Tri-band bandpass filter based on coupled stepped impedance resonators

doi:10.1016/S1005-8885(15)60694-X

Acta Metallurgica Sinica(English letters) ›› 2015, Vol. 22 ›› Issue (6): 57-60.doi: 10.1016/S1005-8885(15)60694-X

• Electromagnetic Field and Microwave Technologies • 上一篇下一篇

Tri-band bandpass filter based on coupled stepped impedance resonators

张旭东¹,张洪欣²,贺鹏飞³

1. School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China 2. Beijing Key Laboratory of Work Safety Intelligent Monitoring, Beijing University of Posts and Telecommunications, Beijing 100876, China 3. School of Opto-Electronic Information Science and Technology, Yantai University, Yantai 264005, China

收稿日期:2015-07-01 修回日期:2015-11-19 出版日期:2015-12-31 发布日期:2015-12-30
通讯作者: 张旭东 E-mail:zxdpqh@163.com
基金资助:
This work was supported by the National Natural Science Foundation of China (61571063, 61202399, 61501100).

Tri-band bandpass filter based on coupled stepped impedance resonators

Zhang Xudong¹,Zhang Hongxin²,He Pengfei³

1. School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China 2. Beijing Key Laboratory of Work Safety Intelligent Monitoring, Beijing University of Posts and Telecommunications, Beijing 100876, China 3. School of Opto-Electronic Information Science and Technology, Yantai University, Yantai 264005, China

Received:2015-07-01 Revised:2015-11-19 Online:2015-12-31 Published:2015-12-30
Supported by:
This work was supported by the National Natural Science Foundation of China (61571063, 61202399, 61501100).

摘要/Abstract

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.

关键词: tri-band bandpass filter, microstrip, stepped impedance resonator, cross-coupled

Abstract: 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.

Key words: tri-band bandpass filter, microstrip, stepped impedance resonator, cross-coupled

Zhang Xudong, Zhang Hongxin, He Pengfei. Tri-band bandpass filter based on coupled stepped impedance resonators [J]. Acta Metallurgica Sinica(English letters), 2015, 22(6): 57-60.

Tri-band bandpass filter based on coupled stepped impedance resonators

Tri-band bandpass filter based on coupled stepped impedance resonators

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