Antenna Noise Reduction Structure for USB 3.0 Dock Interference
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Solution Overview
Problem
Communication quality is affected when an electronic device with an antenna is connected to a transmission dock, as noise sources within the dock, such as USB 3.0 modules, radiate electromagnetic waves that interfere with the antenna's transmission and reception bandwidth.
Innovation Solution
A noise reduction structure comprising an antenna, a noise source, an electromagnetic conductor, and a grounding member, where the grounding member is electrically isolated from the electromagnetic conductor and forms a good grounding path to the noise source, minimizing the electromagnetic wave interference by shielding it and directing it back to the circuit board rather than allowing it to reach the antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a USB 3.0 module is used as a noise source in the transmission dock, then high-speed data transmission capability is improved, but electromagnetic wave interference with the antenna is worsened
Solution Approach 1:
A grounding member is introduced as an intermediary between the noise source (USB 3.0 module) and the antenna. The grounding member forms a minimized grounding path with the noise source, acting as a mediator to redirect electromagnetic waves away from the antenna while preserving the USB 3.0 module's high-speed transmission capability
Solution Approach 2:
The electromagnetic waves radiated by the USB 3.0 module, which originally cause interference, are converted into a beneficial effect by redirecting them through the grounding member back to the circuit board. The noise energy is thus converted from a harmful interference source into a controlled signal path that does not affect antenna communication
2Object-affected harmful factors
If the grounding member is electrically isolated from the electromagnetic conductor, then antenna communication quality is improved, but grounding effectiveness is worsened
Solution Approach 1:
The grounding member is designed with localized grounding properties specifically at the noise source location, while maintaining electrical isolation from other electromagnetic conductors in the system. This local quality approach allows effective noise grounding without compromising overall system grounding effectiveness or causing interference to other components
Solution Approach 2:
The grounding system is segmented into separate zones: the grounding member is electrically isolated from the electromagnetic conductor but maintains its own minimized grounding path to the circuit board. This segmentation allows independent optimization of noise grounding and signal transmission paths
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 noise reduction structure effectively prevents electromagnetic wave interference with the antenna, maintaining communication quality by creating a minimized grounding path that shields noise sources, ensuring the electromagnetic waves do not reach the antenna, thus reducing communication interference.
Implementation Method 1
the grounding member is electrically isolated from the electromagnetic conductor and forms a good grounding path to the noise source
Data Source
AI summary
A noise reduction structure includes an antenna, a noise source, an electromagnetic conductor, and a grounding member. The antenna has a transmission and reception bandwidth. The noise source radiates an electromagnetic wave. Frequency of the electromagnetic wave falls within the transmission and reception bandwidth. The electromagnetic conductor is closer to the antenna than the noise source. The grounding member is disposed at the noise source in such a manner to face the antenna. The grounding member is electrically isolated from the electromagnetic conductor and forms a good grounding path to the noise source. Furthermore, a transmission dock with the noise reduction structure is provided.