Mutual Inductance Tuning Coil for NFC Antenna Detuning

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Solution Overview

Problem

Existing Near Field Communication (NFC) antennas in information handling systems are susceptible to detuning due to their environment, requiring custom solutions for different parts or environments, which limits part reuse and increases costs.

Innovation Solution

A mutual inductance tuning coil component comprising a loop antenna mounted on a substrate, positioned proximate to an NFC radiating component, compensates for radiated energy, allowing a common NFC antenna to be reused across different design environments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a common NFC antenna is used across different design environments, then part reuse and cost efficiency are improved, but the antenna performance deteriorates due to detuning from surrounding components

Engineering Contradiction:

Improvepart reuseVSAvoidantenna performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A tuning coil is introduced as an intermediary component between the NFC antenna and surrounding components. The tuning coil compensates for the effects of surrounding components on the NFC antenna, allowing a common NFC antenna to be used across different design environments without performance degradation. The tuning coil acts as a mediator that isolates the antenna from environmental detuning effects.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The tuning coil enables adjustment of the NFC antenna's resonant frequency and impedance parameters to compensate for detuning caused by different surrounding components. By changing the electrical parameters of the antenna system through the tuning coil, optimal performance is maintained across various design environments while using a common antenna design.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If custom NFC antenna solutions are designed for different environments, then antenna performance is maintained, but device complexity and manufacturing costs increase

Engineering Contradiction:

Improveantenna performanceVSAvoidcustom solutions

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The tuning coil is designed as a universal component that can be used with a common NFC antenna across multiple different design environments. Instead of creating custom antenna solutions for each environment, the same antenna paired with an adjustable tuning coil adapts to various surrounding component configurations, reducing device complexity and standardizing the NFC assembly.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If custom NFC antenna solutions are designed for different environments, then antenna performance is maintained, but manufacturing costs increase

Engineering Contradiction:

Improveantenna performanceVSAvoidmanufacturing costs

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The tuning coil enables a common NFC antenna to serve multiple design environments, eliminating the need to manufacture different antenna designs for different applications. This universality reduces tooling costs, simplifies supply chain management, and lowers per-unit manufacturing costs while maintaining antenna performance through adjustable tuning.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Rather than manufacturing different physical antenna designs, the solution allows parameter adjustment of a single antenna design through the tuning coil. This approach reduces manufacturing complexity and costs by standardizing the antenna production while providing environmental adaptation through electrical parameter adjustment rather than physical redesign.

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 mutual inductance tuning coil effectively negates the effects of surrounding components on NFC antenna performance, enhancing antenna stability and allowing for a common NFC antenna solution across various information handling system configurations.

Implementation Method 1

Near Field Communication (NFC) antennas are susceptible to detuning due to their environment

Methodology Applied

Scientific EffectNear Field Communication (NFC): Electromagnetic Induction

Implementation Method 2

A mutual inductance tuning coil component comprising a loop antenna mounted on a substrate, the loop antenna being positioned proximate to an NFC radiating component

Methodology Applied

Scientific EffectMutual inductance: Electromagnetic Induction

Data Source

PatentUS12212081B2Mutual inductance tuning coil for use with information handling systems

Publication Date: 2025.01.28 DELL PROD LP

AI summary

A mutual inductance tuning coil component which includes a substrate; and, a loop antenna mounted on the substrate, the loop antenna being positioned proximate to a Near Field Communication (NFC) radiating component of an information handling system, the loop antenna compensating for the radiated energy generated by the NFC radiating component.