Triangular Aperture UWB Antenna with Dual Band-Notched Characteristic for WLAN Bands

A compact ultra-wideband (UWB) patch antenna with dual band-notched characteristic is designed for 2.4 GHz and 5 GHz WLAN bands. First an UWB antenna with size of 15.23×35.02 mm
²
is designed, operating over 2.4-11.8 GHz. Then the bands are notched through a step-by-step optimization process. The UWB antenna is optimally achieved by loading triangular aperture between the patch and ground. The 2.4 GHz and 5 GHz bands are respectively notched by adding an inverted U-shaped slit on the patch and two C-shaped strips over the ground plane. The design procedure of the band-notched antenna is expressed by verifying through the return loss. Moreover, the notching mechanism and radiation performance of the antenna are studied with regard to surface current distribution, 2D and 3D radiation patterns and peak gain. The results demonstrate that the proposed antenna is applicable for UWB operation as well as has dual band-notched characteristic at the frequency range of 2.2-2.8 GHz and 4.5-6.8 GHz.