CN2701092Y - Single side suppression type low-loss high-selectivity transmitting-receiving duplex filter - Google Patents
Single side suppression type low-loss high-selectivity transmitting-receiving duplex filter Download PDFInfo
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- CN2701092Y CN2701092Y CN 200420026697 CN200420026697U CN2701092Y CN 2701092 Y CN2701092 Y CN 2701092Y CN 200420026697 CN200420026697 CN 200420026697 CN 200420026697 U CN200420026697 U CN 200420026697U CN 2701092 Y CN2701092 Y CN 2701092Y
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Abstract
The utility model discloses a single side suppression type low-loss high-selectivity transmitting-receiving duplex filter, which is symmetrically formed by two six-chamber filters. The main body is provided with four lines of parallel rectangular chambers, and the six cavity resonators of each filter are arrayed in 'U' shape for four lines; three cavity resonators in each line are coupled in manner of distribution, and two cavity resonators whose sequence numbers are sequential between lines are coupled in manner of distribution; an open-circuit cavity-separating coupling device is arranged between two cavity resonators on the head and the tail of each line of a transmitting end, a short-circuit coupling device is arranged between two cavity resonators on the head and the tail of each line of a receiving end. The single side suppression type low-loss high-selectivity transmitting-receiving duplex filter has novel structure and adopts the organic-combination manners of distributed coupling and centralized coupling, which is convenient to conduct cavity-separating coupling, the requests of low loss and high selectivity for the filter are both satisfied; the main body of the filter can conduct mass production by the method of sectional-material extrusion processing, the single side suppression type low-loss high-selectivity transmitting-receiving duplex filter has simple processing process and low production cost, and the single side suppression type low-loss high-selectivity transmitting-receiving duplex filter adapts to the request for the instant development of the communication technology.
Description
Technical field
The utility model relates to the microwave filter of using in a kind of wireless communication field, particularly a kind of monolateral inhibition type transmission duplex filter.
Background technology
Monolateral inhibition type transmission duplex filter applies needs occasion that successive bands is suppressed in microwave communication transmit-receive sharing sky/feeder system.It comprises two groups of filtering devices of sending and receiving, realizes receiving and dispatching by duplexing interface and closes the road.A kind of monolateral inhibition type transmission duplex filter is arranged at present, and its structure is made up of two 6 cavity filter symmetries of centralized coupling as shown in Figure 1, and 6 resonant cavitys of each filter are pressed the serpentine ordering, are arranged in 3 rows, 2 row.R1-R6 represents 6 resonant cavitys of receiving terminal, and T1-T6 represents 6 resonant cavitys of transmitting terminal.1 is that main body (outer conductor), 2 is outer conductor between the chamber that has coupling window among the figure, 71,72 is that open circuit, short circuit separate space coupling device (are coupled by twice short circuit, improve the inhibition of frequency band left end, by twice open circuit coupling, improve the inhibition of frequency band right-hand member), 4 be inner wire, 3 for input/output interface owing to be illustrated as the state of overlooking of opening cover plate, thus do not draw among the figure cover plate and fixing on the cover board and the resonance frequency adjustment screw corresponding with inner wire.The rotary-cut on a bulk metal piece of its resonant cavity group processes.Its exist major defect have three: 1, reduce its insert loss, improve its optionally measure only be confined to the raising of machining accuracy and carry out surface treatment (silver-plated); 2, processing technology complexity requires height, and difficulty is big; 3, high material consumption, 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.
Summary of the invention
Technical problem to be solved in the utility model is, overcomes the shortcoming of prior art, and a kind of monolateral inhibition type low loss high selectivity transmission duplex filter is provided.
The technical scheme that its technical problem that solves the utility model adopts is as follows: a kind of monolateral inhibition type low loss high selectivity transmission duplex filter, the main body that comprises rectangle, cover plate, inner wire, the resonance frequency adjustment screw, input/output interface, form by two 6 cavity filter symmetries, it is characterized in that having in the main body the parallel rectangular cavity of 4 row, 6 resonant cavitys of each filter are by the ordering of " U " shape, be arranged in 4 row altogether, between 3 resonant cavitys of every row is distributed couplings, be centralized coupling between two resonant cavitys linking to each other of sequence number between row and the row, have open circuit separate space coupling device between two resonant cavitys end to end of the every row of transmitting terminal, the every row of receiving terminal have short circuit separate space coupling device between two resonant cavitys end to end.
Manufacturing process of the present utility model comprises the steps:
1, according to the corresponding main body mould of Design of Filter parameter manufacturing,
2, squeeze out main body section bar by the large-size extruder heating with 4 parallel chambeies,
3, according to the bandwidth Len req cutting section bar of filter, make main body,
4, according to concentrating coupling parameter to require the physical dimension of the continuous resonant cavity of design sequence number and processing, promptly on the space bar of chamber, process corresponding breach,
5, assembling inner wire, resonance frequency adjustment screw, input/output interface,
6, assembling two end cover plate, so far, the manufacturing of the utility model filter product finishes.
The beneficial effects of the utility model are as follows: novel structure, the mode that adopts distributed couplings and centralized coupling to organically combine, learn from other's strong points to offset one's weaknesses, overcome the deficiency of mode separately, has coupling path between multiple chamber, be convenient to carry out the separate space coupling, thereby can improve the selection performance of filter to a great extent, taken into account the requirement of filter low-loss and high selectivity; Filter main body can the method by the section bar extrusion process be produced in enormous quantities, and processing technology is simple,, save raw material, the production efficiency height, production cost is low, adapts to the requirement of communication technology fast development.
Description of drawings
Fig. 1 is the transmission duplex filter construction schematic diagram of prior art.
Fig. 2 is the utility model transmission duplex filter profile schematic diagram.
Fig. 3 removes the structure vertical view of main body upper surface for Fig. 2 median filter.
Fig. 4 removes the right view of right-hand member cover plate for Fig. 2 median filter.
Embodiment
With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in detail.But the utility model is not limited to given embodiment.
As Fig. 2, Fig. 3 and shown in Figure 4, the monolateral inhibition type of the utility model low loss high selectivity transmission duplex filter, the main body (outer conductor) 1 that comprises rectangle, cover plate 6, inner wire 4, resonance frequency adjustment screw 5, input/output interface 3, form by two 6 cavity filter symmetries, R1-R6 represents 6 resonant cavitys of receiving terminal, T1-T6 represents 6 resonant cavitys of transmitting terminal, has the parallel rectangular cavity of 4 row in the main body 1,6 resonant cavitys of each filter are by the ordering of " U " shape, be arranged in 4 row altogether, 3 resonant cavity T1-T3 of every row, T4-T6, R1-R3, it between the R4-R6 distributed couplings, sequence number links to each other between row and the row two resonant cavity T3 and T4, it between R3 and the R4 centralized coupling, two the resonant cavity T1 end to end and the T3 of the every row of transmitting terminal filter, has open circuit separate space coupling device 71 between T4 and the T6, two the resonant cavity R1 end to end and the R3 of the every row of receiving terminal filter, has short circuit separate space coupling device 72 between R4 and the R6.
The utility model filter is used for the relay station of mobile communication CDMA standard, and when centre frequency is 800MHz, bandwidth during less than 10MHz, it inserts loss and can reach less than 0.8dB, suppresses when departing from sideband centre frequency edge 25M greater than-40dB.
Claims (1)
1, monolateral inhibition type low loss high selectivity transmission duplex filter, the main body that comprises rectangle, cover plate, inner wire, the resonance frequency adjustment screw, input/output interface, form by two 6 cavity filter symmetries, it is characterized in that having in the main body the parallel rectangular cavity of 4 row, 6 resonant cavitys of each filter are by the ordering of " U " shape, be arranged in 4 row altogether, between 3 resonant cavitys of every row is distributed couplings, be centralized coupling between two resonant cavitys linking to each other of sequence number between row and the row, have open circuit separate space coupling device between two resonant cavitys end to end of the every row of transmitting terminal, the every row of receiving terminal have short circuit separate space coupling device between two resonant cavitys end to end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420026697 CN2701092Y (en) | 2004-04-28 | 2004-04-28 | Single side suppression type low-loss high-selectivity transmitting-receiving duplex filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420026697 CN2701092Y (en) | 2004-04-28 | 2004-04-28 | Single side suppression type low-loss high-selectivity transmitting-receiving duplex filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2701092Y true CN2701092Y (en) | 2005-05-18 |
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ID=34771360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420026697 Expired - Lifetime CN2701092Y (en) | 2004-04-28 | 2004-04-28 | Single side suppression type low-loss high-selectivity transmitting-receiving duplex filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2701092Y (en) |
-
2004
- 2004-04-28 CN CN 200420026697 patent/CN2701092Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140428 Granted publication date: 20050518 |