A reconfigurable antenna with multiband characteristics for GPS and mobile communication

A simple Coaxial-fed antenna with frequency-band reconfigurable characteristics is presented here. This proposed antenna consists of a modified patch structure with annular-ring slots etched on it. In order to generate frequency reconfigurable characteristics different combination of ON/OFF states PIN diodes are used. These diodes are situated as switches in curve type slots. Antenna is operable in three modes on the basis of combination of ON/OFF states of the switches. This antenna is able to maintain a return loss below -10 dB for the GPS L5 Band (1.164 GHz to 1.189 GHz) exactly and 2.6 GHz for mobile broadband.