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In this paper, a compact low-profile dual-band 2 × 2 wide band wearable slot antenna (smart watch) for the frequency spectrum of 3.4–3.6 GHz (LTE Band 42) is proposed. For smart watch applications, the antenna should be as small as possible and it should be resonating at the forthcoming 5G technology. Hence, two resonant modes are achieved for each antenna by etching the T-shaped monopole slot in the ground plane of size 40 × 40 mm 2 , and each slot is coupled fed by the L-shaped tuned stub which is printed on the 0.8 mm-thick FR4 substrate. The proposed antenna is fabricated and its performance is experimentally measured. The measured antenna parameters agree well with the simulated results. The reflection co-efficient and transmission co-efficient of the Multi Input Multi Output (MIMO) antenna are well below −10 dB throughout the band of operation. The efficiency of the MIMO antenna is achieved up to 81% with the overall gain of about 2.4 dB. To validate the proposed MIMO performance, the envelope correlation co-efficient between the antenna elements is calculated. In this paper, the effect of the proposed antenna in the human hand is also studied and discussed along with the specific absorption rate.

Performance Analysis of Highly Efficient Two-Port MIMO Antenna for 5G Wearable Applications