A UWB bandpass filter using slotline ring resonator with a notched band

Author

Zhu, H. ; Chu, Q.X. ; Tian, X.K.

Author_Institution

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

Volume

5

fYear

2012

fDate

5-8 May 2012

Firstpage

1

Lastpage

4

Abstract

A quadruple-mode UWB bandpass filter is presented. The proposed filter is comprised of a slotline ring resonator, which forms an ultra-wide passband with four resonant modes. Two pairs of defected ground patches are added to improve the desired passband. To achieve a wide upper stopband, a pair of defected ground dumbbell units is introduced. Moreover, a notch band is added around 5.5GHz using a U-shaped slotline to avoid wireless local-area network (WLAN) signals. Finally, a filter is fabricated and tested. Simulated and measured results are in good agreement to exhibit that the proposed UWB BPF has a passband from 3.1GHz to 10.9GHz with a notched band in 5.5GHz, and a wide upper stopband with attenuation level of -12.8 dB up to over 30GHz.

Keywords

band-pass filters; defected ground structures; microwave filters; notch filters; resonator filters; slot line components; ultra wideband technology; U-shaped slotline; UWB BPF; WLAN signals; defected ground dumbbell unit pair; defected ground patches; frequency 3.1 GHz to 10.9 GHz; notched band; quadruple-mode UWB bandpass filter; resonant modes; slotline ring resonator; ultrawide passband; wide upper stopband; wireless local-area network; Band pass filters; Low pass filters; Microstrip filters; Microwave filters; Passband; Resonator filters; Slotline;

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.2012.6230404

Filename

6230404