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:
Dec. 26, 1989
Filed:
Dec. 30, 1988
Yoshihiko Kuwahara, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A microwave landing system in which a beam scanning antenna is provided with an amplifying function to constitute an active array, a traditional power amplifier and the like are omitted to enhance the reliability of operation. The outputs of phase shifters each being associated with a respective one of radiating elements are connected to 1/2 dividers each having p-i-n diodes at opposite output terminals thereof, and the p-i-n diodes of each 1/2 divider are turned on and off alternately. Output signals are fed to radiating elements and a multiplexer with a minimum of loss.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile