19 Compact Ultra-Wideband Antenna with Dual Band-Notches for WiMAX and Upper WLAN Band

A dual band-notched printed planar antenna is proposed for ultrawideband applications. The proposed compact antenna comprises of a rectangular radiating patch and a modified partial ground plane. A U-shape parasitic strip and a rectangular split ring resonator are placed below the substrate to achieve dual band-notched characteristics. The measured results show that the proposed antenna achieved a wide impedance bandwidth from 2.9 to 11 GHz, defined by 10 dB with one notch frequency band at 3.3 –3.8 GHz and the other at 5.6–6 GHz. A stable radiation pattern and flat gain except in the notched band makes the proposed antenna suitable for being used in UWB applications.