Accession Number : ADD002418

Title :   Core Design for Flexible H-Sensor for ELF.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Zenel,Joseph A ; McGuffin,William G ; Barnette,William E

Report Date : 13 Jan 1976

Pagination or Media Count : 5

Abstract : The patent describes a counterwound, magnetic core for a towed-cable helically wound, ELF antenna comprising a cylindrical, plastic, center insert, with or without a center conductor, with two strips or sets of strips of magnetic material counterwound about it so that a plurality of good-mechanical-contact, strip, crossover points are formed distributed around the circumference of the insert and down its length. An insulating material is then wrapped around these counterwound strips and a conductor helically wound around that. This design, by providing alternate flux paths down the core via the crossover points provides a lower, core reluctance and, when the core is under stress, provides a flux path that avoids the high-stress regions of the core thus reducing the amount of flux that is stress-modulated Thus a substantial magnetostrictive noise reduction is obtained.

Descriptors :   *Helical antennas, *Patents, Extremely low frequency, Magnetic cores, Towed bodies

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE