Compact band-notched ultrawideband antenna with entire 5-GHz WLAN band rejection

A compact ultrawideband (UWB) monopole-like slot antenna having band-notched characteristics over entire 5-GHz wireless local area network (WLAN) band is presented. The proposed antenna comprises a coplanar waveguide (CPW) fed monopole-like slot and band-notched structures. By adding grounded open-circuited stubs in the slot and embedding spur-lines in the fork-shaped feeding structure, the notched-frequency / bandwidth are controllable. A compact antenna prototype which is etched onto an FR4 printed circuit board (PCB) with an overall size of 26 mm × 29 mm × 1.5 mm demonstrates good impedance matching, constant gain, stable radiation patterns over an operating bandwidth of 2.6-13.0 GHz except the 5-GHz WLAN band of 5.15-5.85 GHz, where sharp and high band rejection is achieved.