Title :
Highly accurate harmonic tuners for load pull testing
Author :
Tsironis, Christos ; Jurenas, Algis ; Liu, Chris Wei
Author_Institution :
Focus Microwaves Inc., St. Laurent, Que., Canada
Abstract :
Highly reflective harmonic tuners with high resolution tuning accuracy between 0.2° and 0.7° over the whole 0-360° interpolated tuning range are presented. This can be obtained through precise alignment supported by calibration and nonlinear interpolation algorithms that allow reproduction of arbitrary impedances with accuracy typically exceeding -50dB, at the very edge of the Smith Chart. These tuners are used in a compact and accurate harmonic load pull system. This allows characterization of complex and strongly nonlinear behavior of microwave transistors, including: hot IV curves, saturation plots and load pull contours all under controlled conditions of the 2nd and 3rd harmonic impedances
Keywords :
automatic test equipment; calibration; circuit analysis computing; circuit testing; electric impedance; harmonic analysis; interpolation; microwave transistors; nonlinear network analysis; tuning; Smith Chart; calibration; harmonic impedances; harmonic load pull testing; hot IV curves; load pull contours; microwave transistors; nonlinear behavior; nonlinear interpolation algorithms; reflective harmonic tuners; resolution; saturation plots; tuning range; Calibration; Frequency; Impedance; Power amplifiers; Power system harmonics; Propagation losses; Reflection; Testing; Tuners; Tuning;
Conference_Titel :
Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific
Conference_Location :
Taipei
Print_ISBN :
0-7803-7138-0
DOI :
10.1109/APMC.2001.985376
