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:
Nov. 26, 2002
Filed:
Aug. 21, 2000
Eiichiro Hirose, Chichibu-gun, JP;
Akikazu Toyoda, Chichibu-gun, JP;
Yoshiomi Go, Chichibu-gun, JP;
Shinji Sakai, Chichibu-gun, JP;
Hiroaki Tanidokoro, Chichibu-gun, JP;
Naoto Kitahara, Chichibu-gun, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Abstract
The present invention relates to an antenna device to be used for portable communication sets and a method for reducing the manufacturing cost thereof. The antenna device includes a substrate having at least one of a dielectric material and a magnetic material and having upper and lower faces as well as a pair of side faces on which convex portions and concave portions are alternately formed. Also included is a helical conductor layer formed on the upper and lower faces, and on the concave portion or convex portion on a pair of the side faces of the substrate so as to spirally surround the entire substrate.