Accession Number : ADD014306

Title :   Focal Plane Antenna Array for Millimeter Waves.

Descriptive Note : Patent Application, Filed 29 Jun 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Waters, William M

Report Date : 29 Jun 1989

Pagination or Media Count : 26

Abstract : A millimeter wave imaging system receives millimeter wave radiation and provides video imaging signals based thereon. The system comprises an imaging lens for receiving incoming radiation; a focal plane antenna array disposed at the focal plane of the lens on which radiation received by the lens is focussed; and signal processing and display circuitry for processing the output of the antenna array and for producing and displaying corresponding video imaging signals. The focal plane antenna array comprises a planar array of a plurality of conical horns and circular waveguides which, in use, are disposed at the focal plane of the lens; and a stripline detector assembly coupled to the waveguides for detecting the radiation received thereby. The stripline detector assembly comprises a dielectric substrate having a plurality of microstrip conductors embedded therein, each microstrip conductor being coupled to a respective one of the waveguides, and a diode detector being connected to each microstrip conductor. A solid state commutator samples the output of the detectors and provides a resultant video imaging control signal. Patent applications. (RRH)

Descriptors :   *ANTENNA ARRAYS, *MILLIMETER WAVES, *PATENT APPLICATIONS, CIRCUITS, CIRCULAR, COMMUTATORS, CONICAL ANTENNAS, CONTROL, DETECTORS, DIELECTRICS, DIODES, ELECTRIC CONDUCTORS, FOCAL PLANES, HORN ANTENNAS, IMAGES, RADIOFREQUENCY LENSES, OUTPUT, PLANAR STRUCTURES, SIGNAL PROCESSING, STRIP TRANSMISSION LINES, SUBSTRATES, VIDEO SIGNALS, WAVEGUIDES

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE