High-Resolution Beamforming Microwave Interferometric Radiometer

The concept of a new type of high-resolution microwave interferometric radiometer (MIR) using beamforming antennas is proposed in this paper. Using large sampling intervals can effectively reduce the system complexity of large-scale arrays, but aliasing effect is also magnified. Through dedicated simulations, the aliasing effect can be suppressed when the interferometric element size exceeds the sampling interval, thus a dual-arm Y-shaped array is recommended for the overall system design. A ground-based demonstrator is currently under development, accompanied by preliminary experimental results.