Float Ground Antenna for Metallic Frame Devices

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Solution Overview

Problem

The degradation of antenna radiation performance due to the application of metallic frame structures in electronic devices, which reduces antenna mounting space and increases the risk of electric shock when the external metallic frame is connected to an internal ground, especially in MIMO environments like LTE services.

Innovation Solution

A technique involving a substrate with a ground portion, an external metallic frame with a float ground portion disconnected from the substrate, and radiators electrically connected to the float ground portion, allowing the external metallic frame to operate as an antenna radiator while preventing radiation degradation and electric shock risks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If an external metallic frame structure is applied to the electronic device, then the exterior design and structural stability are improved, but the antenna radiation performance deteriorates due to reduced antenna mounting space

Engineering Contradiction:

Improveexterior designVSAvoidantenna radiation performance

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

The patent divides the antenna system into multiple segments: a first antenna located in a first region and a second antenna located in a second region. This segmentation allows each antenna to be positioned in optimal locations away from the metallic frame's harmful effects, maintaining radiation performance while preserving the metallic exterior design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent utilizes the third dimension (thickness/depth) by positioning antennas at different depths within the device structure. The first and second antennas are arranged in different regions that extend in the thickness direction, allowing them to be placed in locations where they can operate effectively without being blocked by the metallic frame

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Stability of the object's composition

If the external metallic frame is connected to an internal ground, then the structural stability is improved, but the risk of electric shock increases

Engineering Contradiction:

Improvestructural stabilityVSAvoidelectric shock risk

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an intermediary isolation layer between the metallic frame and the internal ground connection. This isolation layer acts as a mediator that prevents direct electrical contact, thereby eliminating the electric shock risk while maintaining the structural stability provided by the metallic frame connection

Inventive Principle:

Principle #24Intermediary (Mediator)

3Weight of stationary object

If antenna mounting space is reduced due to metallic frame application, then the device weight and thickness are reduced, but the radiation performance of individual antennas deteriorates

Engineering Contradiction:

Improvedevice weightVSAvoidantenna radiation performance

Core Design Contradiction:

Weight of stationary objectVSReliability

Solution Approach 1:

The patent segments the antenna system into multiple antennas distributed in different regions. This segmentation allows the device to maintain reduced weight and thickness while ensuring that each antenna has sufficient space in its specific region to achieve good radiation performance

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by creating different spatial characteristics in different regions of the device. Each region is designed with specific properties that are optimal for antenna operation, allowing antennas to achieve good radiation performance in their respective local environments while the overall device maintains reduced weight and thickness

Inventive Principle:

Principle #3Local quality

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 maintains antenna performance without degrading radiation and reduces the risk of electric shock, ensuring stability for external connectors like ear jack and USB connectors.

Implementation Method 1

at least one radiator electrically connected to the float ground portion. Upon being fed with power, the at least one radiator may operate as an antenna radiator, or a section of the external metallic frame may operate as the antenna radiator

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Data Source

PatentUS10199719B2Antenna and electronic device having the same

Publication Date: 2019.02.05 SAMSUNG ELECTRONICS CO LTD

AI summary

An antenna of an electronic device is provided. The antenna includes a substrate including a ground portion, an external metallic frame of the electronic device, a float ground portion arranged to be connected to the external metallic frame in a state of being disconnected from the substrate, and at least one radiator electrically connected to the float ground portion. Upon being fed with power, the at least one radiator may operate as an antenna radiator, or a section of the external metallic frame may operate as the antenna radiator.