Multi-Coil Antenna Switching for Wireless Standard Interference
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Solution Overview
Problem
Existing multi-coil antennas in portable electronic devices face challenges in providing high performance due to interference from surrounding coils, particularly when multiple wireless communication technologies with different frequency characteristics and inductances are used, making it difficult to optimize performance and manage space constraints.
Innovation Solution
The electronic device incorporates a multi-coil antenna system with a processor-controlled switch mechanism that connects coils in parallel or series based on operation modes, allowing for optimized performance across various wireless communication technologies by managing coil connections and magnetic field interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple coils are used to support different wireless communication technologies, then the versatility and functionality of the device are improved, but the interference between coils and difficulty in optimizing performance increases
Solution Approach 1:
The antenna module is segmented into multiple independent coils (first coil, second coil, third coil) that can be independently controlled through switching mechanisms. This segmentation allows each coil to be optimized for specific wireless communication technologies while preventing interference between coils by activating only the necessary coil for each operation mode.
Solution Approach 2:
The patent implements dynamic coil configuration through processor-controlled switches that can connect coils in parallel or individually based on the operation mode. This dynamic reconfiguration allows the system to adapt the antenna module's characteristics to match different wireless communication requirements, optimizing performance for each specific technology while minimizing inter-coil interference.
2Area of stationary object
If the area and thickness for mounting the antenna are reduced to meet portable device constraints, then the compactness and portability are improved, but the coil performance and wireless transmission efficiency deteriorate
Solution Approach 1:
The patent combines multiple coils into a single antenna module that can function as multiple independent antennas. By merging the first coil, second coil, and third coil into one integrated module with selective connectivity, the design achieves compact mounting area while maintaining the wireless transmission efficiency of individual coils through selective activation and parallel connection capabilities.
Solution Approach 2:
The antenna module is designed as a universal component that can support multiple wireless communication technologies (WPC, A4WP, MST, NFC) through a single multi-coil structure. The processor-controlled switching mechanism enables this single module to perform multiple functions by activating appropriate coils or coil combinations for each specific technology, thereby maintaining transmission efficiency without requiring separate antennas for each technology.
3Adaptability or versatility
If coils with different inductances are used to optimize different wireless communication technologies, then the adaptability to various standards is improved, but the interference between coils with close resonant frequencies increases
Solution Approach 1:
The patent introduces processor-controlled switches as intermediary components between the coils and the magnetic field controller. These switches act as mediators that prevent direct interaction and interference between coils with different inductances and resonant frequencies by selectively connecting only the necessary coil for each operation mode, thereby eliminating harmful interference while maintaining adaptability to various wireless standards.
Solution Approach 2:
Different coils within the antenna module are designed with locally optimized characteristics (different inductances and resonant frequencies) suited for specific wireless communication technologies. The switching mechanism ensures that each coil operates in its optimized frequency range without interfering with other coils, as only the relevant coil is activated for each specific communication standard.
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 solution enhances the efficiency and performance of wireless power transmission and data communication by minimizing interference and optimizing coil performance across different wireless standards, while also improving spatial efficiency within the device.
Implementation Method 1
power may be transmitted using various international standards, e.g., wireless power consortium (WPC) or alliance for wireless power (A4WP)
Implementation Method 2
data may be transmitted using magnetic secure transmission (MST) or near field communication (NFC)
Data Source
AI summary
According to one embodiment, an electronic device comprises a battery, an antenna module including a first coil and a second coil, at least one switch electrically connected with the antenna module, a magnetic field controller electrically connected with the antenna module, a charger electrically connected with the battery and the magnetic field controller, and at least one processor electrically connected with the at least one switch, the magnetic field controller, and the charger. The at least one processor may be configured to, based on an operation mode associated with the antenna module, control the at least one switch to connect the first coil with the magnetic field controller, or to connect the first coil and the second coil in parallel and allow the first coil and the second coil connected in parallel to connect with the magnetic field controller. Other embodiments may be possible as well.