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Invertion ratio of the harmonics levels of the unmasking signal in the nonlinear radar

Authors: Vo Duy, Phuc; Zinchenko, M. V.; Zinkovskiy, Yu. F.;

Invertion ratio of the harmonics levels of the unmasking signal in the nonlinear radar

Abstract

Questions of identification of the mortgage devices (MD) on tunnel diodes which are in a waiting mode or work for record in memory of a chip, by means of nonlinear radars are considered. Conditions of change of a ratio on opposite between levels of spectral components of a scattered signal when sounding by the nonlinear radar of the considered class of mortgage devices are investigated. Inverse change of this ratio significantly worsens reliability of an identification sign of nonlinear scatterers based on the ratio of levels of multiple harmonics of a response signal. It is shown that a N-like form of the volt-ampere characteristic (VAC) of the nonlinear devices which are a part of the scatterer, amplitude of the induced signal and shift of a working point to VAC are the reasons of inversion in the ratio of levels of harmonics of the reradiated signal. Influence of a VAC form of the tunnel diode on reliability of identification of the MD introduction of the approximating dimensionless coefficients in the way and is analyzed. It is offered to use new variables not only for the characteristic of a curve form, but also for an assessment of reliability of MD identification based on the ratio of harmonics levels of the unmasking signal in general. The analysis of an identification sign of scatterers based on the ratio of levels of multiple harmonicas by means of parameters also allows to minimize influence of unreliable operating modes of nonlinear radars on efficiency of carrying out search actions.

Показано, что N-подобная форма вольт-амперной характеристики (ВАХ) нелинейных приборов, входящих в состав рассеивателя, является одной из причин инверсии в соотношении уровней гармоник переизлученного сигнала. Это приводит к снижению эффективности использования нелинейного радиолокатора при выявлении закладных устройств на туннельных диодах. При анализе последних предложено ввести аппроксимирующие безразмерные коэффициенты и , которые характеризуют не только форму ВАХ, но и достоверность идентификации закладных устройств по соотношению уровней гармоник демаскирующего сигнала в целом.

Показано, що N-подібна форма вольт-амперної характеристики (ВАХ) нелінійних приладів, що входять до складу розсіювача, є однією з причин інверсії в співвідношенні рівнів гармонік перевипромененого сигналу. Це призводить до зниження ефективності використання нелінійного радіолокатора при виявленні закладних пристроїв на тунельних діодах. При аналізі останніх запропоновано ввести апроксимуючі безрозмірні коефіцієнти та , які характеризують не лише форму ВАХ, але і достовірність ідентифікації закладних пристроїв по співвідношенню рівнів гармонік демаскуючого сигналу в цілому.

Keywords

621.37; 621.391, нелінійна радіолокація; достовірність ідентифікації закладних пристроїв; радіоелектронні пристрої на тунельних діодах, нелинейная радиолокация; достоверность идентификации закладных устройств; радиоэлектронные устройства на туннельных диодах, nonlinear radar; reliability of mortgage devices identification; radio-electronic devices on tunnel diodes

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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