Abstract

The desire for wearable ultra-wideband antennas has grown up rapidly in recent years. This paper presents a wearable ultra-wideband (UWB) antenna fed by a coplanar waveguide (CPW) on paper substrate and analysis of its performance for early detection of brain stroke. A very thin sheet of paper is considered as substrate in order to make the antenna flexible, wearable, low-cost and environment friendly. The antenna shows reflection co-efficient of -10dB or less at frequencies between 1.91 GHz to 34.45 GHz. It covers the 2.36-2.4 GHz MBAN (Medical Body Area Network) band, 2.4-2.5 GHz ISM (Industrial, Scientific and Medical) band, 3.1-10.6 GHz UWB and internet of things (IoT) frequency bands and 5G communication bands. Specific Absorption Rate (SAR) is calculated placing the antenna to a 7-layer human head model only 5 mm apart in order to check the compatibility of the antenna for wearable applications. Improvement in SAR is also shown comparing with other antennas. Improvement of SAR and other simulation results of the proposed antenna make it suitable for wearable applications.

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