A microwave technique to reduce platform motion and scanning noise in airborne moving target radar

The results of an investigation of an airborne moving target radar, which substantially eliminate´s platform motion noise and scanning noise, are summarized. A form of microwave data processing is used which is equivalent to a matched filter wherein the aperture is utilized as a spatial frequency filter. The microwave data of a simultaneous lobing (monopulse) antenna are processed by combining the even and odd illumination functions properly to stabilize the far field amplitude and phase radiation functions in space. The necessary conditions for elimination of these noise components from the cancelled residue are derived. Computation results of the effectiveness of the technique using realizable source illumination functions are presented with verification by experimental radiation pattern data. Far field phase diffraction patterns are presented to demonstrate how control of the source illumination function laterally shifts the antenna phase center. Because phase radiation patterns of large aperture antennas are unusual, the measurement technique is described.