Compact dual-band-notched CPW-fed wide-slot antenna for WLAN and WiMAX applications

A simple and a compact dual-band-notched CPW-fed wide-slot antenna, which has a small size of 20 × 25 mm2 is presented for simultaneously satisfying wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications. By introducing the dual-band-notched mechanism to the wide-slot antenna, the required impedance bandwidth is achieved over the frequency range from 2.15 to 6.5 GHz (S11 < −10 dB) with dual-band-notched bands from 2.69 to 3.4 GHz and from 4.32 to 4.98 GHz, covering all the 2.4/5.2/5.8-GHz WLAN bands and 2.5/3.5/5.5-GHz WiMAX bands. The dual reverse split rectangular slits are employed effectively for notching unwanted frequency bands, since it can be implemented with a small dimension and in a high Q operation similarly to the conventional strip-type dual reverse split ring resonator (SRR). Based on the simulated and measured results, a dual-band-notched WLAN/WiMAX wide-slot antenna using dual reverse split rectangular slits is very effective in rejecting unwanted frequency in terms of its selectivity. This proposed antenna with dual-band-notched, broadband matched impedance, stable radiation patterns, good antenna gains and compact size can be suitable for communication products of WLAN/WiMAX applications. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26042