Approach of Metamaterial-Based Quarter-Wave Resonator and Its Application to Very Compact LTCC Bandpass Filter

Masaya TAMURA  Toshio ISHIZAKI  Mohammed Reza M. HASHEMI  Tatsuo ITOH  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E93-C   No.7   pp.1078-1088
Publication Date: 2010/07/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
metamaterial,  CRLH-TL,  quarter-wave,  resonator,  negative-order,  LTCC,  bandpass filter,  

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Summary: 
In this paper, a resonator based on composite right/left handed transmission line concept is discussed. This resonator excites --1st order resonance mode. We start with half-wave resonators consisting of two unit cells of a composite right/left handed transmission line. From the simulated field distributions, the center of these half-wave resonators can be short-circuited to obtain a quarter-wave resonator in the --1st mode. Susceptance slope parameters are calculated for the resonator. Then this resonator is applied for a 2-pole filter made by LTCC, which can be designed with standard filter design theory owing to the slope parameter. The dimension of the experimental filter implemented by LTCC is 2.5 mm by 1.35 mm by 0.52 mm. The insertion loss is 1.80 dB at the 2.4 GHz band. Good agreement between measured and computed results is obtained.