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Calibration to Mitigate Near-Field Antennas Effects for a MIMO Radar Imaging System
Ha Hoang1,2, Matthias John1, Patrick McEvoy1
1Antenna & High Frequency Research Centre, Technological University Dublin, D08 NF82 Dublin, Ireland.
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.
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