Artist's impression of the European Space Agency's Biomass Earth Explorer satellite, with its 40-foot diameter radar antenna. Antennas are not usually the part of the spacecraft we talk about. It’s ...

To use a smaller antenna, we need a higher signal frequency, and that’s what we do when we apply modulation to the signal. Modulation is simply encoding the low frequency signal in the information of ...

Experimental technologies offer elegant, inexpensive solutions. Researchers are studying applications and materials for creating radio antennas that are sprayed onto a surface. Made from commercially ...

GPS can be a bit complex of a technology – you have to receive a signal below the noise floor, do quite a bit of math that relies on the theory of relativity, and, adding insult to injury, you also ...

Written by Joseph Darlington, P.E. When building any radio system, the scarcest and most precious system component is not the radios, the antennas nor the towers, but available “clean” radio channels ...

Antennas used with ground penetrating radar (GPR) come in different shapes and sizes. The largest antennas typically radiate the lower frequencies necessary to detect the deepest targets. The smallest ...

Portland, Ore. – A four-year skunk works effort at the University of Rhode Island in Kingston has cut the size of an antenna by as much as one-third for any frequency from the kHz to the GHz range.