CN104319444B - Double-frequency cavity filter compatible to working frequencies of GPS and Beidou - Google Patents
Double-frequency cavity filter compatible to working frequencies of GPS and Beidou Download PDFInfo
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- CN104319444B CN104319444B CN201410606432.7A CN201410606432A CN104319444B CN 104319444 B CN104319444 B CN 104319444B CN 201410606432 A CN201410606432 A CN 201410606432A CN 104319444 B CN104319444 B CN 104319444B
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- 238000006880 cross-coupling reaction Methods 0.000 claims abstract description 6
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Abstract
The invention discloses a structure of a double-frequency cavity filter compatible to working frequencies of GPS and Beidou. The double-frequency cavity filter is provided with a cavity (1), resonators (2), coupling blocks (3), tuning threaded rods (4), cross coupling windows (5) among the resonators, a covering plate (6) and a radio-frequency connector (7), and is characterized in that passages among the resonators (2) are of an all-pass structure, meanwhile, the coupling blocks (3) are arranged to reinforce coupling among the resonators, and therefore a broadband filtering performance is achieved. The double-frequency cavity filter is applied to a GPS and Beidou double-mode navigation receiving system, is used for receiving the front segment of system radio frequency in the process of navigation, receives GPS and Beidou signals, restrains useless signals out of band, and has the advantages of being small in insertion loss and high in out-of-band rejection.
Description
Technical field
The invention belongs to wave filter technology field, and in particular to a kind of double frequency cavity body filter, GPS and the Big Dipper are applicable to
Satellite navigation system.
Background technology
As domestic Beidou satellite navigation system builds increasingly perfect, Beidou navigation application is more and more.Big-dipper satellite is led
Boat system is the global positioning satellite and communication system that China voluntarily develops, and can all-weather, round-the-clock be each in the world
Class user provides high accuracy, highly reliable positioning, navigation, time service service, and has short message communication capacity.
Big Dipper area navigation reception system can support multimode multi-frequency, can be with compatible with GPS aeronautical satellite, so as to realize various defending
Star navigation system navigation feature.In multimode area navigation reception system, radio-frequency front-end needs various frequencies such as compatible with GPS, the Big Dipper
The wave filter of rate realizes the synthesis of satellite-signal and the suppression to garbage signal.
Filtering device belongs to the front-end filtering device of telecommunication equipment, and its basic function is filtered outside useful band
Signal, as cavity body filter has the characteristics of insertion loss is little, Out-of-band rejection is high, is widely used filtering in radio-frequency front-end
Device so that radio-frequency front-end is obtained in that preferable noise coefficient, improves the signal to noise ratio of whole reception system.
But, current cavity body filter is typically only to have preferably filtering effect to a kind of navigation system of frequency
Really, for the synthesis of compatible satellite-signal of two kinds of different frequencies and poor to the inhibition of garbage signal, it is impossible to meet
It is actually needed.
The content of the invention
For the above Improvement requirement of prior art, the invention provides a kind of compatible GPS, the chamber of Big Dipper operating frequency
Fluid filter, its can the simultaneously compatible Big Dipper and GPS satellite navigation system, realize two kinds of different frequency satellite-signals synthesis and
Suppression to garbage signal, accuracy rate are high, and effect is good.
The concrete technical scheme adopted for achieving the above object by the present invention is as follows：
A kind of compatible GPS, the cavity body filter of Big Dipper operating frequency, it is characterised in that including filtering body, resonance
Device, coupling block, tuning screw, cover plate and radio frequency connector, wherein, the filtering body has internal cavity, the resonance
Device and coupling block are housed wherein and are covered by the cover plate, and the passage between multiple resonators is all-pass structure, each humorous
Shake and the coupling block is set between device, to strengthen the coupling between each resonator, the tuning screw is arranged on filtering
On device body and above resonator, the radio frequency connector is arranged on the filtering body.
As the improvement of the present invention, cross-couplings window between the resonator, is provided with.
Used as the improvement of the present invention, the coupling block is square structure.
Used as the improvement of the present invention, the resonator is disc structure, and center is provided with circular hole, is easy to be matched with tuning screw
To be tuned.
The compatible GPS of wave filter of the present invention, the cavity body filter of Big Dipper operating frequency, which uses Chebyshev type broadband
Structure, realizes about 30% relative bandwidth, it is achieved thereby that the wide band cavity filter of the compatible Big Dipper and GPS frequency ranges.
In general, by the contemplated above technical scheme of the present invention compared with prior art, with following beneficial effect
Really：Wave filter its operating frequency range of the present invention can be 1258～1580MHz, cover Big Dipper B3：1268.52±
10.23MHz with GPS L1：1575.42 ± 1.023MHz, can be good at realizing the double frequency cavity filter of compatible with GPS, Big Dipper signal
Ripple device, with preferable engineering application value.
Description of the drawings
Fig. 1 is the main structure diagram according to the wave filter constructed by the embodiment of the present invention；
Fig. 2 is the side structure schematic view according to the wave filter constructed by the embodiment of the present invention；
Fig. 3 is the dimensional structure diagram according to the wave filter constructed by the embodiment of the present invention；
Fig. 4 is the structural representation of the resonator according to the wave filter constructed by the embodiment of the present invention；
Fig. 5 is the electric test figure according to the wave filter constructed by the embodiment of the present invention；
In all of the figs, identical reference represents same technical characteristic, specifically：1 is cavity；2 is resonator；
3 is coupling block；4 is tuning screw；5 is cross-couplings window between resonator；6 is cover plate；7 is radio frequency connector.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and
It is not used in the restriction present invention.As long as additionally, technical characteristic involved in invention described below each embodiment
Do not constitute conflict each other can just be mutually combined.
The double frequency cavity body filter of the compatible with GPS and the Big Dipper of the embodiment of the present invention include cavity 1, resonator 2, coupling block 3,
Cross-couplings window 5, cover plate 6 and radio frequency connector 7 between tuning screw 4, resonator.
Filtering body 1 has internal cavity, and resonator 2, coupling block 3 and cross-couplings window 5 are housed wherein and passed through
Cover plate 6 is covered.Radio frequency connector 7 is arranged on outside the filtering body 1.Passage between multiple resonators 2 is all-pass
Structure, each resonator 2 are provided with coupling block 3 each other, to strengthen the coupling between each resonator.Each resonator 2 is surrounded
Center position be provided with coupling window 5.
Preferably, 2 tetrad of resonator rectangle is surrounded, the center of each rectangle is provided with a coupling window 5.
Resonator 2 preferably uses circular pan-like structure, and the passage between resonator 2 is all-pass structure, is made between resonator
Broadband couple device is realized with square coupling block 3, to strengthen the coupling between resonator, so as to realize wideband filtered performance.
Product index debugging is realized by the coupling screws between 4 resonator 2 of tuning screw above resonator 2.
Double frequency cavity body filter is cascaded by coupling block 3 by the resonator 2 in cavity 1, so as to realize wideband filtered
Device structure, product are adjusted to electric property by tuning screw 4, made the standing wave of product, are penetrated with interior Insertion Loss, Out-of-band rejection etc.
Frequency index meets demand.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, not to
The present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc. are limited, all should be included
Within protection scope of the present invention.
Claims (2)
1. a kind of compatible GPS, the cavity body filter of Big Dipper operating frequency, it is characterised in that including filtering body (1), humorous
Shake device (2), coupling block (3), tuning screw (4), cover plate (6) and radio frequency connector (7), wherein, filtering body (1) tool
There are internal cavity, the resonator (2) and coupling block (3) accommodating wherein and by the cover plate (6) capping, multiple resonance
Passage between device (2) is all-pass structure, and the center position that the resonator (2) surrounds is provided with cross-couplings window (5), each humorous
The device (2) that shakes arranges the coupling block (3) each other, and the coupling block (3) is square structure, to strengthen between each resonator
Coupling, the tuning screw (4) be arranged on filtering body (1) and be located at resonator above, the radio frequency connector (7)
It is arranged on the filtering body (1).
2. a kind of compatible GPS according to claim 1, the cavity body filter of Big Dipper operating frequency, it is characterised in that institute
It is disc structure to state resonator (2), and center is provided with circular hole, is easy to match to be tuned with tuning screw (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410606432.7A CN104319444B (en) | 2014-10-31 | 2014-10-31 | Double-frequency cavity filter compatible to working frequencies of GPS and Beidou |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410606432.7A CN104319444B (en) | 2014-10-31 | 2014-10-31 | Double-frequency cavity filter compatible to working frequencies of GPS and Beidou |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104319444A CN104319444A (en) | 2015-01-28 |
| CN104319444B true CN104319444B (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410606432.7A Active CN104319444B (en) | 2014-10-31 | 2014-10-31 | Double-frequency cavity filter compatible to working frequencies of GPS and Beidou |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113691325B (en) * | 2021-10-27 | 2021-12-28 | 天津讯联科技有限公司 | Satellite-borne short message cavity filter thermal vacuum experiment test system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6392506B2 (en) * | 1999-12-06 | 2002-05-21 | Kathrein, Inc. | Receive/transmit multiple cavity filter having single input/output cavity |
| CN202695684U (en) * | 2012-07-16 | 2013-01-23 | 苏州市大富通信技术有限公司 | Cavity filter |
| CN202839912U (en) * | 2012-09-21 | 2013-03-27 | 武汉凡谷电子技术股份有限公司 | Filter coupling structure |
| CN103490128A (en) * | 2011-05-19 | 2014-01-01 | Ace技术株式会社 | Multi mode filter for realizing wide band using capacitive coupling / inductive coupling and capable of tuning coupling value |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267220B (en) * | 2007-03-12 | 2011-07-27 | 京信通信系统（中国）有限公司 | Dual-frequency multiplexer |
| CN201332130Y (en) * | 2009-01-13 | 2009-10-21 | 南京广顺网络通信设备有限公司 | DCS1800/PHS double-frequency mixer |
| CN201436696U (en) * | 2009-05-14 | 2010-04-07 | 南京广顺网络通信设备有限公司 | A CDMA+GSM+3G/DCS1800 dual frequency combiner |
| CN202339971U (en) * | 2012-01-05 | 2012-07-18 | 东莞洲亮通讯科技有限公司 | A multi-band integrated cross-coupled combiner filter |
| CN203521566U (en) * | 2013-09-23 | 2014-04-02 | 南京广顺网络通信设备有限公司 | A dual-frequency high intermodulation waterproof combiner |
| CN203826528U (en) * | 2014-04-17 | 2014-09-10 | 南京广顺网络通信设备有限公司 | 640-1850 MHz /WCDMA/LTE triple frequency combiner |
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2014
- 2014-10-31 CN CN201410606432.7A patent/CN104319444B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6392506B2 (en) * | 1999-12-06 | 2002-05-21 | Kathrein, Inc. | Receive/transmit multiple cavity filter having single input/output cavity |
| CN103490128A (en) * | 2011-05-19 | 2014-01-01 | Ace技术株式会社 | Multi mode filter for realizing wide band using capacitive coupling / inductive coupling and capable of tuning coupling value |
| CN202695684U (en) * | 2012-07-16 | 2013-01-23 | 苏州市大富通信技术有限公司 | Cavity filter |
| CN202839912U (en) * | 2012-09-21 | 2013-03-27 | 武汉凡谷电子技术股份有限公司 | Filter coupling structure |
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| CN104319444A (en) | 2015-01-28 |
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