Magnetic composite body for antenna and antenna element using same

A graft copolymer (P) is obtained by graft-polymerizing 18-67 parts by mass of a monomer (B) to 100 parts by mass of a polymer (A). The polymer (A) is obtained by polymerizing an alpha-olefin, a conjugated diene, an unsaturated cyclic hydrocarbon or an ethylenically unsaturated bond-containing aroma...

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Main Authors SONODA KENSAKU, SHIROTA KENICHI, MIZUGUCHI KATSUNOBU, KAN RIKIYA, KUBOTA KAZUHIRO, KOIKE KIYOSHI, OHTA TOSHIHIRO
Format Patent
LanguageChinese
English
Published 20.07.2011
Subjects
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS
INDUCTANCES
INORGANIC CHEMISTRY
MAGNETS
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
METALLURGY
PRINTED CIRCUITS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:A graft copolymer (P) is obtained by graft-polymerizing 18-67 parts by mass of a monomer (B) to 100 parts by mass of a polymer (A). The polymer (A) is obtained by polymerizing an alpha-olefin, a conjugated diene, an unsaturated cyclic hydrocarbon or an ethylenically unsaturated bond-containing aromatic monomer. The monomer (B) is composed of an aromatic monofunctional ethylenically unsaturated monomer (b1) and a bifunctional ethylenically unsaturated monomer (b2), and the mass ratio (b1)/(b2) is within the range from 70/30 to 95/5. A magnetic composite body for an antenna is obtained by kneading a composition which contains the graft copolymer (P) and a spinel ferrite powder (F) having an average particle diameter of 0.05-20 micrometers at a mass ratio (P)/(F) of from 10/90 to 60/40.
Bibliography:Application Number: CN20098132632