Patent · US Active

Method for production of an antenna core

US7818874B2 · kind B2 · utility

0Cited by

16References

7Claims

0Family size

Assignee

Vacuumschmelze GmbH & Co. KG · DE

Inventors

Giselher Herzer · Bruchköbel, DE
Franz Till · Langenselbold, DE
Harald Hundt · Dieburg, DE

Key dates

Filing date	Jul 8, 2009
Grant date	Oct 26, 2010
Priority date	—
Expiry date	Jul 8, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49016
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An antenna core comprises a flexible stack of a plurality of oblong soft-magnetic strips consisting of an amorphous or nanocrystalline alloy. The strips of said antenna core are separated from one another by an electrically insulating film each. The amorphous or nanocrystalline alloy has a magnetostriction value lambdas in the range of +4<.>10<−6> to −4<.>10<−6> and a linear BH loop. The coefficient of induction L of the antenna core changes at 60 kHz at a center distortion by 25% of its length by less than 10% and the quality Q of the antenna core is >=10 at 60 kHz.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.