Wireless Power And Signal Reception Filtering For Rotating Links
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Solution Overview
Problem
Interference between power transmission and signal transmission antennas in rotating movable devices degrades signal quality due to near-field electromagnetic field coupling, leading to poor communication performance.
Innovation Solution
A communication apparatus with a power transmission coil, a power transmission circuit, a receiving antenna, a receiving circuit, and a filter circuit that suppresses power transmission frequency signals to reduce interference and improve signal quality during concurrent wireless power and communication operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an antenna for signal transmission and an antenna for power transmission are closely arranged to perform non-contact signal transmission and power transmission, then wireless power transmission and communication can be simultaneously enabled in rotating movable portions, but interference occurs from the power transmission antenna to the signal transmission antenna, degrading signal quality
Solution Approach 1:
The patent divides the antenna system into functionally separate components: a power transmission coil for wireless power transmission and a signal transmission antenna for communication. This segmentation allows each component to be optimized for its specific function while reducing mutual interference, as the power coil and signal antenna operate at different frequencies and can be spatially separated within the rotating movable portion
Solution Approach 2:
The patent introduces a magnetic shield as an intermediary element positioned between the power transmission coil and the signal transmission antenna. This magnetic shield acts as a mediator that blocks or attenuates the electromagnetic field from the power coil, preventing it from interfering with the signal antenna while allowing both components to maintain their required functions
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 filter circuit effectively attenuates interference, enhancing communication quality by reducing noise around the power transmission frequency, thereby enabling reliable wireless communication and power transmission in proximity without degrading signal quality.
Implementation Method 1
wireless power transmission to another communication apparatus at a predetermined power transmission frequency via the power transmission coil, the other communication apparatus including a power reception coil coupled to the power transmission coil with at least either of an electric field or a magnetic field
Implementation Method 2
a filter circuit that suppresses a signal of the power transmission frequency, which is to be input from the receiving antenna to the receiving circuit due to the wireless power transmission by the power transmission circuit
Data Source
AI summary
A communication apparatus includes a power transmission coil and a power transmission circuit that performs wireless power transmission to another communication apparatus at a predetermined power transmission frequency via the power transmission coil. The other communication apparatus includes a power reception coil coupled to the power transmission coil with at least either of an electric field or a magnetic field. In addition, the communication apparatus includes a receiving antenna and a receiving circuit that receives via the receiving antenna a signal transmitted from the other communication apparatus via a transmitting antenna of the other communication apparatus. Furthermore, the communication apparatus includes a filter circuit that suppresses a signal of the power transmission frequency, which is to be input from the receiving antenna to the receiving circuit due to the wireless power transmission by the power transmission circuit.