CN203553315U

CN203553315U - A TM mode double-end short circuit resonant unit

Info

Publication number: CN203553315U
Application number: CN201320659317.7U
Authority: CN
Inventors: 梁文超; 刘勇彬; 王飞
Original assignee: Pivotone Communication Technologies Inc
Current assignee: Pivotone Communication Technologies Inc
Priority date: 2013-10-24
Filing date: 2013-10-24
Publication date: 2014-04-16
Anticipated expiration: 2023-10-24

Abstract

The utility model relates to a TM mode double-end short circuit resonant unit comprising a resonant cavity, wherein a cover plate is arranged at a mouth portion of the resonant cavity, and a TM mode resonator is arranged in the resonant cavity. The resonator is tubular. A gasket is arranged between the upper end of the resonator and the cover plate. The gasket is elastic. A screw hole and a nail hole are formed on the cover plate corresponding to the center of the resonant cavity and on the center of the gasket respectively, and a tuning screw is arranged in the screw hole and the nail hole. The TM mode double-end short circuit resonant unit is characterized in that a silvered coating is arranged on the inner side face of a lower section of the resonator. With the use of the TM mode double-end short circuit resonant unit, the volume of a TM mode double-end short circuit filter can be reduced, a Q value of the TM mode double-end short circuit filter can be increased, the loss of the TM mode double-end short circuit filter can be reduced, and short circuit failure cased of the TM mode double-end short circuit filter can be prevented. The TM mode double-end short circuit resonant unit is applicable to communication equipment of a wireless base station.

Description

A kind of TM mould both-end short circuit resonant element

Technical field

The utility model relates to a kind of filter, specifically, is the resonant element on the filter of TM mould both-end short circuit.Be applicable on the communication equipment of wireless base station.

Background technology

Along with the high speed development of the communication technology, more and more higher to the components and parts requirement of radio communication base station, low-loss, miniaturization components and parts are more and more subject to the welcome of communications equipment manufacturer.Although TM mould both-end short circuit resonator can be realized miniaturization at present, performance is very unstable.For retention is stable, the sacrifice small size of just must take is cost.Therefore, the resonator of current TM mould both-end short circuit adopts homogenous material to make, make its volume still large, Q value is less, loss is larger.In addition, in the resonant element of current TM mould both-end short circuit, the upper end of TM mould resonator is flat mouth, and the pad arranging between itself and cover plate is also for dull and stereotyped, inevitable mismachining tolerance and being heated expanding with heat and contract with cold after catching a cold,, there is signal of telecommunication leakage problem in the failure phenomenon that is all easily short-circuited.

Utility model content

Problem to be solved in the utility model is to provide a kind of TM mould both-end short circuit resonant element.Adopt this TM mould both-end short circuit resonant element, not only can dwindle the loss of the volume of TM mould both-end short circuit filter, the Q value that increases TM mould both-end short circuit filter, reduction TM mould both-end short circuit filter, also can avoid TM mould both-end short circuit filter short-circuit failure situation to occur.

For addressing the above problem, take following technical scheme:

TM mould both-end short circuit resonant element of the present utility model comprises resonant cavity, and the oral area of resonant cavity has cover plate, has TM mould resonator in resonant cavity.Described TM mould resonator is tubulose, between its upper end and described cover plate, has pad, and described pad is elastomeric pad.There are respectively screw and nail hole on the cover plate corresponding with resonant cavity center and the center of described pad, in screw and nail hole, has tuning screw.Be characterized in there is silver coating on the hypomere medial surface of described TM mould resonator.

Further improvement of the utility model scheme is, the lower surface area of described pad is less than its upper surface area, and making its periphery is lower little large taper.

Further improvement project of the present utility model is that inner side, described TM mould resonator upper end is useful on the peripheral chamfer coordinating with described pad periphery.

Take such scheme, have the following advantages:

As can be seen from the above scheme, owing to having silver coating on the hypomere medial surface at described resonator 3, the volume that has dwindled TM mould both-end short circuit filter, makes under same frequency, and TM mould both-end short circuit resonant element of the present utility model only has 2/3 of traditional TM mould both-end short circuit resonant element.And the Q value of TM mould both-end short circuit filter is 2 times of equal metal coaxial (should with there is no silver-plated ratio) filter, increased Q value, reduced loss.

Lower surface area due to described pad is less than its upper surface area again, and making its periphery is lower little large taper.Inner side, described resonator upper end is useful on the peripheral chamfer coordinating with described pad periphery.And described pad is elastomeric pad, makes can closely cooperate between the surrounding of described pad and the chamfering of resonator upper end, thereby avoided due to mismachining tolerance and the short-circuit failure phenomenon causing of expanding with heat and contract with cold of being heated after catching a cold occurs.

Accompanying drawing explanation

Fig. 1 is TM mould both-end short circuit resonant element structural representation of the present utility model.

Embodiment

As shown in Figure 1, TM mould both-end short circuit resonant element of the present utility model comprises resonant cavity 3, and described resonant cavity 3 is circular blind hole, and it is adopt thick aluminium sheet and process in the one side of thick aluminium sheet.The oral area of resonant cavity 3 is provided with cover plate 4, is provided with TM mould resonator 1 in resonant cavity 3.Described TM mould resonator 1 is pipe, and 4 of its upper end and described cover plates are provided with pad 6, and described pad 6 is for being elastomeric pad.On the cover plate 4 corresponding with resonant cavity 3 centers and the center of described pad 6 is processed with respectively screw and nail hole, in described screw and nail hole, is furnished with tuning screw 5, described tuning screw 5 revolved successively screw cover plate 4 above cover plate 4, through behind the nail hole on pad 6, stretch in the upper end of described TM mould resonator 1.For more effectively reduce TM mould both-end short circuit resonant element frequency, dwindle the volume of TM mould both-end short circuit resonant element, increase the Q value of TM mould both-end short circuit resonant element, the loss of reduction TM mould both-end short circuit resonant element, on the hypomere medial surface of described TM mould resonator 1, be coated with silver coating 7.

For making can to closely cooperate between described pad 6 and TM mould resonator 1 upper end, avoid occurring due to the short-circuit failure phenomenon that loose contact that mismachining tolerance and being heated expanding with heat and contract with cold after catching a cold causes produces, in the utility model, pad 6 used is elastomeric pad, and the surrounding of described pad 6 is processed into inclined-plane, make the lower surface area of described pad 6 surroundings be less than its upper surface area, the periphery that makes pad 6 is lower little large taper.For ease of described TM mould resonator 1 upper end and described pad, closely cooperate, described TM mould resonator 1 inner side, upper end is processed with the peripheral chamfer 2 for coordinating with described pad periphery.

Through experiment test, under same frequency, the volume of TM mould both-end short circuit resonant element of the present utility model only has 2/3 of traditional TM mould both-end short circuit resonant element.And the Q value of TM mould both-end short circuit resonator is 2 times of equal metal coaxial (should with there is no silver-plated ratio) resonator, increased Q value, reduced loss.

Claims

1. a TM mould both-end short circuit resonant element, comprises resonant cavity (3), and the oral area of resonant cavity (3) has cover plate (4), has TM mould resonator (1) in resonant cavity (3); Described TM mould resonator (1) is tubulose, have pad (6), and described pad (6) is elastomeric pad between its upper end and described cover plate (4); There are respectively screw and nail hole in the cover plate (4) corresponding with resonant cavity (3) center center upper and described pad (6), in screw and nail hole, has tuning screw (5); It is characterized in that there is silver coating (7) on the hypomere medial surface of described TM mould resonator (1).

2. TM mould both-end short circuit resonant element according to claim 1, is characterized in that the lower surface area of described pad (6) is less than its upper surface area, and making its periphery is lower little large taper.

3. TM mould both-end short circuit resonant element according to claim 2, is characterized in that inner side, described TM mould resonator (1) upper end is useful on the peripheral chamfer (2) coordinating with described pad (6) periphery.