Effective UWB Antenna Using H Slot Cut in Ground Plane to Enhance Performance with WLAN Rejection

In this paper, a bandwidth enhancing technique is presented using a modified ground plane with H slot cut in ground plane for designing of compact antenna a new type of band-notched novel shaped slot antenna is proposed for UWB applications. By cutting novel H shaped slot on the ground plane, desired notched frequency band is achieved. By properly adjusting the parameters of proposed antenna is analyzed by the Ansoft -HFSS software, which is possible to find desired band width and centre frequency of notched band. The proposed antenna is designed on a substrate Rogers RT/duroid 5880 with thickness of 0.762 mm (30mils) and relative permittivity (∈_r) of 2.2, and loss tangent 0.0004 to operate in UWB frequency band. To reject the frequency band of 5.17? 5.69 GHz, which is limited by IEEE 802.11a, a novel shaped H slot. The size of our proposed antenna is 30×30 mm2, which results in desirable radiation characteristics. Effects of varying the parameters of novel shaped H slot on performance of proposed antenna have been studied. The antenna with optimal parameters obtained from parametric study is fabricated and measured. It is observed that the simulation and experimental results have good agreements with each other. The proposed Antenna achieved given parameter like Bandwidth (2.8-13.1GHz), Frequency Spectrum (10.3GHz), Fraction Bandwidth (129.55%), Positive Gain, Low Cost, Good Impedance matching, with omni-directional Radiation Pattern which is extremely good.