基于反射系数的短波天馈线检测研究

Study on Detection Method of Shortwave Antenna and Feeder Line System based on Reflection Coefficient

短波天线体积庞大、线杆高度较高,馈线长度较长,检查维修较为不便。对短波天线馈线系统的检查和测试一直缺乏经济、有效的技术手段。提出根据短波天线馈线系统的传输特性,利用电波反射特点,运用定向耦合器分离入射波和反射波,计算短波天线馈线系统的当前反射系数,与其初始值进行比较,从而为判断天线馈线系统性能变化提供定量的参考数据,是一种检测短波天线馈线有效、经济的方法。

For its huge size,relatively high antenna mast and long feeder line,the shortwave antenna is inconvenient for examination and maintenance.It is always deficient in economic and efficient technical methods for examination and test of the shortwave antenna and feeder line system.Based on the transfer characteristic of shortwave antenna and feeder,the features of electric wave reflection,an economic and efficient technical method for examination and detection of shortwave antenna and feeder line is proposed.This method,with directional coupler for separating the incident wave from reflected wave,for calculating the current reflection coefficient of shortwave antenna and feeder line system,and for comparing with its initial value,could provide quantitative data for the judgement of antenna and feeder line system.