Surface error diagnosis of large reflector antenna with microwave holography based on active deformation

摘要

Microwave holographic techniques have been used widely in the radio astronomy area. A new surface diagnosis method based on the phase-retrieval holograph algorithm is proposed. This approach focuses on a novel application of the active deformation. Multiple far-field patterns are measured in focus by adjusting the deformation of the main reflector actively. Using the amplitude of far-field patterns, the phase distribution of the aperture can be retrieved by the phase-retrieval technique. Simulation results demonstrate the feasibility of this method.