Speaker Housing Shielding Structure for Antenna EMI Reduction
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Solution Overview
Problem
The miniaturization of electronic devices poses a challenge as the proximity of speakers and antennas leads to electromagnetic interference (EMI), which deteriorates the performance of wireless communication and sensing components.
Innovation Solution
The integration of a noise reduction member with a conductive material on the outer surface of the speaker housing, which includes a shielding member and a conductive extension part grounded to discharge electromagnetic noise, reduces EMI to the adjacent antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the speaker and antenna are disposed adjacent to each other inside the housing for miniaturization, then the size of the electronic device is reduced, but electromagnetic interference occurs from the speaker to the antenna causing performance deterioration
Solution Approach 1:
A noise reduction member comprising a shielding member and conductive extension part is introduced as an intermediary component between the speaker and antenna. The shielding member is positioned on the speaker housing outer surface, and the conductive extension part extends toward the antenna to intercept and redirect electromagnetic noise, thereby protecting the antenna from interference while maintaining close proximity of components for miniaturization
Solution Approach 2:
The harmful electromagnetic noise is extracted and redirected away from the antenna through the conductive extension part. The extension part acts as a separate functional element that extracts the noise path from the direct speaker-to-antenna coupling, channeling the electromagnetic interference away from the sensitive antenna region
2Object-affected harmful factors
If a noise reduction member with conductive material is added to the speaker housing, then electromagnetic interference is reduced, but the device complexity increases
Solution Approach 1:
The noise reduction member is merged with the speaker housing structure. The shielding member is integrated onto the outer surface of the speaker housing, and the conductive extension part is formed as a continuous piece with the shielding member, combining multiple functions (shielding, grounding, and structural support) into a single integrated component rather than separate parts
Solution Approach 2:
The noise reduction member serves multiple functions simultaneously: the shielding member provides electromagnetic shielding, the conductive extension part provides a grounding path, and the integrated structure also serves as part of the speaker housing assembly. This multi-functionality reduces the need for additional separate components
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 effectively minimizes electromagnetic interference, thereby improving the performance of the antenna and maintaining the miniaturization and mobility of electronic devices.
Implementation Method 1
Electromagnetic noise generated from the voice output device may cause electromagnetic interference (EMI) to the adjacent antenna during the operation of the speaker
Implementation Method 2
including the conductive material configured to surround an outer perimeter of the speaker hole on the outer surface of the speaker housing, and a conductive extension part formed by extension of the conductive material from the shielding member and having an end to be grounded
Data Source
AI summary
An electronic device including a noise reduction member is disclosed with a speaker and an antenna. The speaker includes a speaker core for generating sound in a first direction; a speaker housing at least partially enclosing the exterior of the speaker core and including a speaker hole positioned to overlap with the speaker core with respect to the first direction; and a noise reduction member including a conductive material and positioned on the outer surface of the speaker housing. The noise reduction member includes a shielding member having an opening on a surface facing perpendicularly to the first direction, the region at least partially overlapping the speaker core. The shielding member includes the conductive material surrounding the outer perimeter of the speaker hole on the outer surface of the speaker housing; and a conductive extension part formed by extension of the conductive material from the shielding member.