Title :
A novel methodology for fast harmonic-load control with a passive tuner and an active loop
Author :
Bonino, S. ; Teppati, V. ; Ferrero, A.
Author_Institution :
Electron. Dept., Politec. di Torino, Torino, Italy
Abstract :
In this paper we introduce a novel technique to overcome the drawbacks of passive tuners and active loops when characterizing very high power transistors and amplifiers. The methodology combines a passive tuner and an active loop, the former used to tune the fundamental output impedance of a device under test, the latter exploited to change the harmonic termination. Since the passive tuner changes also the harmonic load in an unpredictable way, we present for the first time a method to quickly find the correct settings for the active loop to achieve the desired harmonic load. This methodology, is simple to implement, relatively quick, and does not imply long system pre-calibration time when changing the characterization frequency.
Keywords :
power amplifiers; power transistors; active loop; harmonic-load control; passive tuner; power amplifier; power transistor; Calibration; Directional couplers; Frequency measurement; High power amplifiers; Impedance; Power system harmonics; Power transistors; Reflection; Testing; Tuners;
Conference_Titel :
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4244-6056-4
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2010.5517560