Automatic measuring technique for antenna isolating level of direct amplifying station with antenna transmission

Abstract

This invention relates to an automatic testing technology for antenna isolation degree of wireless transmitting station containing a detecting module which is composed of RF signal generator, RF signal treatment and background control analyzer display, antenna 1 and 2, among which RF generator generates a RF signal controlled by background analysis, transmitton via antenna 1 and received by antenna 2 than enters into the background analysis unit after being treated by RF signal treatment unit and finally displays so as to test antenna isolation degree of direct transmitting station timely by monitors. This invention suits the production of the present stations (containing GSM900MHz, DCS1800MHz, CDMA800MH-z and other frequency bands)

Description

technical field [0001] The invention belongs to the mobile communication technology, in particular to an automatic detection technology of the antenna isolation degree of a wireless transmission repeater. Background technique [0002] Mobile communication has achieved tremendous development in China. At present, domestic GSM mobile phone users have exceeded 100 million users. At the same time, with the opening of China Unicom's CDMA system, it can be expected that a new round of great development of mobile communication will take place. With the development of mobile communication in China, due to China's vast land and sparse population and uneven population distribution, in many places, such as villages, highways, railways, etc., it is impossible to use base stations due to the small traffic volume and cost considerations. To cover, so for the different networks of China Mobile and China Unicom, a large number of repeaters are needed to cover the mob...

AI Technical Summary

Problems solved by technology

In the opening process of the wireless repeater, the antenna isolation (the field strength difference between the donor antenna and the retransmission antenna port) is the primary goal in system consideration and engineering installation. If the difference between the donor antenna and the retransmission antenna When the isolation between them is smaller than the uplink or downlink gain of the system, the performance of the repeater system will drop rapidly, and in severe cases, it will cause the system to self-excite, and even affect the call effect and indicators of the base station

[0003] The second method is to rely on the signal source and spectrum analyzer test. This test method is to transmit the uplink / downlink RF signal in the frequency band where the repeater is located through the signal source and a donor antenna, and receive it through the spectrum analyzer on the other antenna. For this signal, the strength difference between the transmitted signal and the received signal is the antenna isolation. This method is a more accurate method, but it needs to carry bulky and expensive instruments to the construction site when the project is opened and maintained. Therefore, It's not very convenient

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