Error Corrected UHF Power Transistor Periodic Waveform Measurements

In the design of UHF and microwave solid state transmitters for cellular radio and other applications, one encounters difficulties because of the nonlinear power devices used. CAD packages for nonlinear design are available (SPICE etc.), but their usage is limited because of inaccurate nonlinear high frequency transistor models and the difficulties in determining their parameters including parasitics. In the optimization of for example transmitter efficiency one still has to rely largely on cut and try methods, inappropriate in monolithic circuits.