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.
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V. F. Kroupa and J. Wiley, Direct Digital Frequency Synthesizers, IEEE Press, N. Y. (1998).
N. P. Yampurin, V. V. Boloznev, E. V. Sfronov, and E. V. Zhapnin, Generation of Precision Frequencies and Signals: Textbook, NGTU, Nizhnii Novgorod (2003).
A. V. Ryzhkov and V. N. Popov, Frequency Synthesizers in Radio Communications Equipment, Radio i Svyaz, Moscow (1991).
A. Chenakin, Frequency Synthsizers: From Concept to Product, Artech House, N.Y. (2010).
V. V. Romashov, L. V. Romashova, K. K. Khramov, et al., “Modeling noise characteristics of hybrid frequency synthesizers,” Radiotekh. Telekom. Sist., No. 1, 5–20 (2014).
V. V. Romashov, L. V. Romashova, K. K. Kramov, and K. A. Yakimenko, “The use of images of DDS in the hybrid frequency synthesizers,” Crimico-2014. 24th Int. Crimean Conf. Microwave and Telecommunication Technology. Conf. Proc., Sevastopol, Crimea (2014), pp. 302–303, DOI: https://doi.org/10.1109/CRIMIO.2014.6959404.
V. V. Romashov, L. V. Romashova, K. K. Khramov, K. A. Yakimenko, Patent 172814 RF, “Hybrid frequency synthesizer with improved spectral characteristics,” Izobr. Polesn. Modeli, No. 21 (2017).
Agilent Spectrum Analysis Basics. Application Note 150, Agilent Technologies, USA (2004).
S. A. Bel’chikov, “Phase noise: how to lower it below –120 dBc/Hz at 10 kHz offset in the frequency range up to 14 GHz, or the struggle for decibels,” Kompon. Tekhnol., No. 5, 139–146 (2009).
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Translated from Izmeritel’naya Tekhnika, No. 5, pp. 65–68, May, 2018.
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Romashov, V.V., Romashova, L.V., Khramov, K.K. et al. Reduction of the Phase Noise Level of Heterodynes of Modern Spectrum Analyzers Using Fundamental Frequency Images of Direct Digital Synthesizers. Meas Tech 61, 508–513 (2018). https://doi.org/10.1007/s11018-018-1459-5
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DOI: https://doi.org/10.1007/s11018-018-1459-5