Determination of autodyne oscillator parameters by the beating method (Vladislav Ya. Noskov, Kirill A. Ignatkov, Sergey M. Smolskiy)

The research results of oscillator internal parameters influence the features of dynamic autodyne characteristics formation in the case of external oscillator signal influence are presented. The equivalent circuit with a single-circuit oscillating system is considered as a model of the autodyne oscillator. Abbreviated equations are obtained by an averaging method and then they are linearized for small disturbances in a vicinity of the steady-state mode. The obtained characteristics for the beating mode are compared with characteristics of autodynes for short-range radar technology. The essential differences in behavior of the oscillator with acting the external oscillator and the oscillator with acting the own reflected signal have been found. The physical sense of the frequency dispersion phenomenon for the autodyne frequency deviation in the vicinity of hypothetical “zero” beating is discovered. The research results of dynamic autodyne characteristics in the frequency conversion mode of signals modulated on amplitude or frequency are given. It is shown that to suppress the spurious harmonics of the beating frequency, it is
advisable to take additional measures for generated frequency stabilization in autodyne frequency converters, for instance, using the external feedback in the oscillator or using the external high-Q resonator. The adequacy of theoretical conclusions is confirmed by results of experimental investigations of the hybrid-integrated module of 8 mm-range made on the basis of the planar two-meza Gunn diode. Oscillator characteristics obtained by the beating method are compared with results of investiga-
tion fulfilled with the help of modulation characteristics. It is shown that errors in experimental determination of dynamic characteristics of autodyne oscillators caused by frequency limitations of a pin-diode typical for the modulation characteristic method can be eliminated. Problems of practical application of obtained results in real radar systems using autodyne oscillators are discussed.

Рік видання: 2012
Номер: 1
УДК: 621.373.122
С. 35—45. Іл. 7. табл. 0. Бібліогр.: 20 назв.

1. Rocket F. Proximity fuze // Electronics. ─ 1945. ─ N. 11. ─ P. 110─111.
2. Hunton R. D., Miller B. J. Generator-powered proximity fuze // Electronics. ─ 1945. ─ N. 12. ─ P. 98─103.
3. Page C. H., Astin A. V. Survey of proximity fuze development // American Journal of Physics. ─ 1947. ─ Vol. 15, N. 2. ─ P. 95─110.
4. Zakarlyuk N. M., Noskov V. Ya., Smolskiy S. M. Onboard autodyne velocity sensors for aeroballistic inspections // Proceedings of 20th International Crimean Conference “Microwave & Telecommunication Technology”, September 13─17, 2010. ─ Sevastopol: Weber. ─ 2010. ─ Vol. 2. ─ P. 1065─1068.
5. Komarov I. V., Smolskiy S. M. Fundamentals of shortrange FM radar // Norwood: Artech House, 2003. ─ 290 p.
6. Takayama Y. Doppler signal detection with negative resistance diode oscillators // IEEE Transactions on Microwave Theory and Techniques. ─ 1973. ─ Vol. 21, N. 2. ─ P. 89─94.
7. Votoropin S. D., Noskov V. Ya., Smolskiy S. M. Modern hybrid-integrated autodyne oscillators of microwave and millimeter ranges and their application. Part 2. Theoretical and experimental investigations // Advantages in modern radio electronic engineering. ─ 2007. ─ N. 7. ─ P. 3─33 [in Russian].
8. Resonance of relaxation oscillations in autodyne oscillators / Е. М. Gershenzon, V. М. Kalygina, B. I. Levit, B. N. Tumanov // Radiophysics and Quantum Electronics. – 1981. ─ Vol. 24, N. 8. ─ P. 1028─1034 [in Russian].
9. Nagano S., Akaiwa Y. Behavior of Gunn diode oscillator with a moving reflector as a self-excited mixer and a load variation detector // IEEE Transactions on Microwave Theory and Techniques. ─ 1971. ─ Vol. 19, N. 12. ─ P. 906─910.
10. Pantoja F. R., Calazans E. T. Theoretical and experimental studies of gain compression of millimeter-wave selfoscillating mixers // IEEE Transactions on Microwave Theory and Techniques. ─ 1985. ─ Vol. 33, N. 3. ─ P. 181─186.
11. Lazarus M. J., Novak S., Bullimore E. D. New millimeter-wave receivers using self-oscillating Gunn diode mixers // The Microwave Journal. ─ 1971. ─ N. 7. ─ P. 43─45.
12. Bogoliubov N. N., Mitropolsky Yu. A. Asymptotic methods in the theory of nonlinear oscillations. ─ Moscow: Nauka, 1974. ─ 504 p. [in Russian].
13. Kurokawa K. Injection locking of microwave solid-state oscillators // Proceedings of the IEEE. ─ 1973. ─ Vol. 61, N. 10. ─ P. 1386─1410.
14. Votoropin S. D., Noskov V. Ya. UHF autodyne signals for tracking the parameters of moving objects // Russian Physics Journal. ─ 2000. ─ Vol. 43, N. 7. ─ P.
15. Votoropin S. D., Zakarlyuk N. M., Noskov V. Ya., Smolskiy S. M. On principal impossibility of autosynchronization of an autodyne by radiation reflected from a
moving target // Russian Physics Journal. ─ 2007. ─ Vol. 50, N. 9. ─ P. 195─206.
16. New direction-of-motion Doppler detector / M. J. Lazarus, F. P. Pantoja, M. Somekh, at al. // Electronic Letters. ─ 1980. ─ Vol. 16, N. 25. ─ P. 953─954.
17. Minaev M. I. Low-frequency spectrum of autodyne frequency converter // Electronic Engineering. Series UHF Electronics. ─ 1989. ─ N. 7 (421). ─ P. 12─14 [in Russian].
18. Minaev M. I., Tsentsiper B. L. Research of the autodyne frequency mixer on Gunn diode with large dynamic range of the external signal power variation // Electronic Engineering. Series UHF Electronics. ─ 1987. ─ N. 4 (398). ─ P. 30─33 [in Russian].
19. Noskov V. Ya., Ignatkov K. A., Smolskiy S. M. Analysis of signals of stabilized autodynes // Telecommunication Sciences. ─ 2011. ─ Vol. 2, N. 1, January ─ June. ─ P. 5 ─ 16.
20. Votoropin S. D., Noskov V. Ya., Smolskiy S. M. Modern hybrid-integrated autodyne oscillators of microwave and millimeter ranges and their application. Part 1.
Technological achievements // Advantages in modern radio electronic engineering. ─ 2006. ─ N. 12. ─ P. 3─30 [in Russian].