Patent ID: 6426970
Filing Date: 2002-07-30
Classification: H04B

Abstract:
A bi-directional signal coupler apparatus for the transmission and reception of signals over a single transmission medium utilizing a common path for both transmission and reception, said bi-directional coupler comprising:a primary means for removing a signal to be transmitted through said bi-directional signal coupler from a signal to be received into said bi-directional signal coupler, said primary removing means providing an output signal representative of the signal to be received plus the signal to be transmitted wherein a level of the signal to be transmitted is removed to a first extent relative to a level of the signal to be received; and at least one additional secondary means for removing the signal to be transmitted from the signal to be received in a successive manner, wherein said at least one additional secondary removing means operates upon the output signal of said primary removing means and is disposed for successively providing a further reduction in the level of the signal to be transmitted relative to the level of the signal to be received.