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It is demonstrated numerically that a metamaterial-inspired, low profile (height approximately $\lambda $ /80), electrically small ($\textrm {ka} = 0.45$ ) Huygens source antenna can be designed to radiate at 300 MHz in its broadside direction with a high radiation efficiency and a large front-to-back ratio. Two electrically small, near-field resonant parasitic (NFRP) antennas are first designed...
A novel toroid-structured coated nano particle (T-CNP) antenna with an active core (doped with rare earth ion Er3+) is studied in this paper. It is demonstrated that the active toroid-structured nano particle, when illuminated by an electric Hertzian dipole (EHD) (small current) element, acts as a strong radiator at its resonant frequency (around 600 THz). It is shown that the maximum peak of the...
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