一种新型微带/槽线混合结构的宽带魔T

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 Magic-T Combined with Microstrip-Slotline

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 T-junction 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.