›› 2011, Vol. 24 ›› Issue (1): 118-.

• 论文 • 上一篇    下一篇



  1. (西安电子科技大学 天线与微波技术国家重点实验室,陕西 西安 710071)
  • 出版日期:2011-01-15 发布日期:2010-12-30
  • 作者简介:冉涛(1984-),男,硕士研究生。研究方向:线天线的研究与应用,匹配网络,耦合器的应用等。

A Novel Dual-Layer Microstrip Directional Coupler

 RAN Tao, FU Guang, FAN Yi-Peng   

  1. (National Laboratory of Antennas and Microwave Technology,Xidian University,Xi'an 710071,China)
  • Online:2011-01-15 Published:2010-12-30


提出了一种新型双层微带结构的3 dB定向耦合器。此耦合器由两层带有耦合缝隙和寄生单元的介质板背对背放置。通过增加耦合面积和引入寄生单元补偿电容起到了均衡奇、偶模相速提高了耦合度,实现了宽频的3 dB紧耦合。通过优化设计,在频带范围内,此双层微带定向耦合器的定向性优于普通的耦合微带线定向耦合器。设计结果在 450~860 MHz 频带内插入损耗< 0.5 dB,端口回波损耗<-23 dB,端口隔离度≥20 dB,仿真和实测结果取得了良好的吻合。

关键词: 双层微带, 定向耦合器, 耦合系数


A novel dual-layer microstrip directional coupler is presented.The directional coupler consists of two-layer,back-to-back substrates with a couple aperture.By increasing the coupling proportion and introducing parasitical part to compensate the capacitance and poise the odd mode and even mode,it realizes tight coupling at a wide band.The directivities of the coupler is better than that of the general microstrip ones.The insertion losses,return losses and isolation are better than 0.5 dB,-23 dB and 20 dB over the bandwidth (450~860 MHz),respectively.The measurements agree well with the simulations.

Key words: dual-layer microstrip;directional coupler;coupling coefficient


  • TN751.1