Rectenna - Radio Frequency Rectennas

Radio Frequency Rectennas

The simplest crystal radio receiver, employing an antenna and a demodulating diode (rectifier), is actually a rectenna - although it discards the DC component before sending the signal to the earphones. People living near strong radio transmitters would occasionally discover that with a long receiving antenna, they could get enough electric power to light a light bulb. Researchers are experimenting the use of rectennae to power sensors in remote areas.

RF rectennas are used for several forms of wireless energy transfer.

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