A low-profile textile MIMO antenna using felt substrate for industrial, scientific and medical band
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Abstract
A low profile textile MIMO antenna design for Industrial scientific and medical bands at 5.8 GHz is presented. The design consists of 2 embroidered antennas based on vertical and horizontal strips with a shared partial ground structure on Felt substrate. The dimensions of the designed MIMO are 50×50×1 mm3 with a permittivity of 1.2 and 0.02 loss tangent. An isolation of 18 dB between the two ports is achieved. The gain and the efficiency of the flat textile MIMO antenna are 3.64 dBi and 98%, respectively. Bending impact with different radius has been considered with a slight shift in the resonance frequency and a small reduction of gain, efficiency and isolation in the ISM band. The Envelope Correlation Coefficient (ECC) between the antennas is less than 0.01 at the operation frequency band.