Results 81 to 90 of about 345 (128)

Microwave autodyne vibrosensor in aeroengine diagnostics

2014 European Frequency and Time Forum (EFTF), 2014
The sensor is designed for in-flight aeroengine turbine blade vibration monitoring. The sensor operation and construction are similar to liquid rocket engine flame parameters sensors, which were presented on 20'th European Frequency and Time Forum. Three dimensional (3D) electromagnetic (EM) field structure and its fluctuation depending on regular ...
Fanis Mirsaitov, Ekaterina Safonova, Victor Boloznev   +2 more
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Some Transient Aspects of the Autodyne

IEEE Transactions on Power Apparatus and Systems, 1973
This paper deals briefly with the stability and voltage response of the autodyne. A semi empirical equation is obtained for the output voltage response, and this is used to predetermine the starting current of a d.c. separately excited motor supplied by the autodyne, in a 'Ward Leonard' drive.
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Sensitivity of two-frequency autodyne detection

Coherent Laser Radar, 1995
Heterodyne detection of laser radar signals is much more sensitive than other non-coherent method. The theory and technology of heterodyne detection are being well developed. In 1985, R. J. Keyes proposed the autodyne detection in a transmission-reception coherent laser radar system with a single-frequency laser.[1] Furhter theoretical and experimenatl
Shang Tieliang, Bao Xiuzeng, Ye Yihuang, Zhou Chi, Pi Mingjia   +4 more
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A double-diode autodyne transceiver

Instruments and Experimental Techniques, 2015
The principle of operation and design of an 8-mm autodyne transceiver module, based on two mutually synchronized Gunn diode oscillators, and schemes of the signal detection unit in the Gunn-diode supply circuit are described. The oscillation frequency of the autodyne is stabilized by an additional high-Q resonator, connected to the working resonator ...
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Autodyne effect in multifrequency osciliators

Radiophysics and Quantum Electronics, 1993
The variations of the individual-oscillator amplitudes, generalized phase differences of the generated harmonics, and self-oscillation frequency of a multifrequency autodyne oscillator under the influence of reflected radiation for each of the generated harmonics are studied theoretically.
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Particularities of double-diode autodyne characteristics

2016 9th International Kharkiv Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW), 2016
Calculations of main characteristics of a two-diode autodyne subject to the influence of eigen reflected radiation are performed. It is used, at that, a mathematical model in the form of two mutually synchronized partial oscillators with a delayed mutual coupling between them. Particularities of behavior of amplitude and phase characteristic variations
V. Ya. Noskov, K. A. Ignatkov, A. P. Chupahin, G. P. Ermak   +3 more
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Mathematical model of double-diode autodyne

2016 9th International Kharkiv Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW), 2016
A mathematical model has been developed for a double-diode autodyne oscillator affected by the proper reradiation. The model represents two mutually-synchronized partial oscillators with time delayed coupling between them. It is possible for studying peculiarities of autodyne amplitude variations of the partial oscillators, autodyne variations of ...
V. Ya. Noskov, K. A. Ignatkov, A. P. Chupahin, G. P. Ermak, A. S. Vasyliev   +4 more
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A Microwave Autodyne Meter of Vibration Parameters

Instruments and Experimental Techniques, 2004
A microwave autodyne vibration meter based on a Gunn oscillator is described. The device consists of a remote sensor with a horn and a digital display unit. The oscillator head is a waveguide section with a channel cross section of 7.2 × 3.4 mm2. The active element is a 3A728B diode placed in the gap of a rod holder. For the plane metal reflector under
D. A. Usanov, Al. V. Skripal, An. V. Skripal, A. E. Postelga   +3 more
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Autodyne mini-radars of the millimeter range

2005 15th International Crimean Conference Microwave & Telecommunication Technology, 2005
In the given message results of autodyne structure of the MM transceiver with various kinds of modulation are submitted and devices for processing of the accepted signals are considered. The most preferable active element for autodyne radar are Gunn diodes surpassing other types of active elements under the basic power characteristics, and also under ...
S.D. Votoropin, V.Ya. Noskov
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Autodyne Detection With CO 2 Laser

SPIE Proceedings, 1989
A new coherent laser detection system, two-frequency autodyne detection system, is introduced. The merits of autodyne detection are reviewed, and several experimental results are given.
Pi Mingjia, Sun Dongsong, Fan Liming, Dai Yongjiang, Nan Jingda   +4 more
openaire   +1 more source