APERTURE SYNTHESIS RADIO METER USING DIGITAL BEAM FORMING TECHNIQUE

摘要

PURPOSE: To visualize a microwave with a digital image processor, by combining multiple parallel antenna arrays to an A/D conversion means, for visualizing a digital signal with the use of a digital bear formation means. CONSTITUTION: Two, substantially parallel, linear active reception antennas 12a and 12b face in the direction which crosses a travel direction (v), to the earth 11, and a fan beam 13 which provides a cross track resolution for scene is generated, and a collected radio wave is converted (16) into a digital signal, and then supplied to a digital beam former 18, so that one set of fan beam signal is generated for each antenna 12a and 12b. The fan beam signal set is, then, processed with a digital interference device 20, so that a corresponding fan beam signal pair from 2 set of fan beam signals are related to each other. The process generates a chirp signal for each pair of the fan beam signal, and the chirp signal is processed with a matching filter 22, so that each chirp signal is converted into an image corresponding to a scene.