Waveguide branch couplers for tight couplings
Waveguide branch couplers for tight couplings
复制标题
DOI：
10.1109/mwsym.2000.861763
复制
发表时间：
2000-06
期刊：
影响因子：
--
通讯作者：
Tao Shen;K. Zaki;T. Dolan
中科院分区：
文献类型：
--
作者：
Tao Shen;K. Zaki;T. Dolan
从全波模拟结果中提取了波导T结的等效电路。从耦合器综合的角度解释了为什么用波导型分支耦合器很难实现紧耦合。采用全波优化设计，实现紧耦合。设计了一种3分贝的波导型分支耦合器。在23%的导波带宽上，其耦合变化在/spl plusmN/0.1db以内，回波损耗和隔离度大于40db。测量结果与计算结果吻合较好。
Waveguide T-junction equivalent circuits are extracted from full-wave modeling results. They are used to explain why tight couplings are difficult to realise using waveguide branch couplers, from the viewpoint of coupler synthesis. Full-wave optimization design is used to obtain tight couplings. A 3-dB waveguide branch coupler is designed. Its coupling variation is within /spl plusmn/0.1 dB, and its return loss and isolation are greater than 40 dB, over the 23% guide-wavelength bandwidth. Measured results are in good agreement with computed results.