Reduction of the Phase Noise Level of Heterodynes of Modern Spectrum Analyzers Using Fundamental Frequency Images of Direct Digital Synthesizers

V. V. Romashov; L. V. Romashova; K. K. Khramov; K. A. Yakimenko; A. N. Doktorov; R. V. Ovchinnikov

doi:10.1007/s11018-018-1459-5

Reduction of the Phase Noise Level of Heterodynes of Modern Spectrum Analyzers Using Fundamental Frequency Images of Direct Digital Synthesizers

Authors: Romashov V.V.¹, Romashova L.V.¹, Khramov K.K.¹, Yakimenko K.A.¹, Doktorov A.N.¹, Ovchinnikov R.V.¹
Affiliations:
1. Vladimir State University
Issue: Vol 61, No 5 (2018)
Pages: 508-513
Section: Article
URL: https://journals.rcsi.science/0543-1972/article/view/246496
DOI: https://doi.org/10.1007/s11018-018-1459-5
ID: 246496

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Abstract

A hybrid frequency synthesizer ins developed in which fundamental frequency images of a direct digital synthesizer are used to improve noise characteristics. It is shown that this synthesizer can generate a wide range of output frequencies with a small step size adjustment. Mathematical modeling of the noise characteristics of the synthesizer and comparison with the noise characteristics of heterodynes of modern spectrum analyzers are carried out.