Differential Wideband Bandpass Filter With High-Selectivity and Common-Mode Suppression

Author

Xiao-Hu Wu ; Qing-Xin Chu ; Lei-lei Qiu

Author_Institution

Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

Volume

23

Issue

12

fYear

2013

fDate

Dec. 2013

Firstpage

644

Lastpage

646

Abstract

A circuit for differential wideband bandpass filter (BPF) is presented. The circuit works as a bandpass and bandstop filter under differential- and common-mode excitation, respectively. Under differential-mode, two transmission zeros are generated by the short-ended parallel-coupled stubs and supply a very sharp differential passband. The circuit parameters are analyzed and given to show the circuit characteristics. Finally, the circuit is implemented using microstrip technology and a differential wideband BPF is designed, simulated and measured. Simulated and measured results are well agreed.

Keywords

band-pass filters; band-stop filters; microstrip filters; BPF; bandstop filter; common-mode excitation; common-mode suppression; differential passband; differential wideband bandpass filter; differential-mode excitation; microstrip technology; short-ended parallel-coupled stubs; transmission zeros; Band-pass filters; Filtering theory; Frequency measurement; Microstrip filters; Passband; Wideband; Bandpass filter (BPF); bandstop filter (BSF); common-mode; differential-mode; selectivity; wideband;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2013.2284787

Filename

6645458