Title :
Microwave Measurements Part II Non-linear Measurements
Author :
Camarchia, Vittorio ; Teppati, Valeria ; Corbellini, Simone ; Pirola, Marco
Author_Institution :
Politecnico di Torino, Turin
fDate :
6/1/2007 12:00:00 AM
Abstract :
This paper addresses the problems in microwave non-linear measurements. It discusses techniques to synthesize loads, the most used non-linear measurement techniques, and harmonic load-pulling. An experimental setup for characterizing power amplifiers must be able to measure the complex spectrum of the waves at the amplifier ports as a function of frequency, input power, and source and load termination at the fundamental and harmonic frequencies. The vector network analyzer (VNA) is the core instrument used in the non-linear characterization scenario. The basic idea is to keep the operations of VNA/mixers linear, diverting to them only a small portion of the signal present at the device under test (DUT) ports, therefore keeping unaltered the VNA capabilities already exhibited for small signal measurements.
Keywords :
microwave measurement; microwave power amplifiers; network analysers; spectral analysers; DUT port; VNA/mixers; device under test; harmonic load-pulling; load synthesis; microwave non linear measurements; power amplifier characterization; vector network analyzer; wave complex spectrum measurement; Calibration; DC motors; Distortion measurement; Frequency; Impedance; Microwave measurements; Multiaccess communication; Power measurement; Power system harmonics; Tuners;
Journal_Title :
Instrumentation & Measurement Magazine, IEEE
DOI :
10.1109/MIM.2007.4284255