Title :
A study of the effect of envelope impedance on intermodulation asymmetry using a two-tone time domain measurement system
Author :
Williams, D.J. ; Leckey, J. ; Tasker, P.J.
Author_Institution :
Cardiff Sch. of Eng., Cardiff Univ., UK
Abstract :
An error corrected two-tone time domain measurement system has been developed and combined with a low frequency active source and load-pull system to investigate the effects of all impedance terminations, IF and RF, on the linearity and efficiency of power transistors. Measured data is presented on a HBT biased in class B stimulated by-a two-tone signal while actively load pulling the low frequency IF component.
Keywords :
electric impedance; heterojunction bipolar transistors; intermodulation; microwave measurement; power bipolar transistors; semiconductor device measurement; HBT; IF impedance termination; RF impedance termination; class-B operation; efficiency; envelope impedance; error correction; intermodulation asymmetry; linearity; load-pull system; low-frequency active source; power transistor; two-tone time domain measurement system; Calibration; Current measurement; Distortion measurement; Frequency measurement; Impedance; Linearity; Oscilloscopes; Power measurement; Time measurement; Voltage;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1012221
