Multi-Antenna Wireless Power Beamforming With Communication Nulling
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Solution Overview
Problem
Simultaneous wireless transmission of power and information is hindered by the need for wide-band power supply, which can interfere with adjacent systems, and requires special configurations for power reception devices, increasing power consumption and cost.
Innovation Solution
An electronic device with multiple antennas uses spatial multiplexing to control transmission weights, directing power transmission beams towards one antenna and nulls towards another for information communication, allowing simultaneous transmission of power and information signals without a wide-band power supply or special configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wide-band power supply is used for wireless power transmission, then power transmission capability is improved, but interference with adjacent systems increases
Solution Approach 1:
The patent segments the frequency spectrum into multiple subcarriers (frequency division multiplexing), allowing power transmission on specific subcarriers while leaving others available for communication or unused. This segmentation enables selective power transmission without occupying the entire wide band, thereby reducing interference with adjacent systems while maintaining adequate power transmission capability.
2Object-generated harmful factors
If OFDM with null subcarrier is used for information transmission, then interference avoidance is improved, but device complexity increases due to special configuration requirements
Solution Approach 1:
The patent merges power transmission and information communication into a single integrated system using the same antenna and signal processing chain. By controlling the phase and amplitude of signals across multiple subcarriers, the system simultaneously transmits both power and information without requiring separate hardware paths, thereby reducing device complexity while avoiding interference through spectral separation.
Solution Approach 2:
The patent makes the transmission system universal by enabling it to perform multiple functions (power transmission and information communication) simultaneously through the same physical infrastructure. The base station and user equipment can handle both power and data signals through a unified receiver and transmitter design, eliminating the need for specialized separate configurations.
3Object-generated harmful factors
If power transmission signal is inserted into null subcarrier of OFDM, then interference with communication is reduced, but power consumption increases due to special configuration
Solution Approach 1:
The patent employs dynamic signal processing where the phase and amplitude of each subcarrier are continuously adjusted based on channel conditions and power requirements. This dynamic control allows the system to optimize power transmission efficiency while minimizing the energy required for signal processing, avoiding the fixed overhead costs associated with static special configurations.
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 approach enables efficient and cost-effective simultaneous wireless transmission of power and information, minimizing interference and power consumption while using standard communication circuits.
Implementation Method 1
a transmission signal obtained by superimposing the power transmission signal and an information communication signal
Implementation Method 2
a beam is directed toward a first antenna of the power reception device for power transmission and a null is directed toward a second antenna of the information signal transceiver
Implementation Method 3
an information signal transceiver connected by spatial multiplexing
Data Source
AI summary
A power transmission device according to one aspect includes a plurality of antennas, a controller that controls, for power transmission signals transmitted from the plurality of antennas to a power reception device for power transmission and an information signal transceiver connected by spatial multiplexing, a transmission weight such that a beam is directed toward a first antenna of the power reception device for power transmission and a null is directed toward a second antenna of the information signal transceiver, and a transmitter that can transmit, using the transmission weight, a transmission signal obtained by superimposing the power transmission signal and an information communication signal.