Abstract
A novel compact self-similar fractal ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna is presented. This fractal geometry is designed by using iterated function system (IFS). Self-similar fractal geometry is used here to achieve miniaturization and wideband performance. The self-similarity dimension of proposed fractal geometry is 1.79, which is a fractional dimension. The antenna consists of two novel self-similar fractal monopole-antenna elements and their metallic area is minimized by 29.68% at second iteration. A ground stub of T-shape with vertical slot enhances isolation and impedance bandwidth of proposed MIMO antenna. This antenna has a compact dimension of 24 × 32 mm2 and impedance bandwidth (S11 < −10 dB) of 9.4 GHz ranging from 3.1 to 12.5 GHz with an isolation better than 16 dB. The various diversity performance parameters are also determined. There is good agreement between measured and simulated results, which confirms that the proposed antenna is acceptable for UWB applications.
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