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Microstrip Ring as a Compact Tunable Microwave Bandgap Structure  

Jang, Mi-Young (School of Electrical and Computer Engineering)
Kee, Chul-Sik (School of Electrical and Computer Engineering)
Park, Ik-Mo (School of Electrical and Computer Engineering)
Im, Han-Uk (School of Electrical and Computer Engineering)
Han, Hae-Wook (Department of Electrical and computer Engineering)
Lee, Jung-Il (Photomic research Cemter, KIST)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.39, no.9, 2002 , pp. 35-43 More about this Journal
Abstract
In this paper, microstrip ring with a narrow gap is characterized and used as a tunable microwave bandgap (MBG) structure. The center frequency of MBG is mainly determined by the mean circumference of the ring and coincides with odd mode resonance frequency of the ring resonator. The stop band formation by the proposed microstip MBG ring is due to the reflection of electromagnetic waves at the narrow gap introduced in the ring, and the reactive component mounted on the gap makes the stop band vary according to its value. The mounting of capacitor (inductor) is observed to decrease (increase) the center frequency of the stop band. The varactor-mounted microstrip MBG ring is expected to be useful in microwave switches and microwave amplifier circuits.
Keywords
PBG; MBG;
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