US Patent 7727013 Low PIM rotatable connector

A coupling arrangement between a coaxial connector body and an outer conductor of a coaxial cable that includes an annular contact groove provided in a bore of the connector body. The contact groove has a groove bottom, a connector end sidewall and a cable end sidewall. The connector end sidewall is angled to transition between a groove bottom width that is less than a groove top width. A spring contact has a non-deformed state width seated within the contact groove. The non-deformed state width is greater than the groove bottom width and less than the groove top width. In a non-deformed state the spring contact contacts the connector end sidewall, without contacting the groove bottom.