Document Type thesis Author Name Apte, Anuja D URN etd-0509103-122816 Title Simulation of patch antennas on arbitrary dielectric substrates. Degree MS Department Electrical & Computer Engineering Advisors Dr. Marat Davidovitz, Committee Member Dr. Sergey Makarov, Advisor Dr. David Cyganski, Committee Member Dr. Brian King, Committee Member Keywords electromagnetic modeling RWG basis functions MoM Date of Presentation/Defense 2003-05-09 Availability unrestricted
Based on the combined surface and volume RWG (Rao-Wilton-Glisson) basis functions, a simulator of a patch antenna on a finite dielectric substrate using the Method of Moments (MoM) has been implemented in Matlab. The metal surface is divided into planar triangular elements whereas the (inhomogeneous) dielectric volume is divided into tetrahedral elements.
The structure under study is comprised of a typical patch antenna consisting of a single patch above a finite ground plane, and a probe feed. The performance of the solver is studied for different mesh configurations.
The results obtained are tested by comparison with the commercial ANSOFT HFSS v8.5 and WIPL-D simulators. The former uses a large number of finite elements (up to 30,000) and adaptive mesh refinement, thus providing the reliable data for comparison.
Behavior of the most sensitive characteristic ¡V antenna input impedance ¡V is tested, close to the first resonant frequency. The error in the resonant frequency is estimated at different values of the relative dielectric constant ƒÕr, which ranges from 1 to 20. The reported results show reasonable agreement. However, the solver needs to be further improved.
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