| 摘要 |
PURPOSE:To remove a cross polarization component, by making a beam direction between two subreflectors a reference direction, providing a center shaft of the primary radiator on the position which is 180 deg. or less counterclockwise from said reference direction, and also setting the angle between a beam direction of the main reflector and the reference direction to 90 deg. or less. CONSTITUTION:The direction of M1 M2 is made a reference direction, an angle which is measured counterclockwise by seeing from the reference direction side is made positive, an angle which is made by the center shaft direction, F1 M1, of the conical horn 1 and the reference direction is made 180 deg. or less, and angles which are made by F1 M1, M W, and F1 F2, and the reference direction are made theta0, theta1, theta2, respectively. And the main reflector 2 is located under the subreflectors 3, 4, the subreflector 4 is made a concave mirror within the range of 0 deg.<theta1<90 deg. or -90 deg.theta1<0 deg., -90 deg.<theta2<0 deg., and an angle which is made by the center shaft of the primary radiator 1 and the rotary shaft of the main reflector 2 is made free, by which a cross polarization component is removed. |
