CDMA Load Pull Measurements with Harmonic Tuning and Harmonic Behavioral Modeling

A load pull system that has CDMA stimulus and response capability is presented. This novel system performs harmonic tuning using a single, solid-state, impedance tuner without a multiplexer or harmonic loops. In addition, it has a characterization approach that can fit a behavioral model of a measured parameter as a function of the fundamental and harmonic termination. It model is a general equation of device performance as a function of termination, with predictive abilities. This approach can also be used in conjunction with the harmonic tuning to separate the effects of higher order harmonic terminations not controlled in hardware. This paper presents the measurement system, behavioral modeling, harmonic tuning, and the integration of the two capabilities.