A novel compact dual band‐notched slot antenna for ultrawideband applications

A compact dual band-notch ultra-wideband circle-like slot antenna fed by coplanar waveguide line is proposed.The U- and L-shaped slots are used to create dual-band notch characteristics. The antenna is as small as 26 × 26 × 1.6 mm3. The designed antenna offers a wide bandwidth from 2.75 to 14.2 GHz (135%), defined by VSWR < 2, with two notched bands, covering all the 5-/6-GHz WLAN, 3.5-/5.5-GHz WIMAX and 4-GHz C bands. An equivalent circuit model of the antenna is presented to discuss the mechanism of the dual band-notched UWB antenna. Impedance, radiation, and gain characteristics of the proposed antenna are also discussed. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1365–1368, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26862