Comparison of Electromagnetic Simulation Results with Experimental Data for an Aperture-Coupled C-band Patch Antenna

Report No. ARL-TR-3994
Authors: Steven Keller, William Coburn, Theodore Anthony, and Chad Patterson
Date/Pages: November 2006; 24 pages
Abstract: The Method of Moments, implemented in 2.5-dimensions (2.5-D) with the multilayer Green?s Function, and the Finite Element Method, a fully three-dimensional (3-D) solution of Maxwell?s equations, are two popular methods for antenna simulations. Commercial software implementing these two methods was used to simulate a single aperture-coupled patch antenna element. This effort was time limited so that a simple antenna was selected for which the antenna design, fabrication, and measurements could be accomplished in less than three months. The simulation results are compared with experimental data measured for an antenna prototype that has substrate and ground plane dimensions of 4 inches by 4 inches. The microstrip feed line extends to the edge of the substrate where a coaxial connector is installed between the microstrip and slotted ground plane and there is no bottom ground plane. The results are used to compare and contrast the use of these two approaches for the design and simulation of an aperture-coupled patch antenna with finite size substrate and ground plane.
Distribution: Approved for public release
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Last Update / Reviewed: November 1, 2006