Accession Number : ADD016002
Title : Layered Parallel Interface for an Active Antenna Array.
Descriptive Note : Patent, Filed 24 Jun 92, patented 21 Sep 93,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Waters, William M
Report Date : 21 Sep 1993
Pagination or Media Count : 13
Abstract : A transmit/receive layer is provided adjacent to an array of antenna elements. The transmit/receive layer has an array of transmit receive modules, each module associated with one of the antenna elements. An analog to digital converter and a digital to optical converter of one of the modules couple an RF signal from the associated antenna element to optical fibers. An optical to RF converter in each of the modules converts an amplitude modulated optical transmit signal from an optical fiber to an RF transmit signal for transmission by the associated antenna element. Frequency down and up converters can be added to perform super heterodyne frequency conversion based on a reference frequency control signal transmitted over the optical fibers. At the ends of the optical fibers opposite to the transmit/receive layer, a receive layer, a transmit layer, transmit and receive beamforming layers, dedicated signal synthesizer, control signals, and amplitude modulated optical diode lasers and photodiodes are provided.
Descriptors : *CONVERTERS, *PATENTS, *TRANSMITTER RECEIVERS, *ANTENNA ARRAYS, *FIBER OPTICS TRANSMISSION LINES, AMPLITUDE, ANALOG TO DIGITAL CONVERTERS, ANTENNAS, ARRAYS, BEAM FORMING, DIODES, FREQUENCY CONVERSION, LASERS, PHOTODIODES, SIGNALS, RADIOFREQUENCY, RADAR RECONNAISSANCE, SEMICONDUCTOR LASERS, SEMICONDUCTOR DIODES
Subject Categories : Electrical and Electronic Equipment
Fiber Optics and Integrated Optics
Active & Passive Radar Detection & Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE