Multi-Node Passive RFID Tag for Reliable Data Transmission
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Solution Overview
Problem
Current RFID tags, particularly passive tags, suffer from low bandwidth and high failure rates in data transmission, while active tags are expensive and require a power source, necessitating a solution that enhances performance without the need for local power.
Innovation Solution
The implementation of RFID tags with multiple radio frequency network nodes on a substrate, allowing for coordinated functionality, redundancy, and multi-frequency capabilities, which enables improved data transmission and memory management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive RFID tags are used, then cost is reduced and no power source is needed, but data transmission bandwidth is low and failure rate is high
Solution Approach 1:
The RFID tag is divided into multiple independent RF network nodes (first node, second node, third node) that can operate semi-independently. Each node has its own transceiver and can communicate with readers, allowing the system to achieve higher reliability through redundancy while maintaining passive operation without local power sources.
Solution Approach 2:
Multiple RF network nodes are combined within a single passive RFID tag substrate, creating a multi-node collaborative system. The nodes share common resources (antenna, passive power harvesting) while providing enhanced collective functionality that exceeds what a single node could achieve, resolving the contradiction between reliability and bandwidth.
2Reliability
If active RFID tags are used, then data transmission bandwidth and reliability are improved, but cost increases and local power source is required
Solution Approach 1:
The passive RFID tag nodes harvest energy selflessly from the electromagnetic field of external readers through electromagnetic induction. This self-powered operation eliminates the need for local batteries or power sources while maintaining reliable data transmission, allowing the system to achieve active-tag-like performance without active-tag energy requirements.
Solution Approach 2:
The patent replaces the mechanical/chemical power storage system (batteries in active tags) with an electromagnetic field-based energy harvesting system. Multiple passive nodes collectively harvest and utilize RF energy from readers, substituting the need for local power sources while maintaining transmission reliability.
3Reliability
If multiple RF network nodes are added to enhance performance, then memory capacity and reliability increase, but device complexity increases
Solution Approach 1:
Each RF network node in the multi-node tag is designed with universal functionality, including transceiver capabilities, memory storage, and coordination functions. This multi-functionality allows nodes to be interchangeable and reduces overall system complexity by avoiding specialized components, as each node can perform multiple roles within the network.
Solution Approach 2:
The patent uses identical or similar RF network node designs that can be replicated and mounted on the substrate. This copying approach simplifies manufacturing and system design by using standardized modules, reducing the complexity that would otherwise arise from designing and integrating multiple different types of components.
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 enhances the performance of RFID tags to match that of active tags without the need for a power source, providing robustness, increased memory, and efficient data transmission across various environments.
Implementation Method 1
mounting a plurality of RF network nodes on the RFID tag substrate; and coordinating functionality among the plurality of RF network nodes
Data Source
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AI summary
In embodiments of the present invention improved capabilities are described for a Radio Frequency ID (RFID) tag that contains multiple Radio Frequency (RF) network nodes that provide enhanced memory capabilities, redundant functionality, and multiple frequency capabilities to the RFID tag using an inter-RF network node communication connection. The inter-RF network node communication may allow the coordination of RFID tag memory and functionality.