CN102683780A - Multi-cavity filter taking coupled dual-gap cavity - Google Patents
Multi-cavity filter taking coupled dual-gap cavity Download PDFInfo
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- CN102683780A CN102683780A CN2011103613333A CN201110361333A CN102683780A CN 102683780 A CN102683780 A CN 102683780A CN 2011103613333 A CN2011103613333 A CN 2011103613333A CN 201110361333 A CN201110361333 A CN 201110361333A CN 102683780 A CN102683780 A CN 102683780A
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Abstract
The invention discloses a multi-cavity filter taking a coupled dual-gap cavity as a basic unit. The multi-cavity filter consists of two or more coupled dual-gap resonant cavity basic units enclosed by a cavity shell. The problems of narrow 1dB bandwidth and large size of the conventional coaxial cavity filter are solved; a wide 1dB bandwidth can be obtained by using a few cavity units; the provided metal cavity filter is high in power, wide in frequency band, small in size and light in weight; and the strength of coupling between every two cavities is optimal, and a high-power microwave filter meeting the bandwidth requirements of a mobile communication base station filter is designed.
Description
Technical field
The present invention relates to the art of microwave filters field, relating in particular to a kind of is the multi-cavity fluid filter of elementary cell with the coupled double spatia.
Background technology
The metallic cavity filter is because Insertion Loss is low in good, the compact conformation of its electromagnetic wave shielding, passband, volume is little and the power capacity advantages of higher, is the first-selected kind of mobile communication base station emission filter for a long time always.The cross-linked metallic cavity filter of many coaxial cavities is owing to having preferably filtering characteristic and being easy to advantage such as tuning and being widely used in the current GSM; But the Modern wireless communication base station is when constantly pursuing more high performance index; Also pursue more small size and more low-cost, and coaxial cavity metallic cavity filter in reduced volume, improve aspect such as 1dB bandwidth and have certain technical bottleneck.For this reason through investigation fully and analysis; Having proposed first to adopt with coupled double gap resonant cavity is the technical scheme of the multi-cavity fluid filter of elementary cell; Show after deliberation; At aspects such as 1dB bandwidth and filter volumes, compared clear superiority with two coupling coaxial cavity filters by the filter that single double gap chamber constitutes.
Summary of the invention
The objective of the invention is to overcome that existing coupling coaxial cavity filter 1dB bandwidth is narrower, volume is big and the cost problem of higher; Providing a kind of is the cavity body filter of elementary cell with coupled double gap resonant cavity; Realize bigger 1dB bandwidth with less cavity unit, a kind of high-power, broadband, small size are provided and the higher metallic cavity filter of power capacity.
With the coupled double spatia is the multi-cavity fluid filter of elementary cell; Comprise two or more coupled double gap resonant cavity; And two coaxial line ports of I/O; Each coupled double gap resonant cavity by up and down two fully the rectangular cavities of symmetry forms, have one deck to have the metallic walls of two above coupling slots up and down between two rectangular cavities, pass through between two rectangular cavities up and down the coupling slot of opening realize being coupled; Metal coupled wall through a perforate between adjacent two double gap resonant cavitys is realized coupling, the metal coupled wall be shaped as laterally zygomorphic two " T " font structures; Two coaxial line ports that are used for I/O have been separately positioned on the epicoele in first double gap chamber and the cavity of resorption in second double gap chamber, to reach the purpose of the mode of resonance that makes full use of four single chambeies.
Provided by the invention a kind of be the multi-cavity fluid filter of elementary cell with the coupled double spatia; The two or more coupled double gap resonant cavity 2 that is surrounded by a cavity shell 1 constitutes; Described coupled double gap resonant cavity 2 is two rectangular cavities of symmetry fully up and down; Separate by one deck coupled wall 5 between two rectangular cavities up and down, an inner wire 6 is arranged in each rectangular cavity, to realize the coupling of two rectangular cavities up and down; The position of symmetry has two or more first coupling slots 8 before and after said coupled wall 5 peripheries; Have second coupling slot 9 of two symmetries in coupled wall 5 centre positions; Laterally zygomorphic " T " font structure coupled wall 7 is installed, to realize the coupling between the adjacent double gap chamber between two adjacent coupled double gap resonant cavitys 2; The rectangular cavity of top-left position is the epicoele in first double gap chamber; The rectangular cavity of position, bottom right is the cavity of resorption in second double gap chamber; Input coaxial line port is arranged on the epicoele in first double gap chamber; The coaxial line port 4 of output is arranged on the cavity of resorption in second double gap chamber, to reach the purpose of the mode of resonance that makes full use of four single chambeies, and axle 3 in coaxial line has.
Said coupled wall 5 and " T " font structure coupled wall 7 are metallic walls.
Compared with prior art, the present invention has following beneficial effect:
1, compare with traditional coupling coaxial cavity filter, under the situation of same single chamber number, the 1dB bandwidth of double gap cavity filter obviously increases.For satisfying the requirement of certain bandwidth, the number of the required resonant element of double gap cavity filter is less, thereby reduced the volume of cavity body filter, reduced production cost.
2, the double gap cavity filter has unique double-decker; Compare with two coupling coaxial cavity filters of conventional monolayers structure; Satisfying under the situation of identical filtering characteristic, the cross-sectional area of double gap cavity filter can dwindle half the, and the through-put power capacity can double; This will have very remarkable advantages for some particular application.
3, adopt two coaxial cavity cross-couplings, can design that volume is less, the outer cross-couplings double gap cavity filter preferably that suppresses of band.
Description of drawings
Fig. 1 is the overall structure sketch map of multi-cavity fluid filter of the present invention.
Fig. 2 is the top plan view of multi-cavity fluid filter of the present invention.
Fig. 3 is the standing-wave ratio sketch map of the filtering characteristic Electromagnetic Simulation curve of multi-cavity fluid filter of the present invention.
Fig. 4 is the dB sketch map of filtering characteristic Electromagnetic Simulation curve of the multi-cavity fluid filter of multi-cavity fluid filter of the present invention.
Fig. 5 is the amplitude sketch map of filtering characteristic Electromagnetic Simulation curve of the multi-cavity fluid filter of multi-cavity fluid filter of the present invention.
Embodiment
With reference to Fig. 1,2; The present invention proposes with the coupled double spatia is the multi-cavity fluid filter of elementary cell; And through to the continuing to optimize of cavity body structure and each coupling aperture, designed one and can work in widely used communication system GSM-1800 transmit frequency band (1805～1880MHz) what require is the multi-cavity fluid filter of elementary cell with the coupled double spatia.Double-deck coupled double spatia was as elementary cell about the most successful part of this filter was to have adopted; And adopting " T " font coupled wall to realize the coupling between the adjacent chambers between two coupled double spatias; This double gap cavity configuration and coupled modes can reduce the resonant element number effectively, can obtain bigger transmission bandwidth again.
This filter by a cavity shell 1 surround about two coupled double spatias 2 constitute; Coupled double spatia 2 is symmetrical fully up and down rectangular coupled cavities; An inner wire 6 is arranged in each rectangular cavity; Separated by one deck coupled wall 5 between two rectangular cavities up and down, the position of symmetry has eight first coupling slots 8 before and after said coupled wall 5 peripheries, to realize the coupling of two rectangular cavities up and down; Have two laterally zygomorphic second coupling slots 9 in coupled wall 5 centre positions, laterally zygomorphic " T " font structure coupled wall 7 is installed, between two adjacent coupled double gap resonant cavitys 2 to realize the coupling between the adjacent double gap chamber; The rectangular cavity of top-left position is the epicoele in first double gap chamber; The rectangular cavity of position, bottom right is the cavity of resorption in second double gap chamber; Input coaxial line port 4 is arranged on the epicoele in first double gap chamber; The coaxial line port of output is arranged on the cavity of resorption in second double gap chamber, to reach the purpose of the mode of resonance that makes full use of four single chambeies, and axle 3 in coaxial line has.
More accurate analog result shows: the technical parameter of this invention can satisfy transmit frequency band 1805～1880MHz requirement of present widely used communication system GSM-1800; And cavity body structure is compared with the coupling coaxial cavity filter of existing single layer structure with size, reduces the resonant element number, has dwindled cavity cross-sectional area and volume, has reduced manufacturing cost.Fig. 3, Fig. 4 and Fig. 5 be use respectively that standing-wave ratio, amplitude, dB represent with the filtering characteristic curve of coupled double spatia as the multi-cavity fluid filter of elementary cell.
Claims (2)
1. one kind is the multi-cavity fluid filter of elementary cell with the coupled double spatia; It is characterized in that: described multi-cavity fluid filter is made up of two or more coupled double gap resonant cavity (2) that a cavity shell (1) surrounds; Described coupled double gap resonant cavity (2) is two rectangular cavities of symmetry fully up and down; An inner wire (6) is arranged in each rectangular cavity; Separated by one deck coupled wall (5) between two rectangular cavities up and down, the position of symmetry has two or more first coupling slots (8) before and after said coupled wall (5) periphery; Have second coupling slot (9) of two symmetries in coupled wall (5) centre position, laterally zygomorphic " T " font structure coupled wall (7) is installed between adjacent two coupled double gap resonant cavitys (2); The rectangular cavity of top-left position is the epicoele in first double gap chamber; The rectangular cavity of position, bottom right is the cavity of resorption in second double gap chamber; Input coaxial line port (4) is arranged on the epicoele in first double gap chamber; The coaxial line port of output is arranged on the cavity of resorption in second double gap chamber, and coaxial line has interior axle (3).
2. multi-cavity fluid filter according to claim 1 is characterized in that: said coupled wall (5) and " T " font structure coupled wall (7) are metallic walls.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103613333A CN102683780A (en) | 2011-11-15 | 2011-11-15 | Multi-cavity filter taking coupled dual-gap cavity |
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| CN2011103613333A CN102683780A (en) | 2011-11-15 | 2011-11-15 | Multi-cavity filter taking coupled dual-gap cavity |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545588A (en) * | 2013-10-24 | 2014-01-29 | 江苏贝孚德通讯科技股份有限公司 | Half-wavelength shared-cavity metal resonator |
| CN104865449A (en) * | 2015-05-25 | 2015-08-26 | 电子科技大学 | Dielectric substrate measurement apparatus based on multi-resonant waveguide substrate integration vibration cavity method and method thereof |
| CN106785275A (en) * | 2017-02-17 | 2017-05-31 | 京信通信系统（中国）有限公司 | Double-deck chamber combiner and its public port device |
| CN106819189A (en) * | 2017-02-21 | 2017-06-13 | 贵州大学 | A kind of intelligent black tea fermentation equipment |
| CN112821021A (en) * | 2021-01-22 | 2021-05-18 | 华沣通信科技有限公司 | Sheet welding type small filter and manufacturing method thereof |
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| CN101604783A (en) * | 2009-05-12 | 2009-12-16 | 成都赛纳赛德科技有限公司 | Compact type microwave cavity |
| US20100013578A1 (en) * | 2008-07-21 | 2010-01-21 | Mohammad Memarian | Method of operation and construction of dual-mode filters, quad-mode filters, dual band filters, and diplexer/multiplexer devices using full or half cut dielectric resonators |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2002054527A2 (en) * | 2000-12-29 | 2002-07-11 | Allgon Ab | A filter including coaxial cavity resonators |
| US20020180559A1 (en) * | 2001-05-31 | 2002-12-05 | Sei-Joo Jang | Dielectric resonator loaded metal cavity filter |
| CN201084809Y (en) * | 2007-09-07 | 2008-07-09 | 西安达威通信设备有限公司 | A Ku wave band bypass coupling wave-guide filter |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103545588A (en) * | 2013-10-24 | 2014-01-29 | 江苏贝孚德通讯科技股份有限公司 | Half-wavelength shared-cavity metal resonator |
| CN103545588B (en) * | 2013-10-24 | 2015-04-29 | 江苏贝孚德通讯科技股份有限公司 | Half-wavelength shared-cavity metal resonator |
| CN104865449A (en) * | 2015-05-25 | 2015-08-26 | 电子科技大学 | Dielectric substrate measurement apparatus based on multi-resonant waveguide substrate integration vibration cavity method and method thereof |
| CN104865449B (en) * | 2015-05-25 | 2017-08-25 | 电子科技大学 | Dielectric substrate measurement apparatus and method based on the integrated cell method of shaking of waveguide multi resonant substrate |
| CN106785275A (en) * | 2017-02-17 | 2017-05-31 | 京信通信系统（中国）有限公司 | Double-deck chamber combiner and its public port device |
| WO2018149236A1 (en) * | 2017-02-17 | 2018-08-23 | 京信通信系统（中国）有限公司 | Double-layer cavity combiner and public port device thereof |
| CN106819189A (en) * | 2017-02-21 | 2017-06-13 | 贵州大学 | A kind of intelligent black tea fermentation equipment |
| CN112821021A (en) * | 2021-01-22 | 2021-05-18 | 华沣通信科技有限公司 | Sheet welding type small filter and manufacturing method thereof |
| CN112821021B (en) * | 2021-01-22 | 2022-05-17 | 华沣通信科技有限公司 | Sheet welding type small filter and manufacturing method thereof |
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Application publication date: 20120919 |