一种新型微带/槽线混合结构的宽带魔T  

A Novel Wide Band Magic-T Combined with Microstrip-Slotline

作　　者：高翔[1] 程崇虎[1] 

机构地区：[1]南京邮电学院无线通信与电磁兼容实验室,南京210003

出　　处：《微波学报》2005年第4期12-15,共4页Journal of Microwaves

基　　金：国家自然科学基金资助项目(60471046)

摘　　要：提出一种新型宽带平面魔T结构,该魔T基于传统的微带混合环的原理设计而成,为扩展工作频带,采用了微带-槽线混合结构,通过将槽线T接头功分器的反相输出特性与微带T接头功分器的同相输出特性相结合,从而实现两输出端口的宽带和/差输出.测量数据表明该魔T结构可实现超过25%的相对工作带宽(输入端口回波损耗低于-10dB),在工作频带(4.3～5.6GHz)内,其传输插损小于1dB,两对隔离端口的隔离度分别为-30dB和-20dB.A novel wide band planar Magic-T is presented. It is designed based on the traditional principle of microstrip hybrid ring, By employing coupling microstrip-slotline configuration, its bandwidth is improved. Microstrip-slotline Tjunction is used to achieve the in-phase and out-phase coupling characteristic. The operation bandwidth of this magic-T is from 4, 3 to 5.6 GHz centered at 5 GHz, which is over 25% for return loss lower than - 10 dB. Furthermore, it is also shown that its insertion loss is lower than 1 dB and the isolation between each port pairs are lower than - 30 dB and - 20 dB over the operation frequency band respectively.

关 键 词：平面魔T 微带线 槽线 宽带 混合结构 魔T 输出特性 工作频带 输出端口 原理设计 

分 类 号：TN817[电子电信—信息与通信工程]