为使无线电话机增加通话距离,改善通话效果,我们设计试制的主台天线系列,系全向高增益共轴天线阵。经试用,四元天线于180km台距各向通话质量可达5分,效果良好。由于采用了新型的螺旋反相器,缩短了天线长度,保证了高增益,而且电性能良好,结构简单,加工、架设方便,具有明显的优越性。 In order to make the radiotelephone increase the call distance and improve the call effect, we design a trial series of the main station antenna, which is an omnidirectional high-gain coaxial antenna array. After trial, four yuan antenna in the 180km distance from each call quality up to 5 points, the effect is good. As a result of the new spiral inverter, shortened the length of the antenna to ensure high gain, and good electrical properties, simple structure, processing, easy to set up, with obvious advantages.