Optimizing a coplanar waveguide-fed aperture coupled patch antenna for ease of manufacturing and elimination of back radiation problems

Abstract

A compact CPW-fed aperture coupled patch antenna is modeled using the moment method code, IE3D. It is shown that improvements can be made be optimizing various parameters of the antenna, such as patch diameter, CPW slot width, etc. The improvements are an increase in the bandwidth of the antenna, in the return loss across the band, as well as in the design which yield a more practical antenna in terms of construction (i.e. typical manufacturing tolerances do not significantly effect the performance of the antenna). It is also shown that a CPW fed aperture coupled patch antenna can be made with a ground plane which will actually improve the performance of the antenna after careful consideration of the height above the ground plane and dielectric used.