公开(公告)号：US09664775B2

公开(公告)日：2017-05-30

申请号：US14499990

申请日：2014-09-29

Applicant: DELPHI TECHNOLOGIES, INC.

Inventor： Carlos A. Alcalde

IPC: G01S7/02 ,  G01S13/44 ,  G01S13/93

CPC classification number: G01S7/02 ,  G01S13/4454 ,  G01S13/931

Abstract: A radar system includes a radar antenna and a controller. The antenna includes a reference element, an alpha element spaced apart from the reference element by one half-wavelength of the reflected signal, and a beta element spaced apart from the reference element by an even number of half-wavelengths of the reflected signal. The controller is configured to determine an alpha phase difference between detected signals from the reference element and the alpha element, determine a beta phase difference between detected signals from the reference element and the beta element, and determine a first virtual phase difference that corresponds to the reflected signal expected to be detected by a first virtual element located halfway between the reference element and the beta element. The first virtual phase difference is based on the beta phase difference divided by two.