一种超宽带宽边耦合微带定向耦合器  

Design of a UWB Microstrip Directional Coupler Based on Broadside Coupling Theory

作　　者：杨自强[1] 郭峥[2] 陈涛[1] 杨涛[1] 刘宇[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731 [2]西南电子设备研究所,四川成都610036

出　　处：《压电与声光》2013年第5期746-748,共3页Piezoelectrics & Acoustooptics

基　　金：中央高校基本科研业务费基金资助项目(ZYGX2010J026);自然科学基金青年科学基金资助项目(61006026)

摘　　要：提出了一种新颖的超宽带宽边耦合微带定向耦合器,相比窄边耦合结构,宽边耦合增加了耦合面积,可实现宽频的3dB紧耦合。同时,为进一步拓展耦合器工作带宽,该文采用渐变耦合结构替代传统的矩形耦合结构。通过HFSS仿真验证,此定向耦合器在2～6GHz频带内插入损耗小于0.9dB,输入端口回波损耗大于20dB,端口隔离度大于21dB。This paper describes a novel ultra-wideband microstrip directional coupler, which adopts a broadside coupling theory. Compared with the narrow coupling structure, broadside coupling structure can increase coupling area and realize 3 dB tight coupling in a wide frequency range. In order to further expand the operating bandwidth of the coupler, this paper uses tapered coupling structure instead of the traditional rectangular couping structure. The HFSS simulation results show that the insertion loss of the directional coupler is less than 0.9 dB, the return loss at the input port is more than 21 dB and the isolation at port is more than 20 dB across 2 GHz to 6 GHz.

关 键 词：超宽带 微带线 宽边耦合 渐变 

分 类 号：TN73[电子电信—电路与系统]