volume | PIER Journals

Abstract

This article describe a linearly polarized lamp-shaped dual-wideband monopole wearable antenna for use in Industrial, Scientific and Medical (ISM), and public safety bands. To compress the antenna, the low current corners of the rectangular patch and the two regular octagons were eliminated. The lamp-shaped antenna of size 0.438λ₀ × 0.449λ₀ (53.9 × 55 × 1.0 mm³) was engraved on a jeans substrate at a frequency of 2.45 GHz. The antenna is 37.15% smaller (miniaturized) than a traditional rectangular patch antenna (59.7 mm × 78.68 mm) at the same design frequency. The antenna achieves dual widebands (2.17-2.86 GHz) and (4.42-5.06 GHz) with resonance frequencies of 2.45 and 4.70 GHz. At these resonant frequencies, the proposed wearable antenna has gain values of 3.86 dBi and 6.63 dBi and radiation efficiencies of 96.34% and 92.27%. Both the E- and H-planes exhibit bidirectional radiation characteristics. Thus, the proposed wearable antenna is the best for ISM, Wi-Fi, WLAN, Bluetooth, Wi-MAX (2.3 GHz), commercial, governmental, and military applications (4.40-4.99 GHz), hilly and watery rescue operations, radio astronomy services (4.80-4.94 GHz), public safety applications (4.94-4.99 GHz), Internet of Things (IoT), military fixed and mobile communications (4.40 to 4.50 GHz), and telemetry applications such as unmanned vehicles and drones. Finally the detailed electrical equivalent circuit modelling and ON-body and OFF-body Specific absorption Rate (SAR) investigations of the antenna are presented. The SAR values are found within the acceptable limits below 1.6 W/kg for 1g of tissue.

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Dr. Shiv Kumar Singh

Dr. Atul Varshney

Dr. Tanuj Garg

Dr. Zahriladha Zakaria

Professor Ahmed Jamal Abdullah Al-Gburi