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'Impossible' Millimeter Wave Sensor Has Wide Potential


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The sensor is the size of a sesame seed, is cheap to produce, and features a long battery life.

This prototype millimeter-wave radar sensor is capable of measuring extremely small vibrations and movements, while being energy-efficient and cheap to produce.

Credit: Omeed Momeni/UC Davis

A proof-of-concept sensor developed by University of California, Davis (UC Davis) researchers for millimeter wave radars can detect vibrations 1,000 times smaller and target-position changes 100 times smaller than a strand of human hair, using a novel design.

The device is part of a Foundation for Food & Agriculture Research-funded project to create a low-cost sensor that can monitor the water status of individual plants.

Former UC Davis researcher Hao Wang proposed addressing noise by controlling the volume of noise the sensor received, preserving the measurement's sensitivity and the data's integrity.

The design of the easily produced chip also significantly enhances the sensor's energy efficiency.

From UC Davis News Center
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