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 ...

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 ...

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 ...

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 ...

Physicists have used a small glass bulb containing an atomic vapor to demonstrate a new form of antenna for radio waves. The bulb was 'wired up' with laser beams and could therefore be placed far from ...

An origami-inspired reflectarray antenna developed by researchers at Institute of Science Tokyo enables CubeSats to achieve ...

Researchers developed and tested a deployable antenna for the 3U CubeSat OrigamiSat-2. Weighing only 64 grams and achieving a ...

(Nanowerk News) 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 ...