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This paper presents a low-profile dual-arm Archimedean spiral antenna over an artificial magnetic conductor (AMC) ground plane. The antenna under study produces right handed circular polarization. The AMC ground plane consist of 4times4 square patches with no vias. The distance between the antenna and the top of the AMC ground plane is reduced to 0.02lambda0. The operating frequency is 4.5 GHz. The...
In order to enhance the gain of miniaturized microstrip antennas, a novel technique is developed where the conductor of miniaturized ring antennas is formed by depositing multiple conductor layers separated by dielectric lamination. The laminating dielectric thickness is smaller or of the order of the skin depth of the conductor. First, it is shown analytically that when multiple laminated conducting...
It was shown that the angular and polarization dependence of the AMC ground planes have significant role in the far-field properties of the antenna mounted above them. Optimization on the reflection phase of artificial ground planes and their synthesis will be the future work.
This work has investigated the effects of various parameters of AMC structures comprising different metallizations on the high-impedance bandwidth and resonant frequencies, for various metal shapes. Through these studies, insights into the roles played by these parameters may be gained, which could then facilitate proper designs of AMC structures and judicious selections of appropriate metal shapes...
The electromagnetic scattering from coated conducting bodies of revolution is computed using the moment method. The equivalent principle is used to generate different formulations for the problem. These formulations are then used to compare the numerically determined solutions with the analytic ones, for coated spheres using the Mie series solution. It is shown that the solution accuracy generally...
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