Noninvasive waveform probing for nonlinear network analysis.

Microwave Journal, February, 1994 by Hwang, J.C.M.; Tkachencko, Y.A.; Wei, C.J.

Introduction

In spite of the rapid advancement of on-wafer linear network analysis, nonlinear network analysis is still in its infancy. A recent development|1~ involves using a microwave transition analyzer to measure both the magnitude and phase of harmonic signals. However, the technique is based on conventional 50 |ohms~ coplanar probes, which are unsuitable for internal-node probing. A new technique using a 500 |ohms~ module probe in conjunction with the transition analyzer has been developed. The high impedance probe causes little perturbation to typical microwave circuits. By probing the voltage waveforms at four different locations on the input and output coplanar lines inside a test fixture, the fundamental and harmonic S-parameters of the device under test...

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