Effect of out-of-band terminations on intermodulation distortion in common-emitter circuits

Effect of out-of-band terminations on intermodulation distortion in common-emitter circuits

This paper presents the results of Volterra series analysis of the third-order intermodulation distortion in common-emitter circuits. The derived closed-form expression shows how out-of-band source and load impedances affect the distortion. The expression was used to optimally tune the input matchin...

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Bibliographic Details
Published in:1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282) Vol. 3; pp. 977 - 980 vol.3
Main Authors: Aparin, V., Persico, C.
Format: Conference Proceeding Journal Article
Language:English
Published: IEEE 1999
Subjects:
Circuit optimization
Equivalent circuits
Impedance matching
Intermodulation distortion
Low-noise amplifiers
Phase modulation
Power amplifiers
Radiofrequency amplifiers
Transfer functions
Voltage
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Summary:This paper presents the results of Volterra series analysis of the third-order intermodulation distortion in common-emitter circuits. The derived closed-form expression shows how out-of-band source and load impedances affect the distortion. The expression was used to optimally tune the input matching network of a 2 GHz Si BJT LNA at the sub- and second-harmonic frequencies for a higher IIP/sub 3/. While the in-band noise figure, gain and input return loss were not affected, the peak IIP/sub 3/ increased by 14 dB.
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ISBN:0780351355
9780780351356
ISSN:0149-645X
DOI:10.1109/MWSYM.1999.779549