Novel compact dual-band bandpass filter with multiple transmission zeros and good selectivity

Author

Doan, MinhTan ; Che, Wenquan ; Feng, Wenjie

Author_Institution

Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China

Volume

5

fYear

2012

fDate

5-8 May 2012

Firstpage

1

Lastpage

4

Abstract

A novel compact microstrip dual-band bandpass filter (BPF) using short-stub loaded half-wavelength resonator with multiple transmission zeros and good selectivity is proposed in this letter. The characteristics of the dual-mode resonator are investigated by using even-odd mode analysis. To improve filter selectivity, a new structure of hook feed line of couple-line is introduced to produce six transmission zeros at the adjacent two passbands. A prototype of dual-band bandpass filter for WLAN (2.4 GHz) and WiMAX (3.5 GHz) applications is designed and fabricated for demonstration. Good agreement is observed between the measured and the theoretical expectation.

Keywords

WiMax; antenna feeds; band-pass filters; microstrip filters; resonator filters; wireless LAN; WLAN; WiMAX; adjacent two passbands; compact microstrip dual-band bandpass filter; couple-line; dual-mode resonator; even-odd mode analysis; frequency 2.4 GHz; frequency 3.5 GHz; hook feed line; multiple transmission zeros; short-stub loaded half-wavelength resonator; Band pass filters; Dual band; Feeds; Filtering theory; Passband; Resonant frequency; Resonator filters; Dual-band bandpass filter; fractional bandwidth; multiple transmission zeros; short-stub loaded half-wavelength resonator;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology (ICMMT), 2012 International Conference on

Conference_Location

Shenzhen

Print_ISBN

978-1-4673-2184-6

Type

conf

DOI

10.1109/ICMMT.2012.6230401

Filename

6230401