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Updated: Aug 29, 2025

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

Self-Sustainable Biomedical Devices Powered by RF Energy: A Review.

Hussein Yahya Alkhalaf¹, Mohd Yazed Ahmad¹, Harikrishnan Ramiah²

¹Department of Biomedical Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia.

Sensors (Basel, Switzerland)

|September 9, 2022

Summary

This summary is machine-generated.

Radiofrequency energy harvesting (RFEH) offers a promising solution for powering wearable and implantable medical devices (IMDs). This review explores RFEH advancements, challenges, and future opportunities for reliable device operation.

Keywords:

RF energy harvesting implantable medical devices rectenna wearable medical devices wireless power transfer

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Last Updated: Aug 29, 2025

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Area of Science:

Biomedical Engineering
Electrical Engineering
Energy Harvesting

Background:

Wearable and implantable medical devices (IMDs) are crucial for personalized health monitoring and therapy.
Reliable, long-term power supply remains a significant challenge for these devices.
Radiofrequency energy harvesting (RFEH) presents a potential solution for powering IMDs.

Purpose of the Study:

To review the challenges and milestones in energizing wearable and IMDs using RFEH.
To highlight key integrating frontend blocks for RFEH systems.
To explore the advantages, bottlenecks, and applications of RFEH in medical devices.

Main Methods:

Review of recent developments in RFEH technology for medical applications.
Analysis of integrating frontend blocks: antenna design, matching networks, and rectifier topologies.
Evaluation of system elements and characteristics for optimized RFEH operation.

Main Results:

RFEH technology shows significant potential for powering wearable and implantable medical devices.
Key components like antennas, matching networks, and rectifiers are critical for RFEH system performance.
Various applications of RFEH in medical devices have been identified and reviewed.

Conclusions:

RFEH is a viable technique for sustainable power in wearable and IMDs.
Further research is needed to address existing gaps and optimize RFEH systems.
Future opportunities lie in enhancing efficiency and exploring novel applications of RFEH.