Fabrication of CPW-Fed Fractal Antenna for UWB Applications with Omni-Directional Patterns

Abstract

Novel and compact CPW-fed antennas are proposed comprised of a fractal patch and modified ground-plane. The ground-plane is truncated at the center and includes dielectric notches at its side to enhance the antenna's impedance bandwidth. The dimensions of the notches effectively control the upper and lower band edges of the antenna. The optimized antenna operates across 2.95–12.81 GHz for S 11 ≤ −10 dB. Omnidirectional radiation pattern is achieved over the full UWB frequency range. The miniaturized antenna has a total size of 14 × 18 × 1 mm3. The characteristics of the proposed antenna are suitable for UWB wireless communication requiring low profile antennas.

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“…Paint Microssoft® e PowerPoint Microssoft® para visualizar as duas propriedades supracitadas (SEDGHI et al, 2014).…”

Miniaturization of UWB Antennas on Organic Material

“…However, bandwidth reduction is inevitable in this approach because bandwidth is also inversely proportional to the permittivity [2]. In an attempt to increase the bandwidth of an antenna and cover the whole UWB frequency range, configurations like planar monopoles [5][6][7][8], slot fed IF (inverted F) [6], CPW-fed monopole [7,[9][10][11][12], U-shaped elliptical slot [13], patch array with energy band gap (EBG) structures [3], and CPW-fed fractal antenna [14] have been proposed. Also, the effects of printed UWB antenna miniaturization on transmitted time domain pulse fidelity and pattern stability have been recently discussed in [15].…”

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