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2011-10-19
CRLH ZOR Antenna of a Circular Microstrip Patch Capacitively Coupled to a Circular Shorted Ring
By
Progress In Electromagnetics Research C, Vol. 25, 15-26, 2012
Abstract
In this paper, a novel Metamaterial (MTM) CRLH Zeroth Order Resonance (ZOR) Circular microstrip patch antenna is proposed to have a monopole antenna pattern due to the completely closed loop of a magnetic current around the structure, and reduced profile and size due to the left-handedness. Different from other ZOR antennas of 1D periodic arrays with shorted patches, we suggest 1 circular patch capacitively coupled to 1 circular shorted ring to have ZOR and -1st resonance modes. The antenna is designed and modeled with equivalent circuits for the coaxial-fed central patch and the circular shorted ring and verified by the comparison with 3D EM simulation of the physical structure. The no-phase variation at the ZOR (2.4 GHz) and the -1st resonance mode (2 GHz) as the metamaterial properties are proven with electric field distributions and far-field patterns. The measurement shows there exist the ZOR and the -1 resonance modes despite the frequency shift from the simulation, which is proven by the monopolar radiation pattern and broadside radiation pattern, respectively. So the advantages of the proposed antenna will be addressed with the low-profile monopole at the ZOR and the size reduction effect at the -1st resonance.
Citation
Seongryong Yoo Sungtek Kahng , "CRLH ZOR Antenna of a Circular Microstrip Patch Capacitively Coupled to a Circular Shorted Ring," Progress In Electromagnetics Research C, Vol. 25, 15-26, 2012.
doi:10.2528/PIERC11072803
http://www.jpier.org/PIERC/pier.php?paper=11072803
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