Calibration apparatus and calibrating cross-frequency phases of large-signal network analyzer measurements

A process for calibrating cross-frequency phases of large-signal network analyzer measurements, the process comprising:

• producing, by a signal generator, a calibration signal and a reference multitone signal;
• a vector network analyzer in communication with the signal generator and comprising a forward coupler, a reverse coupler, a forward coupled receiver, a reverse coupled receiver, and a reference receiver and that receives the calibration signal and the reference multitone signal from the signal generator;
• receiving, by a forward coupler of a vector network analyzer, the calibration signal from the signal generator;
• producing, by the forward coupler, a forward coupled signal from the calibration signal;
• receiving, by a forward coupled receiver of the vector network analyzer, the forward coupled signal from the forward coupler;
• producing, by the forward coupled receiver, a forward digitized signal from the forward coupled signal;
• receiving, by a reverse coupler of the vector network analyzer, the calibration signal from the signal generator;
• producing, by the reverse coupler, a reverse coupled signal from the calibration signal;
• receiving, by a reverse coupled receiver of the vector network analyzer, the reverse coupled signal from the reverse coupler;
• producing, by the reverse coupled receiver, a reverse digitized signal from the reverse coupled signal;
• receiving, by a reference receiver of the vector network analyzer, the reference multitone signal from the signal generator;
• producing, by the reference receiver, a reference digitized signal from the reference multitone signal;
• receiving, by a calibration receiver, the calibration signal from the vector network analyzer;
• producing, by the calibration receiver, a digitized calibration temporal signal from the calibration signal;
• and
• receiving, by a signal processor, the reference digitized signal from the reference receiver;
• receiving, by the signal processor, the forward digitized signal from the forward coupled receiver;
• receiving, by the signal processor, the reverse digitized signal from the reverse coupled receiver;
• receiving, by the signal processor, the digitized calibration temporal signal from the calibration receiver;
• and
• producing, by the signal processor, a calibration factor from the reference digitized signal, the forward digitized signal, the reverse digitized signal, and the digitized calibration temporal signal to calibrate the cross-frequency phases of large-signal network analyzer measurements.