Dual-mode bandpass filter using microstrip SIR at Ka band

Author

Zhang Qiu-hong ; Dong Yu-liang ; Cao Ji-gang

Author_Institution

EHF Key Lab. of Fundamental Sci., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2009

fDate

7-10 Dec. 2009

Firstpage

1401

Lastpage

1404

Abstract

A novel dual-mode bandpass filter using microstrip SIR is presented. It is composed of step impedance square ring and designed at the operating frequency of 36 GHz with a bandwidth of 1.8 GHz. The filter has a size reduction of approximately 30%, in comparison with the conventional square ring filters. It also has a good return loss. Within the passband, S11 is bellow -20dB. Because of the step impedance design, we can easily change the center frequency and the spurious response by changing the impedance ratio.

Keywords

band-pass filters; microstrip resonators; Ka Band; bandwidth 1.8 GHz; dual-mode bandpass filter; frequency 36 GHz; impedance ratio; microstrip SIR; operating frequency; spurious response; square ring filters; step impedance design; step impedance square ring; Band pass filters; Bandwidth; Bellows; Impedance; Microstrip filters; Microstrip resonators; Microwave filters; Passband; Resonant frequency; Resonator filters; Ka band; dual-mode; microstrip filter; millimeter wave; step impedance resonator (SIR);

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2009. APMC 2009. Asia Pacific

Conference_Location

Singapore

Print_ISBN

978-1-4244-2801-4

Electronic_ISBN

978-1-4244-2802-1

Type

conf

DOI

10.1109/APMC.2009.5384502

Filename

5384502