Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2022. №4
ContentsFull text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2022.4.1
ESTIMATION OF GEORADAR ERROR DUE TO NONLINEARITY
OF A VOLTAGE CONTROLLED CHIRP GENERATOR
A.I. Baskakov, A.A. Komarov, M.S. Mikhailov, K.Yu. Kozhevnikov
National Research University Moscow Power Engineering Institute
111250, Russia, Moscow, Krasnokazarmennaya, 14
The paper was received April 20, 2022.
Abstract. This paper shows the importance of such a parameter as the linearity of the modulation characteristic of the generator of the probing signal of linear-frequency modulation (LFM) of the georadar. The error in determining the depth of the desired underground object, arising due to the nonlinearity of this characteristic, may turn out to be unacceptably large. The paper considers a technique for calculating the error and gives an example of calculating the nonlinearity of the modulation characteristic and the maximum allowable frequency deviation from the linear law in the frequency tuning range of a voltage controlled oscillator (VCO).
Key words: georadar, search for underground waters, electrophysical characteristics of soil, voltage-controlled oscillator, non-linearity of the modulation characteristic, depth of the object.
Financing: the reported study was funded by RFBR and Ministry of Culture, Education, Science and Sports of Mongolia according to the research project № 19-57-44001.
Corresponding author: Komarov Alexey Alexandrovich, KomarovALA@mpei.ru
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For citation:
Baskakov A.I., Komarov A.A., Mikhailov M.S., Kozhevnikov K.Yu. Estimation of georadar error due to nonlinearity of a voltage controlled chirp generator. Zhurnal radioelektroniki [Journal of Radio Electronics] [online]. 2022. №4. https://doi.org/10.30898/1684-1719.2022.4.1 (In Russian)