CN201877545U - Microwave filter with multiple transmission zeros and no cross coupling fly rod - Google Patents
Microwave filter with multiple transmission zeros and no cross coupling fly rod Download PDFInfo
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- CN201877545U CN201877545U CN2010205646718U CN201020564671U CN201877545U CN 201877545 U CN201877545 U CN 201877545U CN 2010205646718 U CN2010205646718 U CN 2010205646718U CN 201020564671 U CN201020564671 U CN 201020564671U CN 201877545 U CN201877545 U CN 201877545U
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- microwave filter
- transmission zeros
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Abstract
The utility model discloses a microwave filter with multiple transmission zeros and no cross coupling fly rod. The microwave filter is cascaded by two filtering modules; and each filtering module consists of conventional asymmetrical filtering modules, namely H Phi coupled cavities and Hz coupled-cavities respectively. In the microwave filter provided by the utility model, a cross coupling fly rod mounted on a cover plate and a corresponding supporting material in the conventional design are omitted, non-adjacent resonant cavities are coupled, and symmetrical or asymmetrical multiple transmission zeros are generated. The microwave filter provided by the utility model has a simple structure, is easy to process and assemble, correspondingly reduces the manufacturing cost, and simultaneously improves the reliability of the product.
Description
Technical field
The utility model relates to a kind of filter, and especially a kind of do not have a microwave filter with many transmission zeros that cross-couplings flies bar.
Background technology
Adopting all cavitys is the technical scheme commonly used of wireless base system median filter design now in conplane design all, and the characteristics of this design are that mechanical structure is simple, are convenient to processing and assembling; It adopts non-conterminous resonant cavity coupling, and cavity body filter can be that stopband produces symmetry or asymmetrical transmission zero in the both sides of passband, and the band that can reach expectation suppresses index request outward.Usually in this kind design, adopt cross-couplings window or cross-couplings to fly bar and produce the different transmission zeros that require.But this type of cross-couplings needs extra parts, flies bar as metal, backing material, and this is with the limits product debugging efficiency and reduce product reliability, also will bring higher processing charges etc. simultaneously.
The utility model content
The purpose of this utility model provides a kind of microwave filter, can not use cross-couplings to fly under the situation of bar, produces symmetry or asymmetrical transmission zero.
For achieving the above object, by the following technical solutions:
A kind of do not have a microwave filter with many transmission zeros that cross-couplings flies bar, formed by two filtration module cascades, and each filtration module is conventional asymmetric filtration module, is respectively H φ coupling cavity and Hz coupling cavity.
Described H φ coupling cavity is the metal coaxial cavity.
Described Hz coupling cavity is a TE01 mould medium cavity.
Microwave filter described in the utility model, cancel the cross-couplings that is installed in the conventional design on the cover plate and flown bar and corresponding backing material, adopt non-conterminous resonant cavity coupling, can produce symmetry or asymmetrical many transmission zeros, simple in structure, be easy to processing and assembling, reduced production cost accordingly, improved reliability of products simultaneously.
Description of drawings
According to embodiment and accompanying drawing the utility model is described in further detail below.
Fig. 1 is the perspective view of 8 grades of filters of microwave filter described in the utility model;
Fig. 2 is the plane graph of the physical structure of the described 8 grades of filters realization of embodiment.
Among the figure:
1,2,3,4, medium cavity; 5,6,7,8, metal coaxial cavity; 9, radio frequency input adapter; 10, radio frequency out splice going splice; 11, coupling window.
Embodiment
As shown in Figure 1,8 grades of Filter Structures schematic diagrames of microwave filter described in the utility model have been provided. Not a valid link., the plane graph of the physical structure of its realization as shown in Figure 2, cavity 1 and 4 is Hz field coupling, and the Hz field is coupled, the direction of "+" expression field is for from inside to outside wearing out the direction of paper, and " zero " expression field is for entering the direction of paper from outside to inside; Cavity 5 and 8 is H φ coupling, sword head direction indication magnetic direction.The coupled magnetic field of cavity 1 to 4 can be synthetic by TE01 mould medium cavity, the coupled magnetic field of cavity 5 to 8 can be synthetic by the metal coaxial cavity, the medium cavity is to form by putting a dielectric material in the cavity, and the metal coaxial cavity then is to form coaxial concussion by putting a metal material in the cavity.
H φ coupling cavity is used to produce positive cross-couplings, can produce transmission zero at the high frequency stopband of passband.
The Hz coupling cavity is used to produce required positive and negative cross-couplings, can produce transmission zero at the low frequency stopband of passband.
Microwave filter described in the utility model, the cross-couplings of having cancelled the cover plate in the conventional design and being installed on the cover plate flies bar and corresponding backing material, adopts non-conterminous resonant cavity coupling, can produce symmetry or asymmetrical many transmission zeros, simple in structure, be easy to processing and assembling.
Claims (3)
1. one kind is not had the microwave filter with many transmission zeros that cross-couplings flies bar, is formed by two filtration module cascades, it is characterized in that, each filtration module is conventional asymmetric filtration module, is respectively H φ coupling cavity and Hz coupling cavity.
2. no cross-couplings according to claim 1 flies the microwave filter with many transmission zeros of bar, it is characterized in that, described H φ coupling cavity is the metal coaxial cavity.
3. no cross-couplings according to claim 1 flies the microwave filter with many transmission zeros of bar, it is characterized in that, described Hz coupling cavity is a TE01 mould medium cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205646718U CN201877545U (en) | 2010-10-18 | 2010-10-18 | Microwave filter with multiple transmission zeros and no cross coupling fly rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205646718U CN201877545U (en) | 2010-10-18 | 2010-10-18 | Microwave filter with multiple transmission zeros and no cross coupling fly rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201877545U true CN201877545U (en) | 2011-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205646718U Expired - Lifetime CN201877545U (en) | 2010-10-18 | 2010-10-18 | Microwave filter with multiple transmission zeros and no cross coupling fly rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201877545U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013538A (en) * | 2010-10-18 | 2011-04-13 | 江苏贝孚德通讯科技股份有限公司 | Cross coupling flying rod-free microwave filter with multiple transmission zeros |
| CN103000975A (en) * | 2012-11-23 | 2013-03-27 | 广东通宇通讯股份有限公司 | Cavity filter |
| CN113036342A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Communication system and filter thereof |
-
2010
- 2010-10-18 CN CN2010205646718U patent/CN201877545U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013538A (en) * | 2010-10-18 | 2011-04-13 | 江苏贝孚德通讯科技股份有限公司 | Cross coupling flying rod-free microwave filter with multiple transmission zeros |
| CN103000975A (en) * | 2012-11-23 | 2013-03-27 | 广东通宇通讯股份有限公司 | Cavity filter |
| CN103000975B (en) * | 2012-11-23 | 2015-08-05 | 广东通宇通讯股份有限公司 | Cavity body filter |
| CN113036342A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Communication system and filter thereof |
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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: Cross coupling flying rod-free microwave filter with multiple transmission zeros Effective date of registration: 20130730 Granted publication date: 20110622 Pledgee: Agricultural Bank of China Limited by Share Ltd Wuxi science and Technology Branch Pledgor: Pivotone Communication Technologies, Inc. Registration number: 2013990000524 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20150824 Granted publication date: 20110622 Pledgee: Agricultural Bank of China Limited by Share Ltd Wuxi science and Technology Branch Pledgor: Pivotone Communication Technologies, Inc. Registration number: 2013990000524 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110622 |
|
| CX01 | Expiry of patent term |