Resolution in Radar Systems

The problem of azimuthal resolution in radar systems is discussed. It is shown how the resolution is related to the antenna beamwidth and thus in turn to the size of aperture. The possibilities of improving resolution beyond the normal capabilities is considered and the limitations are presented from two aspects. The first aspect is concerned with the attempt to build a "supergain" antenna. The second aspect is concerned with the attempt to achieve a similar result through the utilization of filter equalization techniques. It is shown that no essential improvement in resolution appears to be obtainable in a practical manner.