| 摘要 |
PURPOSE:To narrow the beam distance by arranging a main reflection mirror and a sub-reflection mirror symmetrically around a turning center axis and arranging a horn apart from the turning center axis in comparison with the sub-reflection mirror. CONSTITUTION:A radio wave radiated from the horn 1 is irradiated to the sub- reflection mirror 7, is reflected in the direction of the main reflection mirror 3 and goes to a propagating direction 5 of the radio wave. Similarly, the radio wave from a horn 1' goes to the sub-reflection mirror 7 and the main reflection mirror 3 and goes toward the propagating direction 5' of the radio wave. Since the main reflection mirror 3 and the sub-reflection mirror 7 are arranged symmetrically to the turning center axis 4, when the horn 1 is arranged symmetrically around the turning center axis 4 to the horn 1', the radio wave from the horn 1 and the radio wave from the horn 1' behave the same operation except the final propagating direction. Since the horn is placed apart from the turning center axis 4 in comparison with the sub-reflection mirror 7, the horn is arranged easily by keeping the angle from the turning center axis 4 to a constant value, and the beam distance is narrowed by arranging the horn approached nearly to be contacted conversely. |
