Abstract
This paper presents a tapered microstrip -fed asymmetric planar inverted cone ring antenna (PICRA) for ultra-wideband (UWB) applications. The proposed antenna design is comprised of an asymmetric inverted cone ring as the radiating patch, a tapered microstrip -fed line and modified tapered ground plane. The proposed antenna which has the size of 23.6 x 40 mm 2 , is fabricated to work on a substrate FR4 that has the relative permittivity (er) of 4.4 and a thickness of 1.6mm to operate in the UWB band (3.1GHz to 10.6GHz) released by Federal Communications Commi ssion (FCC) in 2002.It has been demonstrated to operate a wide impedance bandwidth from 3.1GHz to 15GHz, completely covering the range of UWB operation bandwidth. The simulated and measured results show that the proposed PICRA achieves a broad impedance ba ndwidth for VSWR < 2 and maintains the nearly omni -directional radiation characteristics. The parameters which affect the performance of the antenna characteristics are investigated in this paper.
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