| Amplifier (7) |  |
| Antenna (16) | |
| Circuits (153) | |
| Consumer electronics (27) | |
| Data logger (3) | |
| Electrode (63) | |
| Electronic converters (2) | |
| Electronic device (26) | |
| Electronic equipment (2) | |
| Logic gate (1) | |
| Microchip (5) | |
| Receiver (3) | |
| Sensor (260) | |
| Transmitter (4) | |
| Amplifier (7) | |
| Antenna (16) | |
| Circuits (153) | |
| Consumer electronics (27) | |
| Data logger (3) | |
| Electrode (63) | |
| Electronic converters (2) | |
| Electronic device (26) | |
| Electronic equipment (2) | |
| Logic gate (1) | |
| Microchip (5) | |
| Receiver (3) | |
| Sensor (260) | |
| Transmitter (4) | |
and football-field sized antennas.####For#space-based solar power (SBSP), there would be two basic steps,
The microwave transmission that would deliver SBSP s electricity from an orbiting antenna to terrestrial rectennas would be##2 million times the power of that produced by the microwave oven.##
The primary culprit in smartphone battery drain is an inefficient power amplifier a component that is designed to push the radio signal out through the phones antennas.
classical dipole patch antennas have been used.""Now, our technology introduces'metasurfaces'that are much better energy collectors than classical antennas,
"explained Omar M. Ramahi, professor of electrical and computer engineering. Metasurfaces are formed by etching the surface of a material with an elegant pattern of periodic shapes.
"Conventional antennas can channel electromagnetic energy to a load --but at much lower energy absorption efficiency levels,"said Ramahi."
"Our research enables significantly higher energy absorption than classical antennas, "Ramahi said.""This results in a significant reduction of the energy harvesting surface footprint.
designed to hold a camera, LED light, an integrated circuit for receiving control instructions and transmitting data, antenna, 1. 5v button battery and, at the rear, the drive unit, to
#Scientists print low cost radio frequency antenna with graphene ink (Nanowerk News) Scientists have moved graphene--the incredibly strong and conductive single-atom-thick sheet of carbon--a significant step along the path
Researchers from the University of Manchester, together with BGT Materials Limited, a graphene manufacturer in the United kingdom, have printed a radio frequency antenna using compressed graphene ink.
The antenna performed well enough to make it practical for use in radio-frequency identification (RFID) tags and wireless sensors,
the antenna is flexible, environmentally friendly and could be cheaply mass-produced. The researchers present their results in the journal Applied Physics Letters,
Paving the Way to Antennas, Wireless Sensors, and More The researchers tested their compressed graphene laminate by printing a graphene antenna onto a piece of paper.
The antenna measured approximately 14 centimeters long, and 3. 5 millimeter across and radiated radio frequency power effectively,
said Xianjun Huang, who is the first author of the paper and a Phd candidate in the Microwave and Communcations Group in the School of Electrical and Electronic engineering.
either--the antenna and power-converting circuit can only extend the battery life of an iphone 6 by about 30,
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