Engineers and scientists from the international KAUST team have developed handheld radar technology that targets drones and wearable electronics. It is useless for the military due to its extremely weak power, but it is optimal for household robots and navigation systems in confined spaces. It will also help make a breakthrough in the creation of implants for the disabled.
The device is based on a frequency-modulated continuous wave radar, which emits radio waves of different frequencies. This allows him to detect small objects such as doorknobs or objects lying on the table. The radar operates at a frequency of 24 GHz, has one transmitting and two receiving antennas - thanks to this, the angular displacement of the target can be estimated.
The radar weighs 150 grams, does not exceed a matchbox in dimensions, uses a 5 V battery as a power source.It can detect a walking person at a distance of 12 m, and objects with a larger cross-section and at a distance of 20 m. During the tests, the prototype was able to even to capture the breathing of a person at the other end of an ordinary room.
As befits a radar, the device detects objects, measures the distance to them, speed and motion vector. In its current version, the radar is already capable of performing up to 8 space scans per second. This is enough so that, for example, robots can navigate the terrain even when driving fast and not crash into obstacles.