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本文主要介绍为“四川省都江堰管理局”研制的一种VGF频段的2JDD-6型机的主台“水平极化全向天线”。并对天线电气特性进行了理论上的计算、分析及实际测量。测得天线增益G_K≥7db、带宽在约为5%的范围内的驻波系数ρ≤1.2。本天线和3W发射机相配、与50km半径内的各分台间进行通信,效果很好。它不仅是一种良好的超短波通信天线,也是一种较为理想的小型电视差转台的发射天线。
This paper mainly introduces the “horizontal polarization omnidirectional antenna” as the main platform of 2JDD-6 for VGF band developed by “Dujiangyan Administration of Sichuan Province”. The theoretical calculation, analysis and actual measurement of the antenna’s electrical characteristics are carried out. Measured antenna gain G_K ≥ 7db, the bandwidth of about 5% of the standing wave coefficient ρ ≤ 1.2. The antenna and 3W transmitter match, and 50km radius of the sub-stations within the communication, the effect is very good. It is not only a good ultra-shortwave communication antenna, but also a more ideal small TV repeater transmitting antenna.