Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
70
6
2011
RESONANT EXCITATION OF A 2D PERIODIC SCREEN PERFORATED BY CIRCULAR BELOW-CUTOFF HOLES
471-489
10.1615/TelecomRadEng.v70.i6.10
Andrei Olegovich
Perov
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
A. A.
Kirilenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy
of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
S. L.
Senkevich
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
partial domain method
two-dimensional periodic structures
resonance scattering
free oscillations
below-cutoff holes
Features of plane wave scattering by two-dimensional periodic perforated screen with a few sub-wavelength holes over the period are analyzed. It is shown that in contrast to single-element screens (with one hole over the period) such screens show dual properties. Specifically, operating in the single-wave regime they can support both the total transmission and/or total reflection resonances. The resonance behavior like this is explained within the spectral theory. It is shown that the spectrum structure of the complex-valued frequencies of the multi-element screen being considered as an open resonator is already built into the spectrum of a simple single-element screen if a model with macroperiod accommodating several identical cells is considered. Lower-order eigen oscillations of multi-element screens which appear due to various kinds of defects in the cell geometry are analyzed. A simple approximation model describing the dependence of the resonance response as a function of the eigenfrequency spectrum of lower-order modes is used to analyze possible types of the scattering characteristics within the single-wave range.
SENSITIZATION OF WAVEGUIDE MEASURING CUVETTE FOR BIOLOGICAL OBJECTS PERMITTIVITY INVESTIGATION
491-496
10.1615/TelecomRadEng.v70.i6.20
P. S.
Krasov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
complex reflection factor
FDTD method
high loss dielectrics
waveguide
measuring cuvette
The present work deals with electromagnetic simulation results the waveguide cuvette to improve its measuring characteristics by the FDTD method. Improvements have been achieved by optimizing the thickness size and shape of dielectric inserts. Both the module and phase sensitivity of the reflection factor have been increased in 1.5-2 times which have been experimentally confirmed.
SYNTHESIS OF REACTIVE MATCHING AND FILTERING DEVICES FOR AMPLITUDE DEMODULATORS WITH SPECIFIED TRANSMISSION RATIO MODULES IN TWO STATES
497-507
10.1615/TelecomRadEng.v70.i6.30
V. A.
Golovkov
Aviation Engineers University, Voronezh, Russian Federation(Military Institute of Radioelectronics), Voronezh, Russian Federation
I. I.
Fedyunin
Voronezh Higher Military Aviation Engineers School (Military Institute of Radioelectronics), Voronezh, Russian Federation
amplitude-modulated signal
matching and filtering device
amplitude demodulator
nonlinear element
reactive element
transmission matrix
The problem of parametrical synthesis of matching and filtering devices for amplitude demodulators, built on reactive elements, by the criterion of ensuring the specified transmission ratio modules in two states, defined by two extreme values of the input amplitude-modulated signal for any of its original modulation depth, has been solved.
SYNTHESIS OF REACTIVE MATCHING AND FILTERING DEVICES FOR PHASE DEMODULATORS WITH SPECIFIED TRANSMISSION RATIO MODULES IN TWO STATES
509-520
10.1615/TelecomRadEng.v70.i6.40
V. A.
Golovkov
Aviation Engineers University, Voronezh, Russian Federation(Military Institute of Radioelectronics), Voronezh, Russian Federation
I. I.
Fedyunin
Voronezh Higher Military Aviation Engineers School (Military Institute of Radioelectronics), Voronezh, Russian Federation
phase-modulated signal
modulator
matching and filtering device
reactive element
demodulator
signal source
The problem of parametrical synthesis of matching and filtering devices (MFDs) for phase demodulators, built on reactive elements, by the criterion of ensuring the operation of a phase-modulated signal (PMS) conversion to an amplitude-and-phase-modulated signal (APMS) with specified amplitudes in two states of its two-pole controlled element, defined by two extreme values of the PMS frequency, has been solved. The work is a sequel of (Golovkov and Fedyunin, 2008).
PARAMETERS OPTIMIZATION OF A LOW-ORBIT SMALL SATELLITES BATCHING USING THE RANGE-DIFFERENCE METHOD IN ORDER TO ESTIMATE RADIO SOURCES COORDINATES
521-533
10.1615/TelecomRadEng.v70.i6.50
Mikhail V.
Mironov
Tomsk State University of Control Systems and Radioelectronics (TUSUR)
V. A.
Gromov
Tomsk State University of Control Systems and Radioelectronics (TUSUR)
E. P.
Voroshilin
Tomsk State University of Control Systems and Radioelectronics (TUSUR)
G. S.
Sharygin
Tomsk State University of Control Systems and Radioelectronics (TUSUR)
radiation source
time of arrival estimation
range-difference method
coordinates estimation accuracy
space passive radiomonitoring system
There is proposed an iterative algorithm for radio sources coordinates estimation utilizing the range-difference method using the multiposition passive satellite system. There was investigated algorithm of the signal delay time estimation. There was carried out the statistical simulation of the delay time algorithm and the coordinates estimation algorithm. There was found the time of arrival estimation accuracy needed to solve the problem of coordinates estimation. There were defined the requirements to the satellite orbit altitude and to the spacing between the satellites for the small satellites constellation.
SYNTHESIS OF RESISTIVE MATCHING DEVICES OF PHASE DEMODULATORS WITH THE SPECIFIC MODULATION DEPTH OF THE AMPLITUDE-AND-PHASE-MODULATED SIGNAL, USING A THREE-POLE NONLINEAR ELEMENT: The Nonlinear Element Included between the Matching Device and the High-Frequency Load
535-546
10.1615/TelecomRadEng.v70.i6.60
V. A.
Golovkov
Aviation Engineers University, Voronezh, Russian Federation(Military Institute of Radioelectronics), Voronezh, Russian Federation
V. I.
Gaidukov
Voronezh Higher Military Aviation Engineers School, Voronezh
resistive matching device
phase-modulated signal
phase demodulator
high-frequency load
low-frequency filter
emitter
collector
parametrical synthesis
A problem of parametrical synthesis of resistive matching devices (MDs) of phase demodulators by the criterion of ensuring the conversion of a phase-modulated signal to an amplitude-and-phase-modulated signal with the specific modulation depth, using a three-pole nonlinear element, is solved.
MONITORING THE FUNCTIONAL PROPERTIES OF HUMAN RED BLOOD CELLS BY MICROWAVE WAVEGUIDE SINGLE-FREQUENCY DIELECTROMETRY
547-552
10.1615/TelecomRadEng.v70.i6.70
Kateryna A.
Arkhypova
A.Ya. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine; Kharkiv City Clinical Hospital No 7, Department of Neurology 266 Saltivs'ke shosse , Kharkiv, 61176, Ukraine
microwave
waveguide
complex permittivity
human red blood cells
adrenergic activity
Waveguide single-frequency method has been used to measure the complex permittivity of human red blood cells in the high-frequency domain (γ-dispersion). The relationship between the dielectric and physiological characteristics of human blood is described. It was experimentally detected that changes in complex permittivity of blood caused by the action of endogenous epinephrine in vitro can serve as criterion for assessing the functional state of the human body in health and disease. It opens an opportunity of using this method in the biomedical field for diagnostic purposes.
NOISE DETECTION CONDITIONS FOR BLOOD FLOW AT EXTERNAL ELECTRIC FIELD: MATHEMATICAL AND NUMERICAL MODELING
553-562
10.1615/TelecomRadEng.v70.i6.80
E.
Aznakayev
National Aviation University
V.
Kalion
National Aviation University
capillary blood flow
electric field
mathematical modeling
red blood cell
pressure
shear stress tension
noise detection
Mathematical modeling of electric field effect, double layer and small surface electric potential (less than 25 mV) of the red blood cell membrane and capillary wall phenomena are given in the paper. The capillary blood flow, pressure and shear stress tension as conditions of noise detection are examined.