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Electromagnetic analysis of an antenna embedded in a composite environment

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4 Author(s)
Pasvolsky, J. ; Fac. of Eng., Tel Aviv Univ., Israel ; Kastner, R. ; Heyman, E. ; Boag, A.

This paper addresses the problem of an antenna embedded in a hole dug in the ground. The composite medium configuration consists of a half-space dielectric (representing the Earth-air interface) containing a cylindrical hole filled with a different dielectric medium. The wire antenna resides within this hole, on the axis. The solution strategy is based on decomposing the problem into simpler subproblems, which are treated sequentially. First we calculate a numerical dyadic Green's function for the composite medium by solving an integral equation formulated over a background consisting of the unperturbed dielectric half space (for which the Green's functions are known in a spectral integral form). This integral equation is solved via the fictitious currents method, which is a special case of the method of moments. We then solve the integral equation for the antenna currents using this numerical Green's function and determine the input impedance and radiation pattern

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Antennas and Propagation, IEEE Transactions on  (Volume:49 ,  Issue: 5 )