METHOD AND BALUN FOR TRAPPING RF CURRENT ON A TRANSMISSION LINE AFTER INSTALLATION

摘要

Apparatus and method for a radially attachable RF trap attached from a side to a shielded RF cable. In some embodiments, the RF trap creates a high impedance on the outer shield of the RF cable at a frequency of RF signals carried on at least one inner conductor of the cable. In some embodiments, an RF-trap apparatus for blocking stray signals on a shielded RF cable that has a peripheral shield conductor and a inner conductor for carrying RF signals includes: a case; an LC circuit having a resonance frequency equal to RF signals carried on the inner conductor; projections that pierce and connect the LC circuit to the shield conductor; and an attachment device that holds the case to the cable with the LC circuit electrically connected to the shield conductor of the shielded RF cable.

主权项

1. An RF-trap apparatus for blocking stray signals on a transmission line that has a plurality of conductors for carrying RF signals and an insulating layer, the RF trap apparatus comprising:
a case; an LC circuit that is mounted to the case and that has a resonance frequency at a frequency of the RF signals carried on at least one of the plurality of conductors; a plurality of projections electrically connected to the LC circuit and configured to pierce the insulating layer and electrically connect the LC circuit to at least a first one of the plurality of conductors of the transmission line; and an attachment device configured to hold the case to the transmission line with the LC circuit electrically connected to the transmission line.