US 12,265,174 B2
AESA TX pulse pair radiation pattern phase conjugation for low side lobe/maximum EIRP radiation pattern
James B. West, Cedar Rapids, IA (US); Venkata A. Sishtla, Cedar Rapids, IA (US); Jiwon L Moran, Marion, IA (US); and Jacob G. Teague, West Melbourne, FL (US)
Assigned to Rockwell Collins, Inc., Cedar Rapids, IA (US)
Filed by Rockwell Collins, Inc., Cedar Rapids, IA (US)
Filed on Nov. 2, 2021, as Appl. No. 17/517,244.
Prior Publication US 2024/0319330 A1, Sep. 26, 2024
Int. Cl. G01S 7/28 (2006.01); G01S 7/282 (2006.01); G01S 13/02 (2006.01); G01S 13/95 (2006.01)
CPC G01S 7/2813 (2013.01) [G01S 7/282 (2013.01); G01S 2013/0254 (2013.01); G01S 13/95 (2013.01)] 12 Claims
OG exemplary drawing
 
9. A radar system comprising:
at least one active electronically scanned array (AESA) antenna;
at least one processor in data communication with each of the at least one AESA antennas and a memory storing processor executable code for configuring the at least one processor to apply signals to the at least one AESA antenna via intervening circuitry to:
generate a first radar pulse at a time t0, having a first radiation pattern defining a main beam and a plurality of side lobes;
illuminate a target with the first radar pulse;
generate a second radar pulse at a time t1, after the time t0, having a second radiation pattern defining a main beam and a plurality of side lobes;
illuminate a target with the second radar pulse;
receive a first return signal corresponding to the first radar pulse; and
receive a second return signal corresponding to the second radar pulse; and
the at least one processor is configured to:
store the first return signal for a duration of t1−t0;
record a change in relative position of the radar system during the duration t1−t0;
calculate a further duration correction based on a propagation delay difference between the first radar pulse and the second radar pulse; and
combine the first return signal and the second return signal,
wherein the side lobes of the second return signal are out of phase with the side lobes of the first return signal.