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:
Sep. 04, 1990
Filed:
Jul. 05, 1988
Daniel C Buck, Hanover, MD (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A movable optical fiber system for directing test and calibration signals to the individual transmit-receive modules of a phased array antenna is provided with a laser device for generating optic signals. The laser device also includes a circuit for amplitude modulating the optic signals prior to their exiting the laser device. A fixed length of fiber-optic cable is connected with the laser device for directing the generated optic signals to a photodiode secured for movement to a motion device positioned adjacent the antenna face. The photodiode converts the optic signals to equivalent microwave signals, and the microwave signals are thereafter passed through a waveguide connected with the photodiode. Both the photodiode and waveguide are moved in a preselected linear path across the antenna face by the motion device; and, as the motion device operates to move the photodiode and waveguide, microwave test and calibration signals are discharged from the waveguide to be received by the individual transmit-receive modules in succession.