Noise analysis in numerical modeling of crossed fields microwave tubes

Mariusz Błażejewicz; Martyna Woźniak; Emil Szkop; Andrzej Różycki; Michał Rychlewski; Dariusz Baczewski; Dariusz Laskowski

doi:10.1117/12.2317550

19 April 2018 Noise analysis in numerical modeling of crossed fields microwave tubes

Mariusz Błażejewicz, Martyna Woźniak, Emil Szkop, Andrzej Różycki, Michał Rychlewski, Dariusz Baczewski , Dariusz Laskowski

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Proceedings Volume 10715, 2017 Radioelectronic Systems Conference; 107150A (2018) https://doi.org/10.1117/12.2317550
Event: Radioelectronics Systems Conference, 2017, Jachranka, Poland

Abstract

One of the most important parameters that characterize microwave tubes with crossed fields, both amplifiers (CFA), and generating tubes like magnetrons is the noise level. This type of tubes are characterized by relatively high noise levels, which is the main factor limiting their current use in radar transmitters. The main source of noise in microwave tubes of this type is the dispersion of the energy of electrons that are in phase with the spatial wave of the electromagnetic field propagating in the delay line (in case of an amplitron) or in the resonant structure (in case of a magnetron).The results of the research presented in the article concern the technique of determination of Signal to Noise Ratio (SNR) based on the analysis of results obtained during the numerical simulations of the effect of electric charge on a high frequency electromagnetic field. Signal to noise ratio was determined by analysing in-phase and quadrature data recorded in the high frequency simulation. In order to assess the accuracy of the method under investigation, the results from the noise analysis obtained from numerical calculations were compared with the results obtained from real tube measurements performed by a spectrum analyser. On the basis of the research, it appears that performing analysis of noise generated in the interaction area may be useful for preliminary evaluation of the tube at the design stage.

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Mariusz Błażejewicz, Martyna Woźniak, Emil Szkop, Andrzej Różycki, Michał Rychlewski, Dariusz Baczewski , and Dariusz Laskowski "Noise analysis in numerical modeling of crossed fields microwave tubes", Proc. SPIE 10715, 2017 Radioelectronic Systems Conference, 107150A (19 April 2018); https://doi.org/10.1117/12.2317550

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KEYWORDS

Signal to noise ratio

Microwave radiation

Numerical modeling

Signal generators

Analytical research

Electrons

Spectrum analysis

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