A Triple Band Antenna for TETRA, GPS and WiMaX Applications

A patch antenna that has multiband behavior is generated by using the High Frequency Structure Simulator (HFSS) software for TErrestrial Trunked Radio (TETRA), Global Positioning System (GPS) and Worldwide Interoperability for Microwave Access (WiMAX) standards. The multiband antenna is created over a Flame Retardant (FR4) substrate material coated with a copper conductor for patch and ground planes. The digital Z shape is introduced within the patch of the antenna to achieve the desired multiband characteristics. A slot is introduced digital Z shaped patch structure to harmonize the antenna to the resonant frequencies of the desired applications. The impedance matching is achieved between the feed and the patch by using a microstrip feed line. The designed antenna is fabricated and tested. The tested return loss values are in lieu of the simulated return loss values which prove the working of the antenna for the three frequency bands.