基于十字形缝隙的紧凑型圆极化器在高功率微波应用中的研究

Compact circular polarizer based on cross-shaped slot for high-power microwave applications.

作者信息

Zhao Xuhao, Yuan Chengwei, Zhang Jiande, Zhang Qiang

机构信息

College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.

出版信息

Rev Sci Instrum. 2020 Jan 1;91(1):014707. doi: 10.1063/1.5140258.

DOI:10.1063/1.5140258

PMID:32012633

Abstract

A compact high-power waveguide circular polarizer working at the C-band is presented in this paper. By introducing a split-ring slot and an orthogonally crossed rectangular slot into a circular waveguide, high transmission efficiency and 90° phase difference of two linearly polarized orthogonal TE modes are achieved by using the polarizer within a half wavelength. In the meantime, the power handling capacity of the designed polarizer is expected to be over 120 MW, which can be applied in the high-power microwave region. The designed circular polarizer is fabricated and measured by the cold test; the results of experiments and simulations agree well with each other. It is shown in the experiments that the axial ratio is less than 0.9 dB, the voltage standing-wave ratio is less than 1.2, and the conversion efficiency is over -0.15 dB at 4.2-4.4 GHz.

摘要

本文提出了一种工作在C波段的紧凑型高功率波导圆极化器。通过在圆形波导中引入裂环槽和正交交叉的矩形槽，利用该极化器在半波长范围内实现了两个线性极化正交TE模式的高传输效率和90°相位差。同时，所设计极化器的功率处理能力预计超过120兆瓦，可应用于高功率微波区域。所设计的圆极化器通过冷测进行制作和测量；实验结果与模拟结果吻合良好。实验表明，在4.2 - 4.4 GHz频段，轴比小于0.9 dB，电压驻波比小于1.2，转换效率超过 -0.15 dB。