Monopulse detection systems

Details Monopulse detection systems Monopulse detection systems

G - Physics

01

S

343/48

G01S 13/48 (2006.01) G01S 13/68 (2006.01)

Patent

CA 1221442

ABSTRACT (Figures 2,4) A planar array (13) of radar antenna elements (B) used in a monopulse detection systems includes means to apply an appropriate phase ? by the phase delay (4) on transmission and reception so as to define only two beams. Received signals are added to give a sum beam (22), and for a normal beam perpendicular to the plane of the array appropriately weighted, signals are added in phase in a resistor network F1. A single difference beam (27) is generated by added receiver outputs in a second resistor network F2 with each output phase delayed (23) by a phase angle equal to the angular position of the detector measured from the array centre with respect to the array centre line (14). Then a target position can be defined by taking the ratio of the amplitudes and the relative phases of signals received by the sum and difference beams. Beam steering is done by applying additional phase delays to both beams to tilt the phase planes of the array as desired.

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