Noise characteristics of autodynes with frequency stabilization by means of an external high-Q cavity

Noskov, V. Ya.; Игнатков, К. А.

doi:10.1134/s1064226916090102

Cited by 21 publications

(6 citation statements)

References 2 publications

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“…Timing diagrams, as seen from Figure 7 , contain slow (Doppler) and fast components. The slow component in the ‘pure’ form shown in Figure 7 a,e is similar to the amplitude characteristic of AD without modulation [ 37 ]. From these graphs, it can be noted that at the beginning and at the end of each CAS, the autodyne response at the AD output from AM is presented only as a Doppler signal.…”

Section: Calculation and Analysis Of Autodyne Characteristics At Smentioning

confidence: 81%

Autodyne Sensor Signals with Amplitude-Frequency Modulation of Radiation

Noskov

Galeev

Bogatyrev

et al. 2020

Sensors

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A mathematical model of an autodyne oscillator with a combined amplitude-frequency modulation, which is under the influence of its own radiation reflected from the target, is developed. The main relations are obtained for analyzing the autodyne response of a single-circuit oscillator depending on the delay time of the radiation reflected from the target with an arbitrary law of simultaneous amplitude and frequency modulation. The characteristics of the amplitude selection of signals, as well as their temporal and spectral characteristics, are calculated for harmonic amplitude-frequency modulation. The features of signal formation are established for various values of the amplitude and frequency modulation parameters and the feedback parameter of the “oscillator—target” autoparametric system. The results of experimental studies, performed on a Tigel-0.8M hybrid-integrated Ka-band oscillator module with a Gann mesa-planar diode, confirmed the findings of the theoretical analysis.

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Section: Calculation and Analysis Of Autodyne Characteristics At Smentioning

confidence: 81%

Autodyne Sensor Signals with Amplitude-Frequency Modulation of Radiation

Noskov

Galeev

Bogatyrev

et al. 2020

Sensors

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“…The block-diagram of the experimental workbench is shown in Fig. 6 [26]. The examined AD is connected with the Doppler simulator DS by the waveguide path WL with the length of 12 m. The variable attenuator At and the directional coupler DC are also in this section.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the main way to reduce signal distortions is to reduce the autodyne frequency deviation of the used microwave oscillator. Various types of oscillators are studied on this way: multi-frequency [21], [22] and multi-element [23], [24] as well as stabilized by means of an additional highquality cavity [25], [26].…”

Section: Introductionmentioning

confidence: 99%

Frequency Deviation of Injection-Locked Microwave Autodynes

Noskov¹,

Игнатков²,

Shaidurov³

2019

RADIOENGINEERING

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This article presents the results of the autodyne (AD) frequency deviation research, which is simultaneously affected by its own reflected radiation and the external synchronization signal. The basic correlations are obtained for the injection-locked AD (ILAD) analysis in the case of a moving radar object. The amplitude-frequency characteristics are calculated for the transfer coefficient of the autodyne phase variations and the ILAD frequency deviation. The advantages of ILAD are shown compared to AD without synchronization. The theoretical research investigations are confirmed by experimental data obtained by the example of an oscillator made on the basis of the 8-mm Gunn diode.

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“…Resulting, general system modelling is based on the operation of each circuit element, has been emphasised, such as feedback analysis and specific modelling. These are impressive and causal methods for explaining the system response, such as different circuit structures producing different system responses 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 . For example, self-excited electrical oscillator cases have been based on Adler’s equation 2 3 4 5 6 7 or the Van der Pol equation 8 9 10 11 , therein being combined with perturbation methods, which depend upon many complementary factors, including the physical characteristics of the system and the system’s elements and boundary conditions 12 13 14 15 16 .…”

mentioning

confidence: 99%

“…In the short-range radar (SRR) circuit case, the Symbolical Abbreviated Equation (SAE) which based on perturbation method was playing an important role to analyse an oscillator which simultaneously generates the transmitted signal and modulates the transmitted and reflected signal, this self-oscillator is called autodyne 9 . This model was appropriatefor in-depth analysis of specific feature in system, such as the effect of the external impact with definite time delay 20 , the characteristics of noise in autodynes 21 .…”

mentioning

confidence: 99%

Homodyne detection of short-range Doppler radar using a forced oscillator model

Kittipute

Saratayon²,

Srisook

et al. 2017

Sci Rep

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This article presents the homodyne detection in a self-oscillation system, which represented by a short-range radar (SRR) circuit, that is analysed using a multi-time forced oscillator (MTFO) model. The MTFO model is based on a forced oscillation perspective with the signal and system theory, a second-order differential equation, and the multiple time variable technique. This model can also apply to analyse the homodyne phenomenon in a difference kind of the oscillation system under same method such as the self-oscillation system, and the natural oscillation system with external forced. In a free oscillation system, which forced by the external source is represented by a pendulum with an oscillating support experiment, and a modified Colpitts oscillator circuit in the UHF band with input as a Doppler signal is a representative of self-oscillation system. The MTFO model is verified with the experimental result, which well in line with the theoretical analysis.

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Noise characteristics of autodynes with frequency stabilization by means of an external high-Q cavity

Cited by 21 publications

References 2 publications

Autodyne Sensor Signals with Amplitude-Frequency Modulation of Radiation

Autodyne Sensor Signals with Amplitude-Frequency Modulation of Radiation

Frequency Deviation of Injection-Locked Microwave Autodynes

Homodyne detection of short-range Doppler radar using a forced oscillator model

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