Reflective antenna system with correction of comatic lobe - has secondary excitation stage providing phases shift to suppress comatic lobe

摘要

The reflective antenna system has a reflector (RE) that has an associated main exciter (HE), shifted laterally from the focal point of the antenna, and an auxiliary exciter (HI), mounted laterally form the focal point of the antenna. Both are supplied by a common excitation network. The emission diagram of the antenna indicates a main lobe (HK) and a secondary lobe (NK). The auxiliary excitation stage is controlled to apply a comatic correction to the secondary lobe. This involves an adjustment to the phase with the result that the secondary lobe is greatly reduced. USE/ADVANTAGE - For reflective or lens antenna. Suppresses of comatic lobe.