System and method for vehicle traffic signaling
Number of patents in Portfolio can not be more than 2000
United States of America
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Feb 18, 2025
Grant Date -
May 23, 2024
app pub date -
Jan 24, 2024
filing date -
Jan 24, 2024
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Abstract
A radar traffic sign apparatus is provided comprising an electronic or a motorized radar traffic sign. The electronic sign has at least one metasurface to shape complex configurations such as plane and/or corner reflectors. Each metasurface has a top layer of PCB board for controllable elements, a ground layer, and biasing means comprising diodes or switches. The state of the sign can be changed by the elements attached to the top layer. A bias voltage applied at the biasing means causes states of at least one element to change, and an operation mode of the metasurface to switch. The motorized sign may include multiple planes to shape a specific corner reflector with proper RCS. The direction or opening of a motorized sign can be controlled. The radar traffic sign has an ON mode to reflect the radar signal, and an OFF mode where the radar signal is not reflected.
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