Multitone characterization and design of FET resistive mixers based on combined active source-pull/load-pull techniques

Author

Le, Di-Luan ; Ghannouchi, Fadhel M.

Author_Institution

Farinon Div., Harris Corp., Dollard-des-Ormeaux, Que., Canada

Volume

46

Issue

9

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

1201

Lastpage

1208

Abstract

A dual six-port-based measurement setup was developed to synthesize five source and load impedances simultaneously. The setup can perform nonlinear measurements with multifrequency excitation. Active source-pull/load-pull measurements obtained for an NE-9001 transistor operated in a C-band field-effect transistor (FET) resistive mixer mode allow one to optimize the linearity of the mixer while maintaining a typical conversion loss of approximately 7 dB. Two-tone verification at 3.9000 and 3.9005 GHz showed that the level of in-band third-order intermodulation products could be reduced to -50 dBc, with a well-chosen output intermediate frequency (IF) load impedance and sufficient local oscillator (LO) power. The measured performance of the realized mixer is in good agreement with that predicted at the transistor characterization step of the design

Keywords

field effect transistor circuits; intermodulation; microwave measurement; microwave mixers; multiport networks; 3.9000 GHz; 3.9005 GHz; 7 dB; C-band; FET resistive mixer; IF load impedance; NE-9001 transistor; active load-pull measurement; active source-pull measurement; conversion loss; design; dual six-port measurement; in-band intermodulation; local oscillator; multifrequency excitation; multitone measurement; nonlinear measurement; source impedance; Design automation; Frequency; Impedance measurement; Instruments; Local oscillators; Microwave FETs; Mixers; Power measurement; Testing; Tuners;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.709457

Filename

709457