Conductive Cover Resonant Circuits for Wireless Antenna Interference
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Solution Overview
Problem
Metallic covers in portable electronic communication devices often cause electromagnetic interference with the antenna arrangement, leading to inefficient wireless communication.
Innovation Solution
A conductive cover portion is coupled to a ground member via reactive components to form resonant circuits that resonate in specific frequency bands, reducing electromagnetic coupling and enhancing antenna efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metallic cover is used for aesthetic appeal and durability, then the cover's appearance and protective function are improved, but electromagnetic interference with the antenna arrangement increases, causing reduced antenna efficiency
Solution Approach 1:
A ground member is introduced as an intermediary component between the metallic cover and the antenna arrangement. This ground member is electrically connected to the antenna arrangement and positioned between the antenna and the metallic cover, serving as a mediator that manages electromagnetic interactions. The ground member provides a controlled path for electromagnetic currents, preventing direct interference between the metallic cover and the antenna while maintaining the aesthetic and protective benefits of the metallic cover.
2Reliability
If a metallic cover is used to protect electronic components, then the protective function is improved, but electromagnetic coupling between the cover and antenna arrangement increases, leading to inefficient wireless communication
Solution Approach 1:
The metallic cover's inherent electromagnetic properties, which initially cause harmful coupling, are converted into a beneficial effect. The ground member is strategically positioned and connected to transform the electromagnetic currents that would otherwise interfere with the antenna into a controlled pattern that actually enhances antenna performance. The metallic cover becomes part of the antenna system's electromagnetic structure, with its reflective and conductive properties being harnessed to improve rather than degrade wireless communication efficiency.
3Reliability
If apertures are created in the metallic cover for radio wave passage, then antenna efficiency is improved, but the cover's aesthetic appeal and structural integrity are compromised
Solution Approach 1:
The requirement for physical apertures in the metallic cover is extracted and eliminated through the introduction of the ground member. Instead of creating openings in the cover structure, the ground member provides an alternative electromagnetic pathway that allows radio waves to pass through the metallic cover effectively. This extraction of the aperture requirement maintains the cover's continuous, aesthetically pleasing surface while achieving the necessary electromagnetic transparency for efficient antenna operation.
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 configuration allows for efficient wireless communication by minimizing electromagnetic interference, enabling the use of fully metallized covers without the need for specific apertures for radio wave passage, thus improving design flexibility and performance.
Implementation Method 1
the conductive cover portion being coupled to the ground member via a first reactive component to form a first resonant circuit configured to resonate at least partially in the first operational resonant frequency band, and via at least a second reactive component to form at least a second resonant circuit configured to resonate at least partially in at least the first operational resonant frequency band
Data Source
AI summary
An apparatus comprising: a ground member configured to receive one or more antennas, the one or more antennas being configured to operate in at least a first operational resonant frequency band; and a cover defining an exterior surface of the apparatus and including a conductive cover portion, the conductive cover portion being coupled to the ground member via a first reactive component to form a first resonant circuit configured to resonate at least partially in the first operational resonant frequency band, and via at least a second reactive component to form at least a second resonant circuit configured to resonate at least partially in at least the first operational resonant frequency band.