X波段平板波导裂缝阵列天线设计

Design of an X-band flat waveguide slot array antenna

根据雷达总体的技术指标要求,设计了一型X波段平板波导宽边裂缝阵列天线。采用波导裂缝的经典电磁理论与电磁仿真软件相结合的方法,确定开缝波导的衰减常数,设计出具有泰勒幅度分布的波导裂缝阵列天线。该天线面阵采用4根波导整板加工,正面无遮挡,宽边同轴波导变换与天线面阵一体设计,吸收负载与波导管胶接固定。仿真结果显示,天线面阵在工作频带范围内增益优于29.5 dB,副瓣优于-28 dB。

An X-band broadside waveguide slot array antenna on the same plane is designed according to the requirements of radar technical specification.A slotted waveguide antenna is designed with Taylor amplitude distribution by using a method of combing classical electromagnetic theory with electromagnetic simulation software to determine the attenuation constant.The coax-waveguide transformer and the antenna array with 4 waveguides adopt an integrated design on the broadside,and the absorption load is glued to the waveguide.The simulation results show that the antenna gain and the sidelobe are better than 29.5 dB and-28 dB respectively in the operating band.