Coupled Microstrip-Line Bandpass Filters with Wide Upper Stopband and High Frequency Selectivity

摘要：

In this paper, a class of coupled microstrip-line bandpass filters with harmonic suppression and high selectivity are studied by exciting and utilizing the transmission zeros of parallel-coupled line sections in an inhomogeneous medium. A two-stage coupled microstrip-line bandpass filter is proposed and analyzed, and its prototype circuit is designed and fabricated to verify the proposed principle. As demonstrated in theory and experiment, two transmission zeros can be produced near the core passband so as to improve the filter selectivity and to suppress the first-order harmonic passband. In final, a three- stage bandpass filter with much wide upper stopband and frequency selectivity is designed and its predicted performance is well verified in experiment.

作者: Sha Luo Lei Zhu Sheng Sun

作者单位: School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore Institute of Microwave Techniques, University of Ulm, Germany

会议类型: 国际会议

会议名称: 2010 International Conference on Communications,Circuits and Systems(2010年通信、电路与系统国际会议)

会议地点: 成都

会议语种:英文

页码: 692-695

在线出版日期: 2010-06-28（万方平台首次上网日期，不代表论文的发表时间）