Overcoming Inherent Narrow Bandwidth and Low Radiation Properties of Electrically Small Antennas by Using an Active Interior-Matching Circuit

作者: Ayman A Althuwayb , Mohammad Alibakhshikenari , Bal S Virdee , Francisco Falcone , Ernesto Limiti

DOI: 10.1109/ACCESS.2021.3054939

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摘要: A technique is described to extend the working frequency-band and increase radiation gain efficiency of an electrically small antenna (ESA). The geometry proposed ESA in shape “ $H$ ” structure. gap included at symmetry -shape structure embed inductive load that used connect two halves -shaped antenna. With lumped element inductor, bandwidth restricted by Chu-lower bound. However, it demonstrated analytical analysis through 3D full-wave electromagnetic simulations when replaced with negative reactance from a impedance converter (NIC) antenna’s bandwidth, performance can be significantly improved ~ 40%, 3.6 dBi 55%, respectively. This because NIC acts as effective interior matching circuit. resonant frequency was determine required inductance variation realize characteristics

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