Analysis of slot coupled patch antennas using closed form green’s functions

Göksu, Mesut
In this thesis, an analysis technique for the slot coupled patch antennas using MoM in conjunction with the closed form Green’s functions is presented. Slot coupled patch antennas are fed by a microstrip open stub which is coupled to the patch through an electrically small slot. Current distributions over the microstrip line, slot line and the patch are represented by rooftop basis functions. First, a relatively simple structure, microstrip coupled slot line is investigated using the proposed technique. Then the method is extended to the slot coupled patch antenna geometry. By using the method, current distributions on the feedline and the patch are calculated for a generic slot coupled patch antenna. Then by using the distributions, return scattering parameters of the antenna is approximated with complex exponentials using Prony’s method. A parametric study is carried out to observe the effect of each antenna component on the antenna performance. Current distributions and return loss calculations are repeated for modified antennas to observe and demonstrate the performance differences. All simulations are verified using HFSS® software and the results available in the literature.


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Citation Formats
M. Göksu, “Analysis of slot coupled patch antennas using closed form green’s functions,” M.S. - Master of Science, Middle East Technical University, 2009.