Signals of Autodyne Sensors with Sinusoidal Frequency Modulation

Research results of signal formation features of the autodyne sensor (AS) with sinusoidal frequency modulation (FM) are presented. Expressions for low frequency information signals are given and their numerical analysis is performed for cases when signal period is substantially longer than reflected...

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Bibliographic Details
Published inRadioengineering Vol. 26; no. 4; pp. 1182 - 1190
Main Authors Noskov, V. Ya, Ignatkov, K. A., Chupahin, A. P., Vasilyev, A. S., Ermak, G. P., Smolskiy, S. M.
Format Journal Article
LanguageEnglish
Published Spolecnost pro radioelektronicke inzenyrstvi 01.12.2017
Subjects
Autodyne
autodyne sensor
autodyne signals
frequency modulation
Gunn-diode oscillator
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Summary:Research results of signal formation features of the autodyne sensor (AS) with sinusoidal frequency modulation (FM) are presented. Expressions for low frequency information signals are given and their numerical analysis is performed for cases when signal period is substantially longer than reflected radiation delay time as well as for the case when this inequality is not fulfilled. It is proved that at a small distance to the reflected object when feedback parameter value is commensurable with 1, the distortions of FM AS signals are typically caused by reflected radiation phase incursion irregularities. When distance grows the distortion level becomes significantly smaller due to delay phenomenon of reflected radiation. Experimental research results are obtained on the example of the autodyne oscillator based on the 8-mm wavelength range Gunn diode with varicap-based FM.
ISSN:1210-2512
DOI:10.13164/re.2017.1182