Novel dual mode microstrip bandpass-filter [Technical Committee]

Author

Hettstedt, Falk ; Lehmann, Thomas ; Knoechel, Reinhard

Author_Institution

Christian-Albrechts-Univ. of Kiel, Kiel

Volume

10

Issue

1

fYear

2009

fDate

2/1/2009 12:00:00 AM

Firstpage

155

Lastpage

157

Abstract

A novel four-pole, dual-mode bandpass filter is presented. It is based on microstrip meandered ring resonators, where dual-mode resonances are utilized through well-placed discontinuities in the symmetry plane of the ring structure. These filter types show very compact size, low insertion loss, and high stopband attenuation as well as steep filter slopes. The investigation was carried out within the student paper contest "Packaged X-Band Filter" at IMS 2008. Therefore, the passband is defined between 7.145--7.235 GHz, while the insertion loss is less than 5 dB and the return loss exceeds 15 dB. Between 8.4--8.5 GHz, the stopband attenuation should exceed 45 dB. This article presents the filter construction and simulation results. The integration into the given package as well as measurement results are presented.

Keywords

band-pass filters; microstrip filters; microwave filters; resonator filters; dual-mode bandpass-filter; dual-mode resonances; filter compact size; frequency 7.145 GHz to 7.235 GHz; frequency 8.4 GHz to 8.5 GHz; insertion loss; microstrip meandered ring resonators; ring structure; steep filter slopes; stopband attenuation; Attenuation; Band pass filters; Conductors; Insertion loss; Microstrip resonators; Optical ring resonators; Packaging; Passband; Resonance; Resonator filters;

fLanguage

English

Journal_Title

Microwave Magazine, IEEE

Publisher

ieee

ISSN

1527-3342

Type

jour

DOI

10.1109/MMM.2008.930756

Filename

4754025