Multi-frequency, linear and circular polarized, metamaterial-inspired, near-field resonant parasitic antennas

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Journal Article
IEEE Transactions on Antennas and Propagation, 2011, 59 (5), pp. 1446 - 1459
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Several metamaterial-inspired, electrically small, near-field resonant parasitic antennas are presented. Both electric and magnetic couplings to the parasitic are compared and contrasted. The electric-coupled versions are shown to be more efficient and to have more bandwidth. The evolution of circular polarized designs from their linear counterparts by introducing multiple parasitics having different resonant frequencies is demonstrated. Single L1 and dual band L1/L2 GPS systems are emphasized for practical illustrations of the resulting performance characteristics. Preliminary experimental results for a dual band, circularly polarized GPS L1/L2 antenna are provided and underscore several practical aspects of these designs. © 2011 IEEE.
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