Airborne interrogation system
AssigneeThomson-CSF
InventorsRobert Pierrot, Francois Gautier, Pierre Crochet
Life of this patent
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Abstract
The system according to the invention utilizes a transmission--reception radar antenna protected by a radome and an interrogation antenna having at least one set of two networks engaged laterally on the outer wall of the radome. The networks are arranged symmetrically to an axis of revolution of the radome. Supply means supply the interrogation antenna with an ultra-high frequency interrogation signal and the switching and phase-displacement means and the networks constitute an electronic scanning antenna.
Claims15
An interrogation system, for an airborne radar which includes an antenna enclosed in the aircraft nose protected by a radome, comprising:
- an interrogation antenna decoupled from said radar antenna and including a first pair of radiating elements the first and second radiating elements of which are of a same first type and which are arranged laterally on the wall of the aircraft nose, symmetrically with respect to the axis of revolution of the aircraft nose;
- means for delivering to said interrogation antenna a microwave interrogation signal and control signal, and
- means for switching and phase shifting said interrogation and control signals, said switching and phase shifting means and the first and second radiating elements of the first pair forming an electronic scanning antenna wherein said means for switching and phase shifting the interrogation signal includes a first means for distributing the amplitude, in series with second means for disaiming the radar beam and a third means for controlling said first and second means wherein said third means includes in series a first circuit for coding the information defining the aiming position of the radar antenna and a set of PROM memories containing control information and delivering to the first and second means control signals depending on the aiming of the radar antenna.
Dependencies are inferred from the claim text.