Wireless Charging Circuit Frequency Management for Communication Interference
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Solution Overview
Problem
Wireless communication signal sensitivity deteriorates when a wireless power reception device receives power from a wireless power transmission device using the same frequency band as its communication signal, or an adjacent band, leading to interference.
Innovation Solution
An electronic device with a wireless communication circuit and a wireless charging circuit that identifies a second frequency for wireless power transmission based on the first frequency used for communication, allowing simultaneous wireless communication and power transfer without interference by switching to a different frequency band or channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wireless power transmission is performed using the same frequency band as wireless communication, then power transfer efficiency is improved, but communication signal sensitivity deteriorates due to interference
Solution Approach 1:
The patent divides the electromagnetic spectrum into separate frequency bands: one band for wireless communication and another band for wireless power transmission. By segmenting the frequency resources, the system can simultaneously perform communication and power transfer without mutual interference, thus maintaining both communication sensitivity and power transfer efficiency.
Solution Approach 2:
The patent transitions from using a single frequency dimension for both communication and power transmission to using multiple frequency dimensions. By operating in different frequency bands (e.g., sub-6GHz for communication and mmWave for power transmission), the system adds a frequency dimension separation that eliminates interference while enabling simultaneous operations.
2Device complexity
If a single frequency band is used for both wireless communication and wireless power transmission, then device complexity is reduced, but signal interference occurs leading to communication reliability deterioration
Solution Approach 1:
The patent segments the device into separate functional modules: a communication module operating in one frequency band and a power transmission module operating in another frequency band. This segmentation allows each module to be optimized independently while avoiding interference, thus maintaining communication reliability without significantly increasing overall device complexity.
Solution Approach 2:
The patent introduces a frequency management intermediary that coordinates between the communication and power transmission modules. This intermediary selectively activates appropriate frequency bands based on operational requirements, managing the complexity of multi-band operations while ensuring communication reliability is maintained.
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
Prevents deterioration of wireless communication signal sensitivity by transmitting wireless power on a frequency distinct from the communication signal, ensuring reliable communication and power transfer.
Implementation Method 1
a wireless communication circuit including a first antenna and configured to perform wireless communication with an external electronic device through the first antenna
Implementation Method 2
a wireless charging circuit including a second antenna and configured to transmit wireless power to the external electronic device through the second antenna
Data Source
AI summary
An electronic device and method of operating an electronic device are provided. The method includes receiving a wireless charging request from an external electronic device while wireless communication with the external electronic device is performed through a communication circuit of the electronic device, identifying a second frequency, based on a first frequency being used by the wireless communication circuit for the wireless communication, in response to the wireless charging request, and transmitting wireless power to the external electronic device, based on the identified second frequency through a wireless charging circuit of the electronic device while wireless communication with the external electronic device is performed.