Wearable Antenna Ground Loop Structure for Noise Isolation
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Solution Overview
Problem
The performance of antennas in electronic devices is degraded due to electronic components adjacent to the housing forming the antenna and connecting members that operatively connect these components, leading to electromagnetic noise and unwanted parasitic components.
Innovation Solution
A wearable electronic device is designed with a printed circuit board that includes a ground portion and a connecting member with an extension portion along the side wall, a first portion connected to the printed circuit board, and a second portion connected to a conductive region of the printed circuit board, forming an electrical loop structure that reduces noise and parasitic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electronic components are disposed adjacent to the housing and connected by connecting members, then device functionality is enhanced, but antenna performance is degraded due to electromagnetic noise and parasitic components
Solution Approach 1:
A ground isolation structure is introduced as an intermediary element between the connecting member and the antenna housing. This ground isolation structure includes a ground portion connected to ground and an isolation portion extending from the ground portion, positioned between the connecting member and the antenna. The isolation portion acts as a barrier that blocks electromagnetic noise and parasitic components generated by the connecting member from reaching the antenna, thereby protecting antenna performance while allowing the connecting member to maintain its functionality in connecting electronic components.
2Ease of operation
If connecting members are used to operatively connect electronic components, then device operability is improved, but unwanted parasitic components are generated that affect antenna radiation performance
Solution Approach 1:
The ground isolation structure converts the harmful electromagnetic noise and parasitic components generated by the connecting member into a controlled ground reference. By providing a dedicated ground portion and isolation portion, the structure channels the electromagnetic interference into a controlled path that terminates at ground, preventing it from radiating as unwanted parasitic components while maintaining the connecting member's operational functionality.
3Ease of operation
If electronic components are exposed through the housing to form the exterior, then device accessibility is improved, but electromagnetic noise from these components affects antenna radiation performance
Solution Approach 1:
The ground isolation structure serves as an intermediary barrier between the electronic components (which may be exposed through the housing for accessibility) and the antenna. The isolation portion physically and electrically separates the electromagnetic noise generated by accessible electronic components from the antenna, allowing the components to remain exposed and accessible while preventing their electromagnetic interference from degrading antenna radiation 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
The electrical loop structure provided by the printed circuit board reduces antenna performance degradation by minimizing noise and parasitic components, allowing for improved antenna efficiency and the ability to shift resonant frequencies.
Implementation Method 1
the connecting member includes: an extension portion extending along the side wall; a first portion extending from a first end of the extension portion and connected to the printed circuit board; a second portion extending from a second end of the extension portion and connected to a conductive region of the printed circuit board; and a conductive trace extending from the first portion to the second portion through the extension portion, the conductive trace is connected to the ground portion through the conductive region of the printed circuit board
Data Source
AI summary
A wearable electronic device includes a frame forming a side wall of the wearable electronic device; a printed circuit board within the frame and including a ground portion; and a connecting member, wherein at least a portion of the connecting member extends along the side wall, wherein the connecting member includes: an extension portion extending along the side wall; a first portion extending from a first end of the extension portion and connected to the printed circuit board; a second portion extending from a second end of the extension portion and connected to a conductive region of the printed circuit board; and a conductive trace extending from the first portion to the second portion through the extension portion, the conductive trace is connected to the ground portion through the conductive region of the printed circuit board, and the printed circuit board includes a conductive pattern extending from the conductive region.