铁电体移相器高功率微波应用研究

为拓展高功率微波阵列天线的波束扫描范围, 将铁电体移相器引入到高功率微波领域。分析铁电体移相器的工作原理, 并研究其应用于高功率微波领域可能遇到的问题, 利用时域有限差分法对高功率微波在铁电体材料中传播的简单模型进行分析, 研究了微波功率及偏置电场对输出波形的影响, 并进一步分析铁电体移相器应用于高功率微波领域的可行性。结果表明:在不考虑介质损耗的情形下, 选择适当的铁电体材料可以在10 cm内实现L波段180相移, 同时传输效率达到90%以上。

Ferroelectric phase shifter for high-power microwave application

The ferroelectric phase shifter is studied for high-power microwave in order to expand beam scanning range. The operating principle of the ferroelectric-lens phase-scanning antenna is briefly introduced and several problems are discussed for high-power microwave application. The high-power microwave propagation in ferroelectrics is analyzed by means of finite difference time domain. In the end, the conclusion about the feasibility of ferroelectric phase shifter applying for high-power microwave is given. The results show that a phase shift of 180 can be achieved in this phase shifter with a length of 10 cm and the transmission efficiency is above 90% without dielectric loss at L wave band.