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:
Jan. 29, 2002
Filed:
Jul. 18, 2000
Mitsuru Muramoto, Tokyo, JP;
Kanemi Sasaki, Tokyo, JP;
Kiyohiko Itoh, Sapporo-shi, Hokkaido, JP;
Manabu Yamamoto, Sapporo, JP;
Other;
Abstract
A slot array antenna with a cavity of a simple construction having a plurality of slots formed on a dielectric substrate and capable of providing good directional characteristics while minimizing inter-slots coupling. The slot array antenna ( ) includes a power supply line in the form of a micro-strip line formed on one surface of the dielectric substrate, a slot antenna portion ( ) with a plurality of slots ( ) formed on the other surface of the dielectric substrate in an array-like fashion so as to extend perpendicularly to the micro-strip line with the dielectric substrate interposed therebetween, and a reflector ( ) with a cavity ( ) having an opening disposed in opposition to a plane on which the plurality of slots ( exist). In this case, if the cavity has a width narrow enough to cut off a frequency of radio waves to be used, the directionality of the slot array antenna can be optimized.