RF and IF mixer optimum matching impedances extracted by large-signal vectorial measurements
Alessandro Cidronali, Giovanni Loglio, Jeffrey A. Jargon, Catherine A. Remley, I. Magrini, Donald C. DeGroot, Dominique Schreurs, Kuldip Gupta, Gianfranco Manes
This paper introduces a new technique that allows us to measure the admittance conversion matrix of a two-port device, using a Nonlinear Vector Network Analyzer. This method is applied to extract the conversion matrix of a 0.2 micron pHEMT, driven by a 4.8 GHz pump signal, at different power levels, using an intermediate frequency of 600 MHz. The issue on data inconsistency due to phase randomization among different measurements is discussed and a proper pre-processing algorithm is proposed to fix the problem. The output of this work consists of a comprehensive experimental evaluation of up- and down-conversion maximum gain, stability, and optimal RF and IF impedances.
October 6-7, 2003
European Microwave Week 2003, 11th Gallium Arsenide Application Symposium