Miniature Harmonic-Suppressed Microstrip Bandpass Filter Using a Triple-Mode Stub-Loaded Resonator and Spur Lines

Author

Torabi, Amir ; Forooraghi, Keyvan

Author_Institution

Dept. of Electr. & Comput. Eng., Tarbiat Modares Univ., Tehran, Iran

Volume

21

Issue

5

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

255

Lastpage

257

Abstract

A miniature harmonic-suppressed microstrip band pass filter (BPF) with a new triple-mode stub-loaded resonator is presented in this letter. Four distinct mechanisms are utilized to create five transmission zeros (TZs), leading to sharp skirts and wide stopband. Both simulation and measurement results are presented. The simulated/measured minimum passband insertion loss is 0.66 dB/0.78 dB and the 20 dB rejection bandwidth is extended up to 4/0. The size of the filter is about 0.23 λ_g × 0.17 λ_g, where λ_g is the guided wavelength at the center frequency.

Keywords

band-pass filters; harmonics suppression; microstrip filters; resonator filters; center frequency; loss 0.66 dB; loss 0.78 dB; microstrip BPF; miniature harmonic-suppressed microstrip bandpass filter; minimum passband insertion loss; spur lines; transmission zeros; triple-mode stub-loaded resonator; Band pass filters; Couplings; Filtering theory; Microstrip filters; Microstrip resonators; Resonant frequency; Bandpass filter (BPF); spur line; stub-loaded resonator (SLR); transmission zero (TZ); triple-mode resonator;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2011.2122304

Filename

5739555