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. 09, 1990
Filed:
Dec. 15, 1988
Masao Kodera, Okazaki, JP;
Seishin Mikami, Aichi, JP;
Nippon Soken, Inc., Nishio, JP;
Abstract
In a planar array antenna in which radio frequency power fed by a feeder line is radiated from a plurality of radiation elements disposed in a planar state on one surface of a dielectric substrate on the other surface of which the feeder line is disposed, the feeder line has a first feeder part and a second feeder part. The first feeder part is spaced apart by a predetermined distance from the marginal contour of one of the radiation elements in the planar direction of the dielectric substrate, while the second feeder part is located within the width of the marginal contour of another one of the radiation elements and directly beneath the latter radiation element, and the second feeder part is divided into two parts with respective ends thereof confronting each other, the power coupling coefficient between the second feeder part and said another one radiation element is selected to be larger than that between the first feeder part and said one of the radiation elements, thereby making the planar array antenna operate with high radiation efficiency and small side lobes.