Design and analysis of a novel, compact, multi band-notched, super wideband antenna applicable for Wireless Personal Area Networks

A Super Wideband (SWB), compact sized, coplanar waveguide fed monopole antenna having dual-band notch feature has been investigated in this paper. The antenna exhibits an extremely wide impedance-bandwidth of 33.12 GHz (01.19 GHz – 34.31 GHz) and an equivalent fractional bandwidth of 186.59 %. The antenna proposed here, shows dual band-notch features at WiMAX (03.3 GHz - 03.7 GHz) and WLAN (05.15 GHz – 05.85 GHz) bands. The band rejection characteristics, for the WLAN band centered at 05.5 GHz has been obtained by introducing a Split Ring Rectangular Resonating Structure (SRRRS) at the lower section of the elliptical radiator. A Defected Spiral Microstrip Structure (DSMS) has been introduced in the feed line segment for obtaining a second band-notch for the WiMAX band centered at 03.5 GHz. The dimension of the whole structure is $W\ x\ L = 20 \times 22\ \mathrm{mm}^{2} = 0.079 \lambda_{\mathrm{o}} \times 0.087 \lambda_{\mathrm{o}}\ \mathrm{mm}^{2}$. The proposed antenna is applicable for Wireless Personal Area Network (WPAN) based communications.