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在日本国内,电力用微波无线电路,用于数百公里的信息传输。其间中继站多数为无人站,且多设置在偏僻山区,为此,对中继站设备提出了无人维护、高度可靠、低功耗、小型轻量等要术。随着近年来半导体技术的发展,由于微波半导体、特别是砷化镓场效应晶体管性能的改善(因而使微波高增益大功率放大器易于制作),以及太阳能电池效率的提高,使微波直接中继方式在日本国内外重新受到重视。本文就基于这种技术动向而研制的7GHz频带微波直接中继无线设备作一介绍。
In Japan, microwave radio circuits are used for power transmission for hundreds of kilometers of information. In the meantime, the majority of relay stations are unmanned stations, and are mostly located in remote mountainous areas. Therefore, the proposed relay station equipment has no maintenance, high reliability, low power consumption, small size and light weight. With the development of semiconductor technology in recent years, due to the improvement of the performance of microwave semiconductors, especially the gallium arsenide field effect transistor (thus making the microwave high-gain high-power amplifier easy to make) and the improvement of the solar cell efficiency, the microwave direct relay Re-emphasized in Japan and abroad. This article is based on this technology trends and 7GHz band microwave direct relay wireless device made an introduction.