The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 1986
Filed:
Nov. 20, 1984
Applicant:
Inventors:
Takeshi Matsuda, Tokyo, JP;
Harumi Kano, Tokyo, JP;
Assignee:
Showa Musen Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01P / ;
U.S. Cl.
CPC ...
333 25 ; 333 32 ;
Abstract
An impedance conversion transformer which comprises a ferrite core and a pair of coils wound about the ferrite core. The ferrite core has permittivity which reduces in proportion to increase in frequency within a band used and the pair of coils are wound in a bifilar arrangement so that the electric length of the coils becomes half-wave length. One of the coils has the opposite terminals electrically connected to each other and grounded and impedance variation and balanced to unbalanced conversion are achieved between the opposite terminals of the other coil.