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Related Experiment Video

Updated: Jun 15, 2026

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System

Published on: June 13, 2010

Highly sensitive passive radio frequency identification based sensor systems.

J Wissenwasser¹, M Vellekoop, R Heer

¹Nano-Systems, AIT Austrian Institute of Technology GmbH, 1220 Wien, Austria.

The Review of Scientific Instruments

|March 3, 2010

Summary

This study introduces a novel battery-free sensor platform using radio frequency identification (RFID) technology. It enables interference-free measurements by temporarily disabling the RFID field, powering sensors with harvested energy.

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Published on: February 16, 2018

Area of Science:

Sensor Technology
Biotechnology
Electrical Engineering

Background:

Radio Frequency Identification (RFID) technology enables passive tags to be powered by a reader's RF field.
Existing sensor platforms may face limitations due to continuous RF field interference during measurements.
Battery-powered sensors can be impractical in certain environments or for long-term monitoring.

Purpose of the Study:

To present a novel RFID-based sensor platform.
To enable interference-free measurements by controlled RF field blanking.
To facilitate impedance measurements on microbiological cell cultures.

Main Methods:

Development of a passive RFID tag with an energy harvesting system.
Implementation of a mechanism for controlled RF field blanking.
Integration of sensor electronics capable of stable voltage supply and power delivery (25 mW for 100 ms).

Main Results:

The developed tag successfully harvests energy from the RF field.
The system enables a blanking period of the RF field for interference-free measurements.
The tag electronics are supplied with a stable voltage, providing 25 mW for 100 ms.
The battery-free tags are suitable for impedance measurements on microbiological cell cultures.

Conclusions:

The novel RFID sensor platform offers a battery-free solution for impedance measurements.
The controlled RF field blanking ensures measurement integrity, even in harsh environments.
This technology has potential applications in microbiological studies and challenging conditions.