Sun Yunfei, He Juntao, Yuan Chengwei, Zhang Qiang, Dang Fangchao
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, People's Republic of China.
Rev Sci Instrum. 2019 Jan;90(1):014709. doi: 10.1063/1.5082581.
A novel phase shifter used to adjust the output phase of high power microwave (HPM) is investigated. The phase shifter is composed of two different circular polarizers, one of which can convert the coaxial transverse electromagnetic mode (TEM) into circularly polarized (CP) TE mode, and the other one can realize the transformation between the CP TE mode and the rectangular TE mode. The two circular polarizers are connected by a circular waveguide, and the TEM-TE circular polarizer can rotate around its axis continuously. In this way, the phase shifter can adjust the output phase of the TE mode in the range of 0°-360°. In this paper, the principle of a phase shifter working at 1.57 GHz, as well as the experimental results, is demonstrated. The experimental and simulation results are in good agreement. At the central frequency, the transmission efficiency in this range of phase-shifting process is over 94.6%, and the power-handling capacity is as high as 1.5 GW. This novel phase shifter is of interest to HPM spatial power combination technologies.
研究了一种用于调节高功率微波（HPM）输出相位的新型移相器。该移相器由两个不同的圆极化器组成，其中一个可将同轴横向电磁模式（TEM）转换为圆极化（CP）TE模式，另一个可实现CP TE模式与矩形TE模式之间的转换。两个圆极化器通过圆形波导连接，TEM-TE圆极化器可绕其轴连续旋转。通过这种方式，移相器可在0°至360°范围内调节TE模式的输出相位。本文展示了工作在1.57 GHz的移相器原理以及实验结果。实验和仿真结果吻合良好。在中心频率处，该移相过程范围内的传输效率超过94.6%，功率处理能力高达1.5 GW。这种新型移相器对高功率微波空间功率合成技术具有重要意义。
