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:
Aug. 15, 1989
Filed:
Sep. 21, 1988
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
A planar antenna is formed by providing a radiation circuit with a plurality of pairs of radiation elements respectively formed by a slot made in a conductive layer and having a patch element disposed in the slot, the radiation elements in each pair being in mutually positional relationship rotated by 90 degrees and different dimensional relationship, and electromagnetically coupling the respective radiation elements through power supply terminals with a power-supply circuit mutually with a phase difference of 90 degrees in each pair for a power supply between the both circuits, whereby the antenna is expanded in service band and increased in the cross polarization characteristics.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile