A Novel Compact Metamaterial Zeroth Order Resonant Bandpass Filter for a VHF Band and Its Stopband Improvement by Transmission Zeros

A novel compact and low-loss VHF bandpass filter is presented with enhanced stopband performance using metamaterial zeroth order resonator (ZOR) characteristics. An in-line ZOR filter is initially suggested and changed to have transmission zeros (TZs) due to source-load coupling for effective improv...

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Bibliographic Details
Published inJournal of Electromagnetic Engineering and Science Vol. 13; no. 4; pp. 263 - 266
Main Authors Kahng, Sungtek, Jang, Geonho
Format Journal Article
LanguageKorean
Published 2013
Subjects
VHF
Zeroth Order Resonance
Bandpass Filter
Metamaterial
Transmission Zero
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Summary:A novel compact and low-loss VHF bandpass filter is presented with enhanced stopband performance using metamaterial zeroth order resonator (ZOR) characteristics. An in-line ZOR filter is initially suggested and changed to have transmission zeros (TZs) due to source-load coupling for effective improvement of the isolation from UHF wireless channels. The proposed filter is smaller than 1/10 of the conventional filters in terms of size and has relatively very low insertion loss (< 1 dB for the electromagnetic (EM) simulation and < 3 dB for the measurement) and return loss (<-20 dB) in the passband due to the approximately 80% size reduction and the higher isolation in the stopband due to the TZs. The circuit and EM simulation are in good agreement with the measurements.
Bibliography:KISTI1.1003/JNL.JAKO201303537265139
ISSN:2671-7255
2671-7263