International Symposium on Antennas and Propagation
Increasing the Bandwidth of a Metamaterial - Inspired 2D Magnetic-Based Antenna
Chia-Ching Lin, Richard W. Ziolkowski,
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An efficacious, electrically-small antenna design methodology has been presented previously in , . Although those antenna systems were electrically small, their designs were demonstrated to achieve an overall efficiency that was greater than 90%, without the need for any external matching circuit. Both microwave engineered (interdigitated capacitor) and lumped element capacitor versions of those designs were obtained. It was found that, the metamaterial-inspired parasitic structures that were placed in the very near field of the radiating element provide reactive and resistive impedance matching to the source. However, the bandwidth still remained small, as was expected, and thereby limited their potential applications. It is desired to develop an approach to enlarge the bandwidth of these 2D magnetic EZ antennas to provide reasonable Q values while still maintaining high overall efficiencies.