Infinite-Shaped RFID Coupler for Precise Tag Writing

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Solution Overview

Problem

Existing couplers face challenges in efficiently writing data to a large quantity of radio frequency identification (RFID) transponders without inadvertently writing data to unintended transponders, and configurations that ensure accurate data writing result in inefficiencies due to the need for large spacing between transponders.

Innovation Solution

A coupler design featuring a conductive layer with an infinite shape, dielectric layers, and a ground layer with an aperture, combined with a feed path and controller, ensures precise data writing to individual RFID transponders by confining the signal emission and controlling power levels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If large spacing is provided between RFID transponders to prevent inadvertent data writing, then data writing accuracy is improved, but productivity decreases due to reduced throughput

Engineering Contradiction:

Improvedata writing accuracyVSAvoidthroughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The ground layer incorporates an aperture that creates a localized signal confinement zone. This aperture structure provides different electromagnetic field characteristics in different spatial locations: concentrated field lines within the aperture region for precise targeting, and attenuated field lines outside the aperture to prevent interference with adjacent transponders. This local differentiation of field properties enables accurate data writing to individual transponders while maintaining closer spacing between them.

Inventive Principle:

Principle #3Local quality

2Reliability

If signal emission is confined to prevent leakage to unintended transponders, then data writing accuracy is improved, but the effective writing region size is reduced

Engineering Contradiction:

Improvedata writing accuracyVSAvoidwriting region size

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The aperture in the ground layer manipulates the three-dimensional electromagnetic field distribution. By creating an aperture structure, the patent transforms the two-dimensional planar ground layer into a three-dimensional field control mechanism. The aperture allows vertical field components to pass through while confining lateral field spread, effectively creating a focused beam-like region. This dimensional transformation enables precise spatial control of signal emission without sacrificing overall writing capability.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Productivity

If power level is increased to expand writing region, then productivity is improved, but signal leakage to unintended transponders increases

Engineering Contradiction:

Improvewriting region coverageVSAvoidsignal leakage

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent utilizes parameter changes in the electromagnetic field characteristics by introducing the aperture structure. The aperture modifies key field parameters including field distribution pattern, impedance characteristics, and radiation pattern. By changing these field parameters through the aperture geometry, the system achieves enhanced signal confinement while maintaining adequate power levels for reliable data writing. The aperture acts as a field-shaping element that alters the spatial distribution of electromagnetic energy without requiring excessive power increase.

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

The system enables timely and accurate data writing to multiple RFID transponders with minimal signal leakage to unintended transponders, enhancing efficiency and reducing data writing errors.

Implementation Method 1

Methodology Applied

Scientific EffectElectromagnetic field confinement:

Implementation Method 2

A coupler design featuring a conductive layer with an infinite shape, dielectric layers, and a ground layer with an aperture

Methodology Applied

Scientific EffectDielectric insulation: Dielectric

Implementation Method 3

Methodology Applied

Scientific EffectElectromagnetic filtering: Filter (electronic)

Data Source

PatentUS20250210843A1Infinite shaped coupler

Publication Date: 2025.06.26 HAND HELD PRODS INC

AI summary

An example system is provided. In some embodiments, the system may include a coupler. In some embodiments, the coupler may include a first ground layer. In some embodiments, the coupler may include a conductive layer. In some embodiments, the conductive layer is substantially infinite shaped. In some embodiments, the coupler may include a first dielectric layer positioned between the first ground layer and the conductive layer. In some embodiments, the coupler may include a second ground layer having an aperture. In some embodiments, the coupler may include a second dielectric layer positioned between the conductive layer and the second ground layer. In some embodiments, the system may include a feed path configured to transport a plurality of radio frequency identification transponders through a defined region proximate the coupler. In some embodiments, the system may include a controller.