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 of 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$\lambda$. 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 12 GHz 频率的微笑 MCA (SMCA)。由于天线截面的增加，电击穿的概率大大降低。电击穿可能发生在电磁源的高功率输出处。SMCA 的电力容量水平为 648 MW。此外，天线的长度为 0.47$\lambda$. 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。此外，E 和 H 平面的带宽均为 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。