Chinese startup develops 77 GHz CMOS radar transceiver

December 17, 2019 //By Peter Clarke
77 GHz CMOS radar transceiver from China
Shanghai startup Calterah Semiconductor Technology has rolled out its second generation of 77 GHz CMOS radar system chip for autonomous driving applications.

The Alps chip is manufactured in 40nm CMOS and comes in variants with either two transmit and four receive channels (2T4R) or four transmit and four receive channels (4T4R).

It includes a configurable waveform generator, and an analog-to-digital converter with sampling rates of up to 50 million of samples per second (MSPS). The broadband processor based on the ARC EM6 licensed from Synopsys implements radar algorithms.

In addition to the conventional embedded wafer-level ball grid array (eWLB) package, the Alps chip series also includes an Antenna in Package (AiP), which greatly reduces the difficulty and cost of radar development by integrating the antenna onto the chip packaging layer. Alps covers long-range, medium-range, short-range, and ultra-short-range radar requirements.

Basic specifications of Alps 77 GHz CMOS radar SoC. Source: Calterah Semiconductor Technology.

Calterah has also developed indoor detection and tracking of the human body applications based on 60 GHz and 77 GHz mm-Wave radar chip families, employing FMCW and MIMO technologies.

Calterah Semiconductor Technology (Shanghai) Co. Ltd., was founded in 2014 and has rolled at a series of 77 GHz and 60 GHz CMOS radar transceivers and sensors including antenna in package. The Yosemite (77/79 GHz) and Yellowstone (60 GHz) were produced in 2017 followed by the Alps 77/79 GHz CMOS radar SoC in 2019. The Rhino 60 GHz CMOS radar SoC is due to follow.

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