CN102881975B - Filter realizing coupled transmission zeros - Google Patents
Filter realizing coupled transmission zeros Download PDFInfo
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- CN102881975B CN102881975B CN201110197563.0A CN201110197563A CN102881975B CN 102881975 B CN102881975 B CN 102881975B CN 201110197563 A CN201110197563 A CN 201110197563A CN 102881975 B CN102881975 B CN 102881975B
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- coupling column
- resonator
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- coupling
- cavity
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Abstract
The invention relates to a filter realizing coupled transmission zeros, which comprises a cavity and two connectors, wherein the two connectors are an input connector and an output connector and arranged at the two ends of the cavity respectively; the filter further comprises a first coupling column, a second coupling column, a first resonator, a second resonator and a low-pass element; the input connector is connected with the first coupling column and the second coupling column through the low-pass element; the first coupling column is connected with the first resonator in a coupling manner; and the second coupling column is connected with the second resonator in a coupling manner. Compared with the prior art, the filter has the advantages that the zeros can be distributed more conveniently.
Description
Technical field
The present invention relates to a kind of filter, especially relate to a kind of filter realizing coupled transfer zero point.
Background technology
In modern microwave millimeter-wave systems, filter is one of vitals, and select for channel filtering, the quality of its performance directly affects the quality of whole communication system.Filter with low insertion loss, high degree of suppression, low cost and rapid Design etc. become the requirement of filter key technology, and conventional filter and method for designing are difficult to the needs adapting to modern development.General Chebyshev filters has sharp-pointed frequency selectivity, again can the group delay of flat filter, can also form multiband filter, therefore be widely used in various microwave and millimeter wave system.
Traditional circuit realiration can adopt the topological coupled structure of N and N+2 (N>=1) filter coupled zero point, but under some fixing claimed structures, at f0
*produce parasitic couplings in (1.2 ~ 1.3) frequency multiplication, controlling consumption of filter cannot be reached, wherein f0=passband central frequency.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of filter realizing coupled transfer zero point is provided.
Object of the present invention can be achieved through the following technical solutions:
A kind of filter realizing coupled transfer zero point, comprise cavity, joint, described joint is provided with two, for input adapter and out splice going splice, be located at the two ends of cavity respectively, it is characterized in that, also comprise the first coupling column be located in cavity, the second coupling column, the first resonator, the second resonator and low pass element, described input adapter is connected with the first coupling column, the second coupling column respectively by low pass original paper, the first described coupling column is connected with the first resonator, and the second described coupling column is connected with the second resonator.
Described joint is sub-miniature A connector.
Described low pass element is inductance element.
Compared with prior art, the present invention has the following advantages:
1) source and the second chamber is utilized to produce inductive coupled, the position that can arrange more easily zero point;
2) this kind of coupled structure can not produce parasitic couplings in the scope of f0*2, and the intensity that port is coupled with the second chamber can be calculated by the method for S11 Reflection delay.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, a kind of filter realizing coupled transfer zero point, comprise cavity 1, joint, described joint is provided with two, for input adapter 6 and out splice going splice, be located at the two ends of cavity 1 respectively, also comprise the first coupling column 2, second coupling column 3, first resonator 4, second resonator 5 and the low pass element 7 be located in cavity, described input adapter 6 is connected with the first coupling column 2, second coupling column 3 respectively by low pass original paper 7, the first described coupling column 2 and the first resonator 4 are of coupled connections, and the second described coupling column 3 and the second resonator 5 are of coupled connections.Described joint is sub-miniature A connector.Described low pass element 7 is inductance element.
Claims (3)
1. one kind realizes the filter at coupled transfer zero point, comprise cavity, joint, described joint is provided with two, for input adapter and out splice going splice, be located at the two ends of cavity respectively, it is characterized in that, also comprise the first coupling column be located in cavity, the second coupling column, the first resonator, the second resonator and low pass element, described input adapter is connected with the first coupling column, the second coupling column respectively by low pass original paper, the first described coupling column is connected with the first resonator, and the second described coupling column is connected with the second resonator.
2. a kind of filter realizing coupled transfer zero point according to claim 1, is characterized in that, described joint is sub-miniature A connector.
3. a kind of filter realizing coupled transfer zero point according to claim 1, is characterized in that, described low pass element is inductance element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110197563.0A CN102881975B (en) | 2011-07-14 | 2011-07-14 | Filter realizing coupled transmission zeros |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110197563.0A CN102881975B (en) | 2011-07-14 | 2011-07-14 | Filter realizing coupled transmission zeros |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102881975A CN102881975A (en) | 2013-01-16 |
| CN102881975B true CN102881975B (en) | 2015-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110197563.0A Expired - Fee Related CN102881975B (en) | 2011-07-14 | 2011-07-14 | Filter realizing coupled transmission zeros |
Country Status (1)
| Country | Link |
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| CN (1) | CN102881975B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108475836B (en) * | 2015-12-24 | 2021-02-26 | 华为技术有限公司 | Filter and wireless network equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2718801Y (en) * | 2004-04-25 | 2005-08-17 | 摩比天线技术（深圳）有限公司 | Double channel signal combiner |
| CN2731877Y (en) * | 2004-09-22 | 2005-10-05 | 摩比天线技术（深圳）有限公司 | Route synthetizer for GSM/CDMA co-space feedback system base station |
| CN201063353Y (en) * | 2006-12-28 | 2008-05-21 | 武汉凡谷电子技术股份有限公司 | Cavity filter with naught cavity |
| CN201893431U (en) * | 2010-03-12 | 2011-07-06 | 安徽省大富机电技术有限公司 | Cavity body filter and coupling structure thereof |
| CN202167596U (en) * | 2011-07-14 | 2012-03-14 | 凯镭思通讯设备（上海）有限公司 | Filter capable of achieving coupling transmission zeros |
-
2011
- 2011-07-14 CN CN201110197563.0A patent/CN102881975B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2718801Y (en) * | 2004-04-25 | 2005-08-17 | 摩比天线技术（深圳）有限公司 | Double channel signal combiner |
| CN2731877Y (en) * | 2004-09-22 | 2005-10-05 | 摩比天线技术（深圳）有限公司 | Route synthetizer for GSM/CDMA co-space feedback system base station |
| CN201063353Y (en) * | 2006-12-28 | 2008-05-21 | 武汉凡谷电子技术股份有限公司 | Cavity filter with naught cavity |
| CN201893431U (en) * | 2010-03-12 | 2011-07-06 | 安徽省大富机电技术有限公司 | Cavity body filter and coupling structure thereof |
| CN202167596U (en) * | 2011-07-14 | 2012-03-14 | 凯镭思通讯设备（上海）有限公司 | Filter capable of achieving coupling transmission zeros |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102881975A (en) | 2013-01-16 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| 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: 20150408 Termination date: 20190714 |