RFID Antenna Assembly With Eddy Current Trap for Adjacent Tag Detection

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Solution Overview

Problem

Existing RFID systems in processing systems are static and require extensive modifications to produce different products, limiting their configurability and efficiency due to non-reconfigurable devices and processes.

Innovation Solution

The implementation of an RFID antenna assembly with a loop antenna, capacitive components, and an eddy current trap, along with a magnetic field focusing assembly using a split ring resonator, allows for the detection of specific RFID tags and enables RFID-based actuation, enhancing the system's ability to differentiate between adjacent tags and adjust impedance for improved performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If processing systems are made reconfigurable to produce different products, then product versatility is improved, but system complexity increases

Engineering Contradiction:

Improveproduct versatilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent utilizes the eddy current trap to modify electromagnetic field parameters, enabling the RFID system to differentiate between adjacent tags. This parameter-based differentiation allows the processing system to identify and respond to different RFID tags without requiring complex mechanical or electrical reconfiguration, thus improving product versatility while maintaining system simplicity.

Inventive Principle:

Principle #35Parameter changes

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 configuration enables more efficient and flexible product generation by allowing the RFID system to accurately detect and differentiate RFID tags, reducing contamination risks and improving the overall processing system's configurability and efficiency.

Implementation Method 1

an eddy current trap positioned a predetermined distance from the loop antenna assembly

Methodology Applied

Scientific EffectEddy currents: Eddy Currents

Implementation Method 2

an inductive component including a loop antenna assembly

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 3

at least one capacitive component coupled to the inductive component

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 4

a magnetic field focusing assembly using a split ring resonator

Methodology Applied

Scientific EffectMagnetic field focusing: Magnetic Field

Data Source

PatentUS9614285B2RFID system with an eddy current trap

Publication Date: 2017.04.04 DEKA PRODUCTS LP

AI summary

An RFID antenna assembly configured to be energized with a carrier signal is disclosed. The RFID antenna assembly includes an inductive component including a loop antenna assembly, at least one capacitive component coupled to the inductive component, and an eddy current trap positioned a predetermined distance from the loop antenna assembly.