Design of Wearable Patch Antenna for X-band Applications

This paper presents a wearable microstrip line-fed rectangular patch antenna (WLF_MPA) using a denim substrate designed for X-band applications centered at 8.91 GHz. The antenna operates within a frequency range of 8.72 GHz to 9.09 GHz, offering a radiation efficiency of 70% and a gain of 6.4 dB. The Specific Absorption Rate (SAR) for 1g muscle mass is 0.8912 W/Kg, well within the standard safety limit of 1.6 W/Kg. Using denim as a flexible substrate ensures comfort and durability for wearable applications. These characteristics make the antenna ideal for X-band applications such as industrial monitoring, healthcare, and defense communications.