摘要
提出了一种基于矩形波导内磁场耦合原理的波导-微带过渡转换电路结构,该结构利用矩形波导内E面微带基片上的环形金属条带电路、一段部分填充介质的内矩外矩的偏心同轴线,实现矩形波导和微带线两者主模之间电磁场的模式过渡转换,该转换电路具有插入损耗小、频带宽、结构紧凑、免调试等特点。用CST仿真软件,在Ka频段上对该过渡转换电路进行了仿真设计,实物测试结果表明:一对背靠背的该过渡转换电路,在29～40GHz的频段范围内,插入损耗S21小于1.2dB,回波损耗S11优于-15dB。
A novel circuit construction of rectangular waveguide-microstrip transition based on the principle of magnetic field coupling in rectangular waveguide is proposed in the paper.The circuit construction is composed of a ring metal strip on microstrip substrate placed in the E plane of rectangular waveguide,and a section of decentre coaxial-line partial filled medium.Inside and outside conductors of the coaxial-line are all rectangular.The circuit construction achieves a good conversion of master modes from rectangular waveguide to microstrip.It has the advantages of low insertion loss,wide frequency band,compact structure and avoiding debug,etc.The transition circuit is designed and simulated at Ka band by using CST simulation software.The measured results show the insertion loss of the back-to-back transition is less than 1.2 dB and the return loss is better than-15dB in the frequency range of 29～40GHz.
出处
《微波学报》
CSCD
北大核心
2010年第6期81-84,共4页
Journal of Microwaves
关键词
磁耦合
KA频段
波导
微带
过渡转换
Magnetic coupling
Ka band
Waveguide
Microstrip
Transition
