Sea Water Antenna (RF Cafe)
US Navy engineers at the SPAWAR System Center Pacific has developed a technology that uses the magnetic induction properties of sodium chloride (salt) in sea water to create a VHF antenna. Sea water is pumped from the ocean into a stream and the width and length of the stream determine the frequency capabilities. An eighty-foot-high stream could transmit and receive from 2 to 400 MHz with a relatively small footprint. The Sea Water Antenna is capable of transmitting and receiving VHF signals and has been tested at a receiving range of over thirty miles. The antennae needs of a typical Navy vessel with eighty metallic antennas could theoretically be replaced with only ten Sea Water Antennas of varying heights and streams to cover the same frequencies.