Patent ID: 8816898

Claim:
A radar apparatus comprising: an array antenna having a plurality of antenna elements, each of the plurality of antenna elements being configured to perform at least one of radiating a probe signal at a predetermined timing and receiving an echo signal which is a reflection of the probe signal from a target; a converter configured to convert the echo signal to a baseband signal; and a processor configured to: generate a synthesized baseband signal vector by performing aperture synthesis of the baseband signal using a combination of a first antenna element and a second antenna element among the plurality of antenna elements, the first antenna element radiating the probe signal, the second antenna element receiving the echo signal, and the combination giving an equal spatial phase in different timings, acquire correction data based on coefficients of terms of a synthesized array polynomial obtained from product of an array polynomial of the first antenna element and an array polynomial of the second antenna element, correct the synthesized baseband signal vector in accordance with the correction data, and perform angle estimation of the target in accordance with the corrected synthesized baseband signal vector.