NVNA Techniques for Pulsed RF Measurements

摘要

With the advent of nonlinear vector network analyzers (NVNA), new measurement techniques have become available for characterizing nonlinear radio-frequency (RF) devices and circuits. In particular, the accurate measurement of the response of nonlinear circuits to periodic modulated and pulsed nonlinear RF excitation is now possible. Furthermore, using advanced triggering and multiple recording techniques, 1) the implementation of a real-time (ultra fast) active loadpull, 2) the measurement of pulsed-RF, pulsed-bias signals with reduced desensitization, and 3) the measurement of phase-stable RF signals with very wide (gigahertz) modulation bandwidths have been demonstrated. These advanced measurement techniques are the subject of this article.