Method and system to extend a useable bandwidth of a signal generator

A system to extend an operating bandwidth of a signal generator comprising:

• a signal generator to generate a first signal;
• an output port;
• a first transmission line extending between the signal generator and the output port;
• a local oscillator adapted to provide a second signal;
• a second transmission line extending from the local oscillator to transmit a the second signal;
• and
• one or more channels couplable between the first transmission line and the second transmission line, the one or more channels including:
• a first coupler having a length adapted to couple one or more of the frequencies of the second signal within a band of frequencies from the second transmission line to the channel,
• a mixer connectable with the signal generator to receive the first signal, the mixer adapted to receive the second signal coupled to the channel by the first coupler and generate a plurality of output signals;
• a second coupler having a length adapted to couple one or more of the output signals of the mixer from the channel to the first transmission line, and
• a filter arranged between the first coupler and the second coupler.

A method of extending an operating bandwidth of a signal generator comprising:

• generating a first signal with a signal generator;
• mixing the first signal with a second signal from a local oscillator in a mixer;
• outputting a plurality of output signals from the mixer to a first transmission line;
• providing a plurality of channels couplable to one or more output signals within a band of frequencies;
• wherein the band of frequencies couplable to a respective channel varies between the plurality of channels;
• coupling one or more of the output signals within a band of frequencies from the first transmission line to a channel from the plurality of channels;
• filtering the one or more of the output signals;
• coupling the filtered output signals from the channel to a second transmission line;
• and
• transmitting the filtered output signals to an output.