Analysis of HEMT harmonic generation using a vector nonlinear measurement system

Author

Leckey, J.G. ; Stewart, J.A.C. ; Patterson, A.D.

Author_Institution

Queen´s Univ., Belfast, UK

Volume

3

fYear

1996

fDate

17-21 June 1996

Firstpage

1739

Abstract

A study of HEMT harmonic generation was carried out using a Vector Nonlinear Measurement System to measure drain and gate waveforms. The cause of second and third harmonic nulls with increasing input power, and their direct relation to the output IV characteristics is shown. The effect of DC drain current variation with increasing input drive level is also explained. The results indicate the potential for exploiting harmonic nulling behaviour in circuit applications. Analysis of second harmonic dependency on quiescent operating point shows a doubling mode with intrinsic suppression of unwanted third harmonic.

Keywords

harmonic generation; high electron mobility transistors; microwave field effect transistors; microwave measurement; DC drain current; HEMT harmonic generation; IV characteristics; doubling mode; harmonic nulling; quiescent operating point; vector nonlinear measurement system; waveform; Calibration; Frequency conversion; HEMTs; Harmonic analysis; Microwave measurements; Power measurement; Power system harmonics; Pulse measurements; Radio frequency; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1996., IEEE MTT-S International

Conference_Location

San Francisco, CA, USA

ISSN

0149-645X

Print_ISBN

0-7803-3246-6

Type

conf

DOI

10.1109/MWSYM.1996.512278

Filename

512278