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:
Feb. 09, 2010
Filed:
Dec. 19, 2006
Minoru Hasegawa, Yokohama, JP;
Takao Shimamori, Yokohama, JP;
Minoru Hasegawa, Yokohama, JP;
Takao Shimamori, Yokohama, JP;
Abstract
Provided is a complex antenna which corresponds to both a circularly polarized wave and a linearly polarized wave. The complex antenna includes a substrate, a power feed terminal, four helical antenna devices disposed on the substrate at intervals of 90 degrees, four delay lines having different lengths by a quarter wavelength, and four switch modules which are connected to the power feed terminal in common and each of which is connected to each helical antenna device and each delay line. Each switch module selects one of a first mode in which the power feed terminal and each helical antenna device are directly connected and a second mode in which each delay line is connected to each helical antenna device so that a phase of a power feed fed from the power feed terminal and propagated from each delay line to each helical antenna device can be sequentially shifted by 90 degrees.