Accession Number : ADD003590

Title :   Noise Cancelling Magnetic Antenna for Use with Watercraft.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Powers,Kerns H ; Stetz,Lewis L , Jr

Report Date : 14 Oct 1975

Pagination or Media Count : 6

Abstract : An antenna for extremely low frequencies (less than 3 KHz) comprising a conductor wound coaxially around a cable for substantially its full length and then wound back on itself in the same sense as the initial forward winding to place both terminals at one end of the antenna. The forward and return helices are in series electrical connection thus providing an increased S/N ratio. The chief advantage of the double helix over the normal helix is that the unbalance due to vibration induced noise is compensated essentially turn-to-turn. (Author)

Descriptors :   *Patents, *Submarine antennas, *Helical antennas, *Noise reduction, Magnetic devices, Cancellation, Low frequency

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE