Compact tri-band bandpass filter using embedded resonators with multiple transmission zeros

Author

MinhTan Doan ; Quoc Trinh Do ; Van Ha Tran

Author_Institution

Dept. of Radio Electron. Eng., Le Qui Don Tech. Univ., Hanoi, Vietnam

fYear

2012

fDate

10-12 Oct. 2012

Firstpage

345

Lastpage

348

Abstract

A compact microstrip tri-band bandpass filter (BPF) using the embedded open stubs loaded resonator is presented. The center frequencies of the first and the third passband can be conveniently controlled by tuning the dimensions of the short stub and open stubs, whereas the second passband frequency is fixed. Moreover, the filter has been implemented with multi-transmission zeros to improve the selectivity. To verify the proposed approach, a prototype of tri-band BPF centred at 2.4/3.5/5.2 GHz for WLAN/WiMAX applications is designed and fabricated. Measured results agree well with simulated ones.

Keywords

UHF filters; WiMax; band-pass filters; microstrip filters; microwave filters; wireless LAN; WLAN/WiMAX applications; compact microstrip tri-band bandpass filter; embedded open stubs; embedded resonators; frequency 2.4 GHz; frequency 3.5 GHz; frequency 5.2 GHz; loaded resonator; multiple transmission zeros; second passband frequency; short stub; Loss measurement; Switches; Tri-band bandpass filter; fractional bandwidth; short stub loaded half-wavelength resonator;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Technologies for Communications (ATC), 2012 International Conference on

Conference_Location

Hanoi

ISSN

2162-1020

Print_ISBN

978-1-4673-4351-0

Type

conf

DOI

10.1109/ATC.2012.6404290

Filename

6404290