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:

1976-01-13

Pagination or Media Count:

5.0

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