Compact UWB bandpass filter using ring open stub loaded multiple-mode resonator

Author

Zhou, Y. ; Yao, B. ; Cao, Q. ; Deng, H. ; He, X.

Author_Institution

Coll. of Inf. Sci. & Technol., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing

Volume

45

Issue

11

fYear

2009

Firstpage

554

Lastpage

556

Abstract

A novel ultra-wideband (UWB) bandpass filter with a compact size, improved upper-stopband performance and reduced radiation loss has been studied and designed using a multiple-mode resonator (MMR). The MMR is formed by attaching three pairs of ring open stubs in shunt to a high impedance microstrip line. By simply adjusting the radius of the circles of the ring stubs, the resonant modes of the MMR can be roughly allocated within the 3.1-10.6 GHz UWB band while suppressing the spurious harmonics in the upper-stopband. Meanwhile, the insertion loss is higher than 20.0 dB in the upper-stopband from 11.7 to 33.5 GHz in simulation. Finally, the filter is fabricated and measured. The EM-simulated and measured results are presented and excellent agreement between them is obtained.

Keywords

band-pass filters; microstrip filters; microstrip resonators; microwave filters; resonator filters; ultra wideband technology; UWB bandpass filter; filter fabrication; frequency 11.7 GHz to 33.5 GHz; frequency 3.1 GHz to 10.6 GHz; high impedance microstrip line; insertion loss; radiation loss; resonant mode; ring open stub loaded multiple-mode resonator; spurious harmonics; ultra-wideband bandpass filter;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2009.3724

Filename

4976877