Traditional energy harvesting systems have typically focused on a single energy source, such as radio frequency or solar ... capabilities into a wide range of surfaces and devices, this technology ...

a high frequency alternator capable of generating hundreds of kilowatts in the VLF radio frequency range. There is one operational Alexanderson alternator remaining in the world at the Varberg ...

Also called a "frequency band." See frequency bands, spectrum, satellite frequency bands and optical bands. (2) A group of frequencies that occur naturally such as the audio spectrum. See audio.

It has been a popular frequency range for many SETI programs. While the Microwave Window is a “cosmic quiet zone” the existence of the radio emission lines marking the Water Hole illustrates a problem ...

The friend’s radio didn’t come with a frequency display ... Because the radio has a very large range of operation, [Todd] will need to add external component to facilitate this.