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This paper presents a novel low profile circularly polarized antenna. The antenna structure consists of a single dipole over a wire made non uniform high impedance surface. The proposed design incorporates the following concepts simultaneously: artificial high impedance surfaces or magnetic conductors, metamaterials showing refractive indexes of less than unity (n < 1), and polarizing structures...
A non-uniform high impedance surface (NU-HIS or tapered HIS) is proposed against a uniform HIS (U-HIS). The surfaces are one dimensional (1D) and made of parallel wires with a length a little less than half wavelength. To show the effects of the surfaces, a half wavelength dipole antenna is placed near three different surfaces, PEC, U-HIS, NU-HIS while the dipole height is fixed. These three EM problems...
In this paper, a globally optimal optimization algorithm is used for broadband design of a wideband panel sleeve monopole antenna. The antenna is to meet the FCC standard on VSWR for FM broadcasting antennas, which is VSWR<1.3 all over the 88-108 MHz range. Open-sleeve dipoles have been traditionally constructed out of cylindrical wires with two or more parasitic elements. In this paper, however,...
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