Patent ID: 7254374
Filing Date: 2007-08-07
Classification: H01P

Abstract:
1. A broadcast signal combiner, comprising: a first transmitter having an output port, wherein said first transmitter is configured to output a broadcast-compatible first analog signal, to operate on a specified channel, and to have a first power level; a second transmitter having an output port, wherein said second transmitter is configured to output a broadcast-compatible second analog signal on the specified channel and substantially synchronous with the first analog signal, having a second power level, and simultaneously output a broadcast-compatible digital signal having a third power level and conforming to In-Band On-Channel signal requirements that operates on the specified channel; a broadcast signal coupler having at least a first and a second input port, and at least a first and a second output port, wherein said first coupler input port is in communication with said first transmitter output port, and said second coupler input port is in communication with said second transmitter output port; a first phase shifter having at least an input port and an output port, wherein said first phase shifter input port is in communication with said broadcast signal coupler first output port; a second phase shifter having at least an input port and an output port, wherein said second phase shifter input port is in communication with said broadcast signal coupler second output port; a multiport combiner having at least a first and a second input port and at least a first and a second output port, wherein said multiport combiner first input port is in communication with said first phase shifter output port, and wherein said multiport combiner second input port is in communication with said second phase shifter output port; and a load coupled to said multiport combiner second output port.