A resistor-loaded microstrip line resonator with a punched hole structure for ultra-wide-stopband bandpass filters

Author

Uchida, Hiromitsu ; Komaru, Ryota ; Hangai, Masatake ; Nakayama, Masatoshi ; Hirano, Yoshihito

Author_Institution

Inf. Technol. R&D Center, Mitsubishi Electr. Corp., Kamakura, Japan

fYear

2011

fDate

5-10 June 2011

Firstpage

1

Lastpage

4

Abstract

A novel microstrip line resonator is proposed for ultra-wide-stopband microwave bandpass filters. It consists of a stepped-impedance resonator (SIR) with a high-impedance transmission line on punched hole structure (PHS), and thin-film resistors implemented in the SIR for absorbing higher-order resonance power. A fabricated 2-stage microstrip bandpass filter at f₀ = 2.0 GHz has realized a spurious response level <; -29 dB up to 25 f₀, which seems to be the superior wide-stopband performance among ever-reported ones in the category of microwave microstrip line filters.

Keywords

band-pass filters; band-stop filters; microstrip lines; microwave filters; resonator filters; thin film resistors; transmission lines; 2-stage microstrip bandpass filter; frequency 2 GHz; high-impedance transmission line; punched hole structure; resistor-loaded microstrip line resonator; stepped-impedance resonator; thin-film resistors; ultrawide-stopband bandpass filters; Microwave theory and techniques; Bandpass filters; harmonic suppression; microstrip filters; microwave resonators; spurious response; thin film resistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International

Conference_Location

Baltimore, MD

ISSN

0149-645X

Print_ISBN

978-1-61284-754-2

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2011.5972744

Filename

5972744