A Wide Stopband Branch-Line Coupler Using Defected Ground Structure

摘要：

This paper presents a novel branch-line coupler which has a wide stopband characteristic with attenuation 30 dB from 4 GHz to 8 GHz using defected ground structure (JOGS). The conventional branch-line coupler suffers from the presence of spurious response at odd harmonics of the operating frequency. The proposed coupler adopts the two symmetrical dumbbell DGS under the input and output feed lines to suppress the harmonic components. To verify the proposed structure, both simulated results of the conventional and proposed branch-line coupler are presented. It demonstrates that the proposed structure has a high harmonic suppression. Moreover, it produces a much wider passband bandwidth compared with the conventional coupler design. The measured results show good agreement with the simulated results.

作者: Jian-Zhao Tong Xiao-Qun Chen Xiao-Wei Shi Lei Chen Hao-Jia Lin

作者单位: National Key Laboratory of Science and Technology on Antennas and Microwaves Xidian University Xian, Shaanxi 710071 P. R. China

会议类型: 国际会议

会议名称: 2010 International Conference on Microwave and Millimeter Wave Technology(2010国际微波与毫米波技术会议 ICMMT2010)

会议地点: 成都

会议语种:英文

页码: 66-69

在线出版日期: 2010-05-08（万方平台首次上网日期，不代表论文的发表时间）