Patent ID: 7948442

Claim:
A radio wave receiving converter for receiving a satellite broadcast, comprising: a main body portion including a first waveguide having a male thread portion on an outer circumference of said first waveguide; a feedhorn including a second waveguide having a female thread portion on an inner circumference of said second waveguide that is screwed on said male thread portion; a ring-shaped member arranged so as to cover a portion having a circumferential gap between the outer circumference of said first waveguide and the inner circumference of said second waveguide in a connecting portion between said first waveguide and said second waveguide, and including a circumferential wall portion and an annular step portion such that a groove portion where a portion near a tip of said second waveguide is inserted between said ring-shaped member and the outer circumference of said first waveguide is formed; and a sealing agent injected into said groove portion.