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In this paper a novel design concept, notch-band UWB printed antenna, fed by Coplanar Waveguide (CPW) has been proposed. All the analysis has been carried out using IE3D simulator. The Bull Head antenna is designed using FR4 with thickness of 0.8mm and dielectric constant of 4.2. This paper demonstrates a band-notched UWB antenna which is having rejection characteristics at 3.7GHz and 5.5GHz. Thus...
In this paper, a novel design concept of microstrip patch antenna(MPA) has been proposed. This antenna is coaxially fed and is reduced in size and enhanced in bandwidth. Analysis has been done using IE3D simulator. The antenna is designed using FR4 substrate of thickness 1.6mm and dielectric constant of 4.4. This paper demonstrates increased −10 dB impedance bandwidths of 500 MHz (3.2–3.6 GHz), 400...
The surface chemistry of GaAs (100) with 50-keV Ar+ ion beam irradiation at off-normal incidence has been investigated in order to elucidate the surface nano-structuring mechanism(s). Core level and valence band studies of the surface composition were carried out as a function of fluences, which varied from 1 × 1017 to 7 × 1017 ions/cm2. Core-level spectra of samples analyzed by X-ray photoelectron...
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