Biodegradable RFID Identifier With Capacitive Antenna Coupling
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Solution Overview
Problem
Existing RFID identifiers face challenges in transitioning to environmentally friendly materials due to the need for plastic substrates and crimp connections, which are difficult to implement without plastics.
Innovation Solution
The use of biodegradable substrates, such as those made from non-plastic biodegradable fibers and bioplastics, combined with capacitive coupling of coil antenna ends and bridge ends, eliminates the need for crimp connections and reduces plastic usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If crimp connections are used to connect the bridge and antenna, then electrical connection is achieved, but plastic substrate is required which conflicts with environmentally friendly materials
Solution Approach 1:
The patent replaces the mechanical crimp connection system with a capacitive coupling system. Instead of using physical contact through crimp connections that require plastic substrates, the invention uses electrical field coupling between the bridge and antenna ends, eliminating the need for plastic materials while maintaining electrical connection functionality.
Solution Approach 2:
The patent introduces an intermediary dielectric layer between the bridge and antenna ends to enable capacitive coupling. This intermediary element allows electrical connection through field interaction rather than direct mechanical contact, solving the contradiction between electrical connection and plastic-free material requirements.
2Reliability
If crimp connections are used to connect the bridge and antenna, then electrical connection is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces complex mechanical crimp connection manufacturing processes with simpler capacitive coupling. The bridge and antenna ends are positioned close together with a dielectric layer between them, eliminating the need for complex crimping operations and reducing manufacturing steps while achieving reliable electrical connection.
3Ease of manufacture
If plastic substrate is used, then crimp connection is enabled, but environmental friendliness is compromised
Solution Approach 1:
The patent eliminates the mechanical crimp connection system that requires plastic substrates by implementing capacitive coupling. This allows the use of environmentally friendly non-plastic substrates while maintaining ease of manufacture through simplified production processes.
Solution Approach 2:
The patent changes the electrical connection mechanism from mechanical contact to electrical field coupling. This parameter change in the connection method allows elimination of plastic materials while maintaining manufacturing ease, as the capacitive coupling can be achieved through simple positioning and dielectric layer application.
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
This approach allows for the production of RFID identifiers with minimal plastic content, utilizing two-layer structures and avoiding complex manufacturing methods, while maintaining functionality and durability.
Implementation Method 1
The first end of the coil antenna is capacitively coupled to the first end of the bridge and the second end of the coil antenna is capacitively coupled to the second end of the bridge
Implementation Method 2
a coil antenna on the first surface of the substrate and an integrated circuit on a chip coupled to the coil antenna
Data Source
Figure 1
Figure 2a
Figure 2b~2c
AI summary
An RFID identifier (1) comprises a substrate (2) having a first surface and a second surface, a coil antenna (4) on the first surface of the substrate (2) and an integrated circuit on a chip (7) coupled to the coil antenna (4). The substrate (2) comprises biodegradable material. The first end and the second end of the coil antenna (4) are connected by a bridge (8). The first end of the coil antenna is coupled to the first end of the bridge and the second end of the coil antenna is coupled to the second end of the bridge. The coil antenna (4) and the bridge (8) are electrically isolated between the first and the second end of the bridge. At least either of the first end of the coil antenna or the second end of the coil antenna is capacitively coupled to the corresponding end of the bridge.