Analysis of noise and dynamical effects in zero-IF self-oscillating mixers

Zero-IF self-oscillating mixers (SOMs), based on injection locking, enable a compact direct frequency conversion and substantially mitigate the phase noise problem of heterodyne SOMs. Despite these advantages, their operation is complex and susceptible to exhibit a variety of dynamical effects. Here...

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Bibliographic Details
Published in2021 IEEE MTT-S International Microwave Symposium (IMS) pp. 180 - 183
Main Authors Ponton, M., Sancho, S., Herrera, A., Suarez, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 07.06.2021
Subjects
Baseband
envelope transient
Frequency modulation
Injection-locked oscillators
injection-locking
Microwave oscillators
Mixers
noise analysis
Phase noise
Transient analysis
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Summary:Zero-IF self-oscillating mixers (SOMs), based on injection locking, enable a compact direct frequency conversion and substantially mitigate the phase noise problem of heterodyne SOMs. Despite these advantages, their operation is complex and susceptible to exhibit a variety of dynamical effects. Here the need for an optimum selection of the operation point in the static injection-locked curve is demonstrated, as well as the inability of the oscillator to follow the variations of the input signal from a certain modulation frequency. Then a noise analysis of the downconverted signal is presented, based on a conversion-matrix formalism applied to a semi-analytical formulation.
ISSN:2576-7216
DOI:10.1109/IMS19712.2021.9574961