Investigations on a dual-frequency micro strip antenna for wireless applications

In this paper, the design of a micro strip patch antenna is reported which can be operated at GPS (Global Positioning System) and Bluetooth frequencies. Very small thin micro strip antenna is excited by a co-axial SMA connector to produce centre frequency of a Bluetooth system and the correct feed position is determined for impedance matching. Then a thin parasitic micro strip patch is coupled with this patch to excite the centre frequency of GPS system. The simulated results using IE3D software are supported by measurement.