W波段低旁瓣波导缝隙行波阵天线

发布时间：2019-04-24 21:37

【摘要】：针对W波段波导缝隙天线加工难度高、加工后缝隙尺寸不易修改的问题,提出了一种改进型缝隙电导函数提取方法.首先,根据工艺可实现性,设定合理的波导辐射面壁厚和缝隙宽度;然后,应用HFSS软件计算出不同缝隙切入深度和缝隙倾斜角度的缝隙电导值;最后,利用Matlab软件拟合出电导函数曲线,并进行阶梯状的分段近似,以简化加工工艺复杂度.基于优化设计结果,加工出4套天线样品,采用紧缩场测试方法对天线进行辐射方向图测量.结果表明,在75~79 GHz的频带内,天线增益均大于23.5 d Bi,E面3 d B波束宽度为1.2°,旁瓣电平低于-20 d B.当频率从75 GHz扫描至79 GHz时,E面3 d B波束覆盖范围为5.5°.4套天线的性能测试结果展现出较好的一致性,从而验证了设计方法的正确性和有效性.
[Abstract]:In order to solve the difficulty of machining W-band waveguide slot antenna and the difficulty of modifying slot size after machining, an improved slot conductance function extraction method is proposed. Firstly, according to the realization of the process, the wall thickness and slot width of the waveguide radiation surface are set reasonably, and then, the gap conductivity values of different slit depth and slot tilt angle are calculated by HFSS software. Finally, the curve of conductivity function is fitted by Matlab software, and the step-like piecewise approximation is carried out to simplify the complexity of machining process. Based on the optimized design results, four sets of antenna samples were fabricated, and the radiation pattern of the antenna was measured by the method of compact field measurement. The results show that the gain of the antenna is greater than 23.5 d Bi, E plane 3 dB beamwidth and the sidelobe level is lower than-20 dB in the frequency band of 75 / 79 GHz. When the frequency range is from 75 GHz to 79 GHz, the 3 dB beam coverage of the E plane is 5.5 掳. The performance test results of 4 sets of antennas show good consistency, thus validating the correctness and effectiveness of the design method.
【作者单位】：东南大学毫米波国家重点实验室;
【分类号】：TN823.24

【相似文献】