Miniaturized Antenna Array for Radio Frequency Authentication

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Solution Overview

Problem

Counterfeiting poses significant challenges across various industries, including financial, software, pharmaceutical, and entertainment sectors, as existing technologies lack effective methods to guarantee the authenticity of objects and trace the origin of counterfeit items.

Innovation Solution

Radio frequency certificates of authenticity (RFCOAs) and associated scanners, which utilize miniaturized antenna elements to generate a unique electromagnetic fingerprint for items, making it computationally infeasible to fake or counterfeit, and ensuring authenticity through a combination of folding and meandering antenna patch components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional authentication methods are used, then implementation is simple, but authenticity cannot be guaranteed and counterfeiting is easy

Engineering Contradiction:

Improveauthenticity guaranteeVSAvoidauthentication system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces traditional mechanical or visual authentication methods with electromagnetic field-based authentication. The RFCOA uses unique electromagnetic fingerprints generated by antenna elements to authenticate items, substituting physical inspection or manual verification with automated electromagnetic detection that is much harder to counterfeit.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary authentication system consisting of the RFCOA attached to items and the scanner that reads electromagnetic fingerprints. This intermediary layer between the item and the authentication process enables reliable verification without requiring direct physical inspection or complex manual procedures.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If electromagnetic fingerprints are used for authentication, then counterfeiting becomes computationally infeasible, but the scanner size increases

Engineering Contradiction:

Improvecounterfeiting resistanceVSAvoidscanner area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent divides the scanner into multiple antenna elements arranged in an array, where each element can independently detect electromagnetic signals. This segmentation allows the scanner to achieve high authentication reliability through multiple measurement points while keeping individual element sizes small, thereby reducing the overall scanner footprint.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses electromagnetic field detection in three-dimensional space around the item, rather than requiring a large planar scanning surface. By utilizing the spatial distribution of electromagnetic fields and multiple antenna elements positioned in different orientations, the system achieves high security authentication within a compact volume.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Area of stationary object

If miniaturized antenna elements are used, then scanner area is reduced, but manufacturing precision requirements increase

Engineering Contradiction:

Improvescanner areaVSAvoidantenna element fabrication precision

Core Design Contradiction:

Area of stationary objectVSManufacturing precision

Solution Approach 1:

The patent optimizes the electromagnetic design parameters of the antenna elements to achieve resonance at specific frequencies while maintaining compact dimensions. By carefully selecting operating frequencies and adjusting antenna geometry parameters, the system achieves effective authentication with miniaturized elements that can be manufactured with standard precision tolerances.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite structures for the antenna elements, combining different materials with complementary electromagnetic properties. This allows the miniaturized antenna elements to achieve the required electromagnetic performance while being manufacturable with conventional techniques and tolerances.

Inventive Principle:

Principle #40Composite materials

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 RFCOAs provide a secure and cost-effective means to verify the authenticity of items by generating a unique electromagnetic fingerprint, making it difficult for adversaries to replicate, thus reducing counterfeiting and ensuring the integrity of products.

Implementation Method 1

an array of miniaturized antenna elements in an RFCOA scanner occupies an area smaller than a credit card yet obtains a unique electromagnetic fingerprint from an RFCOA

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Data Source

PatentUS7659851B2Radio frequency certificates of authenticity and related scanners

Publication Date: 2010.02.09 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

Radio frequency certificates of authenticity (RFCOAs) and associated scanners are presented. In one implementation, an array of miniaturized antenna elements in an RFCOA scanner occupies an area smaller than a credit card yet obtains a unique electromagnetic fingerprint from an RFCOA associated with an item, such as the credit card. The antenna elements are miniaturized by a combination of both folding and meandering the antenna patch components. The electromagnetic fingerprint of an exemplary RFCOA embeddable in a credit card or other item is computationally infeasible to fake, and the RFCOA cannot be physically copied or counterfeited based only on possession of the electromagnetic fingerprint.