Computer programs, which are used to analyze harmonics in a power system, will calculate the voltage distortion for given harmonic sources and a network configuration.

In this paper, the large-singal analysis and small-signal analysis are made on an 8 mm 4th harmonic mixer. This harmonic mixer using a microstrip configuration is developed with GaAs diodes.

By the use of SA4828, the system has the merits of simple configuration and low feedback current harmonic, which give it a good application prospect.