CN101521306B - Flat transmission multi-mode resonant cavity - Google Patents
Flat transmission multi-mode resonant cavity Download PDFInfo
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- CN101521306B CN101521306B CN 200910058884 CN200910058884A CN101521306B CN 101521306 B CN101521306 B CN 101521306B CN 200910058884 CN200910058884 CN 200910058884 CN 200910058884 A CN200910058884 A CN 200910058884A CN 101521306 B CN101521306 B CN 101521306B
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Abstract
The invention discloses a flat transmission multi-mode resonant cavity, which comprises at least one cavity and a coupling structure capable of motivating two or more working modes, wherein when an electric field metallic object is arranged in the cavity, an upper cover plate of the cavity right above the electric field metallic object is also provided with a microwave absorber, and a microwave absorbing material is arranged on the surface or the inside of the microwave absorber. When the electric field metallic object is not arranged in the cavity, the microwave absorber is arranged at an electric field centralization position in certain working mode in the cavity. By improving the prior art, the flat transmission multi-mode resonant cavity overcomes the defects in the prior art so that the fluctuation in band of the multi-mode resonant cavity is flattened. The flat transmission multi-mode resonant cavity belongs to a filter technique, and is mainly applied to electronic systems with various microwave bands, in particular to the fields of radar, communication, guided missile control and guide, and the like.
Description
Technical field
The present invention relates to a kind of multimode cavity, specifically, relate to a kind of flat transmission multi-mode resonant cavity.
Background technology
Utilize multimode cavity, can constitute multi-mode filter.Because constituting the mode of operation of the resonant cavity of multi-mode filter is not the minimum basic mode of resonance frequency in this resonant cavity in general; The volume of the volume ratio basic mode resonant cavity of multimode cavity is big, and the Q value of this multimode cavity is higher than the Q value in the basic mode chamber of same resonance frequency.The multimode cavity that multi-mode filter adopts; In same resonant cavity, have a plurality of mode of operations to exist simultaneously, these patterns intercouple to produce to produce than the cross-couplings between the different single mode cavitys of the general filter that is made up of the single mode resonant cavity zero point and more can realize easily zero point.The multi-mode filter that is made up of multimode cavity produces zero point owing to realizing easily that multimode is coupled in the same resonant cavity; Satisfying under the condition of same technical indicator, the number of the needed cavity of multi-mode filter is than there not being cross-linked common single mode filter to lack.More than two factors make the Insertion Loss of multi-mode filter much littler than the Insertion Loss of single mode filter, and the volume of filter is also reduced.
The patent application that number of patent application is 200710050788.7, name is called " a kind of compact multimode cavity " discloses a kind of multimode cavity that is used to constitute the multimode resonance filter; This compact multimode cavity mainly can encourage cavity, coupled structure and the electric field metallic object of a plurality of mode of operations to form by one, and the electric field metallic object only is connected with cavity inner wall in one direction.This multimode cavity can reduce the volume of resonant cavity, has solved parasitism band between filter, duplexer, the multiplexer topic of corresponding well, has good frequency selective characteristic simultaneously.
But there are a plurality of mode of operations in above-mentioned multimode cavity and compact multimode cavity.These mode of operations are different with extraneous stiffness of coupling.In order to realize that very precipitous band suppresses outward, a little less than other mode of operation of coupling ratio in one of them mode of operation and the external world, loaded Q is higher.Because constituting the actual metal material of resonant cavity is non-perfact conductor, the mode of operation of this high Q value is big to the loss of microwave to other mode of operation of loss ratio of microwave; When such multimode cavity constitutes band pass filter; The transmission coefficient of filter particularly at the edge of passband near transmission zero, " pit " will occur in passband; Cause the passband fluctuation of filter transmission coefficient bigger, the result of use of filter is brought very big influence.
Summary of the invention
The purpose of this invention is to provide a kind of flat transmission multi-mode resonant cavity, overcome deficiency of the prior art.
To achieve these goals, the technical scheme of the present invention's employing is:
A kind of flat transmission multi-mode resonant cavity comprises cavity and coupled structure that at least one can encourage a plurality of mode of operations, it is characterized in that said cavity is provided with microwave-absorbing body.
Said microwave-absorbing body is arranged on the upper cover plate of cavity.
Said inside cavity electric field strength maximum is provided with the electric field metal column, and said microwave-absorbing body is arranged on the cavity upper cover plate directly over the electric field metal column.
Said microwave-absorbing body passes the upper cover plate of cavity from outside to inside.
Said microwave-absorbing body is provided with the lossy microwave layer of being processed by microwave absorbing material, and said lossy microwave layer is arranged at the surperficial or inner of microwave-absorbing body.
Also be provided with tuning screw on the said cavity upper cover plate.
Principle of the present invention: the mode of operation in the multimode cavity is owing to different with the stiffness of coupling in the external world, and is different to the decay of microwave.The pattern strong with external world's coupling is little to the decay of microwave.And it is big with the weak pattern of external world coupling to the decay of microwave.Through a microwave-absorbing body is set on the cavity upper cover plate; Can increase those and the extraneous decay of strong mode of operation that be coupled selectively to microwave; Make all mode of operations have identical or close decay, thereby make the interior transmission of band of filter smooth microwave.
Described cavity is a column construction, and the above and below is a parallel plane; Electric field metallic object and vertical connection of cavity lower plane inwall.For easy to process, the cavity level cross-sectionn can be designed to rectangle.Can certainly be circle, ellipse etc.
Said microwave-absorbing body be arranged at certain mode of operation electric field in the resonant cavity concentrate the place directly over upper cover plate on.The surface of microwave-absorbing body is provided with microwave absorbing material, and this microwave absorbing material can add in any form.The adding of microwave absorbing material has realized that the passband fluctuation in the passband is tending towards smooth.
The cavity upper cover plate can also be provided with tuning screw, simultaneously, also microwave-absorbing body can be set on tuning screw.
The present invention is simple and practical, can solve the bigger problem of passband fluctuation in the prior art well.
Description of drawings
Fig. 1 is for the prior art constructions sketch map.
Fig. 2 is a kind of structural representation of the present invention.
Fig. 3 is an another kind of structural representation of the present invention.
The name that label is corresponding in the accompanying drawing is called: 1-cavity, 2-electric field metallic object, 3-microwave-absorbing body, 4-lossy microwave layer, 5-tuning screw.
Embodiment
As shown in Figure 2, a kind of flat transmission multi-mode resonant cavity comprises the cavity 1 and a coupled structure that can encourage two mode of operations, and the electric field metal column 2 that is arranged at cavity 1 inside, and wherein, said cavity 1 upper cover plate is provided with microwave-absorbing body 3.
This microwave-absorbing body 3 is a screw-like, be arranged at electric field metallic object 2 directly over, and pass cavity 1 upper cover plate from outside to inside.The surface or the inside of microwave-absorbing body 3 are provided with lossy microwave layer 4, and lossy microwave layer 4 is made by nonmetal consumable material, is used to increase the loss of the stronger pattern of coupling, makes whole cavity 1 inner passband fluctuation smooth.
As shown in Figure 3, embodiment 2 is do not have electric field metal column 2 in the cavity 1 of said smooth multimode cavity with the difference of embodiment 1, and other structures are all identical.
Claims (4)
1. flat transmission multi-mode resonant cavity; Comprise at least one cavity that can encourage a plurality of mode of operations (1) and coupled structure; It is characterized in that; Said cavity (1) is provided with microwave-absorbing body (3), and said microwave-absorbing body (3) is provided with the lossy microwave layer of being processed by microwave absorbing material (4), and said lossy microwave layer (4) is arranged at the surperficial or inner of microwave-absorbing body (3); Said microwave-absorbing body (3) be arranged at certain mode of operation electric field in the resonant cavity concentrate the place directly over upper cover plate on; Perhaps said cavity (1) internal electric intensity maximum is provided with electric field metal column (2), and said microwave-absorbing body (3) is arranged on cavity (1) upper cover plate directly over the electric field metal column (2).
2. flat transmission multi-mode resonant cavity according to claim 1 is characterized in that, said microwave-absorbing body (3) is arranged on the upper cover plate of cavity (1).
3. flat transmission multi-mode resonant cavity according to claim 1 and 2 is characterized in that, said microwave-absorbing body (3) passes the upper cover plate of cavity (1) from outside to inside.
4. flat transmission multi-mode resonant cavity according to claim 1 and 2 is characterized in that, also is provided with tuning screw (5) on said cavity (1) upper cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200910058884 CN101521306B (en) | 2009-04-09 | 2009-04-09 | Flat transmission multi-mode resonant cavity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910058884 CN101521306B (en) | 2009-04-09 | 2009-04-09 | Flat transmission multi-mode resonant cavity |
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| CN101521306A CN101521306A (en) | 2009-09-02 |
| CN101521306B true CN101521306B (en) | 2012-10-03 |
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| CN 200910058884 Active CN101521306B (en) | 2009-04-09 | 2009-04-09 | Flat transmission multi-mode resonant cavity |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698287A (en) * | 2013-12-06 | 2015-06-10 | 中国科学院电子学研究所 | Magnetic-coupling cold testing device for dumbbell-shaped resonant cavity |
| CN104091985B (en) * | 2014-06-19 | 2016-06-22 | 华南理工大学 | A kind of broadband filter adopting single chamber four mould cavity resonator |
| CN106099287A (en) * | 2016-06-22 | 2016-11-09 | 安徽天兵电子科技有限公司 | A kind of high-isolation airproof microwave components |
| CN106099293A (en) * | 2016-06-22 | 2016-11-09 | 安徽天兵电子科技有限公司 | A kind of high-isolation microwave components |
| CN110632371B (en) * | 2019-09-30 | 2022-05-31 | 深圳供电局有限公司 | Charged non-contact detection device and method for object surface |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0336675A1 (en) * | 1988-04-05 | 1989-10-11 | Com Dev Ltd. | Dielectric image-resonator multiplexer |
| US6297715B1 (en) * | 1999-03-27 | 2001-10-02 | Space Systems/Loral, Inc. | General response dual-mode, dielectric resonator loaded cavity filter |
| CN201038288Y (en) * | 2007-04-04 | 2008-03-19 | 成都赛纳赛德科技有限公司 | Capacitor loaded compact type waveguide filter |
| CN201266666Y (en) * | 2008-08-19 | 2009-07-01 | 成都赛纳赛德科技有限公司 | Flat transmission multimode resonator |
-
2009
- 2009-04-09 CN CN 200910058884 patent/CN101521306B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0336675A1 (en) * | 1988-04-05 | 1989-10-11 | Com Dev Ltd. | Dielectric image-resonator multiplexer |
| US6297715B1 (en) * | 1999-03-27 | 2001-10-02 | Space Systems/Loral, Inc. | General response dual-mode, dielectric resonator loaded cavity filter |
| CN201038288Y (en) * | 2007-04-04 | 2008-03-19 | 成都赛纳赛德科技有限公司 | Capacitor loaded compact type waveguide filter |
| CN201266666Y (en) * | 2008-08-19 | 2009-07-01 | 成都赛纳赛德科技有限公司 | Flat transmission multimode resonator |
Non-Patent Citations (1)
| Title |
|---|
| JP昭63-221702A 1988.09.14 |
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Effective date of registration: 20201204 Address after: 215228, No. two, No. 1188, West Ring Road, Shengze Town, Wujiang District, Jiangsu, Suzhou Patentee after: Suzhou Shengze science and Technology Pioneer Park Development Co.,Ltd. Address before: 610041 A-54 box, 6 Yongfeng Road, hi tech Zone, Sichuan, Chengdu Patentee before: CHENGDU SINOSCITE TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20201222 Address after: 274600 Lizhuang Industrial Park, Hongchuan Town, juancheng County, Heze City, Shandong Province Patentee after: Juancheng Fengzhan Wood Industry Co.,Ltd. Address before: 215228 No. 1188 west two ring road, Shengze Town, Wujiang District, Suzhou, Jiangsu. Patentee before: Suzhou Shengze science and Technology Pioneer Park Development Co.,Ltd. |