Grounded Conductive Pattern Layout for Camera EMI Shielding

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Solution Overview

Problem

Electromagnetic interference (EMI) occurs between antennas and other electrical constituent elements in electronic devices, leading to degradation of antenna radiation performance and potential malfunction of nearby components.

Innovation Solution

Incorporating a conductive pattern electrically connected to the ground within the electronic device's housing, which overlaps with the camera module and antenna radiator, to absorb electromagnetic waves and reduce interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the number of antennas and electrical constituent elements is increased to expand application range, then functionality is improved, but electromagnetic interference between components increases

Engineering Contradiction:

Improveapplication rangeVSAvoidelectromagnetic interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

A conductive pattern is introduced as an intermediary element between the antenna and camera module. This conductive pattern acts as a mediator that intercepts and redirects electromagnetic waves that would otherwise interfere with the camera module, allowing both the antenna and camera module to coexist without mutual interference

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The harmful electromagnetic waves are extracted from the path between the antenna and camera module by the conductive pattern. The conductive pattern selectively captures and redirects only the interfering electromagnetic waves while allowing other signals to pass through unaffected

Inventive Principle:

Principle #2Taking out (Extraction)

2Adaptability or versatility

If electrical constituent elements are added for various functions while slimming down the device, then functionality is improved, but electromagnetic interference between antenna and other components increases

Engineering Contradiction:

ImprovefunctionalityVSAvoidelectromagnetic interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The conductive pattern is nested within the existing device structure, positioned between the antenna and camera module. This nested configuration allows the EMI shielding function to be integrated into the device without adding external components or increasing device thickness

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The conductive pattern serves as an intermediary layer within the device structure, mediating the electromagnetic interaction between the antenna and camera module while maintaining the compact form factor

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If a conductive pattern is added to reduce electromagnetic interference, then EMI protection is improved, but device complexity increases

Engineering Contradiction:

ImproveEMI protectionVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The conductive pattern is implemented as a thin film or conductive layer rather than a bulky three-dimensional structure. This thin-film implementation provides effective EMI shielding while adding minimal complexity to the device structure and maintaining a sleek profile

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The conductive pattern serves multiple functions: it provides EMI shielding, maintains structural integrity, and can be integrated with existing device layers. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 conductive pattern effectively minimizes EMI between the antenna and camera module, enhancing antenna radiation performance and preventing component malfunctions.

Implementation Method 1

Some of electromagnetic waves, travel toward the camera module, among the electromagnetic waves radiating from the antenna radiator, may flow to the ground through the conductive pattern

Methodology Applied

Scientific EffectElectromagnetic wave absorption: Absorption (EM radiation)

Data Source

PatentUS20230344140A1Electronic device including EMI absorber

Publication Date: 2023.10.26 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device is provided. The electronic device includes a housing including a front surface plate, a rear surface plate, and a side surface portion providing a side surface, a first support positioned between the front surface plate and the rear surface plate and connected to the side surface portion, a display, a wireless communication circuit configured to transmit or receive a signal through an antenna radiator, camera circuitry positioned between the first support and the rear surface plate, and a conductive pattern positioned between the first support and the rear surface plate and at least partially overlapping with the camera circuitry when viewed from a top of the rear surface plate, and electrically connected to a ground of the electronic device, some electromagnetic waves, which travel toward the camera circuitry, among electromagnetic waves radiating from the antenna radiator, flow to the ground through the conductive pattern.