Patent ID: 7034636

Claim:
An apparatus for reducing influence by selected signal components in a communication link; the apparatus comprising: (a) a first signal line coupled with a first signal source; said first signal line conveying a first communication signal from said first signal source; said first communication signal including a desired signal component and at least one undesired signal component; (b) a second signal line coupled with a second signal source; said second signal line conveying a second communication signal from said second signal source; said second communication signal substantially including said desired signal component and said at least one undesired signal component; (c) a signal treating unit coupled with said second signal line; said signal treating unit affecting at least one parameter associated with said second communication signal to present a modified second communication signal at a first output locus; said signal treating unit including a tunable bandwidth filter including at least one electronically tunable varactor unit; and (d) a signal coupling unit coupled with said first signal line and coupled with said first output locus; said signal coupling unit combining said first communication signal with said modified second communication signal to present an improved communication signal at a second output locus; said at least one undesired signal component affecting said improved communication signal less than said at least one undesired signal component affects said first communication signal.