Researchers report that lab tests of a new metasurface-based antenna that can harvest 100 microwatts of power, enough to power simple devices, from low power radio waves. This represents an important ...

WASHINGTON — Researchers have developed a new metasurface-based antenna that represents an important step toward making it practical to harvest energy from radio waves, such as the ones used in cell ...

RF antennas serve as an important link between user terminals and communication base station equipment. Radio waves, which are central to this process, are electromagnetic waves that propagate at a ...

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Scientists from the Polytechnic Institute of Novgorod State University, together with colleagues from a number of Chinese ...

Researchers at the University of Warsaw have unveiled a breakthrough method for detecting and precisely calibrating terahertz ...

A new ultra-low-power method of communication at first glance seems to violate the laws of physics. It is possible to wirelessly transmit information simply by opening and closing a switch that ...

Maximum transmission efficiency occurs when the load impedance matches the generator impedance. Engineers do this to eliminate standing waves, which can severely damage equipment. Transmission lines ...

Picture: military interrogators are talking to a local man they suspect of helping to emplace roadside bombs. The man denies it, even as they show him photos of his purported accomplices. But an ...