Conductive Accessory Cleat Antenna for Mobile Device Space Constraints

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Solution Overview

Problem

Mobile computing devices face challenges in accommodating additional radio access technologies due to limited physical space, leading to suboptimal communications performance for additional antenna assemblies and existing components.

Innovation Solution

The implementation of a conductive cleat affixed to the exterior surface of the device housing, which functions as an antenna and couples accessories to the device, while a feed connector electrically connects the cleat to the communications controller within the device interior.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If additional antenna assemblies are deployed in mobile devices to enable additional radio access technologies, then communication functionality is improved, but physical space for existing components is reduced and interference increases

Engineering Contradiction:

Improvecommunication functionalityVSAvoidphysical space

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent moves the antenna assembly from the traditional internal two-dimensional plane to an external three-dimensional extension via the cleat structure. The antenna is positioned on an exterior surface of the device housing, utilizing external space rather than internal space, thereby resolving the space conflict while maintaining communication functionality.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The antenna assembly is segmented from the main device body and mounted on a separate cleat structure. This segmentation allows the antenna to be positioned independently on the exterior surface, separating it from other internal components and reducing interference while preserving device interior space.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If additional antenna assemblies are deployed in mobile devices, then communication functionality is improved, but interference from internal components increases

Engineering Contradiction:

Improvecommunication functionalityVSAvoidinterference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The antenna assembly is extracted from the internal component environment and relocated to an external position on the device housing. This extraction removes the antenna from the harmful electromagnetic environment created by internal components such as processors, memory, and other antennas, thereby reducing interference while maintaining communication functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

3Volume of stationary object

If antenna assemblies are positioned within device interior, then space utilization is maximized, but communication performance deteriorates due to interference and space constraints

Engineering Contradiction:

Improvespace utilizationVSAvoidcommunication performance

Core Design Contradiction:

Volume of stationary objectVSReliability

Solution Approach 1:

The antenna assembly transitions from internal three-dimensional space to external surface mounting. This dimensional change allows the antenna to access external space while maintaining efficient connection to the device through the feed connector, thereby improving communication performance without sacrificing overall space utilization.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The feed connector acts as an intermediary element that bridges the external antenna assembly and the internal device components. This intermediary allows the antenna to be positioned externally for optimal performance while maintaining efficient electrical connection to the device interior, resolving the conflict between space utilization and communication performance.

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 allows for the deployment of antennas outside the device interior, reducing interference from internal components and optimizing space usage, thereby enhancing communications performance.

Implementation Method 1

a conductive cleat affixed to an exterior surface of the device housing and functioning as an antenna

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Implementation Method 2

a feed connector having an exterior end electrically coupled with the antenna element, an interior end electrically coupled with the communications controller, and a body traversing the wall to join the exterior and interior ends

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12212057B2Exterior accessory cleat with integrated antenna

Publication Date: 2025.01.28 ZEBRA TECHNOLOGIES CORP

AI summary

A mobile computing device includes: a display; a device housing supporting the display and having a wall defining an exterior surface; a communications controller supported within a device interior enclosed between the display and the device housing; a cleat affixed to the exterior surface of the wall and configured to couple an accessory to the device housing, the cleat including a conductive antenna element; and a feed connector having an exterior end electrically coupled with the conductive antenna element of the cleat, an interior end electrically coupled with the communications controller, and a body traversing the wall to join the exterior and interior ends.