Mobility Solutions

New Bosch mid-range radar sensor Cost-effective basis for assistance and safety systems

  • 77 gigahertz radar sensor for assistance and safety systems
  • Front sensor with a range of 160 meters and detection angle of 45 degrees
  • Rear sensor with a range of 100 meters and detection angle of 150 degrees
  • Far more powerful and smaller than 24 gigahertz sensors
  • Can be integrated into vehicles easily thanks to compact design
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  • September 13, 2011
  • Mobility Solutions
  • Press releases
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press release

Bosch is currently readying a new mid-range radar sensor (MRR) for series production. It works in the same way as the current LRR3 long-range radar sensor in the 77 GHz frequency band, which means it can record the distance and position of obstacles with great precision, but is far less costly. When installed in the front of the vehicle, the new sensor has a range of up to 160 meters and a detection angle of 45 degrees. “The new mid-range radar sensor enables the cost-effective implementation of numerous safety and comfort functions,” says Dr. Werner Struth, president of Bosch Chassis Systems Control at Bosch, naming ACC (Adaptive Cruise Control) at speeds of up to 150 kilometers per hour and the predictive emergency brake assist function as examples. The new sensor can also be installed in the rear of the vehicle. “Here, it monitors blind spots or warns drivers of oncoming traffic when backing out of parking spaces,” adds Struth. Bosch is planning to start series production toward the end of 2012.

The mid-range radar sensor can be integrated with ease into either the front or rear of the vehicle. It can even be fitted out of sight behind the bumper. Thanks to its range and angle of detection, vehicles on the road ahead and those cutting in are detected early on – providing the ideal basis for the ACC Adaptive Cruise Control. At speeds from 0 to 150 kilometers per hour, the system automatically controls the set distance to the vehicle in front. In future, only higher target speeds achieved by high-end sedans will need a long-range radar sensor. It also facilitates a predictive emergency brake assist function, which detects when another vehicle is getting critically close. If the driver does not react, the system triggers a partial braking operation. At speeds of less than 30 kilometers per hour, it will even perform full automatic emergency braking.

Rear MRRs have a shorter range, but an even wider angle of detection. The sensors located in the rear corners create the basis for the lane change assistant, which monitors blind spots and warns of vehicles that are approaching quickly. The system also helps drivers handle tricky situations when backing out of parking spaces.

Powerful and compact thanks to 77 GHz frequency
Compared to existing 24 GHz versions, a 77 GHz sensor delivers enhanced performance in all areas. The new sensor’s object separation is up to three times better, and it can measure speeds and distances with three to five times the accuracy. The device is also much smaller than previous sensors, measuring less than 130 cubic centimeters. What’s more, it uses the frequency band permanently authorized for automotive applications worldwide. As a result, the Bosch 77 GHz MRR is ideal for global vehicle platforms. The silicon germanium technology used for the integrated high-frequency circuits enables a compact design without any moving parts.

Complementary radar and video sensors
Video sensors are the ideal complement for radar technology. Powerful software algorithms merge the sensor data to create a highly detailed “picture”, which is an interpretation of the situation ahead of the vehicle. Other assistance and safety functions, such as automatic full braking at higher speeds, can be added. At this stage, the system cannot prevent the accident, but it can significantly reduce the severity of the impact

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Mobility Solutions is the largest Bosch Group business sector. In 2015, its sales came to 41.7 billion euros, or 59 percent of total group sales. This makes the Bosch Group one of the leading automotive suppliers. The Mobility Solutions business sector combines the group’s expertise in three mobility domains – automation, electrification, and connectivity – and offers its customers integrated mobility solutions. Its main areas of activity are injection technology and powertrain peripherals for internal-combustion engines, diverse solutions for powertrain electrification, vehicle safety systems, driver-assistance and automated functions, technology for user-friendly infotainment as well as vehicle-to-vehicle and vehicle-to-infrastructure communication, repair-shop concepts, and technology and services for the automotive aftermarket. Bosch is synonymous with important automotive innovations, such as electronic engine management, the ESP anti-skid system, and common-rail diesel technology.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). The company generated sales of 70.6 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers some 150 countries. The basis for the company’s future growth is its innovative strength. Bosch employs 55,800 associates in research and development at 118 locations across the globe. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

Further information is available online at and,

PI7483 - September 13, 2011

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