Signal loop device and base-station common antenna-feedback system using same

Abstract

The equipment includes parts: emission filter, its input connected to cabinet interface of the equipment, and its output connected to antenna interface; reception filter at antenna end together with emission filter constitute duplexer at antenna end, its input connected to antenna interface, and its output connected to power divider; reception filter at cabinet end together with emission filter constitute duplexer at cabinet end, its input connected to interface for receiving input, and its output connected to the cabinet interface; power divider divides output signal of reception filter at antenna end into two routes of carrying same signal, its input connected to the reception filter at antenna end, and its two outputs connected to output interface of diversity reception, and of main reception. The invention also discloses common antenna feeder lines of base station. Features are: small influence on performance of original base station, reliable and low coat, and good generality.

Description

technical field [0001] The invention relates to the base station technology in the field of mobile communication, in particular to a signal combining device and a base station common-antenna feeder system realized by the signal combining device. Background technique [0002] Different mobile communication systems or different services of the same mobile communication system need to use different base stations. For example, the new CDMA 2000 data service EV-DO that is being promoted needs to use different base stations from the mature CDMA 2000 voice service 1X. Here, the base station includes an indoor cabinet and an outdoor antenna feeder. Generally speaking, outdoor antenna feeders need to be installed at high places, usually on iron towers and building roofs. However, now that various mobile communication standards coexist, outdoor antenna feeders of different systems of different mobile communication operators, such as GSM, CDMA 2000, WCDMA, etc., have long been covered...

AI Technical Summary

Problems solved by technology

It can be seen from this that: First, although the insertion loss of the narrowband filter for the transmitted signal is low, the scheme needs to separate the transmitted signal from the transmitted and received signals of the two base stations, and then combine them with the received signal. Therefore, the structure Complicated; second, counting the insertion loss of the additional signal separation and combination link, the total insertion loss of the narrowband filter combination scheme for the transmitted signal is about 1.5dB; third, for different frequency points of the transmitted signal, the narrowband needs to be retuned filter, so the operating bandwidth is narrow and not universal

[0006] It can be seen that in the prior art, the disadvantage of the broadband hybrid combiner is that the insertion loss of the transmitted signal is large, thus affecting the coverage capability of the base station; the disadvantage of the narrowband filter combiner is that the additional equipment is large in size and high in cost It will cause a relatively large insertion loss to the transmitted signal, and the working bandwidth is narrow and the versatility is poor

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