Controlled-impedance cable termination with compensation for cable expansion and contraction

摘要

A controlled-impedance cable termination that minimizes the effects of cable expansion and contraction on impedance matching. The terminator has an anchor block, an expansion/contraction compensator (ECC) attached to the cable, a compliant signal contact for making the electrical connection between the cable center conductor and the electrical device. The ECC has an electrically-conductive ferrule with a bore. The ferrule bore may be formed in the anchor block instead of in a separate ferrule. The cable shield is attached at the bore. A solid dielectric insert fits into the ferrule bore. An electrically-conductive center pin fits into a bore in the dielectric insert and has a bore that accepts the center conductor such that the center conductor can expand and contracting while maintaining electrical contact with the center pin. A plate abuts the anchor block face and holds the compliant contacts through apertures.

主权项

1. A controlled-impedance cable termination for a controlled-impedance cable, the cable comprising at least one center conductor, a dielectric surrounding the at least one center conductor, and a ground shield surrounding the dielectric, the termination comprising:
(a) an electrically-insulative anchor block having a face and at least one cable through hole, the cable through hole having an opening in the face; (b) an electrically-conductive ferrule having a face and a ferrule bore, the ferrule adapted to make electrical contact with the cable ground shield, and the ferrule adapted to be installed in the cable through hole; (c) a dielectric insert adapted to be installed in the ferrule bore, the dielectric insert having a dielectric insert bore; and (d) an electrically-conductive center pin adapted to be installed in the dielectric insert bore, the center pin having a center pin bore adapted to electrically receive the cable center conductor such that the center conductor can slide in the center pin bore while maintaining electrical contact with the center pin as it expands and contracts, the center pin having a face planar with the ferrule face when installed in the dielectric insert bore.