CN201163655Y - Coupling band-pass filter with adjustable capacitance - Google Patents
Coupling band-pass filter with adjustable capacitance Download PDFInfo
- Publication number
- CN201163655Y CN201163655Y CNU200820065875XU CN200820065875U CN201163655Y CN 201163655 Y CN201163655 Y CN 201163655Y CN U200820065875X U CNU200820065875X U CN U200820065875XU CN 200820065875 U CN200820065875 U CN 200820065875U CN 201163655 Y CN201163655 Y CN 201163655Y
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Abstract
The utility model relates to an adjustable capacitive coupling bandpass filter, mainly consisting of a resonant cavity body, a cover board, a resonant rod and an adjusting screw rod, wherein, a magnetic coupling or a capacitive cross coupling is arranged inside the resonant cavity body. The adjustable capacitive coupling bandpass filter is characterized in that an adjustable magnetic cross coupling is arranged in the resonant cavity body with the capacitive cross coupling. The filter has simple assembly, is easy to guarantee the coupling size, has low requirement on materials and manufacture, reduces the design difficulty and the production difficulty, reduces the environmental pollution, can directly adopt the die-casting method in the mass production because the requirement on the resonant cavity body is reduced, and has lower production cost.
Description
Technical field
The utility model relates to the microwave communication field, relates in particular to adjustable electric capacitive strap bandpass filter.
Background technology
Existing filter (duplexer) is a kind of for steady job frequency and frequency range design, owing to require more and more higher to isolation between the frequency range and the outer suppression characteristic of band, when reality realizes filter (duplexer) frequency response characteristic, the normal broad sense Chebyshev's model of different cross-couplings form structures that adopts comes equivalence to realize, introduces capacitive character of different nature or inductive cross-couplings according to the needs of different occasions like this between non-adjacent chamber.
Simultaneously, along with the continuous development of microwave communication system with utilize limited frequency spectrum resources better, the normal communication product that adopts very near frequency range to form a series at interval in the new communication system, in order to make that product has better generality, hope filter (duplexer) wherein has frequency range and can move characteristic, can move on to another working frequency range from a working frequency range, perhaps can regulate the characteristic of bandwidth of operation.And the capacitive character cross coupling structure form in the existing filter (duplexer) can not satisfy tunable characteristic, makes it need carry out structural adjustment again when mobile frequency band or change bandwidth.
The design is a kind of design that can regulate the cross-couplings amplitude continuously for frequency displacement, variable bandwidth filter (duplexer) design.Traditional band pass filter (duplexer) normally is made up of main components such as resonant cavity, cover plate, resonant rod, adjusting screw(rod) and coupled outside parts.Wherein, the magnetic coupling mode realizes by the window between cavity, and traditional capacitive character cross-couplings is the field coupled between cavity, capacitive character cross coupling structure form is normal adopt an installation be on the resonant cavity wall and with the metal coupling bar or the coupling piece (as Fig. 1 to Fig. 2) of resonant cavity wall insulation, because its physical structure relative fixed, its version and coupling amplitude can not be adjusted, but this structure filter variable to frequency range or the frequency frequency displacement has considerable restraint, is difficult in the wider frequency to move under the certain situation of bandwidth.
Summary of the invention
The purpose of this utility model is in order to solve the deficiency that the above-mentioned background technology exists, the adjustable electric capacitive strap bandpass filter that a kind of structure is more optimized is proposed, make its specification requirement that can reduce resonant cavity, reduce product design and debugging difficulty, thereby reduce production costs.
The utility model adopts following technical scheme for achieving the above object: a kind of adjustable electric capacitive strap bandpass filter, mainly form by resonant cavity, cover plate, resonant rod, adjusting screw(rod), between resonant cavity, be provided with magnetic coupling or capacitive character cross-couplings, it is characterized in that between the cross-linked resonant cavity of desired capacitive character, but increase the adjustable magnetic cross-couplings again.
But described adjustable magnetic cross-couplings is to increase a window between the coupled resonance cavity, on the cover plate corresponding with this window the coupling screw rod is set.
Described cavity and lid surface are silver-plated, copper facing or nickel plating.
Magnetic coupling between described resonant cavity is arranged on the window between resonant cavity, capacitive character cross-couplings between described resonant cavity adopt an installation be on the resonant cavity wall and with the metal coupling bar or the coupling piece of resonant cavity wall insulation.
The adjustable electric capacitive coupling that the utility model proposed is adjustable inductive coupled in one traditional of capacitive couplings version next door adding, total coupling amplitude between cavity is that capacitive character powers up perceptual sum at this moment, when inductive coupled reinforcement, its total coupling amplitude weakens accordingly, thereby can regulate total cross-couplings amplitude by regulating perceptual cross-couplings amplitude like this.
Design of the present utility model is to utilize electric coupling and magnetic coupling incompatibility, and the principle of cancelling out each other realizes.Being better than magnetic-coupled same cross-couplings point in electric coupling increases magnetic coupling, makes whole coupling change to the direction that electric coupling weakens, and then electric coupling integral body weakens, produces zero point relatively away from passband; Otherwise electric coupling strengthens, produces zero point near passband.
The utility model assembling is simple, and coupling is taken measurements and guaranteed easily, to material and making require low, reduce design difficulty and production difficulty, alleviate environmental pollution, simultaneously owing to the requirement to resonant cavity reduces, can directly adopt pressure casting method production during batch process, production cost is lower.
Description of drawings
Fig. 1 is traditional three chamber band pass filter cross coupling structure figure.
Fig. 2 is traditional four chamber band pass filter cross coupling structure figure.
Fig. 3 is traditional four chamber band pass filter covering plate structure vertical views.
Fig. 4 is the utility model three chamber band pass filter cross coupling structure figure.
Fig. 5 is the utility model four chamber band pass filter cross coupling structure figure.
Fig. 6 is the utility model four chamber band pass filter covering plate structure vertical views.
Embodiment
Referring to Fig. 4 to Fig. 6, present embodiment mainly is made up of main components such as resonant cavity 1, cover plate 2, resonant rod 3, adjusting screw(rod) 4, input, outputs, be provided with magnetic coupling or capacitive character cross-couplings 1 of resonant cavity, 1 of the cross-linked resonant cavity of desired capacitive character, but increase the adjustable magnetic cross-couplings again, but described adjustable magnetic cross-couplings is to increase a window 51 of coupled resonance cavity, on the cover plate corresponding with this window 5 adjustable condenser sex-intergrade coupling screw rod 6 is set.
Wherein, resonant rod 3 is fixed by bolts on silver-plated resonant cavity 1 inner surface, and cover plate 2 also can be selected electroplating surface or not electroplate adjustable condenser sex-intergrade coupling screw rod 6 and other adjusting screw(rod) 4 the same being installed on the cover plate 2 according to the character of himself material.Resonant cavity 1 surface can be selected to electroplate or do not electroplate according to the definition of index.Cavity of the present utility model and lid surface can be silver-plated, copper facing or nickel plating.
Magnetic coupling between described resonant cavity is arranged on the window 7 between resonant cavity, capacitive character cross-couplings between described resonant cavity adopt an installation be on the resonant cavity wall and with the metal coupling bar 8 or the coupling piece of resonant cavity wall insulation.
Claims (4)
1, a kind of adjustable electric capacitive strap bandpass filter, mainly form by resonant cavity, cover plate, resonant rod, adjusting screw(rod), between resonant cavity, be provided with magnetic coupling or capacitive character cross-couplings, it is characterized in that between the cross-linked resonant cavity of desired capacitive character, but increase the adjustable magnetic cross-couplings again.
2, adjustable electric capacitive strap bandpass filter according to claim 1, but it is characterized in that described adjustable magnetic cross-couplings for increase a window between the coupled resonance cavity, is provided with the coupling screw rod on the cover plate corresponding with this window.
3, adjustable electric capacitive strap bandpass filter according to claim 1 is characterized in that cavity and lid surface are silver-plated, copper facing or nickel plating.
4, according to the described adjustable electric capacitive of arbitrary claim strap bandpass filter in the claim 1 to 3, it is characterized in that magnetic coupling between described resonant cavity is arranged on the window between resonant cavity, the capacitive character cross-couplings between described resonant cavity adopt an installation be on the resonant cavity wall and with the metal coupling bar or the coupling piece of resonant cavity wall insulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820065875XU CN201163655Y (en) | 2008-03-06 | 2008-03-06 | Coupling band-pass filter with adjustable capacitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820065875XU CN201163655Y (en) | 2008-03-06 | 2008-03-06 | Coupling band-pass filter with adjustable capacitance |
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| Publication Number | Publication Date |
|---|---|
| CN201163655Y true CN201163655Y (en) | 2008-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU200820065875XU Expired - Fee Related CN201163655Y (en) | 2008-03-06 | 2008-03-06 | Coupling band-pass filter with adjustable capacitance |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719580A (en) * | 2010-01-07 | 2010-06-02 | 东莞市苏普尔电子科技有限公司 | Method for controlling multi-band signal combiner, and tri-band combiner structure |
| CN101950842A (en) * | 2010-08-18 | 2011-01-19 | 奥维通信股份有限公司 | Manufacturing method of device with cavities |
| CN102185170A (en) * | 2011-02-28 | 2011-09-14 | 西安空间无线电技术研究所 | High-power corner cut filter with square cavity |
| CN102361117A (en) * | 2011-09-29 | 2012-02-22 | 武汉虹信通信技术有限责任公司 | Capacitive cross coupling flying bar and coaxial cavity resonator thereof |
| CN101527380B (en) * | 2009-04-22 | 2012-10-24 | 京信通信系统（中国）有限公司 | Cavity radio frequency apparatus with capacitive cross coupling device |
| CN103296360A (en) * | 2012-03-01 | 2013-09-11 | 深圳光启创新技术有限公司 | Cavity dielectric filter |
| CN103441317A (en) * | 2013-09-05 | 2013-12-11 | 宁波泰立电子科技有限公司 | Cavity filter with rotation adjustable loop |
| CN103718375A (en) * | 2011-08-05 | 2014-04-09 | 株式会社Kmw | Radio frequency filter employing notch structure |
| CN104319433A (en) * | 2014-10-13 | 2015-01-28 | 世达普(苏州)通信设备有限公司 | Waveguide duplexer with positive and negative convertible cross coupling |
| CN108336460A (en) * | 2018-01-24 | 2018-07-27 | 苏州市矩光达通讯技术有限公司 | A kind of microminiature 5G filters |
| CN109687073A (en) * | 2019-03-01 | 2019-04-26 | 江苏德是和通信科技有限公司 | A kind of star-like duplexer of DTV adjacent channel |
| WO2019213916A1 (en) * | 2018-05-10 | 2019-11-14 | 深圳市大富科技股份有限公司 | Cavity filter and communication radio frequency device |
| CN111952700A (en) * | 2019-05-14 | 2020-11-17 | 罗森伯格技术（昆山）有限公司 | Cross coupling filter |
| CN112599944A (en) * | 2020-11-30 | 2021-04-02 | 湖南迈克森伟电子科技有限公司 | Miniaturized high-suppression adjustable cavity filter |
| WO2022218113A1 (en) * | 2021-04-16 | 2022-10-20 | 京信射频技术(广州)有限公司 | Metal filter, filtering loop module, and method for adjusting amount of coupling |
-
2008
- 2008-03-06 CN CNU200820065875XU patent/CN201163655Y/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527380B (en) * | 2009-04-22 | 2012-10-24 | 京信通信系统（中国）有限公司 | Cavity radio frequency apparatus with capacitive cross coupling device |
| CN101719580A (en) * | 2010-01-07 | 2010-06-02 | 东莞市苏普尔电子科技有限公司 | Method for controlling multi-band signal combiner, and tri-band combiner structure |
| CN101950842A (en) * | 2010-08-18 | 2011-01-19 | 奥维通信股份有限公司 | Manufacturing method of device with cavities |
| CN102185170A (en) * | 2011-02-28 | 2011-09-14 | 西安空间无线电技术研究所 | High-power corner cut filter with square cavity |
| CN103718375A (en) * | 2011-08-05 | 2014-04-09 | 株式会社Kmw | Radio frequency filter employing notch structure |
| US10298195B2 (en) | 2011-08-05 | 2019-05-21 | Kmw Inc. | Radio frequency filter employing notch structure |
| CN102361117A (en) * | 2011-09-29 | 2012-02-22 | 武汉虹信通信技术有限责任公司 | Capacitive cross coupling flying bar and coaxial cavity resonator thereof |
| CN103296360B (en) * | 2012-03-01 | 2017-08-25 | 深圳光启创新技术有限公司 | A kind of cavity medium filter |
| CN103296360A (en) * | 2012-03-01 | 2013-09-11 | 深圳光启创新技术有限公司 | Cavity dielectric filter |
| CN103441317B (en) * | 2013-09-05 | 2015-07-15 | 宁波泰立电子科技有限公司 | Cavity filter with rotation adjustable loop |
| CN103441317A (en) * | 2013-09-05 | 2013-12-11 | 宁波泰立电子科技有限公司 | Cavity filter with rotation adjustable loop |
| CN104319433A (en) * | 2014-10-13 | 2015-01-28 | 世达普(苏州)通信设备有限公司 | Waveguide duplexer with positive and negative convertible cross coupling |
| CN108336460A (en) * | 2018-01-24 | 2018-07-27 | 苏州市矩光达通讯技术有限公司 | A kind of microminiature 5G filters |
| WO2019213916A1 (en) * | 2018-05-10 | 2019-11-14 | 深圳市大富科技股份有限公司 | Cavity filter and communication radio frequency device |
| CN109687073A (en) * | 2019-03-01 | 2019-04-26 | 江苏德是和通信科技有限公司 | A kind of star-like duplexer of DTV adjacent channel |
| CN109687073B (en) * | 2019-03-01 | 2024-04-12 | 江苏德是和通信科技有限公司 | Digital television adjacent channel star-shaped duplexer |
| CN111952700A (en) * | 2019-05-14 | 2020-11-17 | 罗森伯格技术（昆山）有限公司 | Cross coupling filter |
| CN111952700B (en) * | 2019-05-14 | 2022-05-17 | 罗森伯格技术有限公司 | Cross coupling filter |
| CN112599944A (en) * | 2020-11-30 | 2021-04-02 | 湖南迈克森伟电子科技有限公司 | Miniaturized high-suppression adjustable cavity filter |
| WO2022218113A1 (en) * | 2021-04-16 | 2022-10-20 | 京信射频技术(广州)有限公司 | Metal filter, filtering loop module, and method for adjusting amount of coupling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081210 Termination date: 20160306 |
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| CF01 | Termination of patent right due to non-payment of annual fee |