摘要
设计了一种适用于L波段高功率微波辐射场测量的同轴型定向耦合器。分别选择同轴线和金属底板共面波导（CBCPW）作为主副传输线，减小定向耦合器横截面积；利用小孔耦合理论和微元法对耦合结构进行理论分析，选择连续渐变的菱形耦合缝隙，缩短定向耦合器长度；采用数值模拟的方法对耦合器结构进行优化，并对其性能参数进行实验测试，结果表明，在1～2GHz频带范围内耦合度约为47dB，方向性大于17dB。
A novel coaxial directional coupler was designed for L-band high power microwave radiation field measurement. It could incredibly decrease the size of the coupler to use two different kinds of transmission lines and coupling aperture with continu- ous variation width along the propagation direction. The aperture is determined by infinitesimal method, small hole coupling for- mulas and numerical full wave simulation optimization. Based on the simulation results, the structure of the coupler is optimized and fabricated, and the measurement results indicate that, the size of the directional coupler is 150 mm× 46 mm× 55 mm, and during 1-2 GHz, the coupling is 47 dB, the directivity is more than 17 dB.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第10期2659-2662,共4页
High Power Laser and Particle Beams
关键词
高功率微波
同轴定向耦合器
共面波导
菱形缝隙
L波段
high power microwave
coaxial directional coupler
coplanar waveguide
diamond aperture
L-band
