| 摘要 |
PURPOSE:To omit a circular/angular converter, to obtain an economical antenna and to reduce the quantity of reflected waves from a glid type circular polarized wave generator to a pyramid horn by constituting a parabolic antenna by a parabola, a pyramid horn by constituting a parabolic antenna by a parabola, a pyramid corn, a down converter, an apex matching plate and the glid type circular polarized wave generator. CONSTITUTION:The circular polarized wave parabolic antenna is constituted by the parabola 1, the pyramid horn 14, the down converter 6, the elliptical cone type apex matching plate, and the glid type circular polarized wave generator 10 The terminal of the converter 6 is formed like a square and directly connected to the pyramid horn 14, so that the circular/angular converter can be omitted. Straightly polarized radio waves are radiated from the pyramid horn 14 and converted into circularly polarized waves by the glid type circular polarized wave generator 10 and the converted circular polarized waves are reflected, irradiated to the parabola 1 and then radiated to the space. The center axis of the pyramid horn 14 is made coincide with that of the apex matching plate 15 and the longitudinal direction of an opening of the pyramid horn 14 is made coincide with the apse line direction of the ellipse of the apex matching plate 15. Thus, the quantity of reflected waves from the circular polarized wave generator 10 to the pyramid horn 14 can be reduced. |
