一种带状线定向耦合器场分布的求解  

Solution of field distribution in stripline directional coupler

作　　者：石德万[1] 王文祥[1] 宫玉彬[1] 魏彦玉[1] 

机构地区：[1]电子科技大学物理电子学院

出　　处：《强激光与粒子束》2007年第6期947-950,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(60401005;60532010);教育部优秀人才支持计划;四川省青年基金资助课题(03QZ026-58)

摘　　要：通过两次利用Schwarz-Christoffel变换函数,先把理想的带状线变换到实轴上,然后再变换成为平板电容器,得到与两次变换过程相对应的两个变换函数,从而根据复合函数的性质,求出波导-带状线-同轴线型定向耦合器中的场分布。再根据小孔耦合理论,导出了耦合度、方向性的计算公式。最后对耦合度的理论计算结果与实际测试数据进行了对比,两者仅相差1.04 dB,吻合得很好。In design of the waveguide-stripline-coaxial line directional coupler, the solution of the field distribution in the stripline is essential. Using the Schwarz-Christoffel transformation function, the perfect stripline is transformed into a parallelplate capacitor, and the field distribution in the stripline is derived. The coupling coefficient, directivity and the relationships between coupling coefficient and geometric dimension are obtained by the coupling theory of small hole. The comparison between the calculated coupling coefficient and the measured one of couplers manufactured by us shows little difference as 1.04 dB.

关 键 词：高功率微波 定向耦合器 保角变换 带状线 耦合度 方向性 

分 类 号：TN622[电子电信—电路与系统]