Multi-Magnetic Loop Antenna with Single Feed for Parallel Loops

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Solution Overview

Problem

Portable wireless devices face space, cost, and complexity challenges due to dual antenna configurations required for multiple frequency bands, as existing electric field antennas are sensitive to dielectric changes and require additional components and feed lines.

Innovation Solution

A multi-loop antenna configuration with at least two magnetic loop antennas electrically connected in parallel, driven by a single feed line, which reduces component count, space consumption, and complexity while maintaining efficiency across different frequency bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If dual antenna configurations are used for multiple frequency bands, then frequency band coverage is improved, but device space and complexity increase

Engineering Contradiction:

Improvefrequency band coverageVSAvoiddevice space

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent combines multiple magnetic loop antennas into a single integrated structure where loops are electrically connected in parallel and share a common feed line. This merging approach allows the antenna system to support multiple frequency bands while occupying minimal device space, as the loops are coupled together rather than being separate physical entities.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The magnetic loop antenna structure is designed to perform multiple functions simultaneously - it can operate across different frequency bands (dual-band or multi-band) using a single antenna system. The parallel-connected loops enable the same physical structure to resonate at multiple frequencies, providing universal communication capability without requiring separate antennas for each band.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If dual antenna configurations are used for multiple frequency bands, then frequency band coverage is improved, but device complexity and cost increase

Engineering Contradiction:

Improvefrequency band coverageVSAvoidantenna system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges multiple antenna functions into a single integrated magnetic loop structure with parallel-connected loops. This consolidation eliminates the need for separate feed lines, mounting structures, and tuning components for each antenna, thereby reducing overall system complexity and component count while maintaining multi-band operational capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single magnetic loop antenna system is designed to provide universal functionality across multiple frequency bands through its parallel loop configuration. This multi-functional design eliminates the need for multiple specialized antennas, simplifying the overall antenna system architecture and reducing design, manufacturing, and maintenance complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If electric field antennas are used, then antenna performance is achieved, but sensitivity to dielectric changes increases

Engineering Contradiction:

Improveantenna performanceVSAvoiddielectric sensitivity

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent transitions from electric field antenna operation to magnetic loop antenna operation, fundamentally changing the electromagnetic field parameter being utilized. Magnetic loop antennas rely on magnetic field circulation within the loop structure, which is less susceptible to dielectric constant variations in surrounding materials compared to electric field antennas. This parameter change enhances reliability in devices with varying dielectric environments.

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 multi-loop antenna configuration effectively transmits and receives signals over predetermined frequency bands with reduced space and cost, maintaining high efficiency and insensitivity to dielectric changes, making it suitable for mobile applications.

Implementation Method 1

The at least two magnetic loop antennas each are configured to transmit and receive signals over predetermined frequency bands

Methodology Applied

Scientific EffectElectromagnetic resonance: Resonance

Implementation Method 2

a single feed line configured to drive both of the at least two magnetic loop antennas

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS10454170B2Multi-magnetic loop antenna with a single feed to parallel loops

Publication Date: 2019.10.22 KONINKLIJKE PHILIPS NV

AI summary

A device (502) includes a multi-loop antenna (516) with at least two magnetic loop antennas (602, 604) electrically connected in parallel. The at least two magnetic loop antennas each are configured to transmit and receive signals over predetermined frequency bands. The device further includes a single feed line (524) configured to drive both of the at least two magnetic loop antennas and a wireless communication component (510) configured to drive the single feed line. A method includes receiving a first activation signal for a first magnetic loop antenna of at least two magnetic loop antennas electrically connected in parallel, feeding the first magnetic loop antenna with a feed line, receiving a second activation signal for a second magnetic loop antenna of the at least two magnetic loop antennas electrically connected in parallel, and feeding the second magnetic loop antenna with the same feed line.