A narrow bandwidth microstrip bandpass filter with symmetrical frequency characteristics

Author

Jun, D.S. ; Lee, H.Y. ; Kim, D.Y. ; Lee, S.S. ; Nam, E.S. ; Park, S.-O.

Author_Institution

Electron. & Telecommun. Res. Inst., Daejeon, South Korea

Volume

1

fYear

2005

fDate

4-7 Dec. 2005

Abstract

This paper proposes a band-pass filter (BPF) with two transmission zeros based on a combination of parallel coupling and end coupling of half-wave transmission lines. The fabricated BPF exhibited a narrow bandwidth and two transmission zeros near the pass-band due to the end-coupled and shielding waveguide. At the center operation frequency of 60 GHz, the 20 dB bandwidth of the BPF is 1.0 GHz, which is almost 2% of the center operation frequency, and the insertion loss is 3.12 dB. Two transmission zeros reach approximately 40 dB at 58.5 and 62.5 GHz. The simulation results almost agree with the measured results.

Keywords

band-pass filters; microstrip filters; millimetre wave filters; poles and zeros; transmission lines; 1 GHz; 3.12 dB; 58.5 GHz; 60 GHz; 62.5 GHz; end coupled waveguide; half-wave transmission lines; insertion loss; microstrip bandpass filter; parallel coupling; shielding waveguide; symmetrical frequency characteristics; transmission zeros; Admittance; Band pass filters; Bandwidth; Circuits; Couplings; Electronic mail; Filtering theory; Frequency; Information filtering; Microstrip filters; band-pass filter (BPF); end coupled; parallel-coupled;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings

Print_ISBN

0-7803-9433-X

Type

conf

DOI

10.1109/APMC.2005.1606287

Filename

1606287