Calibration to Mitigate Near-Field Antennas Effects for a MIMO Radar Imaging System

Abstract

A calibration method for a high-resolution hybrid MIMO turntable radar imaging system is presented. A line of small metal spheres is employed as a test pattern in the calibration process to measure the position shift caused by undesired antenna effects. The unwanted effects in the antenna near-field responses are analysed, modelled and significantly mitigated based on the symmetry and differences in the responses of the MIMO configuration.

Keywords

• near-field antenna effect
• radar calibration
• MIMO radar
• turntable radar
• UWB radar
• radar system