Antenna Shield Opening Layout for Noise Isolation and Gain Control
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Solution Overview
Problem
Existing solutions to prevent antenna interference from noise using metal casings result in increased antenna gain and poor omnidirectional radiation performance, necessitating additional antennas and potentially violating regulatory standards.
Innovation Solution
An antenna assembly with a covering shield that has a second opening near the radiation portion, allowing the noise source to be located on a different side, reducing antenna gain while maintaining effective noise shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a metal casing is used to completely seal the surroundings of the antenna, then noise interference from other electronic components is blocked, but the antenna gain is overly increased and omnidirectional radiation performance deteriorates
Solution Approach 1:
The covering shield is divided into multiple sections with openings at different locations. The first opening faces the antenna and the second opening faces away from the noise source, segmenting the shield structure to allow controlled electromagnetic wave passage while maintaining noise isolation in specific directions.
Solution Approach 2:
Different regions of the covering shield have different properties - the first opening region allows electromagnetic waves to pass through to maintain antenna radiation performance, while the solid portions of the shield provide noise blocking in other directions, creating local quality variations to satisfy conflicting requirements.
2Object-affected harmful factors
If a metal casing is used to completely seal the surroundings of the antenna, then noise interference is blocked, but the antenna gain is overly increased which may violate regulatory standards
Solution Approach 1:
Openings are extracted from the covering shield structure at strategic locations - the first opening near the antenna and the second opening on the opposite side from the noise source. This extraction allows electromagnetic waves to escape in controlled directions, reducing excessive gain while maintaining noise shielding in critical areas.
Solution Approach 2:
The solution addresses the gain control problem by introducing spatial dimensionality through strategically positioned openings in different directions. The first opening controls radiation in one dimension while the second opening controls radiation in another dimension, achieving gain management through three-dimensional spatial arrangement.
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 solution achieves reduced antenna gain with omnidirectional radiation patterns and effective noise shielding, meeting regulatory requirements.
Implementation Method 1
The covering shield is fixed to the casing and at least partially located between the antenna and the noise source. The covering shield surrounds and forms a covering space... such that the gain of the antenna can be reduced while the covering shield can still provide a desired effect of shielding noise generated by the noise source.
Data Source
AI summary
An electronic device includes a casing, a motherboard, a noise source and an antenna assembly. The motherboard is located in the casing. The noise source is disposed on the motherboard. The antenna assembly includes an antenna and a covering shield. The antenna is electrically connected to the motherboard and located close to the casing and has a radiation portion. The covering shield is fixed to the casing and located between the antenna and the noise source. The covering shield forms a covering space, a first opening and a second opening, the first opening and the second opening are located at different sides of the covering space, the first opening is covered by the casing and located close to the antenna, the second opening is located close to the radiation portion, and the second opening and the noise source are respectively located at different sides of the covering shield.