Snap-on triaxial cable balun and method for tuned trapping of RF current

摘要

Apparatus and method for trapping RF on shields of a multiply shielded RF cable. In some embodiments, the RF trap shorts an outer conductor shield to an inner shield conductor of the cable successively at selected locations along an end length of the shield conductors. Some embodiments provide an RF-trap apparatus for blocking stray signals on a shielded RF cable that has two or more concentric peripheral shield conductors separated from one another by one or more electrically insulating layers, and at least one inner conductor for carrying RF signals. The RF trap apparatus includes: a first housing; and a plurality of projections configured be coupled to the first housing and to move to selectively electrically connect an outer shield conductor to an inner shield conductor by a pierce operation on the shielded RF cable.