Time-Domain Method for Measuring Nonlinear Effects of Active Microwave Devices

The conventional way to measure the nonlinear behavior of active microwave devices is by using a spectrum analyzer. However, due to lack of phase information, the real waveform of the distorted signal cannot be obtained in this way. On the other hand, using an oscilloscope to show the waveform is an old technique for low fkequency signals. Until recently, this technique was not suitable for microwave frequencies.