volume | PIER Journals

Abstract

A flexible ultra-wideband antenna is presented using a denim (jeans) textile substrate for wearable 5G and Internet of Things (IoT) applications. The antenna employs a coplanar waveguide (CPW) feed with a rectangular defected ground structure (DGS) etched in the ground plane to improve impedance matching. Bandwidth enhancement is achieved by introducing a nested U-slot in the radiating patch. The proposed design operates over the 1.28-6 GHz frequency range, providing an impedance bandwidth of approximately 4.72 GHz. The measured realized gain varies from 2.1 to 5.3 dBi, while the simulated radiation efficiency remains above 80% across most of the operating band. Good agreement between simulated and measured results confirms stable radiation characteristics, demonstrating the suitability of the antenna for wearable ultra-wideband and sub-6 GHz communication systems.

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Mrs. Amalraj Taksala Devapriya

Dr. Savarimuthu Robinson