Cross-Polarized Antenna Module for Precise EV Charging Alignment
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Solution Overview
Problem
Existing wireless charging technologies for electric vehicles require precise alignment and accurate positioning over a ground-plane charging pad, necessitating a reliable wireless communication system that can determine the distance and direction of the electric vehicle with respect to the charging pad.
Innovation Solution
The development of an antenna assembly and module that operates at two dominant perpendicular polarizations with low output correlation and cross-polarization, and high gain, to transmit and receive ultra-wide band signals for precise positioning and alignment of electric vehicles during wireless charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wireless charging system uses a ground-plane charging pad for electric vehicles, then wireless charging can be provided, but precise alignment and accurate positioning of the electric vehicle over the charging pad becomes difficult to achieve
Solution Approach 1:
The patent implements a feedback mechanism where the antenna module continuously determines the position and orientation of the electric vehicle relative to the ground-plane charging pad using ultra-wide band signals, and provides this information back to the wireless charging system to enable real-time alignment adjustments, thereby achieving accurate positioning without requiring manual precision alignment
Solution Approach 2:
The patent replaces mechanical alignment systems with an electromagnetic-based positioning system using antenna assemblies that transmit and receive ultra-wide band signals to determine vehicle position and orientation, eliminating the need for physical alignment mechanisms or markers
2Measurement precision
If an antenna module is designed to operate at two dominant perpendicular polarizations with low output correlation, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple antenna elements with different polarizations into a single integrated antenna module assembly, where multiple antenna elements are positioned at specific locations and orientations within one module, allowing the system to achieve two dominant perpendicular polarizations with low output correlation while maintaining a compact and manageable device structure
Solution Approach 2:
The antenna module is designed to perform multiple functions simultaneously: it transmits and receives ultra-wide band signals for positioning, determines both position and orientation of the vehicle, and operates with two dominant perpendicular polarizations, thereby achieving high measurement precision through a multi-functional rather than specialized design
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 proposed antenna assembly and module achieve efficient and accurate determination of the electric vehicle's position and orientation relative to the ground-plane charging pad, ensuring reliable and precise wireless charging operations.
Implementation Method 1
transmitting and/or receiving ultra-wide band (UWB) signals used to determine a distance and direction of EV from the GPCP
Implementation Method 2
the antenna substrate comprises of a dielectric material
Data Source
AI summary
A wireless communication system comprising one or more cross polarized antenna assemblies with optimized propagation delay that form part of an antenna module having two dominant perpendicular polarizations. Isolation or crosstalk in each antenna module is minimized through an implementation of a sectorized planar isolation and correlation enhancer in the form of a ground plane opening structure.