ABSTRACT

This paper investigates the design, simulation, fabrication, and measurement of a compact mode converter antenna (MCA). The smile-like MCA (SMCA), at 12 GHz frequency, is designed. Due to the increase in the antenna cross-section, the probability of the electrical breakdown is dramatically reduced. Electrical breakdown may occur at very high power outputs of the electromagnetic sources. The power capacity level of the SMCA is 648 MW. Also, the length of the antenna is 0.47 λ. Simulation results indicate 99% mode conversion efficiencies. The return loss is −22 dB, the gain is more than 19 dB, and the sidelobe level is less than −37 dB. Also, the bandwidth is 200 MHz, for both E and H planes. The maximum main lobe deviation from the bore-sight is less than 0.2°. The simulation results are in good agreement with the measurement results.

摘要

本文研究了紧凑模式转换器天线（MCA）的设计，仿真，制造和测量。设计了笑脸般的MCA（SMCA），频率为12 GHz。由于天线横截面的增加，电击穿的可能性大大降低。电击穿可能会在电磁源的非常高的功率输出下发生。SMCA的功率容量级别为648 MW。另外，天线的长度是0.47λ。仿真结果表明模式转换效率为99％。回波损耗为−22 dB，增益大于19 dB，旁瓣电平小于−37 dB。同样，对于E和H平面，带宽均为200 MHz。与视轴的最大主瓣偏差小于0.2°。仿真结果与测量结果吻合良好。