Patent ID: 6859184

Claim:
A polarized wave separating mechanism for separating polarized wave signals from first and second polarized wave components, comprising: a substrate portion having an opening and provided with a pair of radio wave receiving portions; a waveguide arranged on a side of one surface of said substrate portion, and provided with a septum portion therein; and a radio wave reflecting portion arranged on the side of the other surface of said substrate portion and provided with a radio wave reflecting surface on an inner side; wherein said septum portion is extended through said opening to said radio wave reflecting portion so as to separate respective polarized waves received by said pair of radio wave receiving portions; and a space between said septum portion and said radio wave reflecting portion is set such that an end surface of said waveguide on the side of said substrate is in contact with a grounding surface provided on one surface of said substrate portion, and an end surface of said radio wave reflecting portion on the side of said substrate portion is in contact with a grounding surface provided on the other surface of said substrate portion.