Lak, Hadi J.Ghobadi, ChangizNourinia, Javad2016-10-312016-10-312011-10Wireless Engineering and Technology, 2011, 2, 235-239http://dx.doi.org/10.4236/wet.2011.24032http://hdl.handle.net/123456789/1100In this letter, a simple monopole antenna with variable band-notched characteristic for ultra wide band (UWB) function is proposed. Two L-shaped quarter-waveguide resonators coupled to the ground plane with two shorting tracks at the sides of the antenna are used to generate stop-band performance around 5.5 GHz (WLAN). The proposed antenna is fabricated on the substrate FR4 (relative permittivity of 4.7) and has a compact size of 16 × 28.5 × 1.6 mm. The designed antenna has a good impedance matching in 3.1 - 11.4 GHz frequency range with VSWR < 2, except the band 5 - 5.85 GHz.enBand-Notched AntennasBand Rejection AntennasPlanar AntennasUltra Wideband (UWB)Article