Novel compact bow-tie slot antennas for ultra-wideband applications

The increase of mobile applications requires antennas ever smaller in form factor. In this paper, three kinds of bow-tie slot antennas have been proposed for ultra-wide band (UWB) applications in the 3.1-10.6 GHz band including full-size, half-size and half-size antennas with a band notch. The half-size antenna with dimensions of 30×29 mm² is proposed by halving the full-size symmetrical antenna. The antenna is then modified to possess band rejection at the wireless local area network (5.1-5.8 GHz) band by adding a U-shaped slot on the radiating element. Experimental results are compared with simulated results and a very good agreement is obtained.