MagneTag RFID Transponder Power Loop for Extended Reading Range
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Solution Overview
Problem
Existing asset management systems using RFID technology face challenges with passive RFID tags' limited range and high costs of active RFID tags, leading to expensive reader infrastructure and high costs for asset tracking.
Innovation Solution
The development of a 'MagneTag' RFID system that uses a wiring loop to generate a magnetic field, allowing RFID tags to receive power and enhance data transmission, effectively increasing reading range to 30 meters while maintaining affordability by using a low-cost production method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If passive RFID transponders are used, then cost is reduced, but reading range is limited to less than one meter
Solution Approach 1:
The patent combines the antenna function with the power reception function into a single integrated component. The antenna on the transponder simultaneously receives electromagnetic energy from the reader and transmits data back, merging the roles that would traditionally require separate components. This integration allows the passive transponder to achieve extended reading range while maintaining its low-cost advantage.
Solution Approach 2:
The patent employs dynamic power management where the transponder adjusts its operation based on received power levels. The system dynamically switches between different transmission modes and power states, allowing the transponder to optimize its performance across varying distances while maintaining affordability through efficient power utilization.
2Length of stationary object
If active RFID transponders are used, then reading range is extended to 20-30 meters, but unit price increases to about 10 euros
Solution Approach 1:
The patent extracts the power source function from the transponder body and implements it through external electromagnetic energy harvesting. By removing the need for an onboard battery and power management circuitry, the system achieves active transponder performance (20-30 meter range) while maintaining the simplicity and low cost of passive transponder design.
Solution Approach 2:
The patent introduces an intermediary electromagnetic field as the power transmission medium between the reader and transponder. This intermediary carries both the power needed to activate the transponder and the data communication signals, eliminating the need for expensive active components on the transponder while achieving extended reading range.
3Reliability
If multiple readers with several channels and antennas are deployed, then coverage is improved, but infrastructure cost and complexity increase
Solution Approach 1:
The patent makes the transponder antenna perform multiple functions simultaneously: receiving power from the reader, detecting the reader's signal, and transmitting data back. This multi-functionality reduces the need for multiple dedicated readers and antennas, simplifying the infrastructure while maintaining comprehensive coverage through the enhanced capabilities of each transponder.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The MagneTag system enables efficient and cost-effective asset tracking with extended reading ranges and flexibility to operate as both active and passive tags, reducing infrastructure costs and improving asset management system affordability.
Implementation Method 1
uses a wiring loop to generate a magnetic field, allowing RFID tags to receive power and enhance data transmission
Implementation Method 2
an electro-magnetic field is emitted by the reader antenna and received by the antenna located on the RFID transponder. The reader sends out a power pulse of, for instance, 134.2 KHz. This power pulse is collected by the antenna in the passive RFID transponder
Data Source
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AI summary
A method for reading a transponder, such as an RFID tag, having an antenna for transmitting data stored on the transponder to a reader, wherein the method comprises the step of providing the transponder with a power receiver, for receiving energy from an energy field and for storing said energy, for enabling enhancement of the transmittal of data, using the energy stored in the power receiver.