Electronics & Semiconductors

Tiny switches give solid-state LiDAR record resolution

When Google unveiled its first autonomous cars in 2010, the spinning cylinder mounted on the roofs really stood out. It was the vehicle's light detection and ranging (LiDAR) system, which worked like light-based radar. Together ...

Computer Sciences

New AI sensor technology for autonomous driving

Researchers at TU Graz have modeled an AI system for automotive radar sensors that filters out interfering signals caused by other radar sensors and dramatically improves object detection. Now the system is to be made more ...

Other

Medevac helicopter flights could be grounded by new 5G rollout

The critically ill newborn baby was whisked by helicopter Saturday from rural Silverton, Oregon, to a children's hospital in Portland, the kind of life-saving transport Life Flight Network makes thousands of times a year.

Consumer & Gadgets

CTA announces availability of Rippleā€”an open radar API standard

Officials at the Consumer Technology Association have announced the development and availability of Ripple, an open radar API standard. The API is being presented as an industry standard for the interoperability of hardware ...

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Radar

Radar is an object detection system that uses electromagnetic waves to identify the range, altitude, direction, or speed of both moving and fixed objects such as aircraft, ships, motor vehicles, weather formations, and terrain. The term RADAR was coined in 1941 as an acronym for radio detection and ranging. The term has since entered the English language as a standard word, radar, losing the capitalization. Radar was originally called RDF (Radio Direction Finder, now used as a totally different device) in the United Kingdom.

A radar system has a transmitter that emits microwaves or radio waves. These waves are in phase when emitted, and when they come into contact with an object are scattered in all directions. The signal is thus partly reflected back and it has a slight change of wavelength (and thus frequency) if the target is moving. The receiver is usually, but not always, in the same location as the transmitter. Although the signal returned is usually very weak, the signal can be amplified through use of electronic techniques in the receiver and in the antenna configuration. This enables radar to detect objects at ranges where other emissions, such as sound or visible light, would be too weak to detect. Radar is used in meteorological detection of precipitation, measuring ocean surface waves, air traffic control, police detection of speeding traffic, and by the military.

This text uses material from Wikipedia, licensed under CC BY-SA