Ultra-compact radar sensors for advanced applications

October 18, 2019 //By Rich Pell
Ultra-compact radar sensors for advanced applications
Fabless ASIC supplier Socionext America (Sunnyvale, CA) has introduced ultra-compact, low-power 60-GHz wide-band radar sensors designed to detect an individual's location and movement with very high accuracy and precision.

Compliant with the new 60-GHz wireless equipment band available in North America and Europe, the SC1220 series radar sensors offer high-precision sensing using a 7-GHz (57 ~ 64 GHz) bandwidth, which allows the devices to detect a person's location and very minute movements. These capabilities, says the company, and the fact that the sensors are generally not susceptible to environmental conditions such as temperature and light fluctuations, make the series ideal for advanced applications such as operating appliances using hand gestures.

The highly integrated SC1220 radar sensors incorporate an antenna, wireless circuit, A/D converter, FIFO memory, SPI interface, and an intelligent power control sequencer for flexible duty cycle control, and do not require advanced knowledge by users in handling high-frequency devices.

Two versions are now available: the 7 x 7 x 0.83-mm SC1220AT2 detects three-dimensional movements such as the lifting and lowering of a person's hands, while the 9 x 9 x 0.98-mm SC1221AR3 specializes in high-precision detection of two-dimensional movements, and is capable of detecting multiple moving objects in a specific area. The sensors operate with 1 mW (SC1221AR3) and 2.5 mW (SC1220AT2) of power consumption.

The SC1220AT2 features a built-in antenna of two transmission systems and a 2 x 2 reception array, and can detect azimuth, elevation angle, speed, and distance. In addition to presence detection, the device can sense the position of a person's hands in a three-dimensional space, which is ideal for operations requiring gestures.

The SC1221AR3 incorporates a 1 x 4 linear array receiver antenna to detect azimuth, speed, and distance of multiple moving objects. Although the angle detection is only available in the azimuth direction, it is two times more precise than SC1220AT2, which is suitable for detecting a person entering a specific area.

Samples are available now, with pricing of $20.00 ea/100 units. Volume production scheduled in the second quarter of 2020.

Socionext America


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