Patent ID: 11879989
Assignee: ECHODYNE CORP.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 30:
31. A radar subsystem, comprising:
an electronically steerable transmit antenna including an array of transmit elements each configured to radiate a respective signal having a wavelength and each spaced apart from each adjacent one of the transmit elements by a respective first distance that is less than one half of the wavelength;
a beam-steering controller configured to cause the transmit antenna to form, from the radiated signals, a transmit beam pattern including a transmit side lobe;
a sparse receive antenna including an array of electronically steerable receive elements each configured to receive a respective signal having a wavelength and each spaced apart from each adjacent one of the receive elements by a respective first distance that is more than one half of the wavelength; and
a radar processing unit configured
to form, with the sparse receive antenna, a receive beam pattern including a receive-side-lobe null approximately aligned with the transmit side lobe if the transmit side lobe is a peak of the transmit beam pattern, and
to form, with the sparse receive antenna, a receive beam pattern including a receive-side-lobe peak approximately aligned with the transmit side lobe if the transmit side lobe is a null of the transmit beam pattern.