Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 59, Issue 11, Pages 4329-4333Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2011.2164223
Keywords
Circular polarization; composite right/left-handed (CRLH); dual-band antenna; microstrip antenna; miniaturized antenna; reactive impedance surface (RIS)
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A metamaterial-inspired low-profile patch antenna is proposed and studied for circularly-polarized (CP) radiation. The present antenna, which has a single-fed configuration, is loaded with the composite right/left-handed (CRLH) mushroom-like structures and a reactive impedance surface (RIS) for miniaturization purpose. The CP radiation is realized by exciting two orthogonally-polarized modes simultaneously which are located in the left-handed (LH) region. The detailed antenna radiation characteristics are examined and illustrated with both simulated and experimental results. The CP performance can be controlled in several different ways. This antenna exhibits an overall size of 0.177 lambda(0) x 0.181 lambda(0) x 0.025 lambda(0) at 2.58 GHz and a radiation efficiency around 72%. Finally, based on the proposed CP patch antenna, a compact dual-band dual linearly-polarized patch antenna has also been designed and fabricated. Promising experimental results are observed.
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