X波段高功率微波选模定向耦合器

高功率、长脉冲是高功率微波技术发展的趋势，提高微波器件的功率容量成为一项重要的任务，使用过模器件可以有效提高微波源的功率容量，然而却会带来微波源中同时存在多种模式的问题。为了识别一个X波段长脉冲过模高功率微波源的输出主模TM01模式，设计了一种在线选模定向耦合器，进行了理论分析和模拟优化设计。当频率范围为9.2~9.6 GHz时，模拟结果显示该选模耦合器对TM01模的耦合度为-54 dB，在400 MHz带宽内定向性大于35 dB，对TM02模的抑制度大于15 dB，功率容量可达到3 GW以上。

X-band high power microwave mode-selective directional coupler

The development of high power microwave(HPM) technology now trends toward higher power and longer pulse, and overmoded devices are employed to increase the power handling capacity of HPM sources. In order to discriminate the dominant TM01 mode of an X-band long-pulse overmoded HPM source, a mode-selective directional coupler with stable coupling coefficient, high directivity and high power handling capacity in wide band is numerically investigated. At the central frequency range of 9.2-9.6 GHz, the simulation results show that the coupling coefficient is -54 dB, the directivity of TM01 mode is more than 35 dB, the suppression of TM02 mode is about 15 dB, and the power handling capacity is 3 GW.