Rectangular Slot Antenna for WI-Max

A printed rectangular patch antenna (RPA) with a multiple rectangular shape slots with a rectangular ground plane has been proposed. Four rectangles of dimensions 7.3mm x 1mm is arranged in such a manner to achieve a bandwidth of 200 MHz having a centre frequency of 3.498GHz. This antenna is fabricated on the glass epoxy (FR4 lossy) of dielectric substrate with relative permittivity (€r) of 4.3, thickness of 1.6 mm. Simulated Return loss of -41.7dB is achieved with a good antenna gain. Other parameters such as bandwidth, antenna gain, VSWR are also analysed with different values of ground plane length and feed gap. The simulation and measurement results show that the designed antenna is capable of operating over the 3.399– 3.599GHz frequency band. The proposed antenna finds application in Wi-Max which works around 3.5GHz.