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:
Oct. 03, 2006
Filed:
Nov. 23, 2004
Applicants:
Shoichi Ohi, Tokyo, JP;
Hideya Matsubara, Tokyo, JP;
Naoto Ohyama, Tokyo, JP;
Inventors:
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 7/42 (2006.01); H01P 5/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A balun comprises an unbalanced terminal, two balanced terminals, and two ground terminals. The balun further comprises: a low-pass filter provided between the unbalanced terminal and one of the balanced terminals; and a high-pass filter provided between the unbalanced terminal and the other of the balanced terminals. The low-pass filter incorporates two coils and a capacitor. The high-pass filter incorporates two capacitors and a coil. The coils and the capacitors are made up of conductor layers of a multi-layer substrate.