Millimeter wave radar refers to a radar (wavelength of 1 to 10 mm) with a working frequency band in the millimeter wave band (30-300 GHz). It is a sub-band of microwave (300 MHz-300 GHz). The principle of ranging is the same as that of general radar, that is, the radio wave (radar wave) is sent out, then the echo is received, and the time difference of the reflected wave of the obstacle is used to determine the obstacle distance. The relative velocity is determined by the frequency offset of the reflected wave.
In today's fast-growing automotive sector, the convergence of multiple sensors is an inevitable trend in the future of automotive electronics. Among them, the millimeter wave radar has a long transmission distance, low atmospheric attenuation and loss in the transmission window, and strong penetrability, which can meet the requirements of the vehicle for adaptability to the weather throughout the day, and the millimeter wave itself determines the millimeter. The wave radar sensor device is small in size, light in weight and moderate in cost. Therefore, it is a good complement to other sensors such as infrared, laser, ultrasonic, camera, etc., the short board in the automotive application, the first to become the main sensor of the ADAS system and automatic driving. Domestic and international mainstream automotive millimeter wave radar frequency bands are 24GHz (for short-range radar, 15-30m) and 77GHz (for long-distance radar, 100-200m), of which 77GHz millimeter wave radar (hereinafter referred to as "77G radar") It is the mainstream solution for vehicle forward remote detection, and the 24GHz millimeter wave radar (hereinafter referred to as "24G radar") is mainly used for the backward and lateral proximity detection of the vehicle.
Mr. Tong Haoliang, vice president of Shanghai Mogina Intelligent Information Technology Co., Ltd. (hereinafter referred to as “Shanghai Moginaâ€), said at the 10th TelemaTIcs@China Automotive Internet Conference held recently, although the detection of 77G radar is compared with 24G radar. Long distance, small size, easier to install, low power consumption, better than 24G radar for pedestrian and bicycle and object monitoring, which means it can provide safer and better performance in more application scenarios. . However, since the domestic 77G radar solutions are multi-chip solutions, multi-chip solutions are difficult to design and develop, and the cost is high. It is difficult to develop samples and obtain relevant test equipment and pass tests. The process is slow. Moreover, many domestic development teams rely on research institutes and universities. Although research institutes and universities have advantages in research, they are relatively weak in product making.
At present, the key technology of millimeter-wave radar is still dominated by giants such as the traditional representative of the traditional auto parts company "ABCD" (ABCD refers to Autoliv, Bosch, ConTInetal, Delphi ( Dephi)), especially the 77G radar technology is only owned by a few companies such as Bosch, ConTInental and Dephi, and the localization is almost blank. As a key component of the millimeter wave radar, the front-end monolithic microwave integrated circuit (MMIC) is also in the hands of a few foreign chip manufacturers such as Infineon, ST, NXP/Freescale, and TI.
In this case, in 2015, created in Silicon Valley, USA, Shanghai Mogina, which settled in Shanghai in 2017, brought together senior scientists from Silicon Valley in the US and product and technology experts from leading automotive electronics and artificial intelligence companies to adopt TI in May this year. The release of the single-chip CMOS (complementroy meta-odix sensor, a large-scale integrated circuit manufacturing process and technology) millimeter-wave radar solution, broke through the core technical difficulties in just a few months. Mogina will soon launch a domestically produced 77GHz millimeter wave radar product, and hopes to become the first company in China capable of mass production of 77G radar.
Talking about the single-chip CMOS millimeter wave radar solution introduced by Texas Instruments Semiconductor Technology (Shanghai) Co., Ltd. (hereinafter referred to as "TI") in the first half of this year, the industry unanimously believes that this technology may cause technological subversion of the future industry. Mr. Jiang Hong, Director of Embedded Systems and Applications at TI China, said that by the end of 2016, TI's total shipments of automotive processor chips reached 150 million, and TI's automotive processor division was the fastest growing division of TI. This shows that the rapid development of automotive electronics technology. In this context, the next generation of artificial intelligence is an indispensable factor, a large number of data exchange, both fast and real-time, to ensure security, and some technologies to do redundancy, encryption and firewall isolation. Therefore, TI is very rigorous and valued for the development strategy of the next generation of chips.
According to Zos Consulting's 2015-2020 Global and China Automotive Radar Industry Market Report, the global millimeter-wave automotive radar market in 2015 was approximately US$1.936 billion, and the market size in 2016 is expected to reach US$2.460 billion. With a total investment of 5.12 billion US dollars, it is the most powerful product in the field of automotive electronics.
With the continuous improvement of autonomous driving, the number of radar sensors in vehicles is increasing, and some vehicles have at least 10 radar sensors. Second, the automotive market has high demands on suppliers. In order to achieve ADAS and autonomous driving technology, OEM manufacturers hope that the relevant sensors can be smaller, faster and cheaper while improving safety. As a result, some existing radar systems in development are integrating the transmitter, receiver, clock, and baseband functions into a single chip, which requires CMOS technology support.
By integrating CMOS technology, integrating embedded microcontrollers (MCUs) with digital signal processing (DSP) and intelligent radar front ends, TI has achieved this through seven years of research and development in the field of sensing, and has introduced a single-chip CMOS mm. Wave radar solution. Since the chip is based on a 45nm RF CMOS process, its size is only 10.4mm x 10.4mm. As a result, the overall difficulty of developing a new generation of 77G radar has been greatly reduced, and the pass rate and cost have also changed greatly. The promotion of the industry can be said to be very large. Shanghai Mogina's success with TI's single-chip CMOS millimeter-wave radar solution is a good example.
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