CN203562498U - A cavity filter - Google Patents
A cavity filter Download PDFInfo
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- CN203562498U CN203562498U CN201320572917.XU CN201320572917U CN203562498U CN 203562498 U CN203562498 U CN 203562498U CN 201320572917 U CN201320572917 U CN 201320572917U CN 203562498 U CN203562498 U CN 203562498U
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- cavity
- cover plate
- resonator
- screw rod
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Abstract
The utility model discloses a cavity filter comprising a cavity, a cover plate, resonators, tuning screw rods, and screw nuts. The resonators are fixed on the base plate of the cavity and accommodated in the cavity. The cover plate is fixedly installed at the opening of the cavity and is equipped with screw rod receiving orifices. The tuning screw rods cooperate with the screw rod receiving orifices and one end of each tuning screw rod passes through the cover plate to be inserted into the cavity. The resonators are produced by low-carbon steel material. The cavity filter has a beneficial effect that the resonators are produced by low-carbon steel material with low thermal conductance and low heat transfer efficiency. Therefore, no matter the cavity filter operates in high-temperature or low-temperature environment, temperature in the cavity is not changed heavily. Thus, the cavity filter is guaranteed to stably operate and prevented from being influenced by ambient environment.
Description
Technical field
The utility model belongs to communication technical field, is specifically related to a kind of cavity body filter.
Background technology
Filter is a kind of device that electromagnetic wave signal is had to processing effect, and its Main Function is: allow useful signal zero-decrement passing through as far as possible, the reflection large as far as possible to unwanted signal.At present, in base station system, generally adopt cavity body filter to carry out frequency selection to transmitting or receiving signal.Cavity body filter generally includes cavity, resonant rod, resonance screw rod and cover plate.Cavity is provided with a plurality of cavitys, and resonant rod is combined with cavity, and is contained in cavity, and cover plate is arranged on the opening part of cavity.At present, in filter construction, between screw rod and cover plate, be mostly threaded engagement, traditional filter splicing ear adopts double nut to be fixed external copper bar, the contact area of copper bar and nut is larger, but be threaded connection between nut and splicing ear, it is actual, and effectively conductive contact area is less, its resistance is large, cause the temperature rise of splicing ear very fast, splicing ear easily produces electrochemical reaction in junction, produce oxide, cause loose contact between splicing ear and external copper bar, affected the normal work of filter.The resonator of prior art is brass material, and because the heat transfer efficiency of brass is high, thereby it is larger to cause the temperature of filter in high temperature or low temperature environment to be waftd, and the electricity function index of cavity body filter declines, and can not meet work requirements.
Utility model content
The utility model provides a kind of cavity body filter, to solve the resonator of existing filter, is brass material, causes the temperature of filter to be waftd larger, cannot meet the technical problem of work requirements.
In order to solve above technical problem, the technical scheme that the utility model is taked is:
A kind of cavity body filter, described cavity body filter comprises cavity, cover plate, resonator, tuning screw and nut, described resonator is fixed on the base plate of described cavity and is contained in described cavity, described cover plate is fixedly mounted on the opening part of described cavity, on described cover plate, be provided with screw rod receiving orifice, described tuning screw coordinates with described screw rod receiving orifice and one end is stretched in described cavity through described cover plate, and described resonator is low-carbon steel material.
Be preferably, in described well floor, be provided with round boss, the inwall of described resonator and the outer wall of described round boss are fixed.
Be preferably described resonator and described round boss interference fit.
Be preferably, described screw rod receiving orifice has two.
After adopting technique scheme, the resonator of the utility model cavity body filter is low-carbon steel material, and the thermal conductivity of mild steel is low, and heat transfer efficiency is low.Therefore no matter cavity body filter works in hot environment or low temperature environment, and the temperature of inside cavity can not have a greater change, and has guaranteed cavity body filter working stability, has avoided cavity body filter to be subject to the impact of surrounding enviroment.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the topology view of the utility model cavity body filter;
Fig. 2 is the decomposition view of the utility model cavity body filter;
Fig. 3 is the cutaway view of the utility model cavity body filter;
Fig. 4 is the topology view of the resonator of the utility model cavity body filter.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figures 1 to 4, cavity body filter comprises cavity 1, cover plate 2, resonator 3, tuning screw 4 and the nut 5 of upper end open.Wherein on the base plate of cavity 1, be provided with 2 round boss 11, on cover plate 2, be provided with 2 screw rod receiving orifices 21, the lower end of resonator 3 is fixed on the round boss 11 of cavity 1 and is contained in cavity 1, and the outer wall of the inwall of resonator 3 and round boss 11 is fixed.Because the inner diameter of resonator 3 is slightly less than the diameter of round boss 11, when fixing resonance device 3, by crimping or the mode that presses, the lower end of resonator 3 is pressed into round boss 11, thereby realize resonator 3, be connected with the interference fit of round boss 11.
Because the centre of resonator 3 is provided with through hole, tuning screw 4 stretches in through hole and an outer ancient piece of jade, round, flat and with a hole in its centre for resonator 3 and the round boss 11 of cavity 1 are fixedly connected with, therefore in the vertical direction tuning screw can stretch into the base plate position that approaches cavity 1, through hole in resonator 3 can be fully utilized and realize the adjusting of tuning screw 4 like this, thereby reaches the adjustable range that improves filter frequencies.
First the lower end of resonator 3 is fixed on the round boss 11 of cavity 1, then tuning screw 4 is arranged on resonator 3.Cover plate 2 is finally installed, and tuning screw 4 is through screw rod receiving orifice 21, and fastening nut 5, thereby resonator 3 is fixed between cavity 1 and cover plate 2 firmly.
The resonator 3 of the utility model cavity body filter is low-carbon steel material, and the thermal conductivity of mild steel is low, and heat transfer efficiency is low.Therefore no matter cavity body filter works in hot environment or low temperature environment, and the temperature of cavity 1 inside can not have a greater change, and has guaranteed cavity body filter working stability, has avoided cavity body filter to be subject to the impact of surrounding enviroment.
Finally it should be noted that: above embodiment only illustrates the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (4)
1. a cavity body filter, it is characterized in that, described cavity body filter comprises cavity, cover plate, resonator, tuning screw and nut, described resonator is fixed on the base plate of described cavity and is contained in described cavity, described cover plate is fixedly mounted on the opening part of described cavity, on described cover plate, be provided with screw rod receiving orifice, described tuning screw coordinates with described screw rod receiving orifice and one end is stretched in described cavity through described cover plate, and described resonator is low-carbon steel material.
2. cavity body filter according to claim 1, is characterized in that, in described well floor, is provided with round boss, and the inwall of described resonator and the outer wall of described round boss are fixed.
3. cavity body filter according to claim 2, is characterized in that, described resonator and described round boss interference fit.
4. cavity body filter according to claim 1, is characterized in that, described screw rod receiving orifice has two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320572917.XU CN203562498U (en) | 2013-09-16 | 2013-09-16 | A cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320572917.XU CN203562498U (en) | 2013-09-16 | 2013-09-16 | A cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203562498U true CN203562498U (en) | 2014-04-23 |
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ID=50512199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320572917.XU Expired - Lifetime CN203562498U (en) | 2013-09-16 | 2013-09-16 | A cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203562498U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016183818A1 (en) * | 2015-05-20 | 2016-11-24 | 华为技术有限公司 | Filter and electromagnetic apparatus |
-
2013
- 2013-09-16 CN CN201320572917.XU patent/CN203562498U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016183818A1 (en) * | 2015-05-20 | 2016-11-24 | 华为技术有限公司 | Filter and electromagnetic apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Cavity filter and test system and method thereof Effective date of registration: 20180521 Granted publication date: 20140423 Pledgee: Bank of China Limited by Share Ltd. Ningbo Yinzhou branch Pledgor: NINGBO HUACI COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: 2018330000105 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20201030 Granted publication date: 20140423 Pledgee: Bank of China Limited by Share Ltd. Ningbo Yinzhou branch Pledgor: NINGBO HUACI COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: 2018330000105 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CP03 | Change of name, title or address |
Address after: 315000 floor 1-2, building 8, 818 Jinyuan Road, Yinzhou District, Ningbo City, Zhejiang Province Patentee after: Ningbo Huaci Communication Technology Co.,Ltd. Address before: 2 / F, building 3, 818 Jinyuan Road, Yinzhou investment and entrepreneurship center, Ningbo, Zhejiang 315100 Patentee before: NINGBO HUACI COMMUNICATION TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140423 |
|
| CX01 | Expiry of patent term |