77GHz automotive radar solution, deterrence overseas manufacturers

Introduction: In the field of automotive active safety, automotive microwave/millimeter wave radar sensors are one of the core components. Following the breakthrough of Xiamen Yixing Semiconductor Technology Co., Ltd. in the 24GHz automotive active safety radar RF front-end IC, Shenyang Chengtai Technology Co., Ltd. also made breakthroughs in the development of 77GHz automotive millimeter-wave radar, breaking the monopoly of foreign countries and filling the domestic gap. It laid the foundation for the development of China's automobile active safety industry chain.

Due to the increasing safety standards of automobiles, the level of automotive electronics, and the growing demand for driving safety, the ADAS system with active safety technology is showing rapid development. Sensor technology is one of the key core technologies of automotive electronics. The innovative development of various sensor technologies provides technical feasibility for active safety. The automotive microwave/millimeter wave radar sensor is one of the core components to realize this function.

Figure 1 Key core technologies of automotive electronics

77GHz automotive radar solution, Weiwei three overseas manufacturers

In the field of active safety of automobiles, automotive microwave/millimeter wave radar sensors have become the industry's recognized mainstream choice because they can work around the clock and are not affected by bad weather such as light, haze and dust storms. They have huge market demand and are therefore automotive electronics. The current main research and development direction of the manufacturer.

According to the market research organization IHS, with the wide application of the ADAS system, the average annual growth rate of the automotive microwave/millimeter wave radar sensor market will be as high as 23%, and the total market demand is expected to reach 50 million by 2021.

In 2015, China's auto sales volume was 24.598 million units. Conservatively, according to China's auto sales volume of 20% (4.91 million units) equipped with automotive microwave/millimeter wave radar sensors, the market scale is considerable and the prospects are broad.

Automotive microwave/millimeter wave radars are favored by major automakers because of their strong resistance to environmental interference and high stability. Such applications have become popular in Europe and the United States. At present, almost all of the cars in these regions are equipped with automotive microwave/millimeter wave radars, including automobile collision avoidance radars and vehicle blind zone detection radars, while domestic high-frequency devices are more expensive to develop. Difficult to do, there have been few breakthroughs in the field of automotive electronics manufacturers.

The automotive microwave/millimeter wave radar is mainly composed of an antenna, a front-end radar sensor and a back-end signal processor. Among them, radar sensors are the most critical core components, and current automotive radar sensors are implemented using integrated circuit technology.

The domestic and international mainstream microwave/millimeter wave radar frequency bands are 24 GHz (for short to medium range radar, 15-30 meters) and 77 GHz (for long range radar, 100-200 meters).

Automotive microwave / millimeter wave radar sensor integrated circuits are basically three-point world, NXP, Freescale, ST and Infineon. All three have a complete automotive radar solution.

Infineon 24GHz/77GHz automotive radar solution

System diagram for automoTIve 24GHz radar system

77GHz automotive radar solution, Weiwei three overseas manufacturers

System diagram of automoTIve 77 GHz radar system

77GHz automotive radar solution, Weiwei three overseas manufacturers

Infineon 24GHz transceiver chip

77GHz automotive radar solution, Weiwei three overseas manufacturers

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