• Sergey Smolskiy
  • Maxim Generalov




The processes of useful signal formation in the short-range radar systems constructed on the heterodyne, homodyne and autodyne principles are considered. The mathematical fundamentals of the fulfilled analysis are described in brief. It is shown that the autodyne configuration is much more complicated for the examination compared to the heterodyne and homodyne configurations due to the necessity of taking into account its own re-reflected signal. To simplify the theoretical analysis, the examination of the autodyne effect is performed under an assumption of reflected signal smallness. The comparison results of the considered configurations, which show that the homodyne and autodyne signal processing in the usual Doppler short-range radar turns out similar, are given. However, the autodyne short-range radar configuration itself has its own specific peculiarities, which should be taken into consideration in practice. It is proved that in the autodyne configuration one can meet the accompanying frequency modulation of the probing oscillation. It appears even at the absence of the forced frequency modulation, which is widely used to improve the short-range radar noise immunity. It is found out that this accompanying frequency modulation at weak reflected signals does not affect noticeably on the autodyne converter operation. The main theoretical conclusions of this paper are in the good conformity with the published results.


Kogan I. M. Short-range radar technology. ─ Moscow: Soviet Radio, 1973. ─ 272 p. [in Russian].

Bogachev V. M., Lysenko V. G., Smolskiy S. M. Transistor oscillators and autodynes. ─ Moscow: MPEI Publisher,1993. – 344 p. [in Russian].

Komarov I. V., Smolskiy S. M. Fundamentals of short–range FM radar. ─ Artech House Publisher, Norwood, MA, USA, 2003. ─ 289 p.

Usanov D. A., Skripal Al. V., Skripal An. V. Physics of semiconductor radio frequency and optical autodynes. ─ Saratov: SSU Publisher, 2003. ─ 312 p. [in Russian].

Arsh E. I. Self-oscillation means and methods for measurements. ─ Moscow: Mashinostroenie Publisher, 1979. ─ 256 p. [in Russian].

FM low-range radar ─ vibration and pressure meter / I. V. Komarov, S. M. Smolskiy, A. I. Kumenko, V. I. Plescheev // Proceedings of 3rd International Symposium SIBCONVERS’99, Tomsk, Russia, May 18─20. ─ 1999. ─ Vol. 2. ─ P. 395─396.

Komarov I. V., Smolskiy S. M. FM low-range radar ─ from systems of weapon to precision distance meter // Ibid. ─ P. 392─ 394.

New technology for measurement and analysis in medical diagnostics using the non-linear dynamic models / V. A. Fedorov, S. M. Smolskiy, M. Yu. Driamin et al // Proceedings of International Conference “Achievements of Structural Mechanics”, Hong Kong. ─ 2000. ─ P. 22─23.

Noskov V. Ya., Smolskiy S. M. Modern hybridintegrated autodyne oscillators of microwave and millimeterwave ranges and their applications. Part 6. Investigations of radio-pulse autodynes // Achievements of Modern Radioelectronics. ─ 2009. ─ N. 6. ─ P. 3─51 [in Russian].

Promising millimeter autodyne FM radar systems with continuous wave for the problems of detection, measurement and control / S. D. Votoropin, S. M. Smolskiy, N. N. Savkov et al // Technology and Design in Electronic Apparatuses. ─ 2005. ─ N. 1. ─ P. 7─13 [in Russian].

Smolskiy S. M., Ostapenkov P. S. Digital signal processing in high-precision FM radar measuring instrument of extra-small displacement // Proceedings of International Radar Symposium IRS-2005, September 6─8, 2005. ─ German Institute of Navigation (DGON). ─ P. 58─61.

Fedorov V. A., Smolskiy S. M., Lobastov A. G. The radar-tracking measuring complex of millimeter range for medical researches // Proceedings of International Radar Symposium IRS-2005, September 6─8, 2005. ─ German Institute of Navigation (DGON). ─ P. 113─117.

The microwave sensor of small moving for the active control of vibrations and chaotic oscillations modes / V. A. Fedorov, S. M. Smolskiy, V. V. Shtykov et al // Proceedings of 7th International Conference on Vibrations ICOVP-2005, ISIC University, Istambul, Turkey, 2005. ─ P.193─202.

Votoropin S. D., Ostapenkov P. S., Smolskiy S. M. Special features of practical measurement of parameters of promising frequency-modulated short-range millimeter radar // Russian Physics Journal. ─ 2006. ─ Vol. 49, N. 9. ─ P. 99─103.

Noskov V. Ya., Smolskiy S. M. Operation principle and main problems of development of intra-pulse SRR systems // UHF Technology and Devices. ─ 2009. ─ N. 2. ─ P. 46─59 [in Russian].

Diffraction microwave and millimeter wave radio engineering devices: interaction physics and operation principles / V. F. Vziatyshev, Yu. I. Orekhov, S. M. Smolskiy et al // Proceedings of 18th International Conference “UHF Engineering and Telecommunication Technologies”, September 10─14, 2008, Sevastopol, Ukraine, 2008. ─ P. 475─481 [in


Noskov V. Ya., Smolskiy S. M. General relations for the autodyne effect analysis in single-frequency oscillators // Radiotekhnicheskie tetradi. ─ 2010. ─ N. 41. ─ P. 37─42 [in Russian].

Noskov V. Ya., Smolskiy S. M. Peculiarities of autodyne response in synchronized oscillators with amplitude modulations // Radiotekhnicheskie tetradi. ─ 2010. ─ N. 41. ─ P. 33─50 [in Russian].

Vziatyshev V. F., Orekhov Yu. I., Permyakov V. A., Smolskiy S.M. Diffractional radio engineering systems for short-range radar and diagnostics: Specific properties, wave phenomena, thesaurus // Proceedings of 4th All-Russia Conference “Radar Technologies and Radio Communications”, November 29 ─ December 3, 2010, Moscow, 2010. ─ P 123─127. [in Russian].