CN2297806Y - Band-pass and band-stop filter capable of raising band-pass filtering rejection - Google Patents
Band-pass and band-stop filter capable of raising band-pass filtering rejection Download PDFInfo
- Publication number
- CN2297806Y CN2297806Y CN 97209391 CN97209391U CN2297806Y CN 2297806 Y CN2297806 Y CN 2297806Y CN 97209391 CN97209391 CN 97209391 CN 97209391 U CN97209391 U CN 97209391U CN 2297806 Y CN2297806 Y CN 2297806Y
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- CN
- China
- Prior art keywords
- band
- filter
- pass
- stop filter
- cavity
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a band pass and band stop filter which can improve the band pass filtering suppression. A first order to third order band stop filter is arranged in a cavity, and the band stop filter is connected to a band pass filter though a coaxial cable. The suppression of the filter is improved through the combination of the band stop filter and the band pass filter. So utility model can meet the index of small inner band insertion damage and high requirement of the outer band attenuation.
Description
The utility model relates to a kind of bandpass and band-rejection filter.
Band pass filter is the passive electronic of using always, is widely used in various rf terminals.
Because existing filter is when Insertion Loss is very little, such as 1dB, high-end or low side attenuation outside a channel degree can not reach more than the 65dB.Thereby can not satisfy special instructions for use.When attenuation outside a channel being required when very high, under the little situation of passband Insertion Loss, existing filter is difficult to satisfy simultaneously Insertion Loss and attenuation outside a channel index in the band.Insertion Loss when being less than or equal to 1dB in passband is 900-925MHZ, band for example, during the outer 945MHZ of the outer 880MHZ of low side band, high-end band, requiring to decay is greater than or equal to 70dB.
The purpose of this utility model is to provide a kind of bandpass and band-rejection filter that can improve bandpass filtering inhibition degree, to satisfy little and the high-end and demanding index of low side attenuation outside a channel degree of Insertion Loss in the band simultaneously.
For achieving the above object, the technical solution of the utility model is:
(1) is provided with one group of band resistance formula filter (2) and a band general formula filter (3) in a cavity, and with coaxial cable (4) it is linked to each other.Input socket (5) and output socket (6) are housed on the cavity.Also can use a base plate without cavity instead and dispose one group of band group formula filter and band general formula filter, link to each other with coaxial cable equally.And input, output socket be installed on base plate.
The utility model is improved the high and low end inhibition degree of band pass filter owing to adopted band resistance formula filter and the combination of band general formula filter.Thereby can satisfy the demanding index of the little and high and low end attenuation outside a channel of Insertion Loss in the band simultaneously.
As an embodiment, the related cavity (1) of the utility model is a garden shape or square metal cylinder.Placing band resistance formula filter (2) in the cavity is the polyphone of single order or second order, three rank filters, links to each other with band pass filter (3) by coaxial cable (4) again.The line style of coaxial cable should be complementary with band stop filter that is connected and band pass filter.
Claims (3)
1, a kind of bandpass and band-rejection filter that improves the logical inhibition degree of band, it is characterized in that: one group of band resistance formula filter (2) and a band general formula filter (3) are housed in cavity (1), and make it to link with coaxial cable (4), cavity is equipped with input socket (5) and output socket (6) outward.
2, according to the filter described in the claim 1, it is characterized in that: group band resistance formula filter is made up of single order to three rank band stop filter.
3, according to the filter described in the claim 1, it is characterized in that: cavity is the base plate of an equivalence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97209391 CN2297806Y (en) | 1997-03-04 | 1997-03-04 | Band-pass and band-stop filter capable of raising band-pass filtering rejection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97209391 CN2297806Y (en) | 1997-03-04 | 1997-03-04 | Band-pass and band-stop filter capable of raising band-pass filtering rejection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2297806Y true CN2297806Y (en) | 1998-11-18 |
Family
ID=33928588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97209391 Expired - Fee Related CN2297806Y (en) | 1997-03-04 | 1997-03-04 | Band-pass and band-stop filter capable of raising band-pass filtering rejection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2297806Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032453A1 (en) * | 2016-08-18 | 2018-02-22 | 华为技术有限公司 | Filter |
-
1997
- 1997-03-04 CN CN 97209391 patent/CN2297806Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032453A1 (en) * | 2016-08-18 | 2018-02-22 | 华为技术有限公司 | Filter |
| CN109565098A (en) * | 2016-08-18 | 2019-04-02 | 华为技术有限公司 | A kind of filter |
| CN109565098B (en) * | 2016-08-18 | 2021-01-15 | 华为技术有限公司 | Filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |