Design of an UWB Conformal Antenna for Wireless Capsule Endoscopy

This paper introduces a novel, compact antenna for Wireless Capsule Endoscopy (WCE), operating at the 915 MHz, Industrial, Scientific, and Medical (ISM) frequency band. The suggested antenna achieves Ultra Wide-Band (UWB) operation. This design allows the antenna to operate across a broad frequency range from 0.59 to 1.36 GHz, with a fractional bandwidth of 96.25% centered at 0.8 GHz. The antenna's large bandwidth is able to provide higher channel capacity and address frequency detuning issues. A compact design, measuring 30.5mm x 9mm x 0.04mm, is achieved by implementing a meander path shape. This design achieves an average peak gain of up to - 45.93 dBi. The specific absorption rate (SAR) is evaluated to be 0.0002W/Kg. The findings demonstrate that, under various scenarios, the designed antenna maintains communication at distances exceeding 6 meters, with a 15 dB margin.