Compositions – Magnetic – Iron-oxygen compound containing
Patent
1998-06-10
2000-03-07
Koslow, C. Melissa
Compositions
Magnetic
Iron-oxygen compound containing
336233, 333 25, H01R 134
Patent
active
060335939
ABSTRACT:
A BALUN transformer core material contains a Z-type hexagonal system ferrite having an in-plane anisotropy and a high magnetic permeability and such a high resonance frequency as to be in excess of a Snake's limiting line, and therefore, in the BALUN transformer core material, the frequency properties of the magnetic permeability are extremely good. A BALUN transformer core obtained by pressing and sintering this BALUN transformer core material has a high initial magnetic permeability and specific resistance. Moreover, a BALUN transformer obtained by applying a winding to the BALUN transformer core is provided with superior properties which are not poorer as compared with a BALUN transformer constituted of a conventional spinel ferrite, and it is a BALUN transformer having high properties which can be used in a high-frequency band of 300 MHz or more.
REFERENCES:
patent: 2946752 (1960-07-01), Jonker et al.
patent: 3100852 (1963-08-01), Peek et al.
Abstract for JP 3-161910, Jul. 11, 1991.
Onizuka Masahiro
Sato Kouki
Koslow C. Melissa
TDK Corporation
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