CN203166048U - Mixed-mode radio frequency/microwave band elimination filter - Google Patents
Mixed-mode radio frequency/microwave band elimination filter Download PDFInfo
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- CN203166048U CN203166048U CN 201320071450 CN201320071450U CN203166048U CN 203166048 U CN203166048 U CN 203166048U CN 201320071450 CN201320071450 CN 201320071450 CN 201320071450 U CN201320071450 U CN 201320071450U CN 203166048 U CN203166048 U CN 203166048U
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- harmonic oscillator
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- radio frequency
- cylindrical cavity
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Abstract
The utility model relates to a mixed-mode radio frequency/microwave band elimination filter. The mixed-mode radio frequency/microwave band elimination filter comprises a body and a covering plate. One surface, which is adjacent to the covering plate, of the body is provided with round cavities, and harmonic oscillators are arranged in the round cavities. An input terminal and an output terminal are respectively arranged on two opposite side walls of the body, the covering plate is provided with a groove, the groove is arranged in the surface, which is adjacent to the covering plate, of the body, a coupled transmission line is arranged in the groove, and two ends of the coupled transmission line are respectively connected with the input terminal and the output terminal. Taps are arranged on the transmission line and are equal to the round cavities in number, and the taps extend into corresponding round cavities in a one-to-one correspondence mode. The mixed-mode radio frequency/microwave band elimination filter is characterized in that each harmonic oscillator is formed by hybrid configuration of a metal harmonic oscillator and a medium harmonic oscillator. The filter of the structure is capable of avoiding influences on communication system performance, is low in manufacturing cost, and can be easily accepted by users.
Description
Technical field
The utility model relates to a kind of filter.Specifically, be the mixed mould RF band stop filter that radio communication base station is used.
Background technology
At present, the RF band stop filter that uses in the radio communication base station all is conventional filter.This conventional filter contains body and cover plate, on the body one side adjacent with cover plate cylindrical cavity is arranged, and harmonic oscillator is arranged in the cylindrical cavity.Body has input terminal and lead-out terminal respectively on the relative two side, and is fluted on the cover plate, and this groove is on the body one side adjacent with cover plate, and coupled transmission line is arranged in the groove, and the two ends of coupled transmission line link to each other with lead-out terminal with input terminal respectively.Tap is arranged on the transmission line, and described number of taps equates with described cylindrical cavity quantity, and described tap is stretched in the corresponding cylindrical cavity correspondingly.Harmonic oscillator wherein or be single metal harmonic oscillator fully, or be single dielectric resonance fully.The response curve of the filter of this structure is seen the curve among Fig. 2, and the band stop filter of all-metal harmonic oscillator has bigger differential loss, can appreciable impact be arranged to the performance of communication system.Then cost is very expensive for the band stop filter of full dielectric resonance.
The utility model content
Problem to be solved in the utility model provides a kind of mixed mould RF band stop filter.This mixed mould RF band stop filter in the band resistance and differential loss specification requirement of asymmetry, with a spot of (to mostly) dielectric resonance, has improved passband differential loss and distortion in a large number, and price also can be accepted (with respect to full dielectric filter) simultaneously.
For addressing the above problem, take following technical scheme:
Mixed mould RF band stop filter of the present utility model comprises body and cover plate, on the body one side adjacent with cover plate cylindrical cavity is arranged, and harmonic oscillator is arranged in the cylindrical cavity.Input terminal and lead-out terminal are arranged respectively on the two lateral walls of body, and fluted on the described cover plate, this groove is on the body one side adjacent with cover plate, and coupled transmission line is arranged in the groove, and the two ends of coupled transmission line link to each other with lead-out terminal with input terminal respectively.Tap is arranged on the transmission line, and described number of taps equates with described cylindrical cavity quantity, and described tap is stretched in the corresponding cylindrical cavity correspondingly.Be characterized in that described harmonic oscillator is formed by metal harmonic oscillator and the sub-mixed configuration of dielectric resonance.
The further improvement of the utility model scheme is, described metal harmonic oscillator is in low frequency end, dielectric resonance is in front end, and perhaps the metal harmonic oscillator is in front end, dielectric resonance is in low frequency end.
Take such scheme, have the following advantages:
By such scheme as can be seen, because the harmonic oscillator of filter of the present utility model is to be formed by metal harmonic oscillator and the sub-mixed configuration of dielectric resonance.Make its front end or low frequency end steeper (at specification, system requirements), namely slope becomes big.Thereby reduced differential loss, improved power output, the situation of having avoided output signal distortion, expensive user to be difficult to receive takes place.
Description of drawings
Fig. 1 is mixed mould RF band stop filter structure schematic diagram of the present utility model;
Fig. 2 is the A-A cross-sectional schematic of Fig. 1;
Fig. 3 is conventional filter response curve and the filter response curve contrast figure of the present utility model that adopts single metal harmonic oscillator or single dielectric resonance.
Embodiment
As depicted in figs. 1 and 2, mixed mould RF band stop filter of the present utility model comprises body 4 and cover plate, and described body 4 is aluminium alloy plate, is processed with a plurality of cylindrical cavities 1 on its one side, the concrete quantity of cylindrical cavity 1 is decided with needs, is example with six cylindrical cavities 1 in the present embodiment.Is furnished with cover plate on the one side adjacent with cylindrical cavity 1 oral area.Be provided with harmonic oscillator 3 in each cylindrical cavity 1.Difference cross machine hole on relative two sidewalls of body 4, be separately installed with input terminal 2 and lead-out terminal 8 in two transverse holes, be processed with groove 5 on the described cover plate, this groove is on the body adjacent with cover plate 4 one sides, be provided with coupled transmission line 6 in the groove 5, the two ends of coupled transmission line 6 link to each other with lead-out terminal 8 with input terminal 2 respectively.Be processed with tap 7 on the coupled transmission line 6, the quantity of described tap 7 equates with described cylindrical cavity 1 quantity, and described tap 7 is stretched in the corresponding cylindrical cavity 1 correspondingly.Described harmonic oscillator 3 contains three metal harmonic oscillators and three dielectric resonance, described three metal harmonic oscillators and three dielectric resonance are arranged successively according to the order of first metal harmonic oscillator, back dielectric resonance, make three metal harmonic oscillators and three dielectric resonance be in low frequency end and front end respectively.
In concrete the application, be with the metal harmonic oscillator be arranged on low frequency end, dielectric resonance is arranged on front end, still the metal harmonic oscillator is arranged on front end, dielectric resonance is arranged on low frequency end, this will see it is that the low frequency end differential loss is important, or the front end differential loss is important.If the low frequency end differential loss is important, dielectric resonance just is arranged on low frequency end.Otherwise if the front end differential loss is important, dielectric resonance just is arranged on front end.Be that the front end differential loss is important in the present embodiment, so low frequency end is that the first ~ three cylindrical cavity 1 interior three harmonic oscillators 3 are the metal harmonic oscillator, front end i.e. the 4th ~ six cylindrical cavity 1 interior harmonic oscillator 3 is dielectric resonance.。
In two response curves shown in Figure 3, curve 3 is response curves of the filter of single metal harmonic oscillator, curve 1 is the response curve of the filter of single dielectric resonance, and curve 2 is response curves of the filter that is made of three metal harmonic oscillators of low frequency end and three dielectric resonance of front end.By curve 3 as can be seen, the response curve front end of the filter of single metal harmonic oscillator is more smooth, and namely slope is less.Make that the differential loss of this filter is bigger, power output is low, the output signal distortion, and the user is difficult to receive.And curve 1 steeper, namely slope becomes big.Thereby reduced differential loss, improved power output, avoided output signal distortion, still expensive, the user also is difficult to accept.What curve 2 showed is that three harmonic oscillators of low frequency end are the response curve that metal harmonic oscillator, three harmonic oscillators of front end are the filter of dielectric resonance, this means that front end is important, so only at front end dielectric resonance is set, makes the user acceptant.
Claims (2)
1. a mixed mould RF band stop filter comprises body (4) and cover plate, on the body one side adjacent with cover plate cylindrical cavity (1) is arranged, and harmonic oscillator (3) is arranged in the cylindrical cavity (1); Input terminal (2) and lead-out terminal (8) are arranged respectively on the two lateral walls of body (4), fluted on the described cover plate, this groove is on the body adjacent with cover plate (4) one side, coupled transmission line (6) is arranged in the groove, and the two ends of coupled transmission line (6) link to each other with lead-out terminal (8) with input terminal (2) respectively; Tap (7) is arranged on the coupled transmission line (6), and the quantity of described tap (7) equates with the quantity of described cylindrical cavity (1), and described tap (7) is stretched in the corresponding cylindrical cavity (1) correspondingly; It is characterized in that described harmonic oscillator (3) is formed by metal harmonic oscillator and the sub-mixed configuration of dielectric resonance.
2. mixed mould RF band stop filter according to claim 1 is characterized in that described metal harmonic oscillator is in low frequency end, dielectric resonance is in front end, and perhaps the metal harmonic oscillator is in front end, dielectric resonance is in low frequency end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320071450 CN203166048U (en) | 2013-02-07 | 2013-02-07 | Mixed-mode radio frequency/microwave band elimination filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320071450 CN203166048U (en) | 2013-02-07 | 2013-02-07 | Mixed-mode radio frequency/microwave band elimination filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166048U true CN203166048U (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320071450 Expired - Fee Related CN203166048U (en) | 2013-02-07 | 2013-02-07 | Mixed-mode radio frequency/microwave band elimination filter |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107392A (en) * | 2013-02-07 | 2013-05-15 | 江苏贝孚德通讯科技股份有限公司 | Mixed-mode radio frequency/microwave band elimination filter |
| CN106816675A (en) * | 2017-03-10 | 2017-06-09 | 京信通信系统（中国）有限公司 | Cavity type bandstop filter and radio-frequency devices |
| CN111384547A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Filter applied to 5G communication system and communication equipment |
| CN115360489A (en) * | 2022-09-21 | 2022-11-18 | 昆山立讯射频科技有限公司 | Filter |
-
2013
- 2013-02-07 CN CN 201320071450 patent/CN203166048U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107392A (en) * | 2013-02-07 | 2013-05-15 | 江苏贝孚德通讯科技股份有限公司 | Mixed-mode radio frequency/microwave band elimination filter |
| CN106816675A (en) * | 2017-03-10 | 2017-06-09 | 京信通信系统（中国）有限公司 | Cavity type bandstop filter and radio-frequency devices |
| CN106816675B (en) * | 2017-03-10 | 2019-12-17 | 京信通信系统（中国）有限公司 | Cavity type band-stop filter and radio frequency device |
| CN111384547A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Filter applied to 5G communication system and communication equipment |
| CN111384547B (en) * | 2018-12-29 | 2022-07-12 | 大富科技(安徽)股份有限公司 | Filter applied to 5G communication system and communication equipment |
| CN115360489A (en) * | 2022-09-21 | 2022-11-18 | 昆山立讯射频科技有限公司 | Filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20200207 |