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. 02, 2007
Filed:
Apr. 01, 2004
Toshiaki Shirosaka, Kobe, JP;
Shingo Fujisawa, Kobe, JP;
Toshio Fujita, Kobe, JP;
Kiyotaka Tatekawa, Kobe, JP;
Eiji Shibuya, Kobe, JP;
Toshiaki Shirosaka, Kobe, JP;
Shingo Fujisawa, Kobe, JP;
Toshio Fujita, Kobe, JP;
Kiyotaka Tatekawa, Kobe, JP;
Eiji Shibuya, Kobe, JP;
DX Antenna Company, Limited, Kobe-Shi, JP;
Abstract
Folded dipole antenna elements () are disposed generally in parallel, being spaced by a distance smaller than a half of the wavelength employed. The antenna elements () are connected to a combiner () via feeders () having different lengths. The difference in length between the feeders () is such that received signals resulting from a radio wave coming to the antenna elements () from the front and received by the antenna elements () are in phase with each other at the inputs () of the combiner (), whereas received signals resulting from a radio wave coming to the antenna elements () from the back and received by the antenna elements () are 180° out of phase with each other at the inputs () of the combiner ().