Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
72
16
2013
EIGENMODES AND RESONANCE PROPERTIES OF ONE-DIMENSIONALLY PERIODIC METALLIC BAR GRATINGS. PART 2: COMPOUND GRATING
1453-1468
10.1615/TelecomRadEng.v72.i16.10
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
one-dimensionally periodic structures
compound grating
resonance scattering
natural oscillations
The interest shown today toward resonance properties of perforated metal gratings has been renewed owing to the investigation, interpretation and possible practical application of the effect known as the "enhanced transmission phenomena". Based on the works of the
V. Shestopalov school, the present paper is aimed at analyzing properties of one-dimensionally periodic gratings, i.e., at investigating eigenmode spectra and principles of their formation which are determined in particular by the structure of the grating period, and then at analyzing the influence of these spectra on the resonance characteristics. The effects arising in the case of scattering of an H-polarized plane wave by a one-dimensionally periodic compound metallic bar grating are considered in the study. The lower-order eigenoscillations of the multielement structures of the kind which are responsible for the resonance behavior in the case
of introduction of various regular faults in the geometry of the microperiodic cell are investigated. The relation between the scattering characteristic features and spectra of the compound gratings with various structures of the period is established. Based on these results, an estimate is presented for the number of resonances in dependence on the grating topology and geometry, and a novel interpretation is suggested for the "phase" resonances. The
resonance behavior of the grating is described in terms of the unified spectral theory, which makes it possible not only to establish the interrelation between different resonance effects but also to determine the source of such a behavior conditioned by excitation of certain eigenmodes.
TRANSIENT RESPONSE OF CIRCULAR WAVEGUIDE MODE TO THE CHANGE OF PERMITTIVITY IN THE CORE
1469-1480
10.1615/TelecomRadEng.v72.i16.20
N. K.
Sakhnenko
Kharkiv National University of Radio Engineering and Electronics, 14 Nauka Ave,
Kharkiv, 61166, Ukraine
dielectric waveguide
time varying media
In this paper, the rigorous mathematical approach has been applied to investigate transformations of a guided mode of the circular waveguide due to an abrupt time change of the
refractive index of the core. By using an assumption of a sharp time change of the medium parameters the authors obtained an analytical solution in the Laplace transform tern. The inverse transform to the time domain was derived by virtue of the residues theorem and evaluation of integrals along branch cuts of the complex plane. Transient behavior of the processes, steady state regime, possibility of the frequency shift and chance to transform the guided mode into leaky-wave modes have been studied in detail.
CALCULATION OF DIELECTRIC ELECTRONEGATIVE METAMATERIAL PROPERTIES IN A CIRCULAR MULTILAYERED DIELECTRIC WAVEGUIDE
1481-1486
10.1615/TelecomRadEng.v72.i16.30
M. E.
Kaliberda
V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61022,
Ukraine
Sergey A.
Pogarsky
V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61022, Ukraine
K.S.
Drozdov
V. Karazin National University of Kharkiv
multilayered composite dielectric
permittivity
circular waveguide
operator technique
The present paper discusses the application of a multilayered structure in which each layer is a dielectric insert within a circular waveguide. The system excitation is initiated by the TE11 mode. The analysis has been performed through the use of the operational method. The optimal dependence of relative dielectric permittivity of a single layer upon the frequency at which a dielectric with negative dielectric permittivity matches the multilayered structure is determined.
RADIO ACOUSTIC SOUNDING SYSTEMS: PART 3. PARAMETERS OF RECEIVED SIGNAL AT THE LOW SOUNDING PATH
1487-1496
10.1615/TelecomRadEng.v72.i16.40
A. Yu.
Panchenko
Kharkiv National University of Radio Electronics, 14, Nauky Avenue,
Kharkiv, 61166, Ukraine
radio acoustic sounding systems
diffraction problem
approximation
Bragg condition
Doppler frequency shift
received signal amplitude
systematic error
remote sensing
The present paper covers solving of a diffraction problem. The point is the electromagnetic wave diffraction by inhomogeneities of air permittivity while propagating acoustic wave packet in the lower section of sounding path by bistatic Radio Acoustic Sounding Systems with aperture
antennas. This work provides the approximation technique of the wave field distribution to bring a very cumbersome expression of the received signal to the more convenient form for numerical calculations. It takes into account the properties of directed wave beams. The physical factors of the electromagnetic-acoustic field interaction are considered. It was created a numerical model, and an algorithm for calculating the intensity and the Doppler frequency shift of the received signal in a bistatic zone of the RASS has been described. Physical simulation results including available experimental data, model accuracy and the ways of its improvements have been analyzed.
FREQUENCY CONVERSION IN pn-i-pn STRUCTURES
1497-1508
10.1615/TelecomRadEng.v72.i16.50
K. A.
Lukin
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
P. P.
Maksymov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy
of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
Yu. A.
Shiyan
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
semiconductor
pn–i–pn structure
impact ionization
avalanchecascade amplification
frequency conversion
The process of frequency conversion of signals in Ge-, Si- and GaAs-based dc reverse biased pn–i–pn structures with abrupt avalanching p-n junctions are modeled within the driftdiffusion model of semiconductors. Non-linear, frequency and phase distortions of signals are
investigated. The frequency conversion mechanism is analyzed. The factors influencing the frequency conversion characteristics of pn–i–pn structures are considered. It is shown that the frequency conversion ratio is independent of the input signal frequency.
COHERENT POWER COMBINING IN AVALANCHE-OSCILLATOR DIODES
1509-1519
10.1615/TelecomRadEng.v72.i16.60
K. A.
Lukin
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
P. P.
Maksymov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy
of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
avalanche oscillator diodes
coherent power addition
electronic frequency transformation
The basic problem of modern semiconductor microelectronics is to increase the energy characteristics of oscillators and to increase the frequency range of their operation.
Traditionally the power gain of oscillators based on avalanche transit-time diodes, is achieved by addition of the power of several diodes connected into one and the same resonance circuit (power combining). In this research the energy characteristic improvement is reached in the
avalanche oscillator diodes operating in the mode of coherent self-oscillations. In this mode the self-oscillations of electron-and hole components of the useful power density occur at the same frequency that provides their coherent composition in the depleted layer of a Si p–n-junction. The calculation of parameters and simulation of avalanche oscillator diode operation in the mode of two-frequency coherent self-oscillations were carried out by the well-tried numerical simulation methods for solving equations of a drift-diffusion model of semiconductors.
The energy and spectral characteristics of avalanche oscillator diodes are calculated. The frequency, useful power and electronic efficiency as a function of impurity concentrations and reverse bias voltage are studied. Research results are of interest for the designer of high-power oscillators operating in the millimeter and submillimeter wave ranges.
AUTODYNE SIGNALS IN CASE OF RANDOM DELAY TIME OF THE REFLECTED RADIATION
1521-1536
10.1615/TelecomRadEng.v72.i16.70
V. Ya.
Noskov
Ural Federal University (UrFU), 19, Mira St., Ekaterinburg, 620002, Russia
K. A.
Ignatkov
Ural Federal University, 19 Mira St., Ekaterinburg, 620002, Russia
autodyne oscillator
autodyne characteristics
the Doppler delay
distortion parameter
Solution of the system of differential equations of the autodyne was obtained by quasistatic method for the general case of random delay time of the reflected radiation and rapid movement of the reflecting object on the example of the classical single-loop oscillator being under the influence of its intrinsic reflected radiation. The features of the autodyne response formation were considered with regard to such inherent parameters of the oscillator as a nonisochronism and a nonizodromism. The dependence of the waveforms of DC component and harmonic distortion coefficient from the distance and the direction of movement of the location object was established.
A 1-V SUPPLY VOLTAGE CONTROLLED OSCILLATOR FOR INTRAOCULAR PRESSURE MEASUREMENT
1537-1544
10.1615/TelecomRadEng.v72.i16.80
A. E.
Rendon-Nava
Polytechnic National Institute, D.F., Mexico; National Institute for Astrophysics, Optic & Electronics, Puebla, Mexico
Luis
Nino-de-Rivera
National Polytechnic Institute of Mexico (IPN), National Institute for Astrophysics, Optic & Electronics, Puebla, Mexico
J. A.
Diaz-Mendez
Polytechnic National Institute, D.F., Mexico; National Institute for Astrophysics, Optic & Electronics, Puebla, Mexico
low voltage oscillators
wireless system
medical implant
phase noise
varactor
linearity
A 1-V supply LC (Inductive-Capacitive) VCO (Voltage Controlled Oscillator) for intraocular pressure measurement is presented. The VCO is fabricated in standard 0.18−μ;m CMOS (Complementary Metal Oxide Semiconductor) technology and occupies an active area of
700×750 μ;m2. Two varactors from the 0.18−μ;m process are used to emulate a MEMS (Micro Electro-Mechanical System) capacitive membrane response (pressure sensor). A response with very good linearity was achieved within a tuning range of 6%, which fits the MEMS pressure sensor variation range. The phase noise was −85 dBc/Hz at a 600−KHz offset from the carrier frequency at 500 MHz. The power consumption was 10 mW from a 1-V power supply.