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.
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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
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 also 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 car 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 currently 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
System diagram of automotive 77 GHz radar system
Infineon 24GHz transceiver chip
NXP's Freescale Carl's 77GHz automotive radar solution
NXP's Freescale is developing a radar prototype chip codenamed "Dolphin." Based on digital CMOS chip processing technology, the chip is designed for an optimal operating bandwidth of 80 GHz, but the product can operate in the 77 GHz to 81 GHz bandwidth.
NXP's CMOS-based 80GHz mini radar front-end transceiver chip
ST 24GHz/77GHz automotive radar solution
Domestic automotive microwave ∕ millimeter wave radar sensor development technology is difficult, especially the 77GHz millimeter wave radar sensor, the main factors are:
1. Foreign technology blockade against China
2. Lack of talent and experience in China
3. Components depend on imports
4. The processing technology is backward
5. Lack of test equipment
All of these have restricted the popularity of microwave ∕ millimeter wave radar sensors in domestic automobiles. With the popularity of microwave ∕ millimeter wave radar sensors in foreign developed countries, these constraints are gradually improving, especially for 24 GHz microwave radar sensors. It is not difficult to obtain components and test instruments.
What is even more gratifying is that Xiamen Yixing Semiconductor Technology Co., Ltd. has made breakthroughs in the 24GHz automotive active safety radar RF front-end IC. The company is the first high-tech enterprise in China to focus on the development of automotive radar RF front-end microwave/millimeter wave integrated circuits. It has independently developed a variety of microwave/millimeter wave integrated circuits with completely independent intellectual property rights. It is the only company in China that provides RF front-end MMIC solutions for 24GHz automotive active safety radars.
The company's MMIC sets such as SG24T1, SG24R1 and SG24TR1 with independent intellectual property rights have broken the monopoly of foreign countries and filled the domestic gap, laying a foundation for the development of China's automobile active safety industry chain and promoting the further improvement of the industrial chain. The solution enables blind spot detection (BSD), lane change assist (LCA)/offset warning (LDW), adaptive cruise control (ACC), and other automotive anti-collision radar applications.
Xiamen Yixing SG24TR1 radar launch receiving function module and evaluation board
In addition, Shenyang Chengtai Technology Co., Ltd. has recently made breakthroughs in the development of 77 GHz automotive millimeter wave radar. It is expected that this year's products will be available. Although it is still unclear about the product details, especially whether the front-end radar sensor integrated circuit is self-developed or uses foreign chips, in any case, this is a move worthy of a big book for the 77 GHz automotive millimeter-wave radar sensor industry in China. It is worth looking forward to.
Established in April 2015, Shenyang Chengtai Technology Co., Ltd. is an innovative enterprise focusing on high-tech technology research and development. Under the background of smart cars, the company has developed a 77GHz automotive millimeter-wave radar, aiming at the millimeter-wave civil radar. The field has become a leading technology research and development team in China.
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