Method for two dimensional doppler imaging of radar targets

摘要

A method for two dimensional imaging of a two or three dimensional target is disclosed. As shown, a radar transmitter transmits a beam on a beam axis originating at a position spaced from the target and a radar receiver receives return signals from the target. The stationary radar observes the precessing target whose normal to the two dimensional target plane (or whose axis through a three dimensional target) intersects the transmitted beam axis at a point, and forms a cone half angle with the beam axis. With the normal (or target axis) moving along a conical surface while precessing 2 Pi around the beam axis, signal returns from the target are processed to develop a two dimensional image of the target. The process is repeated at other cone half angles and a composite, reduced-sidelobe image generated by vectorial superposition of images at multiple cone half angles.