Asymptotic Evaluation of the Mom Excitation Vector for Probe-fed Microstrip Antennas

Authors: Bilotti, F.; Alù, A.; Urbani, F.; Vegni, L.

Source: Journal of Electromagnetic Waves and Applications, Volume 19, Number 12, 2005 , pp. 1639-1654(16)

Publisher: VSP, an imprint of Brill

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Abstract:

In this paper, we derive some original asymptotic expressions to speed up the computation of the excitation vector in the Method of Moments (MoM) numerical analysis of probe-fed planar microstrip antennas. These proposed expressions may be applied to the full-wave analysis of patch antennas in the spectral domain using the asymptotic Greens dyad of the planar integrated structure. It is shown in particular how planar patch antennas fed by a coaxial probe may be efficiently analyzed using fast converging 1D integrals to represent the MoM excitation vector, instead of employing the standard spectral bi-dimensional integrals. The numerical results underline the quick convergence of these new expressions and the consequent reduction of the computational time with respect to standard techniques.

Document Type: Research article

DOI: 10.1163/156939305775537410

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