A multilayer rectangular patch antenna for broadband operation

In this paper the theoretical investigations have been carried out to improve the bandwidth and gain of the antenna using multilayer configuration. The antenna shows the broad bandwidth when a patch is stacked over fed patch in gap coupled structure. Typically a 42.65 % bandwidth is achieved in three layer antenna. Further the bandwidth of the antenna depends inversely on the gap(s). The gain of the antenna is found to be 6.08 dB with 3 dB beam width of 920. The theoretical results are compared with IE3D simulation and reported experimental data.