Improving Biomedical Wireless Communication using an Optimal Circular Microstrip Patch Antenna Design

Abstract

Wireless Sensors and Systems Utilizing wireless sensors and systems in biomedical applications enables real-time health monitoring for patients, facilitates implantable medical devices for chronic disease management, and enables remote diagnostics with precision-driven medical equipment. On the other hand, there are challenges like signal weakness, miniaturization limits, and human tissue interference, which require an optimized antenna design to facilitate reliable data competences. The paper presents Design and Optimization of Circular Microstrip Patch Antenna for Biomedical Wireless Communication. This antenna is tailored to operate within the Industrial, Scientific and Medical (ISM) band (2.4 GHz – 2.45 GHz), which is a well-known frequency range dedicated to a myriad of biomedical telemetry applications. By employing a low-loss and biocompatible substrate (Rogers RO3003, polydimethylsiloxane (PDMS)) to preserve system efficiency as tissue has higher absorption, tin as an example of low-loss biocompatible substrate, and sapling as an example of conformed at a cm-level CMPA structure, a compact and conformal CMPA structure is able to be designed. It incorporates a wide-band and low-SAR qualified voltage-and-single-band-established to enhance performance, gain, bandwidth, SAR (specific absorption rate) of the antenna in lossy tissue to meet safe and reliable propagation of radio signals in human’s body. Electromagnetic simulations with CST Microwave Studio and HFSS are performed to obtain optimal performance [12] including a human tissue-equivalent phantom to represent a realistic scenario. To achieve impedance matching and bandwidth enhancement, applies defected ground structures (DGS) and slot loading methods in the study. Moreover, an artificial magnetic conductor (AMC) backing is also studied to suppress the SAR with high radiation efficiency. To validate experimentally, fabrication and testing are performed to compare simulated and measured results for both free space and on-body scenarios. This Dual-Band Radiator demonstrates low return loss greater than 20 dB over the frequency range of interest, bandwidth of greater than 150 MHz and radiation efficiency, >85% making this optimized CMPA a strong contender for biomedical applications, specifically for wearable health monitors, neural implants and bio-signal telemetry for that enhances biopharma's initiative to wear health monitor to prevent the occurrence of disease with their solution to improve the health of patients. The study demonstrates the potential of an improved CMPA to alleviate the challenges of biomedical wireless communication, thereby enabling next-generation implantable and wearable medical devices with enhanced connectivity and patient safety.