Antenna Grounding via Housing Conductive Member
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Solution Overview
Problem
Existing electronic devices face challenges in improving antenna performance, particularly in miniaturized forms where antenna placement overlaps noise-emitting components, leading to interference and reduced signal quality.
Innovation Solution
The design incorporates a conductive member that electrically connects the antenna ground to a conductive portion of the housing, creating a noise-releasing path and using a folded antenna structure with a grounding portion of increased width to maintain high input impedance and reduce degradation, while being integrated into a compact housing with support structures to secure the antenna position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna is placed in a miniaturized housing, then the device size is reduced, but the antenna performance deteriorates due to overlap with noise-emitting components
Solution Approach 1:
The antenna system is segmented into distinct functional parts: the antenna element, the grounding portion with increased width, and the conductive member. This segmentation allows the grounding portion to be specifically optimized for noise rejection while the antenna element maintains signal reception functionality, resolving the contradiction between miniaturization and performance.
Solution Approach 2:
The grounding portion is designed with locally increased width compared to the antenna element, creating a region with different electrical characteristics. This local quality change increases input impedance and reduces noise interference at the critical grounding interface, allowing the antenna to maintain performance in a compact housing.
2Reliability
If the grounding portion width is increased, then the input impedance is maintained at high level, but the antenna size increases
Solution Approach 1:
The grounding portion extends in the width dimension rather than increasing the overall antenna length or height. This dimensional approach allows the antenna to maintain a compact form factor while achieving the necessary input impedance through increased grounding width, effectively resolving the size-impedance contradiction.
3Object-affected harmful factors
If the conductive member is added to connect antenna ground to housing, then noise interference is reduced, but the device complexity increases
Solution Approach 1:
The conductive member integrates the antenna grounding function with the housing structure, merging two separate functions into a single component. This reduces the number of discrete parts and simplifies assembly while effectively channeling noise to the housing ground, resolving the contradiction between noise reduction and device complexity.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, acts as a noise-releasing path through the conductive member connection, and serves as the ground reference for the antenna system. This multi-functionality reduces the need for additional dedicated noise-rejection components, simplifying the overall device while maintaining performance.
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 enhances antenna performance by reducing noise interference, allowing for miniaturization and improved signal quality, while simplifying the assembly process and reducing costs through secure and efficient integration within the device.
Implementation Method 1
a conductive member which electrically connects a ground of the antenna and the conductive portion
Data Source
AI summary
According to one embodiment, an electronic apparatus includes a housing having a conductive portion in at least a part of the housing, a component which is accommodated in the housing and emits noise, an antenna which overlaps the component in a thickness direction of the housing, and a conductive member which electrically connects a ground of the antenna and the conductive portion of the housing.