Vehicle Window Antenna Coating for Radar Sensing and Dimming
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Solution Overview
Problem
Existing vehicle sensing technologies lack efficient integration of radar detection and electro-optic dimming capabilities in a transparent window, limiting the ability to simultaneously provide occupant detection and environmental control.
Innovation Solution
A sensing apparatus incorporating a conductive coating with an antenna array on a vehicle window, capable of transmitting radio frequency signals at a controlled phase angle, integrated with an electro-optic element for dimming control, allowing simultaneous radar sensing and environmental adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate sensing and dimming components are installed in the vehicle, then sensing functionality and dimming functionality are provided, but device complexity and material usage increase
Solution Approach 1:
The patent combines sensing and dimming functions into a single integrated window assembly. The antenna array for sensing and the electro-optic medium for dimming are incorporated into the same window structure, eliminating the need for separate components and reducing overall device complexity while maintaining both functionalities.
Solution Approach 2:
The window assembly is designed to perform multiple functions simultaneously: it serves as both a sensing apparatus with antenna array for radar detection and a dimming device with electro-optic medium. This multi-functional design reduces the number of separate components needed in the vehicle.
2Adaptability or versatility
If separate sensing and dimming components are installed in the vehicle, then sensing functionality and dimming functionality are provided, but material usage increases
Solution Approach 1:
The patent merges sensing and dimming components into a single integrated window structure. By combining the antenna array and electro-optic medium in one assembly, the total material usage is reduced compared to installing separate sensing devices and dimming films throughout the vehicle.
3Measurement precision
If antenna array is integrated into the window, then transparent RADAR detection is enabled, but manufacturing complexity increases
Solution Approach 1:
The antenna array is divided into multiple individual antenna elements that can be manufactured separately and then assembled into the window structure. This segmentation allows for easier manufacturing and quality control compared to creating a single large integrated antenna, while still achieving high angular accuracy through the array configuration.
4Adaptability or versatility
If electro-optic medium is added to the window, then dimming function is provided, but device complexity increases
Solution Approach 1:
The electro-optic medium is integrated directly into the window assembly alongside the antenna array, combining dimming functionality with the sensing structure. This integration reduces the need for separate dimming films or components that would otherwise be installed independently.
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
Enables precise occupant detection and vital sign monitoring while maintaining transparency, with enhanced angular accuracy and reduced material usage for both radar detection and electro-optic dimming functions.
Implementation Method 1
an electro-optic medium disposed between the first electrode and the second surface
Implementation Method 2
an antenna array that is configured to communicate a radio frequency at a phase angle
Data Source
AI summary
A sensing apparatus for a vehicle includes a window, a wireless sensing circuit, and a controller. The wireless sensing circuit includes a conductive coating coupled to the window. The conductive coating includes an antenna array that is configured to communicate a radio frequency at a phase angle. Further, a controller is in communication with the antenna array and configured to communicate a first signal to the antenna array to control the phase angle.