UWB bandpass filter with sharp rejection and narrow notched band

Author

Xianhong Chen ; Lijun Zhang ; Yatao Peng

Author_Institution

Inst. of Microelectron., Beijing, China

Volume

50

Issue

15

fYear

2014

fDate

July 17 2014

Firstpage

1077

Lastpage

1079

Abstract

A novel ultra-wideband (UWB) bandpass filter with sharp rejection and a narrow notched band is presented. This filter is designed using a multiple-mode resonator (MMR) which consists of a ring resonator and a stepped-impedance stub. The MMR has six resonance frequencies and three transmission zeros (TZs). All three TZs are close to the resonance frequencies, thus creating sharp roll-off and narrow notched bands. Different passband bandwidths and notched bands can be obtained by tuning the stepped-impedance admittance ratios. The simulated and measured results demonstrate that this simple bandpass filter has 97.3 and 30.6 dB/GHz attenuation slope at the lower and upper transition bands, respectively. The 3 dB notched band is from 5.6 to 5.8 GHz with 10.3 dB insertion loss at 5.7 GHz.

Keywords

band-pass filters; microwave filters; notch filters; resonator filters; ultra wideband technology; MMR; TZ; UWB bandpass filter; frequency 5.6 GHz to 5.8 GHz; gain 3 dB; loss 10.3 dB; multiple-mode ring resonator; narrow notched band; sharp rejection band; sharp roll-off band; stepped-impedance admittance ratio; stepped-impedance stub; transmission zero; ultrawideband bandpass filter;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2014.1420

Filename

6856352