A modified ground apollonian ultra wideband fractal antenna and its backscattering

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• 作者：Raj Kumar^a ; ^{omnamhshivay2010@gmail.com} ; Pritam B. Nikam^b
• 关键词：Antenna ; Fractal antenna ; Resonant frequency ; UWB system ; Coplanar waveguide feed
• 刊名：AEU - International Journal of Electronics and Communications
• 出版年：2012
• 期刊代码：1_14348411
• 类别：cp
• 出版时间：August, 2012
• 卷：66
• 期：8
• 页码：647-654
• 文件大小：1815 K

摘要

This paper presents the design of a modified ground apollonian ultra wideband (UWB) fractal antenna. The printed fractal antenna has been designed on a substrate with dielectric constant 蓻_r = 4.3 and thickness h = 1.53 mm. The antenna has been fabricated with optimized dimension and tested. The experimental result of this antenna exhibits UWB characteristics from frequency range 3 GHz to 18 GHz. This corresponds to 142.86%impedance bandwidth with center frequency of 10.5 GHz. The experimental radiation patterns of this antenna are nearly omni-directional in H-plane and bidirectional in E-plane. The effect of various design parameters on UWB characteristics have also been analyzed using a 3D electromagnetic simulator based on FEM method. The simulated and experimental results are in good agreement. The backscattering RCS of this UWB fractal antenna is better than 鈭?1 dB throughout the FCC band (3.1 GHz to 10.6 GHz). The proposed coplanar waveguide feed appollian fractal antenna can be easily integrated with radio-frequency/microwave circuitry with low-manufacturing cost and useful for UWB applications.