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:
May. 08, 2001
Filed:
Jul. 08, 1999
Atsushi Sagisaka, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
A high efficiency antenna device suited for use in a mobile unit is provided. A pair of triplate antennas are stacked, in which a lower antenna includes a feeding probe for a horizontal polarization and an upper antenna includes a feeding probe for a vertical polarization. The feeding probes have patch edges at opposing ends in the polarization direction. A coupling slot for coupling the upper and lower antennas are disposed over the patch edges in the lower antenna. In-phase magnetic current runs through the patch edges, so that a phase match is obtained between the two slots, raising antenna efficiency. The feeding probe is disposed at an angle and oriented in a direction corresponding to a representative value of polarization angels of the traveling area, to thereby reducing polarization angle loss as a whole. In an array antenna extending in a transverse direction, the propagating direction of parallel plate mode waves at the lower antenna is matched with the longer side of the array, so that the parallel plate mode can be efficiently utilized.