离所述外壳的一端设有紧固环，所述紧固环围绕伸出所述法兰端面的所述内导体周向设置，并用于在所述同轴连接器安装于外部设备腔体时插入所述外部设备腔体的安装孔内与所述外部设备腔体过盈配合且接地连接。
优选地，所述紧固环与所述法兰一体成型。
优选地，所述紧固环远离所述法兰的一端设有导向部。
优选地，所述导向部形成用于与所述外部设备腔体抵接的接地环。
优选地，所述紧固环的轴向长度为4～10mm；所述紧固环的外径大于所述安装孔的内径，且所述外径与所述内径的差值为0.02～0.05mm。
优选地，所述紧固环与所述内导体之间形成空隙，所述空隙内填充有绝缘介质。
优选地，所述法兰上沿所述紧固环的外缘环设有用于填充密封材料的防水槽。
一种滤波器，包括滤波器腔体及与所述滤波器腔体连接的同轴连接器，所述滤波器腔体开设有安装孔，所述同轴连接器为上述的同轴连接器，所述紧固环插入所述安装孔内并与所述滤波器腔体过盈配合。
优选地，所述滤波器腔体内设有谐振柱，所述谐振柱中部开设有耦合孔，所述内导体伸入所述耦合孔并与之形成间隙；所述滤波器腔体内设有用于固定支撑所述内导体的支撑介质。
一种射频器件，包括上述的滤波器。
相比现有技术，本发明的方案具有以下优点：
1.本发明的同轴连接器中，通过设置能与外部设备腔体的安装孔实现 过盈配合的紧固环，可实现同轴连接器与外部设备腔体的稳定连接，紧固环与外部设备腔体之间能保持良好的线性接触，从而能减少外部环境对其常规指标的影响，提高滤波器无源互调的稳定性。
2.通过采用能与外部设备腔体的安装孔实现过盈配合的紧固环，当其插入外部设备腔体内的安装孔时，能够很好的保证同轴连接器与安装孔的同心度以及内导体末端与耦合孔的间距，从而避免短路的情况以进一步保证端口带宽的一致性。
3.所述紧固环的尾端设有导向部，所述接地环设于所述导向部的端面上，因此，受腔体粉尘的影响较小，同时可保证同轴连接器良好地接地，进而保证交底的无源互调水平。
本发明附加的方面和优点将在下面的描述中部分给出，这些将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解，其中：
图1为本发明实施例中同轴连接器的立体图；
图2为本发明实施例中滤波器的立体图；
图3为本发明实施例中滤波器的剖视图；
图4为图3所示A部区域的放大图。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能解释为对本发明的限制。
如图1所示，为本发明的同轴连接器2，可安装于滤波器腔体1上，作为滤波器信号输入输出的组成部分。应当理解地，本发明的同轴连接器，还可用于其他外部设备腔体上，以与外部设备共同构成用于处理射频信号 的射频器件。
所述同轴连接器2，包括外壳21、设于所述外壳一端的法兰22及嵌设于所述外壳且与所述外壳绝缘的内导体23，所述内导体可在同轴连接器安装于外部设备腔体时，延伸至外部设备腔体内的耦合孔内进行馈电耦合，所述法兰22上远离所述外壳21的一端延伸形成紧固环24，所述紧固环24围绕伸出所述法兰22端面的所述内导体23周向设置，其可插入所述外部设备腔体的安装孔内而与所述外部设备腔体过盈配合，所述紧固环24的尾端的端面上设有接地环242，以与所述外部设备腔体接地连接。
本发明的实施例中，所述紧固环24的外径大于所述外部设备腔体的安装孔的孔径，因此，当所述紧固环24插入所述外部设备腔体的安装孔时，通过工具将其平整地压入安装孔11中，可使得所述紧固环24与所述安装孔11呈过盈状态(即所述同轴连接器2与所述外部设备腔体的安装孔过盈配合)；一方面，所述同轴连接器2与所述外部设备腔体的安装孔过盈配合对同轴连接器2起到进一步固定的作用，保证同轴连接器2在外力作用下或者当固定所述同轴连接器2与外部设备腔体的螺钉出现松动时仍然能够与外部腔体设备保持稳定且不易松动，减少如震动等外部环境对其常规指标的影响，提高滤波器无源互调的稳定性；另一方面，所述同轴连接器2与所述外部设备腔体的安装孔过盈配合可确保同轴连接器2与外部设备腔体的安装孔的同心度以及内导体23末端与耦合孔121的间距，避免内导体23与滤波器腔体1内的耦合孔121接触而短路的情况以进一步保证端口带宽的一致性。
优选地，所述紧固环24与所述法兰22一体成型，并且所述紧固环24的轴向长度范围为4～10mm。所述紧固环24与所述法兰一体成型可使得所述紧固环24与所述法兰22之间的连接更坚固，从而使得所述同轴连接器2安装入滤波器腔体1时，整体的稳固程度得到提高。经申请人多次试验得知，采用轴向长度为4～10mm的紧固环24，在实现紧固环24与安装孔的过盈配合组装更为方便的前提下，更加方便控制同轴连接器2与外部设备腔体之间安装后的位置精度，尤其有利于提高紧固环24与安装孔之间的同轴度；该轴向长度进一步优选为5.5mm。考虑到外部设备腔体 壁厚对安装孔深度以及安装孔深度对紧固环24轴向长度的影响，更为优选的是，该轴向长度与紧固环24的直径比为1:1。本发明实施例中，所述紧固环24的厚度范围为0.5～3mm，在此厚度下能够维持紧固环24的强度，保证接地环242平整不产生形变，同时能够满足接地环242与外部设备接触面积不会太大，有利于同轴连接器2与外部设备腔体内安装孔结合面的压强，使得同轴连接器2与滤波器腔体1结合更加紧密，可保证同轴连接器2良好地接地，进而保证较低的无源互调水平。当然，所述紧固环24的高度及厚度均可根据实际需要进行调整。
优选地，所述紧固环24的远离所述法兰22的一端设有导向部241。所述导向部241的直径比外部设备腔体内安装孔小约0.4～1mm，以在安装所述紧固环24使起到导向作用，使所述紧固环24更容易插入所述外部设备腔体内的安装孔。
优选地，所述导向部241的端面形成用于与外部设备腔体抵接的接地环242。所述接地环242设在导向部241的端面上，安装后与外部设备腔体接触，受腔体粉尘的影响较小；并且，由于接地环242设于导向部241的端面且呈环状，面积较小，有利于增加同轴连接器2与外部设备腔体内安装孔结合面的压强，使得同轴连接器2与滤波器腔体1结合更加紧密，可保证同轴连接器2良好地接地，进而保证较低的无源互调水平。
优选地，所述紧固环24与内导体23之间形成空隙(未标号，下同)，所述空隙内填充有绝缘介质25。所述绝缘介质25对所述内导体23起到支撑作用，以防止所述内导体23在外部设备腔体中颤动导致其尾端与外部设备腔体内的耦合孔接触而发生短路的现象。
优选地，所述法兰22上沿所述紧固环24的外缘环设有用于填充密封材料的防水槽221，以起到密封防水的作用。本发明的一个实施例中，所述密封材料为防水胶圈222，当然，本发明的实施例中，所述密封材料不限于防水胶圈。
图2～4所示为采用所述同轴连接器2的滤波器100。所述滤波器100包括滤波器腔体1及与所述滤波器腔体1连接的同轴连接器，所述滤波器腔体内开设有安装孔11，所述同轴连接器为上述的同轴连接器2，所述紧 固环24插入所述安装孔11内并与所述滤波器腔体1过盈配合，所述紧固环24的外径大于所述安装孔11的内径，其差值在0.02～0.05mm之间，以利于组装操作。
所述滤波器腔体1内还设有与所述安装孔11贯通的腔体孔13，位于所述腔体孔13一侧的谐振柱12，所述谐振柱12中部开设有耦合孔121，所述同轴连接器2的内导体23依次穿过安装孔11和腔体孔13后，其尾端悬空置于耦合孔121内，即所述内导体23伸入所述耦合孔121并与之形成间隙，所述耦合孔121用于进行馈电耦合；所述同轴连接器2的法兰22上设有若干个螺钉孔，通过螺钉穿过所述螺钉孔可以进一步地固定所述同轴连接器2与所述滤波器腔体1。
优选地，所述滤波器腔体1内设有用于固定支撑所述内导体23以防止所述内导体23在所述耦合孔内颤动的支撑介质。本发明的一个实施例中，可在所述耦合孔121与所述内导体23之间的间隙内嵌设所述支撑介质；本发明的另一个实施例中，可在腔体孔13与内导体23之间嵌设所述支撑介质，通过在滤波器腔体1设置所述支撑介质，可以防止所述内导体23在所述耦合孔内颤动而与耦合孔121接触而发生短路的现象。
本发明还提供一种射频器件(未示出)，所述射频器件包括上述的滤波器100。所述射频器件采用上述同轴连接器2，可加强整个射频器件的稳固性，减少外部环境对其常规指标的影响，提高射频器件的稳定性。所述射频器件包括但不限于滤波器、功分器、耦合器、双工器、射频放大器。
以上所述仅是本发明的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (10)

  1. 一种同轴连接器，包括外壳、设于所述外壳一端的法兰及嵌设于所述外壳且与所述外壳绝缘的内导体，其特征在于，所述法兰在远离所述外壳的一端设有紧固环，所述紧固环围绕伸出所述法兰端面的所述内导体周向设置，并用于在所述同轴连接器安装于外部设备腔体时插入所述外部设备腔体的安装孔内与所述外部设备腔体过盈配合且接地连接。
  2. 根据权利要求1所述的同轴连接器，其特征在于，所述紧固环与所述法兰一体成型。
  3. 根据权利要求1所述的同轴连接器，其特征在于，所述紧固环远离所述法兰的一端设有导向部。
  4. 根据权利要求1所述的同轴连接器，其特征在于，所述导向部形成用于与所述外部设备腔体抵接的接地环。
  5. 根据权利要求1所述的滤波器，其特征在于，所述紧固环的轴向长度为4～10mm；所述紧固环的外径大于所述安装孔的内径，且所述外径与所述内径的差值为0.02～0.05mm。
  6. 根据权利要求1所述的同轴连接器，其特征在于，所述紧固环与所述内导体之间形成空隙，所述空隙内填充有绝缘介质。
  7. 根据权利要求1所述的同轴连接器，其特征在于，所述法兰上沿所述紧固环的外缘环设有用于填充密封材料的防水槽。
  8. 一种滤波器，包括滤波器腔体及与所述滤波器腔体连接的同轴连接器，所述滤波器腔体开设有安装孔，其特征在于，所述同轴连接器为权利要求1～7任意一项所述的同轴连接器，所述紧固环插入所述安装孔内并与所述滤波器腔体过盈配合。
  9. 根据权利要求8所述的滤波器，其特征在于，所述滤波器腔体内设有谐振柱，所述谐振柱中部开设有耦合孔，所述内导体伸入所述耦合孔并与之形成间隙；所述滤波器腔体内设有用于固定支撑所述内导体的支撑介质。
  10. 一种射频器件，其特征在于，包括权利要求8或9所述的滤波器。
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