Design of compact dual-band bandpass filter using dual-mode stepped-impedance stub resonators

Author

Shuai Yang ; Lei Lin ; Jianzhong Chen ; Kun Deng ; Chang-Hong Liang

Author_Institution

Nat. Lab. of Sci. & Technol. on Antennas & Microwaves, Xidian Univ., Xi´an, China

Volume

50

Issue

8

fYear

2014

fDate

April 10 2014

Firstpage

611

Lastpage

613

Abstract

A dual-band bandpass filter (BPF) using a novel stepped-impedance stub resonator (SISR) is presented. The proposed SISR is found to have the advantage that the even-mode resonant frequencies can be flexibly controlled, whereas the odd-mode resonant frequencies are fixed. Based on the proposed SISR, a dual-band filter is implemented by tuning its geometric parameters. To improve the selectivity, a filter with four transmission zeros on either side of both passbands is designed by introducing a 0° feeding structure. A prototype of a dual-band BPF centred at 1.84 and 2.65 GHz has been designed and fabricated. The measured results validate the full-wave EM simulated results.

Keywords

UHF filters; band-pass filters; resonator filters; compact dual band band-pass filter; dual mode stepped impedance stub resonators; even mode resonant frequency; feeding structure; frequency 1.84 GHz; frequency 2.65 GHz; full wave electromagnetic simulation; odd mode resonant frequency;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2013.4217

Filename

6802213