Ka波段大型单脉冲平板缝隙天线的分析与设计

论文所分析的Ka波段平板缝隙阵列天线具有阵面尺寸大(534.89mm×494.3mm)、缝隙多(5 120)的特点,因而对于阵面的设计运用优化总体设计,并运用等效电路法结合电磁仿真软件HFSS得到精确的辐射缝以及耦合缝参数。同时为了减小加工难度,对天线分象限分层分象限进行加工。经过实测验证,测试结果与理论吻合良好,在±300MHz频带范围内驻波小于2,整个阵面的增益均大于42dB,天线的方位副瓣电平达到-22.8dB,俯仰副瓣电平达到-23.8dB,零值深度在俯仰和方位均达到-30dB。

Analysis and Design of Ka-band Monopulse Large Waveguide Longitudinal Slot Array Antenna

According to the manufacturing difficulty of MMW slotted waveguide longitudinal array antenna,the whole array including slots of 5 120,and the area was 534.89 mm×494.3 mm.the antenna parameters were designed accurately by optimizing whole design method and extracting impedance data of coupling slots,etc.Then we used the equivalent circuit of slotted array antenna.and obtained parameters with electromagnetic field simulator HFSS.In order to reduce the difficulty of processing,the antenna ues sub-quadrant layered and stratification process.After the actual test,the test results are in good agreement with the theoretical.In the working frequency band the VSWR all less than 2,the Gain of the whole array were above 42 dB,The Azimuth plane SLL could reach to-22.8 dB,The elevation plane SLL coulde reach to-23.8 dB,The zero depth in the azimuth and elevation plane all reach to-30 dB.