SQUARE WAVEGUIDE LINE UTILIZING PARABOLOID OF REVOLUTION MIRROR

摘要

PURPOSE:To flatten the equiphase plane of an electric field in the space of a square waveguide and to effectively radiate a feed power by performing feed to the space of the square waveguide consisting of a horn type waveguide via a paraboloid of revolution mirror. CONSTITUTION:The parabolic mirror 5 having a reflecting plane formed by a part of a paraboloid of revolution surface so that a wave propagating through the space A of the horn type waveguide in the inside of the horn type waveguide 4 having a curved wall can be bypassed to the space S of the square waveguide is provided at a feed path from the horn type waveguide 4 to the space S of the square waveguide. In other words, the equiphase plane of the electric field in the wave approaching the paraboloid of revolution mirror 5 after propagating through the space A of the horn type waveguide is distributed in spherical plane shape almost centering a virtual feed point 0, and a phase difference is generated in the electric field, however, since the cross-sectional shape of the paraboloid of revolution mirror 5 is formed by a part of a parabola, a spherical wave radiated from the virtual feed point 0 of the horn type waveguide 4 is converted to a flat wave by the paraboloid of revolution mirror 5, then, it is propagated to the space S of the square waveguide. Therefore, it is possible to utilize the feed power effectively.