| 摘要 |
PURPOSE:To obtain an excellent cross polarization identification characteristic, by forming plural reflection mirror in such a way that the cross polarization components produced by the reflecting mirrors can be compensated by each other and providing an elliptical waveguide between the horn and polarization coupler of the antenna system of a receiving system. CONSTITUTION:Plural reflection mirrors 5', 6', and 7' are formed in such a way that the cross polarization components produced by the reflecting mirrors 5', 6', and 7' can be compensated geometrically by each other. A waveguide 9 which is rotatable around its axis and has an elliptical internal cross section is provided between the horn 4' and polarization coupler 2' of the antenna system of a receiving system. Then the polarization coupler 2' is adjusted so that the right and left peaks of the cross polarization pattern in the horizontal plane can become the same level. Thereafter, the waveguide 9 is rotated by a prescribed angle. Therefore, an excellent cross polarization identification characteristic can be obtained.
|
