Active RFID Transponder with Galvanic Cell Antennas
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Solution Overview
Problem
Conventional active RFID transponders are rigid and large due to their battery size, making them unsuitable for integration into rubber products like tires, where flexibility is required.
Innovation Solution
An active RFID transponder with two antennas made of different metals acting as a galvanic cell battery, embedded in a rubber matrix with an ionic liquid, allowing for flexible configuration and integration into rubber products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a conventional battery is used to power the active RFID transponder, then the transponder can maintain functionality over a longer period, but the transponder becomes larger and more rigid
Solution Approach 1:
The patent combines the battery function with the antenna structure by using two antennas made of different metals (e.g., zinc and copper) that form a galvanic cell when in contact with the ionic liquid. This merging of power supply and communication functions eliminates the need for a separate battery, achieving long-term functionality through electrochemical reactions while maintaining a compact, flexible form factor suitable for rubber product integration.
Solution Approach 2:
The patent uses composite material structures where the antenna elements are made of different metals with distinct electrochemical properties. The zinc antenna serves as the anode and the copper antenna as the cathode, creating a galvanic cell within the rubber matrix filled with ionic liquid. This composite approach enables both power generation and electromagnetic functionality in a unified structure.
2Duration of action of moving object
If a conventional battery is used to power the active RFID transponder, then the transponder can maintain functionality over a longer period, but the transponder loses flexibility
Solution Approach 1:
The patent merges the battery function with the antenna structure by using two antennas made of different metals (e.g., zinc and copper) that form a galvanic cell when in contact with the ionic liquid. This merging of power supply and communication functions eliminates the need for a separate battery, achieving long-term functionality through electrochemical reactions while maintaining a compact, flexible form factor suitable for rubber product integration.
Solution Approach 2:
The patent changes the physical state and composition of the electrolyte from conventional solid or gel battery components to a liquid ionic liquid embedded in the rubber matrix. This parameter change enables the power supply system to conform to the flexible rubber substrate, maintaining flexibility while providing sustained electrochemical energy conversion over extended periods.
3Length of moving object
If the transponder is made smaller to improve flexibility, then it can be integrated into rubber products, but the battery capacity is reduced
Solution Approach 1:
The patent makes the antenna structure serve multiple functions: it acts as both the electromagnetic radiation element for RFID communication and the electrochemical power source through the galvanic cell. This multi-functionality eliminates the need for separate battery compartments, allowing the entire transponder to be miniimized while maintaining both communication capability and power supply duration in a compact, flexible form.
Solution Approach 2:
The patent combines the battery function with the antenna structure by using two antennas made of different metals (e.g., zinc and copper) that form a galvanic cell when in contact with the ionic liquid. This merging of power supply and communication functions eliminates the need for a separate battery, achieving long-term functionality through electrochemical reactions while maintaining a compact, flexible form factor suitable for rubber product integration.
4Length of moving object
If two antennas of different metals are used to create a galvanic cell, then the transponder becomes more flexible and smaller, but the device complexity increases
Solution Approach 1:
The patent makes the antenna structure serve multiple functions: it acts as both the electromagnetic radiation element for RFID communication and the electrochemical power source through the galvanic cell. This multi-functionality eliminates the need for separate battery compartments, allowing the entire transponder to be miniimized while maintaining both communication capability and power supply duration in a compact, flexible form.
Solution Approach 2:
The patent combines the battery function with the antenna structure by using two antennas made of different metals (e.g., zinc and copper) that form a galvanic cell when in contact with the ionic liquid. This merging of power supply and communication functions eliminates the need for a separate battery, achieving long-term functionality through electrochemical reactions while maintaining a compact, flexible form factor suitable for rubber product integration.
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
Enables smaller, more flexible active RFID transponders that can be integrated into rubber products, extending their application range and maintaining functionality over a longer period.
Implementation Method 1
the first antenna and the second antenna comprise different metals in order to provide an electrode potential between the first antenna and the second antenna
Implementation Method 2
the two antennas not only serve to receive and/or transmit electromagnetic waves, but also simultaneously function as a battery
Implementation Method 3
the rubber matrix being filled with an ionic liquid
Implementation Method 4
the two antennas not only serve to receive and/or transmit electromagnetic waves
Implementation Method 5
the microchip, the first antenna, and the second antenna are embedded in a rubber matrix, which allows for a flexible design
Data Source
Figure 1~2
Figure 3
AI summary
The present invention relates to an active RFID transponder comprising a microchip, a first antenna, and a second antenna connected to the microchip via a signal, wherein the microchip, the first antenna, and the second antenna are embedded in a rubber matrix, the rubber matrix being filled with an ionic liquid, and wherein the first antenna and the second antenna comprise different metals in order to provide an electrode potential between the first antenna and the second antenna. The present invention further relates to an elastomeric product comprising the active RFID transponder according to the invention, and to the use of the active RFID transponder according to the invention in an elastomeric product.