光子晶体高功率微波模式转换器设计

Design of a metallic photonic crystal high power microwave mode converter

研究了传输线中非截面排列金属光子晶体电磁特性,并利用其作为移相器提出了一种紧凑型TEM—TE11模式转换器的设计方法.利用电磁软件cst microwave studio优化设计了一套L波段TEM—TE11模式转换器,在中心频率1.58 GHz上转换效率为98%.在1.56—1.625 GHz频率范围内,模式转换器转换效率大于90%,对应带宽4.1%.模式转换器功率容量为GW级,适用于高功率微波源系统.结合磁绝缘线振荡器开展了粒子模拟研究工作,发现模式转换器性能与设计结果相符,并且其引入不影响高功率微波器件的正常工作.

Electromagnetic properties of a two-dimensional metallic photonic crystal in a transmission line is analyzed,and a compact TEM-TE11 high-power microwave mode converter which takes this type of sturcture for phase-shiftting is presented.An L band TEM-TE11 mode converter is optimized using the commercial software cst microwave studio.Its conversion efciency is 98% at the center frequency of 1.58 GHz.Over the frequency range of 1.56–1.625 GHz,the conversion efciency exceeds 90%,with a corresponding bandwidth of 4.1%.This mode converter has a gagawatt level power handling capability,thus it is suitable for narrow band high-power microwave application.Using magnetically insulated transmission line oscillator as a high-power microwave source,particle-in-cell simulation is carried out to test the performance of the mode converter.It is found that the proposed mode converter works well with this narrow band high power microwave device.