Tri-band bandpass filter based on coupled stepped impedance resonators  

作　　者：Zhang Xudong Zhang Hongxin He Pengfei 

机构地区：[1]School of Electronic Engineering, Beijing University of Posts and Telecommunications [2]Beijing Key Laboratory of Work Safety Intelligent Monitoring, Beijing University of Posts and Telecommunications [3]School of Opto-Electronic Information Science and Technology, Yantai University

出　　处：《The Journal of China Universities of Posts and Telecommunications》2015年第6期57-60,共4页中国邮电高校学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (61571063, 61202399, 61501100)

摘　　要：A novel tri-band bandpass filter （BPF） is proposed by using cross-coupled stepped impedance resonators （SIRs）, which can operate at 2.4 GHz, 3.5 GHz and 5.25 GHz respectively. In engineering application, it is suitable for wireless local area network （WLAN） and worldwide interoperability for microwave access （WiMAX）. In addition, the passband of this filter can be easily controlled by changing the electrical parameters of the resonators. So it is helpful to the selection of passband in engineering applications. For in-depth analysis, the equivalent circuit of the filter is also proposed. At last, it shows that the measured results agree well with the simulated results. The insertion loss of the filter within each passband is less than 1.9 dB, meanwhile two transmission zeros are obtained which can be able to meet the engineering requirements.A novel tri-band bandpass filter （BPF） is proposed by using cross-coupled stepped impedance resonators （SIRs）, which can operate at 2.4 GHz, 3.5 GHz and 5.25 GHz respectively. In engineering application, it is suitable for wireless local area network （WLAN） and worldwide interoperability for microwave access （WiMAX）. In addition, the passband of this filter can be easily controlled by changing the electrical parameters of the resonators. So it is helpful to the selection of passband in engineering applications. For in-depth analysis, the equivalent circuit of the filter is also proposed. At last, it shows that the measured results agree well with the simulated results. The insertion loss of the filter within each passband is less than 1.9 dB, meanwhile two transmission zeros are obtained which can be able to meet the engineering requirements.

关 键 词：tri-band bandpass filter MICROSTRIP stepped impedance resonator cross-coupled 

分 类 号：TN713[电子电信—电路与系统] TN713.5