| 摘要 |
This antenna includes an electronic scanning array DELTA of dimensions DELTA and of scanning angle alpha 0, and a focusing system itself including an objective D of diameter D and focal length f and an eye piece D' of focal length f and f' and of magnification gamma such that gamma = f/f', which are placed on the axis of the array so that the array is situated in the focal plane of the eye piece and the eye piece in the focal plane of the objective, the assembly being equivalent to an electronic scanning antenna of dimensions D such that D/ DELTA = gamma and of scanning angle beta 0 such that beta 0 DIVIDED alpha 0 = 1 DIVIDED gamma . The objective D consists in particular of a Cassegrain antenna comprising a main reflector MP and an auxiliary reflector MA. Application to electronic scanning antennas. <IMAGE>
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