A feed horn structure in which a feed horn and a horn cap can be combined
without generating whitening, crack and the like, a manufacturing method
thereof, a converter having that feed horn structure, and a satellite
communication receiving antenna can be obtained. The feed horn structure
of a satellite communication receiving converter includes a cylindrical
feed horn receiving a radio wave from an antenna portion and guiding the
radio wave, and a horn cap fixed to the feed horn so as to surround one
end of the feed horn at antenna side. The feed horn and the horn cap are
integrated by integral molding.