New Compact Triple-Passband Bandpass Filter Using Multipath-Embedded Stepped Impedance Resonators

Author

Hung-Wei Wu ; Guan-Syun Chen ; Yung-Wei Chen

Author_Institution

Dept. of Comput. & Commun., Kun Shan Univ., Tainan, Taiwan

Volume

24

Issue

3

fYear

2014

fDate

Mar-14

Firstpage

158

Lastpage

160

Abstract

This letter presents a new resonator configuration to design a triple-passband filter with high passband selectivity and compact circuit size. The filter includes two multipath-embedded stepped impedance resonators (SIRs), connected with magnetically coupling by via hole technique at the symmetric plane of the filter. The multipath-embedded SIR is designed at 1.575, 2.45, and 3.5 GHz. The resonant frequencies can be easily controlled by tuning impedance ratio K i and length ratio αi (where i = 1, 2, and 3) of the multipath-embedded SIR. This study provides an effective method to easily design the triple-passband filter with compact circuit size, high passband selectivity and low insertion loss.

Keywords

UHF filters; UHF resonators; band-pass filters; resonator filters; compact circuit size; compact triple-passband bandpass filter; frequency 1.575 GHz; frequency 2.45 GHz; frequency 3.5 GHz; high passband selectivity; hole technique; length ratio; low insertion loss; magnetically coupling; multipath-embedded SIR; multipath-embedded stepped impedance resonators; resonant frequency; resonator configuration; symmetric plane; triple-passband filter; tuning impedance ratio; Couplings; Filtering theory; Impedance; Insertion loss; Passband; Resonant frequency; Wireless communication; Bandpass filter (BPF); multipath; stepped impedance resonator (SIR); triple-passband;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2013.2293652

Filename

6710200