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Journal Nonlinear World №5 for 2014 г.
Article in number:
Compact autonomous subnanosecond pulse generator for UWB systems
Keywords: ultra wideband systems drift step recovery diode (DSRD) Silicone Carbide ultrashort pulse generator
Authors:
A.V. Afanasyev - Ph. D. (Eng.), Associate Professor, Saint-Petersburg Electrotechnical University «LETI»
B.V. Ivanov - Ph. D. (Eng.), Associate Professor, Saint-Petersburg Electrotechnical University «LETI». E-mail: bvivanov@yandex.ru
V.A. Ilyin - Ph. D. (Eng.), Associate Professor, Saint-Petersburg Electrotechnical University «LETI». E-mail: ilyicmid@gmail.ru
A.F. Kardo-Sysoev - Dr. Sc. (Phys.-Math.), Leading Research Scientist, Ioffe Physical-Technical Institute (St Petersburg). E-mail: alx@helen.ioffe.ru
V.I. Tihomirov - Engineer, Saint-Petersburg Electrotechnical University «LETI». E-mail: cmid@inbox.ru
A.A. Smirnov - Engineer, Research Institute «Vector» (Saint Petersburg). E-mail: gr4211@mail.ru
Abstract:
The results of development and characterization of the generator parameters of subnanosecond pulses with pulse switch on the basis of the developed silicon carbide drift step recovery diode with sharp reduction (DSRD`s) are presented. The designed generator allows forming on 50 ohm load pulses with amplitude of 820 V and duration at half-width of 800 ps. The maximum pulse repetition frequency is 1 MHz. Along with the formation of monopolar pulses the generator with a slight change in the electrical circuit (DSRD`s location on the contour of the pumping and load) is able to form bipolar pulses which parameters (amplitude of duration) depend on the DSRDs and loop pumping. It is shown that the use of 4H SiC DSRDs in UWB generator as the closing switch produces pulses with parameters better than using silicon DSRDs. The designed generator of ultrashort pulses has small dimensions and self-powered, allowing its application in ultra-wideband (UWB) communication systems, the near-UWB radar, when antenna systems in study, as well as impulse noise simulator.
Pages: 54-58
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