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Scientists built a sound ‘tractor beam’ that can move objects from nearly half a meter away
A tiny polystyrene bead hangs in midair, nearly 40 centimeters above a square array of ultrasonic emitters. No wire holds it.
Until recently phased array radar has been very expensive, used only for military applications where the cost of survival weighs in the balance. With the advent of low-cost microwave devices and ...
In the medical applications of ultrasonic imaging, sound waves of high frequency are usually employed to produce in-depth cross-sectional images of internal organs. Special multi-element transducers ...
Phased array antenna systems are at the cusp of ubiquity. We now see Multiple-Input Multiple-Output (MIMO) antenna systems on WiFi routers. Soon phased array weather radar systems will help to predict ...
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