波导窄边斜缝行波阵列天线设计

为了快速设计波导窄边斜缝行波阵列天线,采用理论计算结合软件仿真的方法。利用电磁仿真软件HFSS模拟实验过程,得到裂缝电导函数。初始设计完成后,比较仿真结果口径分布和理论口径分布的差异,微调裂缝尺寸参数使天线口面幅度逼近设计值。设计了一个47阵元行波线阵,并采用两根波导对称放置抑制交叉极化。Taylor综合副瓣值为-30 dB,仿真得到的最大副瓣值为-24.8 dB,波瓣宽度为2.2°,增益为24.6 dB。

Design of waveguide narrow-side inclined slot non-resonant array antenna

Theoretical computation and software simulation are combined to design waveguide narrow-side inclined slot non-resonant array antenna quickly. The electromagnetic simulation software HFSS is used to simulate the experimentation for getting the slot conductance function. After the initial design,the inclination angles and depth of the slots are adjusted to make actinal surface amplitude of the antenna approach the design value according to the difference got by comparing the simulated field dis-tribution with the theoretical distribution. A non-resonant linear array antenna with 47 array elements was designed. Another slot array was placed symmetrically to restrain the cross polarization. The simulated max side lobe is -24.8 dB while Taylor compre-hensive side lobe is -30 dB. The HPBW is 2.2＆#176; and the gain is 24.6 dB.