Radar system having a synthetic aperture on the basis of rotating antennae
AssigneeMesserschmitt-Bolkow-Blohm GmbH
InventorsHelmut Klausing, Horst Kaltschmidt
Life of this patent
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Abstract
The present invention relates to a radar system having a synthetic aperture on the basis of rotating antennae. In order to achieve real-time capacity with a high discrimination despite the high data flow, reference functions are determined by a geometry module and a circuit for dividing the strip illuminated by the antennae into a specific number of range intervals. As a result of the division of the overall analysis circuit into individual modules, a complete analysis of the incoming signals can take place despite the high data flow. By signals from additional kinematics sensors integrated into the tips of the rotor carrying the antennae, the reference functions are corrected for rotor movements which deviate from the ideal orbit.
Claims12
A radar system comprising at least one transmitter and at least one receiver, having at least one antenna for the transmitting and receiving of radar pulses, said antenna being arranged at the end of a rotating arm;
- means for demodulating and intermediate storage of reception signals;
- means for forming reference functions as a function of illumination geometry of said radar system of range intervals to be measured, of rotating-angle areas, of transmitting pulses as well as the height of said antenna above ground;
- means for storing said reference functions;
- means for correlating said reception signals with said reference functions;
- and
- means for displaying a correlation result;
- wherein the means for forming said reference functions includes:
- a geometry module, in which, from an opening angle and a depression angle of said antenna, the length of said rotating arm, and the height of said antenna above ground, the width is determined of a range strip illuminated by said antenna having inner and outer illuminated strip edges, as well as the range difference between the beams from said antenna to said inner and outer illuminated strip edges;
- a circuit for dividing said illuminated strip into a specific number of range intervals;
- and
- a module for forming said reference functions for said individual range intervals.
Dependencies are inferred from the claim text.