Patent ID: 6703910
Filing Date: 2004-03-09
Classification: H01F,H03H

Abstract:
A Radio Frequency (â€œRFâ€ ) signal isolation system for isolating an RF signal from the AC current signal on a Printed Circuit Board (â€œPCBâ€ ) within a cable television (â€œCATVâ€ ) system carrying the RF signal and the AC current signal, wherein the R.F signal isolation system comprises:a CATV cable, said CATV cable adapted to provide a transmission path for said RF signal and said AC current signal; an RF choke having: a core having a first side and a second side; a first lead, said first lead adapted to be connected to the CATV; a first set of windings of N1 turns, wound clockwise around said first side of said core, having an input electrically connected to said first lead, wherein there is an offset between each of a first respective X turns of said N1 turns; a second set of windings of N2 turns, wound counterclockwise around said second side of said core, having an input electrically connected to an output of said first set of windings; a second lead, said second lead electrically connected to an output of said second set of windings; a resistor for damping the resonance of said RF choke, said resistor electrically interposed between a predetermined winding of said second set of windings and said second lead; and an RF jumper conductor, having a first end electrically connected to said first lead of said RF choke, a second end electrically connected to a tuning network, and adapted for transferring said RF signal to said tuning network.