Designing a Step-Recovery Diode-Based Comb Generator

The task of designing frequency multipliers and comb generators has traditionally been plagued by challenges such as low output power, unexpected parasitic frequencies, and oscillations. Computer-aided-design (CAD) software can overcome these problems, however. This article describes the use of NI AWR Design Environment, specifically Microwave Office circuit design software, to predict the behavior of a nonlinear step-recovery diode (SRD) in a harmonic-generator circuit. By doing so, designers can achieve a high correlation between simulation results and measured data.