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. 14, 2006
Filed:
Jan. 05, 2005
Dou Yuanzhu, Fukushima-ken, JP;
Yoshio Saito, Fukushima-ken, JP;
Dou Yuanzhu, Fukushima-ken, JP;
Yoshio Saito, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a slot antenna in which the radiation toward the zenith direction is not obstructed although it is arranged on an upper side of a ground conducting plate. The antenna deviceoperates as the slot antenna by providing a slotin an upper plate portionof a shield case. The shield caseis provided on a ground conducting plate. The slotis composed of a first apertureextending in a straight line, a second aperturecommunicating with one end of the longitudinal direction of the first aperture, and a third aperturecommunicating with the other end of the longitudinal direction of the aperture. The aperturesandhave the same triangular shapes which are point-symmetrical to the center of the aperture. When the power is fed by a feeding pinto excite the slot, the directions of the electric fields generated at the aperturesandare inclined to the direction of the electric field generated at the apertureand the electric fields of the aperturesandcancel the electric field of the aperture