X波段高功率微波一维相扫漏波天线阵

研究了一种可一维相扫的X波段高功率微波漏波天线阵,该天线阵由高功率微波功分网络、移相器和漏波平面阵组成。漏波平面阵由8个矩波导漏波线阵组成,增益29.6dB,口面效率70%,设计功率容量0.91GW;功分器网络采用圆波导TM01-双矩波导TE01模式变换和串列式矩波导功分器形式,输出端口间的不平衡度小于1.6dB,设计功率容量1.1GW;移相器采用侧壁簧片弯进改变矩波导宽度,实现0~360°移相,单路功率容量150MW。整阵相扫性能的全波仿真分析结果表明,在主瓣增益下降3dB的情况下,扫描角度可达到±40°。

X-band high power microwave leaky-wave-antenna array with one-dimension scanning capability

An X-band high power microwave leaky-wave-antenna array with one-dimension scanning capability is introduced in this paper. The antenna contains an 8-elements leaky-wave waveguide array, a 1-8 port power divider, and eight high power phase shifters. The gain of the leaky-wave array is 29.6 dB, and the aperture efficiency is 70%. The divider first converts the TM01 mode of circular waveguide into TE01 mode of rectangular waveguide, then divides the input power into eight ports with cascaded power split waveguide branch. Differences between the output ports are less than 0.16 dB, the power handling capacity is 1.1 GW. The phase shifter is realized by changing the width of the rectangular waveguide with a flexible brass reed, the power handling capacity is 150 MW per shifter when it works under vacuum environment. The beam scanning angle of the antenna system is ranged from -40 to 40 with a gain loss of -3 dB as simulation result shows.