CN206461597U

CN206461597U - A kind of POI combinings system

Info

Publication number: CN206461597U
Application number: CN201720169365.6U
Authority: CN
Inventors: 谢瑞华; 黄磊; 唐峥
Original assignee: Rosenberger Technology Kunshan Co Ltd
Current assignee: Prologis Communication Technology Suzhou Co Ltd
Priority date: 2017-02-24
Filing date: 2017-02-24
Publication date: 2017-09-01
Anticipated expiration: 2027-02-24

Abstract

The utility model discloses a kind of POI combinings system, including the first combiner and the second combiner, first combiner includes a plurality of first wave filters, each first wave filter is connected with the signalling channel of corresponding band, second combiner includes the second wave filter and matched filter, the signalling channel of corresponding band is provided with second wave filter, absorbing load is provided with matched filter, wherein, the resonator quantity of at least one matched filter is less than resonator quantity of the correspondence with the wave filter of frequency range first, the utility model by matching by carrying out the volume that small-sized optimization design substantially reduces matching wave filter with wave filter, the volume of the second combiner containing load has been reduced by simultaneously, overall POI, which is installed, to be simplified, cost is also reduced simultaneously.

Description

A kind of POI combinings system

Technical field

The utility model is related to a kind of communication passive device POI systems, more particularly, to a kind of POI combinings system.

Background technology

POI（Point of interface, multisystem mixing platform）Mostly customed product, for different application rings Border, operating frequency combiner and electric bridge combiner, by the multiple business of access（CDMA, GSM, WCDMA, UMTS, LTE etc.）Letter Number combining, and the signal after combining is introduced into antenna feeder compartment system, reach the purpose for making full use of resource, reducing investment outlay.This is System is mainly used in the heavy construction in-door covering such as conference and exhibition center, exhibition center, airport, subway, and the system also there is input power to examine Survey and combining power output detection function, monitoring input, output port signal power size and the detection of output port standing wave etc. Function.

Traditional POI systems, multiplefrequency mixer suppresses requirement to meet filter with low insertion loss height, and the wave filter of combiner is often Containing the even more resonators in eight tunnels, need to connect the multiplefrequency mixer of matched load for entrance and designed without reduction, But by unnecessary no port of wave filter, directly installing 50 ohm of matched loads additional, such way is directly simple, but this The wave filter that matching is used only is made on road, is also often to be made up of several resonators, volume is generally larger, and cost is higher.

Utility model content

The purpose of this utility model is that the defect for overcoming prior art, there is provided a kind of POI combinings system, is set by optimization Meter, reduces the volume of matching wave filter, so as to reduce cost.

To achieve the above object, the utility model proposes following technical scheme：A kind of POI combinings system, the combining system System includes the first combiner and the second combiner, and first combiner includes a plurality of first wave filters, each first filtering Device is connected with the signalling channel of corresponding band, and second combiner includes the second wave filter and matched filter, described second It is provided with wave filter on the signalling channel of corresponding band, the matched filter and is provided with absorbing load, wherein, at least one The resonator quantity of matched filter is less than resonator quantity of the correspondence with the wave filter of frequency range first.

Preferably, the resonator quantity of all matched filters is less than resonator number of the correspondence with the wave filter of frequency range first Amount.

Preferably, the matched filter is to include four cavity filters of four resonators.

Preferably, the matched filter is three cavity filters or five cavity filters.

Preferably, first combiner and the second combiner are connected with electric bridge respectively.

Preferably, the electric bridge is 3dB electric bridges.

Multiple resonators of original matched filter are reduced to four chambers or less by the utility model, hence it is evident that reduced corresponding The volume of multiplefrequency mixer, the combiner close to each other to frequency band is especially apparent effectively, because multiplefrequency mixer volume substantially subtracts Few, overall POI, which is installed, to be simplified, and cost is also reduced simultaneously.

Brief description of the drawings

Fig. 1 is to use the utility model POI combining system schematics.

Reference：1st, the first combiner, the 11, first wave filter, the 2, second combiner, the 21, second wave filter, 22, With wave filter, 3,3dB electric bridges, 4, load.

Embodiment

Below in conjunction with accompanying drawing of the present utility model, the technical scheme progress to the utility model embodiment is clear, complete Description.

As shown in figure 1, the utility model POI combinings system includes the first combiner 1, the second combiner 2, the and of 3dB electric bridges 3 Load 4, the combiner 2 of the first combiner 1 and second is connected with 3dB electric bridges 3 respectively, and first combiner 1 includes plural number Individual first wave filter 11, each first wave filter is connected with the signalling channel of corresponding band（CDMA850、GSM900、GSM1800- 1）, second combiner 2 includes some second wave filters 21 and at least one matched filter 22, the matching of wherein at least part Wave filter 22 is four cavity filters with four resonators, and resonator is reduced to four chambers, because matched filter is only needed to completely Its frequency band return loss characteristic of foot, it is not necessary to consider its Insertion Loss and rejection characteristic, therefore tradition is directly connect to the second wave filter of load Four chamber optimization designs, the matched filter greatly reduced as volume are carried out, while being reduced by the second combiner containing load Volume, overall POI, which is installed, to be simplified, cost also reduction simultaneously.

Show that each combiner includes the embodiment of three wave filters, specifically, first combiner 1 in Fig. 1 Including three the first wave filters 11, second combiner 2 includes second wave filter 21 and two matched filters 22, institute State the signalling channel that the second wave filter 21 is connected with corresponding band（GSM1800-2）, it is with system with first wave filter 11 Wave filter, other two matched filters 22 are four cavity filters, and absorbing load 4 is provided with each four cavity filter.

Optionally, in the present embodiment, in the first wave filter quantity of first combiner and the second combiner Second wave filter, the quantity of matched filter can be set according to actual needs, and two second are can be set in such as the second combiner Wave filter and a matched filter, as long as particular number meets the setting of frequency range needs；Matched filter 22 can be set For four chambers, three chambers or five cavity configurations can also be designed as according to actual needs, because the resonator of matched filter is relative to right It should be reduced with the quantity of the first wave filter of frequency range 11, therefore the second combiner volume reduces.

In this specific embodiment, first combiner 1, the second combiner 2 are connected by two ports and 3dB electric bridges respectively Connect, the opposite side of the 3dB electric bridges is connected by port with antenna-feedback system respectively, optionally, is used as the 3dB of power distribution Electric bridge can also be other electric bridges or passive device.

The utility model does not have the requirement that any Insertion Loss suppresses by using matching wave filter, only need to consider accordingly leading to With interior return loss it is good the characteristics of, by load-carrying wave filter carry out four chamber optimization designs, meet its passband return loss requirement, Ran Hou Absorbing load is connect on this matched filter port, so as to greatly reduce the resonator number of matching wave filter.With tradition The combiner of method first and the second combiner same volume are compared, and by optimization design of the present utility model, will contain load multifrequency Combiner volume is greatly reduced, and in combining frequency range increasingly today close to each other, the multiplefrequency mixer volume containing load is even more aobvious Write and be less than traditional multiplefrequency mixer, using more advantage, it is achieved thereby that inexpensive, easy to install advantage.

Technology contents and technical characteristic of the present utility model are had revealed that as above, but those skilled in the art still may be used A variety of replacements and modification without departing substantially from the utility model spirit can be made based on teaching of the present utility model and announcement, therefore, this Utility model protection scope should be not limited to the content disclosed in embodiment, and should include various without departing substantially from replacement of the present utility model And modification, and covered by present patent application claim.

Claims

1. a kind of POI combinings system, it is characterised in that the combining system includes the first combiner and the second combiner, described First combiner includes a plurality of first wave filters, and each first wave filter is connected with the signalling channel of corresponding band, and described the Two combiners include being provided with the signalling channel of corresponding band on the second wave filter and matched filter, second wave filter, Absorbing load is provided with the matched filter, wherein, the resonator quantity of at least one matched filter is same less than correspondence The resonator quantity of the wave filter of frequency range first.

2. POI combinings system according to claim 1, it is characterised in that the resonator quantity of all matched filters is equal Less than resonator quantity of the correspondence with the wave filter of frequency range first.

3. POI combinings system according to claim 1 or 2, it is characterised in that the matched filter be include four it is humorous Shake four cavity filters of chamber.

4. POI combinings system according to claim 1 or 2, it is characterised in that the matched filter is three cavity filters Or five cavity filters.

5. POI combinings system according to claim 1, it is characterised in that first combiner and the second combiner point It is not connected with electric bridge.

6. POI combinings system according to claim 5, it is characterised in that the electric bridge is 3dB electric bridges.