CN2731877Y - Route synthetizer for GSM/CDMA co-space feedback system base station - Google Patents
Route synthetizer for GSM/CDMA co-space feedback system base station Download PDFInfo
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- CN2731877Y CN2731877Y CNU2004200887784U CN200420088778U CN2731877Y CN 2731877 Y CN2731877 Y CN 2731877Y CN U2004200887784 U CNU2004200887784 U CN U2004200887784U CN 200420088778 U CN200420088778 U CN 200420088778U CN 2731877 Y CN2731877 Y CN 2731877Y
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- 238000006880 cross-coupling reaction Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 abstract description 6
- 230000037431 insertion Effects 0.000 abstract description 6
- 238000002955 isolation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000003407 synthetizing effect Effects 0.000 abstract 5
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 20
- 238000010168 coupling process Methods 0.000 description 20
- 238000005859 coupling reaction Methods 0.000 description 20
- 238000010295 mobile communication Methods 0.000 description 6
- 230000005764 inhibitory process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
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Abstract
The utility model discloses a route synthetizer for a GSM/CDMA co-space feedback system base station, comprising a box body and a cover plate. The box body is provided with a synthetizing route port, one synthetizing route port corresponds to a dividing route port of GSM, and one synthetizing route port corresponds to a dividing route port of CDMA. A GSM path filter is provided between the dividing route port and the synthetizing route port which correspond to the GSM in the box body. A CDMA path filter is provided between the dividing route port and the synthetizing route port which correspond to the CDMA. The GSM path filter and the CDMA path filter comprise some coaxial cavity body resonators. The adjacent cavity bodies are coupled through windows. Compared with the prior art, the utility model utilizes the method of moving a harmonic oscillation rod and solves the problem that the window in the design of a broad band route synthetizer is limited. The utility model has the following outstanding features as follows : 1. insertion loss is small ; 2. isolation degree between the GSM/CDMA paths is high; 3. the utility model is apt to tuning and is suitable for full scale production.
Description
[technical field]
The utility model relates to the mobile communication equipment field, relates in particular to the mobile communication base station mixer that is used for the GSM/CDMA co-space feedback system.
[technical background]
The development of mobile communication, the existing attitude that multiple system occurred and deposited, the communication network that has multiple system in each operator.At present, all there are GSM and cdma mobile communication network (being called G net and C net respectively) in several big mobile communication carrier of China, and usually, these two kinds of networks are to build respectively in same iron tower by different antenna-feedback systems.But can unite two into one fully with regard to antenna-feedback system, promptly only use a cover antenna-feedback system, increase the GSM/CDMA mixer, the signal that so not only can finish CDMA and GSM net covers, and can reduce pylon requirement, minimizing difficulty of construction, saving cost of equipment and operating expenses, its comprehensive benefit is obvious.
Little with the mixer insertion loss that coaxial cavity is realized, temperature stability is good, and the outer inhibition degree height of band is that the ideal of GSM/CDMA co-space feedback system base station mixer is selected.Yet, since each passage of mixer cover fully its receive and transmit frequency band (the G net is from 824MHz to 880MHz; The C net is from 909MHz to 960MHz), the passband broad, the coupling between coaxial cavity is very strong, and this just needs to strengthen the size of coupling window.Yet in order to improve two interchannel isolations, the filter of each passage will have higher band degree of inhibition outward in the mixer.In order to reduce Insertion Loss, often adopt the cross-couplings method, make and produce transmission zero in the stopband.Like this, there is coupling between some of them cavity and a plurality of cavity.Because the size of cavity is limited, so each coupling window size is limited.The conventional method that increases the coaxial cavity coupling has two kinds, and first kind is to strengthen coupling window; Second kind is the degree of depth that increases coupling window adjusted screw rod.Yet in this case, the most of coupling window in the mixer reaches capacity, but can't meet the requirements of the degree of coupling, so first method can not satisfy the design's requirement.Second method generally only is used for the fine setting that is coupled between cavity, if be used for increasing the coupling between cavity on a large scale, certainly will cause the screw rod that inserts in the cavity long, and coupling is too responsive to screw rod, makes mixer be difficult to tuning and last locking.In addition, the long interior Insertion Loss of passband of mixer that also can make of screw rod that inserts in the cavity becomes big.
Therefore, mixer of the prior art can't satisfy simultaneously under the demanding situation of passband width and be convenient to index requests such as tuning, that the insertion loss is low.
[utility model content]
The utility model technical issues that need to address are to solve in the prior art the limited problem of coupling window in the cross-couplings coaxial cavity mixer of broadband, a kind of GSM/CDMA of being used for co-space feedback system is provided, is convenient to tuning, as to have low insertion loss broad passband mobile communication base station mixer.
The technical solution of the utility model is: GSM/CDMA co-space feedback system mixer, comprise box body and cover plate, and on described box body, there is one to close road port, a branch road port and a branch road port corresponding to CDMA corresponding to GSM; In box body corresponding to the branch road port of GSM with close a GSM path filter is arranged between the road port; Corresponding to the branch road port of CDMA with close CDMA path filter between the road port.
Described GSM path filter, CDMA path filter all are coaxial cavity filters.
Described coaxial cavity filter is to be made of some coaxial cavity resonators, is coupled by window between the adjacent cavity.
Described GSM path filter is made up of seven coaxial cavity resonators, and has adopted two cross-couplings transmission zeros; The CDMA path filter is made up of seven coaxial cavity resonators, and has adopted three cross-couplings transmission zeros.
Relative its adjacent resonant rod in center, part resonant rod off-resonance chamber is subjected to displacement in the described coaxial cavity filter.
Compared with prior art, the utility model has following outstanding feature: 1, insert loss little (less than 0.7dB); 2, GSM/CDMA interchannel isolation height (greater than 90dB); 3, be easy to tuningly, be suitable for producing in enormous quantities.
[description of drawings]
Fig. 1 is an electric theory diagram of the present utility model;
Fig. 2 is a structural representation of the present utility model.
Fig. 3 is the box body cut-away view in the utility model.
[embodiment]
Below in conjunction with accompanying drawing the technical solution of the utility model is further described.
Of the present utility model electric theory diagram as shown in Figure 1.Mixer is three port organizations, is made up of GSM port, CDMA port and antenna port.Between GSM and antenna port, it is linked to each other, between CDMA and antenna port, have another path filter to link to each other by a path filter.
Fig. 2 is a structural representation of the present utility model, and Fig. 3 is the box body cut-away view in the utility model.As can be seen from Figures 2 and 3, the utility model is made of box body 4, cover plate 5.On described box body, there is one to close road port 1, one branch road port 2 and a branch road port 3 corresponding to CDMA corresponding to GSM.From closing road port, be divided into two branch lines with transmission line, every branch line is connected with the coaxial cavity resonator of a filter, and each coaxial cavity is adjacent cavity at least by window and is coupled.Described filter is a coaxial cavity filter, and each filter and a branch road port join, and constitutes one-to-two or the two-in-one line structure that closes with this.
GSM path filter passband in the utility model has covered the frequency band that transmits and receives of its passage, frequency range 824MHz-880MHz; CDMA path filter passband has covered the frequency band that transmits and receives of its passage, frequency range 909MHz-960MHz.
GSM and CDMA two paths of signals are imported, are exported by port 2 and port 3 respectively.Microwave closes the road signal by closing road port 1 input, output.Box body inside is provided with partition, and cavity is divided into two parts, is respectively GSM filter and CDMA filter.Two-way filter all is a coaxial cavity filter, is to be made of some coaxial cavity resonators, is coupled by window between the adjacent cavity.The GSM path filter has adopted seven coaxial cavities and two cross-couplings, and cross-couplings is respectively by being present in coupling bar realization between cavity 15 and 17, the cavity 18 and 20.The CDMA path filter has adopted seven coaxial cavities and three cross-couplings, and cross-couplings is realized by the coupling window that is present between cavity 8 and 10, cavity 11 and 13, the cavity 11 and 14 respectively.Using cross-linked purpose in cavity is in order to produce transmission zero, to make two frequency ranges of GSM and CDMA reach better isolation, making the inhibition of two paths of signals reach best.
In the GSM path filter, be coupled as main coupling between the cavity 15 and 16, between 16 and 17, between 17 and 18, between 18 and 19, between 19 and 20, between 20 and 21; Main coupling window has all reached maximum limit of size.In the CDMA path filter, be coupled as main coupling between the cavity 8 and 9, between 9 and 10, between 10 and 11, between 11 and 12, between 12 and 13, between 13 and 14; Main coupling window has all reached maximum limit of size.For coupling is met design requirement, cavity 8,9, resonant rod and cavity and decentraction in 10,11,13,14,15,17,18,19,21.Cross is the center of resonant cavity among Fig. 3, and the little initial point actual position that is resonant rod, as can be seen from the figure, a segment distance has been moved towards its adjacent resonant rod in the center in some resonant rod off-resonance chamber.The distance of resonant rod skew can be determined by theory analysis and numerical computations: at first the circuit model synthesis in theory of filter application provides two coupled systemes numerical value between resonant rod, then, by Numerical Calculation of Electromagnetic Fields determine in the cavity two resonant rods when the diverse location two of correspondence than low order eigen mode frequency f
1And f
2, the position at resonant rod place is appropriate position when being obtained coupling coefficient and equated with the result of circuit synthesis theory by them.
As shown in Figure 2, on the cover board 5 be provided with adjusting screw(rod) 6 corresponding to each the described circular cylindrical cavity in the box body, stretch in the groove on resonant rod 7 tops in the described circular cylindrical cavity its lower end.Described adjusting screw(rod) is matched with the cover plate screw by screw and nut and constitutes, adjusting screw(rod) trimmer amount, with adapt to accurately tuning requirement of mixer, regulate finish after fixing and locking at once.
Since input and output can reverse configuration in the different circuit of microwave frequency band, so this mixer also can be used as splitter, promptly, carry out shunt through this device by former output port 1 input, the two-way shunting sign is by former input port 2,3 outputs, so just become splitter.
Claims (5)
1, a kind of GSM/CDMA co-space feedback system base station mixer is characterized in that, comprises box body and cover plate, has one to close road port on described box body, a branch road port and the branch road port corresponding to CDMA corresponding to GSM; In box body corresponding to the branch road port of GSM with close a GSM path filter is arranged between the road port; Corresponding to the branch road port of CDMA with close CDMA path filter between the road port.
2, the described GSM/CDMA co-space feedback system of claim 1 base station mixer is characterized in that, described GSM path filter, CDMA path filter all are coaxial cavity filters.
3, the described GSM/CDMA co-space feedback system of claim 2 base station mixer is characterized in that, described coaxial cavity filter is to be made of some coaxial cavity resonators, is coupled by window between the adjacent cavity.
4, the described GSM/CDMA co-space feedback system of claim 2 base station mixer is characterized in that, described GSM path filter is made up of seven coaxial cavity resonators, and has adopted two cross-couplings transmission zeros; The CDMA path filter is made up of seven coaxial cavity resonators, and has adopted three cross-couplings transmission zeros.
5, claim 3 or 4 described GSM/CDMA co-space feedback system base station mixers is characterized in that, relative its adjacent resonant rod in center, part resonant rod off-resonance chamber is subjected to displacement in the described coaxial cavity filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200887784U CN2731877Y (en) | 2004-09-22 | 2004-09-22 | Route synthetizer for GSM/CDMA co-space feedback system base station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200887784U CN2731877Y (en) | 2004-09-22 | 2004-09-22 | Route synthetizer for GSM/CDMA co-space feedback system base station |
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| CN2731877Y true CN2731877Y (en) | 2005-10-05 |
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| CNU2004200887784U Expired - Fee Related CN2731877Y (en) | 2004-09-22 | 2004-09-22 | Route synthetizer for GSM/CDMA co-space feedback system base station |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008119284A1 (en) * | 2007-03-30 | 2008-10-09 | Huawei Technologies Co., Ltd. | Shared radio frequency front end, base station and method for sharing radio frequency front end |
| CN101335905B (en) * | 2007-06-26 | 2011-04-06 | 京信通信系统（中国）有限公司 | GSM/DCS/WCDMA tri-frequency combiner |
| CN101345931B (en) * | 2008-08-05 | 2012-04-04 | 华为技术有限公司 | Antenna feeder sharing apparatus, system and method |
| CN101557025B (en) * | 2009-05-20 | 2012-07-18 | 南京赛格微电子科技有限公司 | Compact GSM/CDMA shared combiner for transceiving |
| CN102881975A (en) * | 2011-07-14 | 2013-01-16 | 凯镭思通讯设备（上海）有限公司 | Filter realizing coupled transmission zeros |
| CN102945993A (en) * | 2012-12-04 | 2013-02-27 | 成都赛纳赛德科技有限公司 | Telescopic adjustable filter |
| CN106684514A (en) * | 2016-11-16 | 2017-05-17 | 南通大学 | Differential dual-coaxial cavity band-pass filter |
| CN113036363A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Communication equipment and filter |
| CN113726362A (en) * | 2021-07-23 | 2021-11-30 | 上海闻泰电子科技有限公司 | Branching unit, control method thereof and communication system |
-
2004
- 2004-09-22 CN CNU2004200887784U patent/CN2731877Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008119284A1 (en) * | 2007-03-30 | 2008-10-09 | Huawei Technologies Co., Ltd. | Shared radio frequency front end, base station and method for sharing radio frequency front end |
| CN101335905B (en) * | 2007-06-26 | 2011-04-06 | 京信通信系统（中国）有限公司 | GSM/DCS/WCDMA tri-frequency combiner |
| CN101345931B (en) * | 2008-08-05 | 2012-04-04 | 华为技术有限公司 | Antenna feeder sharing apparatus, system and method |
| CN101557025B (en) * | 2009-05-20 | 2012-07-18 | 南京赛格微电子科技有限公司 | Compact GSM/CDMA shared combiner for transceiving |
| CN102881975A (en) * | 2011-07-14 | 2013-01-16 | 凯镭思通讯设备（上海）有限公司 | Filter realizing coupled transmission zeros |
| CN102881975B (en) * | 2011-07-14 | 2015-04-08 | 凯镭思通讯设备（上海）有限公司 | Filter realizing coupled transmission zeros |
| CN102945993A (en) * | 2012-12-04 | 2013-02-27 | 成都赛纳赛德科技有限公司 | Telescopic adjustable filter |
| CN106684514A (en) * | 2016-11-16 | 2017-05-17 | 南通大学 | Differential dual-coaxial cavity band-pass filter |
| CN106684514B (en) * | 2016-11-16 | 2019-05-28 | 南通大学 | A kind of double coaxial cavity bandpass filters of difference |
| CN113036363A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Communication equipment and filter |
| CN113726362A (en) * | 2021-07-23 | 2021-11-30 | 上海闻泰电子科技有限公司 | Branching unit, control method thereof and communication system |
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| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |