Microstrip antennas, also called patch antennas, are very popular antennas in the microwave frequency range because of their simplicity and compatibility with circuit board technology. Stacked patches consist of one of more conducting patches which are parasitically coupled to a driven patch. This configuration overcomes the narrow bandwidth limitation by introducing additional resonances in the operating band, while maintaining the advantages of the conventional patch antenna. Like the simple pin-fed rectangular patch, the stacked pin fed patch is fairly simple to construct and does not suffer from feed network radiation. Unlike the simple pin-fed rectangular patch, it can offer wider operational bandwidths.