Patent Application
20150364849
This application claims the benefit of priority to Chinese Patent Application No. 201520425370.X, filed on Jun. 18, 2015, which is hereby incorporated by reference in its entirety.
The present invention relates to a radio frequency communication technology, and more particularly to a connector for a cavity filter.
Cavity filter serving as a frequency selection means is widely used in a field of communications, especially in a field of radio communications. In a base station, the cavity filter is used for selecting communication signals and filtering out clutters or interference signals beyond the frequency of the communication signals.
The cavity filter includes a cavity, a cover plate, a connector and a resonance tube, the cover plate is located on a top surface of the cavity, the cavity includes a cavity sidewall and several isolation ribs for isolating the cavity to a resonant cavity, and the connector is generally mounted on a side or a bottom of the cavity, sometimes is needed to be mounted on the top surface of the cavity.
As shown in
and then mounting the connector 21 in the mounting slot 20, welding an inner conductor 210 of the connector 21 to a cable 22, the cable 22 passes through the mounting slot 20 and enters into the resonant cavity, the cable 22 is welded to the resonance tube 23 in the resonant cavity so as to propagate signals between the inner conductor 210 of the connector 21 and the resonant cavity.
However, the conventional connector has the following disadvantages: (1) a mounting slot is needed for mounting the connector, which limits space thereof to a certain extent; (2) the connector has a decentralized structure, vibrations are easily generated between the components of the connector, and accumulated assembly tolerances would exist in assembly, the components thereof require multiple welding points for connecting, thereby affecting communication quality; (3) high cost.
An objective of the present invention is to provide a connector adapted for a cavity filter having an integrated structure, which does not need mounting slot for mounting the connector, thereby simplifying mounting operations, improving communication quality and reducing costs.
To achieve the objective, a connector adapted for a cavity filter is provided, which includes a housing, a contact pin, an insulating member, a positioning pin, and a transmission line, the housing has a receiving space with a top opening and a side opening, a mounting base is formed by outwardly protruding from the top opening of the housing, a mounting hole is opened in the mounting base for fixing the housing, the insulating member has a hollow structure and is fixedly configured in the housing, a connecting hole is opened in the contact pin, two positioning holes corresponding to the connecting hole are opened in the insulating member, a lower end of the contact pin is inserted into the top opening and through the insulating member, an upper end of the contact pin is located outside the housing, the positioning pin is sequentially inserted through one of the two positioning holes, the connecting hole and the other of the two positioning holes so as to fix the contact pin and the insulating member, one end of the transmission line is inserted into the receiving space from the side opening and fixedly connected with the lower end of the contact pin, and the other end of the transmission line is adapted for connecting with a resonance tube of the cavity filter.
In comparison with the prior art, the connector adapted for a cavity filter includes a housing, a contact pin, an insulating member, a positioning pin and a transmission line, wherein the insulating member is fixedly configured in the housing, the contact pin and the insulating member are fixedly connected by the connecting hole, the positioning holes and the positioning pin, and the transmission line is inserted into the housing and fixedly connected with the lower end of the contact pin. The connector has an integrated structure because the various components of the connector are fixedly connected, and the connector can be fixedly mounted just by means of the mounting hole in the housing without providing mounting slot for the connector, thereby simplifying mounting operations, reducing costs, avoiding multiple welding points due to the integrated structure of the connector, and improving communication quality.
Preferably, the housing includes a first housing portion, a second housing portion and a cover, the first housing portion includes a first cylindrical body having a bottom wall and a second cylindrical body fixedly formed on the bottom wall and located outside the first cylindrical body, a first through-hole whose diameter is equal to the inner diameter of the second cylindrical body is opened in the bottom wall of the first cylindrical body corresponding to the second cylindrical body, the second housing portion includes a vertical cylindrical portion and a horizontal cylindrical portion configured on a side wall of the vertical cylindrical portion and communicating with the vertical cylindrical portion, an upper end of the vertical cylindrical portion fixedly sleeves the second cylindrical body, the cover closes a lower opening of the vertical cylindrical portion, and an opening of the a horizontal cylindrical portion that is far from the vertical cylindrical portion forms the side opening.
Preferably, the insulating member includes a cylinder accommodated in the first cylindrical body, a second through-hole that allows the contact pin to be inserted through is opened at the center of the cylinder and along the vertical axis thereof, a plurality of ribs are formed on an outside wall of an upper end of the cylinder, a plurality of slots corresponding to the ribs are configured on an inner wall of the first cylindrical body, and the ribs fixedly engages with the slots.
Preferably, the insulating member further includes a panel configured on a top of the cylinder, a third through-hole is opened in the panel at a position corresponding to the second through-hole, a recess whose inner diameter is larger than the inner diameter of the top opening is opened in the mounting base at a position corresponding to the top opening, and the panel is abutted against a bottom wall of the recess when the cylinder is accommodated in the first cylindrical body.
Preferably, the connector adapted for a cavity filter further includes a protective sleeve, and the protective sleeve is put on both the horizontal cylindrical portion and part of the transmission line.
Preferably, the type of the protective sleeve is HST.
Preferably, the connector adapted for a cavity filter further includes a U-shaped insulating member, and the U-shaped insulating member is accommodated in the housing and contacts with the transmission line and the contact pin.
Preferably, the transmission line and the contact pin are fixed by welding.
The present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings used to illustrate embodiments of the invention.
a is a perspective view of a conventional connector adapted for a cavity filter;
b is an exploded view of the connector in
Preferred embodiments of the present invention will be described taking in conjunction with the accompanying drawings below, and a similar component label in drawings refers to a similar component.
Please refer to
In comparison with the prior art, the connector 100 adapted for a cavity filter has an integrated structure, and the connector 100 can be fixedly mounted just by means of the mounting hole 123 in the housing 12 without providing mounting slot for the connector 100, thereby simplifying mounting operations and reducing costs, meanwhile the integrated structure of the connector provides stable connection, avoids assembly tolerances and multiple welding points, and improves communication quality.
Concretely, as shown in
In addition, as shown in
Referring to
While the present invention has been described in connection with what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201520425370.X | Jun 2015 | CN | national |
