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An epsilon-shaped fractal antenna for UWB MIMO applications

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Abstract

A planar ultra-wideband (UWB) fractal antenna based on a novel epsilon-shaped geometry is described for microwave applications in this article. The single antenna geometry is proposed by combining the four epsilon shapes and three pairs of straight-line conductors. The size of the designed single antenna is 26 × 22 × 1.6 \({\mathrm{mm}}^{3}\) and the unit cell antenna is used to propose a 2 × 2 array antenna. The overall dimension of the Multiple Inputs Multiple Outputs (MIMO) antenna is 26 × 36 mm. The new configuration has an impedance bandwidth ranging from 2.26 to 18.05 GHz. Two comparable geometric halves are positioned in parallel with a pair of inverted L-shaped decoupling structures in the proposed low-profile MIMO antenna. Various diversity metrics of the MIMO antenna are demonstrated by measurement results, including the low value of the mutual coupling features, lower than 0.3 bits/s/Hz for channel capacity losses (CCL), below – 10 dB in total active reflection coefficient (TARC), less than 0.004 for envelope correlation coefficient (ECC), smaller than 9.97 dB in a diversity gain, and suitable mean effective gain (MEG 0.5, MEG ratio = 1). At the operating frequency of 18.01 GHz, the suggested antenna comprises a maximum gain of 7.81 dB.

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Authors and Affiliations

  1. Department of Electrical Engineering, Urmia University, Urmia, Iran

    Hiwa Taha Sediq, Javad Nourinia, Changiz Ghobadi & Bahman Mohammadi

  2. Department of Information Technology, Shaqlawa Technical College, Erbil Polytechnic University, Erbil, Iraq

    Hiwa Taha Sediq

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  1. Hiwa Taha Sediq
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  2. Javad Nourinia
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  3. Changiz Ghobadi
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Sediq, H.T., Nourinia, J., Ghobadi, C. et al. An epsilon-shaped fractal antenna for UWB MIMO applications. Appl. Phys. A 128, 845 (2022). https://doi.org/10.1007/s00339-022-05940-z

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