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. 06, 2005
Filed:
Jan. 29, 2004
Masahide Sato, Tokyo, JP;
Hideaki Shimoda, Tokyo, JP;
Masahide Sato, Tokyo, JP;
Hideaki Shimoda, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
An antenna device forms a discone antenna and comprises a pole-shaped base membercomposed of dielectric material. The pole-shaped base memberhas a cone-shaped inner space formed therein. In an inside surface of the pole-shaped base member, a first antenna elementis formed by patterning a metal conductor layer. Further, on a plain surface facing the outside of the pole-shaped base member, a second antenna elementis formed also by circularly patterning a metal conductor layer at the side of a top of the first antenna elementwith a predetermined space being kept between the top of the first antenna elementand the second antenna element. The first antenna elementand the second antenna elementare located with respective rotation central axes thereof being corresponding with each other.