一种超短波宽带高功率振子天线的设计与实现

Design and implementation of an ultrashort wave wideband high power vibrator antenna

针对某些高功率辐射需求,研制了一种工作在超短波频段、功率容限高、工作带宽宽的振子形式天线。馈电采用空气硬同轴线结构,兼具宽频带和大功率容量特点,能够耐受2000 W的连续波功率。天线辐射部分采用领结型对称振子形式,有效展宽工作带宽。天线整体的电气绝缘和结构强度通过耐高温玻璃钢和聚四氟乙烯材料实现。该天线满足电压驻波比VSWR<2.0时的相对带宽达到66.6%,在整个工作带宽内,方向图性能稳定。该振子天线可以作为阵列天线中的阵元,结合分布式功放,实现更高的定向辐射功率。

In order to meet the demand of high power radiation requirements,a kind of ultrashort wave vibrator antenna with high power tolerance and wide working band is developed.The feed adopts air hard coaxial line structure,which has the characteristics of wide band and high power capacity,and can withstand 2000 W continuous wave power.The bow-tie type symmetrical oscillator is used in the radiating section of the antenna to effectively extend the operating bandwidth.The overall electrical insulation and structural strength of the antenna are achieved by high temperature resistant glass steel and PTFE materials.The relative bandwidth of the antenna reaches 66.6%,when the voltage standing wave ratio is less than 2.0.In the whole working bandwidth,the directional pattern performance is stable.Further,the vibrator antenna can be used as the array element of the antenna array,combined with the distributed power amplifier to achieve higher directional radiation power.