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:
Apr. 13, 2021
Filed:
Sep. 13, 2016
Fujikura Ltd., Tokyo, JP;
Yuta Hasegawa, Sakura, JP;
Ning Guan, Sakura, JP;
FUJIKURA LTD., Tokyo, JP;
Abstract
Provided is a phased array antenna which can be used in the millimeter wave band and whose cost is lower than that of a conventional phased array antenna. The phased array antenna () includes: an optical modulator (OM) configured to generate a signal light beam SL by carrying out intensity modulation on a carrier light beam CL by use of a sum signal V(t), the sum signal V(t) being obtained by adding an intermediate frequency signal V(t) and a local signal V(t); and a time delay device (TD) configured to generate delayed signal light beams SL', SL′, . . . and SL′n by imparting time delays Δt, Δt, . . . and Δtn to the signal light beam SL. Each feeding circuit (Fi) generates, from a corresponding delayed signal light beam SL′i, a delayed radio frequency signal V(t−Δti) to be supplied to an antenna element (Ai).