Shaped beam antenna

Abstract

Abstract PURPOSE:To prevent a radio wave reflected from a main reflecting mirror from being shielded by a primary radiator, by arranging the center axis of a beam of the primary radiator in a plane bisecting vertically a line segment tying two foci of two torus mirror surfaces. CONSTITUTION:The main reflecting mirror is constituted by combining torus mirror surface reflecting mirrors 6, 8 and rotary reflecting parabola reflectors 7, 9. The reflecting mirrors 6, 7 use a point F1 as a focus and the reflecting mirrors 8, 9 use a point F2 as a focus, and the reflecting mirrors 6, 7 and 8, 9 constitute respectively one composite torus mirror surface. On the other hand, the primary radiator 10 is arranged so that the center axis of the irradiated beam is brought into the negative Z axis in the plane bisecting vertically the line segments F1, F2 tying the points F1 and F2. Thus, the reflected wave irradiated from the radiator 10 and reflected on the main reflecting mirror is not shielded for the path by the radiator 10 in this way. Then, the impedance characteristic is not deteriorated because of the reflected wave from the main reflecting mirror returned directly to the radiator 10, and the adverse effect of scattered waves due to the radiator 10 is prevented.

Inventors

• 👤 Mitsuhiro Kusano
• 👤 草野　光裕

Bibliographic Details