MINIATURIZED ANTENNA FOR EMBEDDED MEDICAL ENDOSCOPY DEVICES

Abstract

Wireless Capsule Endoscopy (WCE) systems are transforming gastrointestinal diagnostics by providing non-invasive, real-time visualization of the digestive tract. A pivotal element of these systems is the antenna, which facilitates robust wireless communication between the internal capsule and external monitoring equipment. This study presents the design of a wideband antenna specifically engineered for WCE applications, addressing key challenges such as miniaturization, efficient radiation in lossy biological media, and broad impedance bandwidth. The antenna is designed to operate within the Industrial, Scientific, and Medical (ISM) band (2.4–2.5 GHz), capitalizing on its capability to deliver high data rates while maintaining sufficient tissue penetration. The design incorporates advanced methodologies, utilizing flexible and biocompatible materials to ensure compatibility with the capsule’s curved structure and to uphold patient safety standards. Performance optimization is carried out through numerical simulations based on realistic human tissue phantoms, focusing on parameters such as gain, efficiency, and compliance with Specific Absorption Rate (SAR) limits. Experimental results validate the antenna’s capacity to maintain consistent communication links across different tissue scenarios. The proposed wideband antenna design enhances signal integrity and supports higher data throughput, positioning it as a strong candidate for integration into future WCE platforms.