WIDE SLOT ANTENNA WITH Y SHAPE TUNING ELEMENT FOR WIRELESS APPLICATIONS

A wide slot antenna with Y shape tuning element is presented for wireless applications (GSM 1800, WiMAX, PCS and ITM-2000). The proposed antenna is fabricated on an FR-4 substrate (tan(δ) = 0.02, εr= 4.3) with the thickness of 1.6 mm. On the top layer of the substrate, a 50 ohm microstrip line is fabricated which is terminated in Y shape tuning element. On ground plane, an irregular wide slot and triangular notch are etched. In addition, for performance improvement two triangular shaped parasitic slots are embedded on the ground plane. The proposed antenna is energized by the microstrip line. It exhibited the bandwidth of 127.55% from 1.15 GHz to 5.2 GHz for |S11| < −10 dB. Surface current distribution and radiation pattern at resonating frequencies 1.25, 1.9 and 4.2 GHz are analyzed. Impact of parameters on S11 characteristic is also studied to know the behavior of the antenna.