Antenna-Boosting Case Coupling for Mobile Devices

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Solution Overview

Problem

Mobile device housings often adversely affect the efficiency of transmissive communication by inducing out-of-phase surface currents in antennas, leading to reduced antenna performance and communication efficiency.

Innovation Solution

Incorporating a case coupling device that provides electrical coupling between the circumferential case element and the ground reference, allowing for selective segmentation of surface currents to align with antenna frequencies, thereby enhancing antenna radiation and transmissive performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a conductive housing is used for mechanical strength and design flexibility, then housing strength and design versatility are improved, but antenna radiation efficiency deteriorates due to induced out-of-phase surface currents

Engineering Contradiction:

Improvehousing strengthVSAvoidantenna radiation efficiency

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The conductive housing is segmented into multiple electrical sections using electrically insulating barriers. These barriers divide the housing into distinct regions that can be independently controlled electrically, preventing the formation of continuous out-of-phase surface currents while maintaining the mechanical integrity and design flexibility of the conductive material.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Electrically insulating barriers are introduced as intermediary elements between different sections of the conductive housing. These barriers act as mediators that electrically isolate sections while allowing mechanical continuity, thereby preventing harmful current paths without compromising structural strength or design versatility.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If a continuous conductive housing is used for manufacturing simplicity, then ease of manufacture is improved, but antenna performance deteriorates due to harmful surface currents

Engineering Contradiction:

Improveease of manufactureVSAvoidout-of-phase surface currents

Core Design Contradiction:

Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The housing manufacturing process incorporates electrically insulating barriers that segment the conductive material into isolated sections. This segmentation prevents the formation of continuous harmful surface currents while maintaining a relatively simple manufacturing process through techniques such as injection molding, co-molding, or adhesive bonding of the insulating elements.

Inventive Principle:

Principle #1Segmentation

3Strength

If metal or metallic case materials are used for durability and aesthetics, then housing strength and appearance are improved, but communication range deteriorates due to reduced antenna efficiency

Engineering Contradiction:

Improvehousing strengthVSAvoidcommunication range

Core Design Contradiction:

StrengthVSLength of moving object

Solution Approach 1:

Metallic case materials are segmented into electrically isolated sections using insulating barriers. This segmentation prevents the formation of continuous surface currents that would otherwise reduce antenna efficiency and communication range, while maintaining the durability and aesthetic qualities of the metal housing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Electrically insulating barriers serve as intermediary elements within the metallic housing structure. These intermediaries electrically isolate different sections of the metal case, preventing harmful current paths that would degrade communication performance, while allowing the metal to maintain its structural and aesthetic functions.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 solution boosts antenna radiation efficiency by up to 10 dB and maintains or improves communication range even with metal or metallic case materials, while allowing for flexible housing designs and modular assembly.

Implementation Method 1

a coupling device electrically coupled to the circuitry to provide the ground reference over an elongate segment of the conductive housing element

Methodology Applied

Scientific EffectElectrical coupling: Conduction (electrical)

Implementation Method 2

an antenna element in communication with the circuitry for transmissive communication to transmit or receive transmissive communication

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Data Source

PatentUS10461402B2Mobile device with antenna-boosting case coupling

Publication Date: 2019.10.29 INTEL CORP

AI summary

An mobile device may include circuitry for transmissive communication and to operate with a ground reference. An antenna element may be in communication with the circuitry for transmissive communication to transmit or receive transmissive communication. A housing may house the circuitry for transmissive communication and the antenna element and may include a conductive circumferential case element. A coupling device may be electrically coupled to provide the ground reference over an elongate segment of the conductive circumferential case element.