The feed is offset by 4 mm from the origin along the x-axis. The lossless substrate has a dielectric constant of 9.29 and thickness of 3.82mm. Create a Patch Antenna on a High-Epsilon Thick SubstrateĬreate a rectangular patch antenna with a length of 36 mm and a width of 48 mm on a 55 mm x 80 mm ground plane. As the 10 element per wavelength criteria is not satisfied, a certain amount of error in the solution is expected. In Antenna Toolbox if the substrate thickness is greater than 1/10th of the wavelength in dielectric, manual meshing is recommended for solving the antenna. So if the dielectric thickness becomes greater than this, the solution accuracy is affected. A method of moments solver requires at least 10 elements per wavelength to give an accurate solution. The next case considers a patch antenna on a substrate whose thickness is 1/10th of the wavelength in dielectric. So the substrate thickness is about 1/50th of the wavelength in dielectric. The wavelength in dielectric is approximated by dividing the above number by the square root of the dielectric constant. In the case above the wavelength in free-space is about 126 mm. Thickness of a dielectric substrate is measured with respect to the wavelength.
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