A compact wideband bandpass filter with harmonic suppression using fork-shape resonators and SIS

Author

Wei, Lin ; Chen, Hui ; Zhong, Hong-sheng ; Zhao, Zhi-qin ; Zhang, Yu-xing

Author_Institution

Aviation Eng. Inst., Civil Aviation Flight Univ. of China, Guanghan, China

Volume

2

fYear

2012

fDate

5-8 May 2012

Firstpage

1

Lastpage

3

Abstract

A new and miniature wide-band bandpass filter (BPF) with 2nd harmonic-suppressed characteristic is proposed in this letter. This designed filter consists of two cascading folded fork-shape resonators paralleled with an open-ended stepped impedance stub (SIS). The harmonic-suppressed filter has been designed, fabricated, and measured. The measurement results are in good agreement with the electromagnetic (EM) simulation results. The obtained frequency responses demonstrated the filter with an excellent band-pass property, including -3 dB fractional bandwidth (FBW) 45% at the central frequency 2.2 GHz, less than 1.4 dB insertion loss within the passband, and broad stopband rejection.

Keywords

band-pass filters; resonators; SIS; band-pass property; broad stopband rejection; compact wideband bandpass filter; electromagnetic simulation; fork-shape resonator; frequency 2.2 GHz; harmonic suppression; miniature wide-band bandpass filter; open-ended stepped impedance stub; passband rejection; second harmonic-suppressed characteristic; Band pass filters; Filtering theory; Microstrip filters; Microwave filters; Resonant frequency; Resonator filters; Transmission line measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology (ICMMT), 2012 International Conference on

Conference_Location

Shenzhen

Print_ISBN

978-1-4673-2184-6

Type

conf

DOI

10.1109/ICMMT.2012.6230038

Filename

6230038