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Ultra-compact, ultra-low-power 60GHz radar sensor targets in-cabin applications

Ultra-compact, ultra-low-power 60GHz radar sensor targets in-cabin applications

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By Christoph Hammerschmidt



The SC1260 series RF ranging sensors from Socionext Inc utilizes time-division multiplexing (TDM-MIMO) operation with multiple Tx/Rx antennas that can detect the position and movement of passengers in a vehicle with maximum accuracy.

The device has an all-in-one configuration that incorporates antennas and radar signal operation circuits, to achieve maximum detection accuracy in an ultra-low-power, ultra-compact package. The sensors use a wide band of 6.8GHz (57.1 to 63.9GHz) with an expanded number of receiving antennas by TDM-MIMO operation and built-in radar signal operation circuits for range-finding and angle calculation. The sensor enables acquisition of three-dimensional (3D) position information without requiring advanced expertise in high-frequency devices and signal operation. It combines antennas, RF circuits, AD converters, FIFO memory, SPI interface, and intelligent power control sequencer for flexible duty cycle control. Power required is only 0.72mW at 0.1% duty cycle operation.

These capabilities make the series optimal for applications such as tracking the position and movements of passengers in a vehicle while suppressing the load on the vehicle battery when the engine is off. Moreover, TDM-MIMO operation enables high-precision sensing, such as the detection of passengers when three people are sitting in a row inside the vehicle.

The SC1260 Series complies with the global broadband 60GHz radio equipment standard. Sample and evaluation kit shipments are scheduled for June, with production volumes to be available in Q1 2024.

https://www.eu.socionext.com

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