Compact dual-band bandpass filter using coupled three-line microstrip structure with open stubs

Author

Sun, Zhengyu ; Zhang, Lijun ; Yan, Yuepeng ; Yang, Hongwen

Author_Institution

Inst. of Microelectron., Beijing, China

fYear

2011

fDate

1-3 Nov. 2011

Firstpage

392

Lastpage

395

Abstract

This paper presents a novel dual-band bandpass filter (DBBPF). Three open-stubs have been attached to a symmetrical coupled three-line microstrip structure. By implementing Richards´ transform and Kuroda´s identities, a compact DBBPF is obtained from a third-order prototype bandpass filter (BPF). A wideband DBBPF with central frequencies of 1.57-GHz (GPS) and 5.25-GHz (ISM) is designed and fabricated. The measured results agree well with the simulations.

Keywords

UHF filters; band-pass filters; microstrip couplers; microstrip filters; microstrip lines; microwave filters; transforms; Kuroda identity; Richard transform; compact DBBPF; compact dual-band bandpass filter; frequency 1.57 GHz; frequency 5.25 GHz; open stub; symmetrical coupled three-line microstrip structure; third-order prototype BPF; third-order prototype bandpass filter; wideband DBBPF; Band pass filters; Dual band; Filtering theory; Finite element methods; Microwave filters; Resonator filters; Transversal filters; dual-band bandpass filter (DBBPF); open-stubs; symmetrical coupled three-line microstrip structure;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave, Antenna, Propagation, and EMC Technologies for Wireless Communications (MAPE), 2011 IEEE 4th International Symposium on

Conference_Location

Beijing

Print_ISBN

978-1-4244-8265-8

Type

conf

DOI

10.1109/MAPE.2011.6156279

Filename

6156279