CN201117772Y - Clutter suppressed receiving/transmitting switching pre-selected filtering combining filter - Google Patents
Clutter suppressed receiving/transmitting switching pre-selected filtering combining filter Download PDFInfo
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- CN201117772Y CN201117772Y CNU2007200447078U CN200720044707U CN201117772Y CN 201117772 Y CN201117772 Y CN 201117772Y CN U2007200447078 U CNU2007200447078 U CN U2007200447078U CN 200720044707 U CN200720044707 U CN 200720044707U CN 201117772 Y CN201117772 Y CN 201117772Y
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Abstract
A clutter-inhibitable receiving duplex preselecting filtering combined filter includes a body, a cover plate, inner conductors of resonance cavities, resonance frequency adjusting bolts, adjusting bolts for the coupling intensity between cavities, an input interface and an output interface. The utility model integrally consists of a duplex filter and a preselecting filter. The body of the duplex filter is provided with is provided with a low-pass filtering resonance cavity parallel with the receiving ends of the parallel rectangle cavities; the parallel rectangle cavities are respectively arranged at two ends of the body of the duplex filter; low-pass inner conductors are arranged in the cavities; one ends of the low-pass conductors are connected with the inner conductors of the resonance cavities of the receiving ends; the other ends are connected with the input and the output interfaces of the receiving ends. The duplex filter is provided with low-pass filter which can better restrain the interference and scattering as well as radiating coming from the outside of the working frequency band. The utility model has excellent performances, high reliability and broad usage; a series of multi-cavity duplex preselecting filtering combined filters can be designed.
Description
Technical field
The utility model relates to a kind of clutter and suppresses transmission duplex preliminary election filtering junction filter, is applicable to the base station equipment of radio communication field radio signal transmission.
Background technology
In all kinds of Wireless Telecom Equipments of modern times, for example GSM/CDMA/PCS/DCS mobile communication high-power wireless base station, Digital Clustering high-power wireless base station etc. all need a kind of can by high-power, have high selectivity energy, loss as far as possible little, have that clutter suppresses, the duplexer technology of amphiorentation coupling, and based on the various critical components of this art designs.But, with regard to present technical merit, can pass through powerful duplexer for one, at first, just there are many technological difficulties in the filter and the duplexer of drain performance that wants to obtain simultaneously and high selection performance, because a pair of more formidable contradiction on low-loss and the high selectivity.Existing TEM film multicavity filter has two kinds of versions commonly used: the multicavity filter of distributed couplings and the adjustable multicavity filter of centralized coupling.The former generally in the main body that conventional cast processes the broach shape insert a plurality of inner wires, be formed centrally a plurality of rectangular cavities in inner wire being, screw in the resonance frequency adjustment screw relative from the cavity opposite side with inner wire, the filter two ends have end plate, and input and output connector joins with filter two ends cavity respectively.This Filter Design is ripe with manufacturing, it is also less to insert loss, the problem that exists is the Fixed Design that is coupled as between the adjacent resonators, passband width is non-adjustable, be unfavorable for the design and the manufacturing of many kinds series of products, and when passband width required constriction, the distributed couplings district extended thereupon, increased the volume of filter.The latter mostly is that rotary-cut processes a plurality of cylindrical cavities (or rectangular cavity) in the bulk metal piece, also has inner wire and resonance frequency adjustment screw, has intercommunicating pore between the adjacent resonators, in connection place, regulates the coupling amount between the resonant cavity by the extrapolation screw rod.The major advantage of this filter is that after product was made, performances such as ripple, input and output standing-wave ratio fully be adjusted to and reach satisfactory result in can and being with passband width.The problem that exists is that screw device is relatively more clumsy, and the insertion loss is also bigger, and under the more situation of resonant cavity requirement, difficulty of processing increases, and technological debugging work is quite loaded down with trivial details, complicated, time-consuming.Since the last century the nineties, in land mobile communication system and digital clustering communication system, generally adopt the adjustable multicavity filter of a kind of centralized coupling (Motorola Inc., Ericsson, Korea S KMW Inc. all adopt this filter product), in the main body of bulk metal piece, process a plurality of rectangles or cylindrical coaxial cavity that honeycomb fashion is arranged, cylindrical inner conductor is installed in the chamber, must from body portion from upper cover plate screw in the resonance frequency adjustment screw corresponding with inner wire, increased the difficulty of Installation and Debugging.The filter of this structure mainly relies on the cross section that enlarges coaxial cavity, improve the precision of machining and plating measures such as (for example electroplates) is carried out on the surface reduced its loss, improve its optionally approach mainly be reasonable arrangement between the chamber, and increase the separate space coupled structure and realize the separate space coupling.Its shortcoming mainly is a high material consumption, and the processing technology complexity requires height, and difficulty is big, and production efficiency is low, and the production cost height is difficult to produce in enormous quantities, can not adapt to the requirement of communication technology fast development.Secondly, common duplexer is not with low-pass filtering, to the interference outside the working frequency range with spuiously penetrate radiation and can't suppress; Moreover common duplexer with the amphiorentation coupling circuit of sampled functions, can't not received and not dispatched transmission signals to antenna end and detect.
China's utility model " transmission duplex preliminary election filtering junction filter ", the patent No.: ZL200420026696.7, a kind of junction filter is disclosed, its improvements are, form by a duplexer filter and a preselection filter on the whole, solved the problem of traditional duplexer filter and preselection filter split, saved the space, and the production technology advanced person, the function admirable of product.But this junction filter does not have the function that clutter suppresses and standing wave detects, and can not adapt to the requirement of mechanics of communication fast development.
Summary of the invention
Problem to be solved in the utility model is, the transmission duplex preliminary election filtering junction filter that overcomes aforementioned body and be parallel rectangle cavity structure does not have the function that clutter suppresses and standing wave detects, and a kind of novel structure and clutter inhibition transmission duplex preliminary election filtering junction filter is provided.
The technical scheme that its technical problem that solves the utility model adopts is as follows: clutter suppresses transmission duplex preliminary election filtering junction filter, comprise the main body of forming by parallel rectangular cavity, cover plate, the resonant cavity inner wire, resonance frequency is reconciled screw, stiffness of coupling adjustment screw between the chamber, input/output interface, it is made up of a duplexer filter and a preselection filter on the whole, it is characterized in that: have the sending and receiving end low-pass filtering resonant cavity that parallels with parallel rectangular cavity in the described duplexer filter main body, described sending and receiving end low-pass filtering resonant cavity lays respectively at duplexer filter main body two ends, the chamber is built-in with the low pass inner wire, low pass inner wire one end connects the resonant cavity inner wire of sending and receiving end, and the other end connects the input/output interface of sending and receiving end.
The further feature of the utility model is: also have the transmission channel chamber that parallels with parallel rectangular cavity in the main body of described clutter inhibition transmission duplex preliminary election filtering junction filter, has main transmission inner wire in the chamber, parallelly successively directly over this master transmission inner wire be equipped with two sampling cables, described sampling cable one end connects the coupling absorbing load, the other end connects the input output interface, the main body upper surface has amphiorentation coupling circuit plate embedded groove, and this trench bottom has the receiving and transmitting signal sampling delivery outlet that is communicated with the transmission channel chamber.
The beneficial effects of the utility model are as follows: this junction filter is simple in structure, compact, ingenious, and volume is little, and its duplexer filter band low-pass filtering, can be good at suppressing interference and stray radiation outside the working frequency range; Duplexer filter band amphiorentation coupling circuit of the present utility model can be received and dispatched transmission signals coupling sampling to antenna end and detect, and in time reports to the police when the antenna end standing-wave ratio worsens, with the maintain communications quality of signals; The structure that parallel rectangular cavity parallels in low-pass filtering resonant cavity and transmission channel chamber and the main body, the duplexer filter main body can be produced in enormous quantities by ripe aluminum extrusion process, processing technology is simple, the junction filter of same type only need leave a kind of mould, number of molds is few, thoroughly change the processing technology of traditional centralized coupling duplexer filter, and product repeats high conformity, do not need coating surface, save raw material, the production efficiency height, production cost is low, adapts to the requirement of communication technology fast development; The utility model junction filter superior performance; production cost can reduce by 80%; of many uses; be easy to realize the large-scale production of many kinds; can design serial multi-cavity duplexer filter; with it is the basic transmission duplex preliminary election filtering combination worker filter that can design mobile communication, microwave radio relay communication, digital cluster communication and wireless access base station etc., for wireless communication engineering provides a kind of desirable core combination filter device.
Description of drawings
Fig. 1 suppresses transmission duplex preliminary election filtering junction filter master TV structure figure for the utility model clutter.
Fig. 2 suppresses face upwarding assumption diagram after transmission duplex preliminary election filtering junction filter removes lower cover for the utility model clutter.
Fig. 3 is the A-A cutaway view of Fig. 2.
Number in the figure is schematically as follows: the 1-duplexer filter, the 2-preselection filter, the 11-main body, 12-cover plate, 13-resonant cavity inner wire, the 14-input/output interface, the 15-input/output interface, 16-resonance frequency adjustment screw, stiffness of coupling adjustment screw between the 19-chamber, 21-low-pass filtering resonant cavity, 22-low-pass filtering resonant cavity, 211-low pass inner wire, 221-low pass inner wire, the resonant cavity inner wire of 131-sending and receiving end, the resonant cavity inner wire of 132-sending and receiving end, 31-cable link slot, 4-transmission channel chamber, 41-master is transmitted inner wire, the 42-cable of taking a sample, 44-input output interface, 45-input output interface, 5-amphiorentation coupling circuit plate embedded groove, 51-receiving and transmitting signal sampling delivery outlet, the 7-antenna opening, 81-open circuit separate space coupling device, 82-open circuit separate space coupling device.
Embodiment
With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in further detail.But the utility model is not limited to given example.
As Fig. 1, Fig. 2, shown in Figure 3, the utility model clutter suppresses transmission duplex preliminary election filtering junction filter, comprise the main body of forming by parallel rectangular cavity 11, cover plate 12, resonant cavity inner wire 13, resonance frequency is reconciled screw 16, stiffness of coupling adjustment screw 19 between the chamber, input/ output interface 14,15, it is made up of a duplexer filter 1 and a preselection filter 2 on the whole, its improvements are: have the sending and receiving end low-pass filtering resonant cavity 21 that parallels with parallel rectangular cavity in duplexer filter 1 main body, 22, sending and receiving end low-pass filtering resonant cavity 21,22 lay respectively at duplexer filter 1 main body two ends, be equipped with low pass inner wire 211 in its chamber respectively, 221, low pass inner wire 211,221 1 ends connect the resonant cavity inner wire 131 of sending and receiving end respectively, 132, the other end connects the input/output interface 14 of sending and receiving end respectively, 15.Among Fig. 1, Fig. 3,7 is antenna opening.
In order to improve the selectivity of filter, among the embodiment as shown in Figure 3, duplexer filter 1 has the resonant cavity by the serpentine ordering, has open circuit separate space coupling device 81 on the dividing plate between the adjacent two row resonant cavitys; Preselection filter 2 has the resonant cavity by the serpentine ordering, has open circuit separate space coupling device 82 on the dividing plate between the adjacent two row resonant cavitys.
As shown in Figure 2, have the cable parallel with the low-pass filtering resonant cavity in the main body of duplexer filter 1 and turn to channel lumens 3, the low-pass filtering resonant cavity 21 that is positioned at the outside turns to the adjacent port of channel lumens 3 to have cable link slot 31 with cable.
As Fig. 2, shown in 3, in the present embodiment, also has the transmission channel chamber 4 that parallels with parallel rectangular cavity in the main body of duplexer filter 1, has main transmission inner wire 41 in the chamber, be equipped with the two piece sampling cables parallel directly over this master's transmission inner wire 41 successively with main transmission inner wire, wherein one label is 42, one end of this sampling cable 42 connects coupling absorbing load (not drawing among the figure), the other end connects input output interface 44, do not draw in another root sampling cable map, it is that 42 sampling cable connected mode is consistent with label, its end connects the coupling absorbing load, the other end connects input output interface 45, and main body 11 upper surfaces have amphiorentation coupling circuit plate embedded groove 5, and this trench bottom has the receiving and transmitting signal sampling delivery outlet 51 that is communicated with transmission channel chamber 4.
In the present embodiment, the transmission channel chamber 4 of duplexer filter 1 is positioned at the centre of duplexer filter 1 main body 11, and amphiorentation coupling circuit plate embedded groove 5 is positioned in the middle of the upper surface of duplexer filter main body 11; Has cover plate (not drawing among the figure) on the amphiorentation coupling circuit plate embedded groove 5 in duplexer filter 1 main body 11.
The structure of duplexer filter 1,2 is identical, in the present embodiment only the structure to duplexer filter 1 be described in detail, the structure of duplexer filter 2 can be with reference to originally being example.
Among the embodiment as shown in Figure 2, the transmitting-receiving low-pass filtering resonant cavity 22,23 of duplexer filter 1,2 adjacents is arranged up and down; As shown in Figure 1, duplexer filter 1 is an integral structure with the main body of preselection filter 2, by the method one-shot forming of section bar extrusion process, can certainly be split-type structural, and realizes that by trip bolt both is fixing.
Claims (8)
1, clutter suppresses transmission duplex preliminary election filtering junction filter, comprise the main body of forming by parallel rectangular cavity, cover plate, the resonant cavity inner wire, resonance frequency is reconciled screw, stiffness of coupling adjustment screw between the chamber, input/output interface, it is made up of a duplexer filter and a preselection filter on the whole, it is characterized in that: have the sending and receiving end low-pass filtering resonant cavity that parallels with parallel rectangular cavity in the described duplexer filter main body, described sending and receiving end low-pass filtering resonant cavity lays respectively at duplexer filter main body two ends, the chamber is built-in with the low pass inner wire, low pass inner wire one end connects the resonant cavity inner wire of sending and receiving end, and the other end connects the input/output interface of sending and receiving end.
2, clutter according to claim 1 suppresses transmission duplex preliminary election filtering junction filter, it is characterized in that described duplexer filter has the resonant cavity by the serpentine ordering, has open circuit separate space coupling device on the dividing plate between the adjacent two row resonant cavitys.
3, clutter according to claim 1 suppresses transmission duplex preliminary election filtering junction filter, it is characterized in that described preselection filter has the resonant cavity by the serpentine ordering, has open circuit separate space coupling device on the dividing plate between the adjacent two row resonant cavitys.
4, clutter according to claim 1 suppresses transmission duplex preliminary election filtering junction filter, it is characterized in that having the cable parallel with the low-pass filtering resonant cavity in the main body of described duplexer filter turns to channel lumens, be positioned at the low-pass filtering resonant cavity in the outside and adjacent port that cable turns to channel lumens and have the cable link slot.
5, clutter according to claim 1 suppresses transmission duplex preliminary election filtering junction filter, it is characterized in that also having the transmission channel chamber that parallels with parallel rectangular cavity in the main body of described duplexer filter, has main transmission inner wire in the chamber, be equipped with the two piece sampling cables parallel directly over this master's transmission inner wire successively with main transmission inner wire, described sampling cable one end connects the coupling absorbing load, the other end connects the input output interface, the main body upper surface has amphiorentation coupling circuit plate embedded groove, and this trench bottom has the receiving and transmitting signal sampling delivery outlet that is communicated with the transmission channel chamber.
6, clutter according to claim 5 suppresses transmission duplex preliminary election filtering junction filter, it is characterized in that having amphiorentation coupling circuit plate embedded groove on the top main body in described duplexer filter transmission channel chamber.
7, clutter according to claim 6 suppresses transmission duplex preliminary election filtering junction filter, it is characterized in that having cover plate on the amphiorentation coupling circuit plate embedded groove in described duplexer filter main body.
8, clutter according to claim 1 suppresses transmission duplex preliminary election filtering junction filter, and the main body that it is characterized in that described duplexer filter and preselection filter is an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200447078U CN201117772Y (en) | 2007-11-09 | 2007-11-09 | Clutter suppressed receiving/transmitting switching pre-selected filtering combining filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200447078U CN201117772Y (en) | 2007-11-09 | 2007-11-09 | Clutter suppressed receiving/transmitting switching pre-selected filtering combining filter |
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| Publication Number | Publication Date |
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| CN201117772Y true CN201117772Y (en) | 2008-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200447078U Expired - Fee Related CN201117772Y (en) | 2007-11-09 | 2007-11-09 | Clutter suppressed receiving/transmitting switching pre-selected filtering combining filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114024111A (en) * | 2021-11-08 | 2022-02-08 | 南京希尼尔通信技术有限公司 | KU-band four-channel connected filter bank and production method thereof |
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2007
- 2007-11-09 CN CNU2007200447078U patent/CN201117772Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114024111A (en) * | 2021-11-08 | 2022-02-08 | 南京希尼尔通信技术有限公司 | KU-band four-channel connected filter bank and production method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20131109 |