CN2701093Y

CN2701093Y - Low-loss high-selectivity four-frequency combining filter

Info

Publication number: CN2701093Y
Application number: CN 200420026695
Authority: CN
Inventors: 庄昆杰; 郑德典; 肖利蒙; 郭晓宏
Original assignee: Quanzhou Leike Microwave Co ltd; Shenzhen Grentech Co Ltd
Current assignee: Quanzhou Leike Microwave Co ltd; Shenzhen Grentech Co Ltd
Priority date: 2004-04-28
Filing date: 2004-04-28
Publication date: 2005-05-18
Anticipated expiration: 2014-04-28

Abstract

The utility model discloses a low-loss high-selectivity four-frequency combining filter, comprising a rectangular main body, a covering plate, an inner conductor, the adjusting screw of resonance frequency, an open-circuit cavity-separating coupling device, an input-output interface. The main body is provided with double-layer eight lines of parallel rectangular chambers which correspond to double-layer four groups of cavity resonators, and each group of eight cavity resonators is arrayed in 'S' shape; two cavity resonators on each line of each layer are coupled in manner of distribution, and two cavity resonators whose sequence numbers are sequential between lines are coupled in manner of centralization. The low-loss high-selectivity four-frequency combining filter has novel structure, the cavity resonators adopt the manner of organic combination of the distributed coupling and the centralized coupling, a plurality of chamber coupling ways are provided, and the requests of low loss and high selectivity for the filter are both satisfied; the main body of the filter can conduct mass production with the method of section-bar extrusion processing, and the low-loss high-selectivity four-frequency combining filter has simple processing process, high production efficiency and low production cost; the low-loss high-selectivity four-frequency combining filter can save raw materials, the low-loss high-selectivity four-frequency combining filter is easy to conduct mass production, so the low-loss high-selectivity four-frequency combining filter adapts to the request of the instant development for the communication technology.

Description

Low loss high selectivity four closes path filter frequently

Technical field

The utility model relates to the microwave filter of using in a kind of wireless communication field, and particularly a kind of multiplex (MUX) closes path filter.

Background technology

The multiplex (MUX) closes path filter and is applied to the shared sky/feeder system of a plurality of systems of microwave communication different frequency range.A kind of four frequency combiners are arranged at present, its structure as depicted in figs. 1 and 2, the resonant cavity that has back-to-back double-deck four groups of Z1, Z2, Z3, the centralized coupling of Z4 in its main body (outer conductor) 1, each group comprise two rows, four row totally 8 resonant cavitys, respectively corresponding frequency range.4 for inner wire, 2 is outer conductor between the chamber that has coupling window among the figure, and 5 is the resonance frequency adjustment screw, and 6 is cover plate, and 7 are open circuit separate space coupling device, and 3 is input/output interface.Its resonant cavity group is that rotary-cut processes on the upper and lower end face of a bulk metal piece.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 is very complicated, 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, provides a kind of low loss high selectivity four of novel structure to close path filter frequently.

The technical scheme that its technical problem that solves the utility model adopts is as follows: a kind of low loss high selectivity four closes path filter frequently, the main body that comprises rectangle, cover plate, inner wire, the resonance frequency adjustment screw, open circuit separate space coupling device, input/output interface, have back-to-back double-deck four groups of resonant cavitys in the main body, each group comprises two rows, four row totally 8 resonant cavitys, respectively corresponding frequency range, it is characterized in that having in the main body with resonant cavity and arrange the parallel rectangular cavity of corresponding double-deck 8 row, every group of resonant cavity pressed the serpentine ordering, between two resonant cavitys of every layer of every row is distributed couplings, is centralized coupling between two resonant cavitys linking to each other of sequence number between every stratose and the row.

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 the parallel chamber of double-deck 8 row,

3, according to filter Len req size cutting section bar, make main body,

4, according to concentrate coupling parameter require sequence number between design row and the row link to each other resonant cavity physical dimension and process, 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 between the resonant cavity, 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, is easy to produce in enormous quantities, adapts to the requirement of communication technology fast development.

Description of drawings

Fig. 1 closes path filter structure vertical view frequently for four of prior art.

Fig. 2 is Fig. 1 Filter Structures front view.

Fig. 3 closes path filter profile schematic diagram frequently for the utility model four.

Fig. 4 closes the vertical view that path filter removes the main body upper surface frequently for the utility model four.

Fig. 5 closes the front view that path filter removes front shroud frequently for the utility model four.

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. 3, Fig. 4 and shown in Figure 5, the utility model low loss high selectivity four closes path filter frequently, the main body (outer conductor) 1 that comprises rectangle, cover plate 6, inner wire 4, resonance frequency adjustment screw 5, open circuit separate space coupling device 7, input/output interface 3, have back-to-back double-deck four groups of resonant cavity Z1 in the main body 1, Z2, Z3, Z4, each group comprises two rows, four row totally 8 resonant cavity X1-X8, respectively corresponding frequency range, it is characterized in that having in the main body 1 with resonant cavity and arrange the parallel rectangular cavity of corresponding double-deck 8 row, every group of 8 resonant cavitys are pressed the serpentine ordering, two resonant cavity X1 of every layer of every row and X2, X3 and X4, X5 and X6, between X7 and the X8 distributed couplings, sequence number links to each other between every stratose and the row two resonant cavity X2 and X3, X4 and X5, it between X6 and the X7 centralized coupling.

In embodiment as shown in Figure 4, open circuit separate space coupling device 7 is between the X1 and X4, X5 and X8 of every group of resonant cavity.

When the utility model filter is used for Personal Handyphone System (PHS), 3G (Third Generation) Moblie (3G) and three kinds of standard common antenna of WLAN (wireless local area network) (W-LAN) or cable transmission, can obtain very high selectivity and extremely low loss, can be to the selectivity of PHS and 3G greater than-75dB, loss is less than-1.2dB.

Claims

1, low loss high selectivity four closes path filter frequently, the main body that comprises rectangle, cover plate, inner wire, the resonance frequency adjustment screw, open circuit separate space coupling device, input/output interface, have back-to-back double-deck four groups of resonant cavitys in the main body, each group comprises two rows, four row totally 8 resonant cavitys, respectively corresponding frequency range, it is characterized in that having in the main body with resonant cavity and arrange the parallel rectangular cavity of corresponding double-deck 8 row, every group of resonant cavity pressed the serpentine ordering, between two resonant cavitys of every layer of every row is distributed couplings, is centralized coupling between two resonant cavitys linking to each other of sequence number between every stratose and the row.