Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
76
3
2017
2-D PHOTONIC CRYSTALS: ELECTROMAGNETIC MODELS OF THE METHOD OF EXACT ABSORBING CONDITIONS
185-207
10.1615/TelecomRadEng.v76.i3.10
M.
Ney
Département Micro-Ondes, Lab-STICC/Telecom Bretagne, Technopole
Brest-Iroise, CS 83818, 29238 Brest Cedex 3, France
K. Yu.
Sirenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
Yuriy
Sirenko
IRE NAN Ukraine
H. O.
Sliusarenko
O.Ya. Usikov Institute for Radiophysics and Electronics National Academy
of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085,
Ukraine
N. P.
Yashina
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
photonic crystals
method of exact absorbing conditions
bandgaps and passbands of compact crystals
waveguide components
radiation effects
New rigorous approach to the analysis of 2-D photonic crystals is suggested in the paper. The approach is based on the method of exact absorbing conditions, which provides accurate and reliable numerical results valid for long-duration simulations and resonant waves scattering. Several problems have been solved, which demonstrate the effectiveness of the proposed approach and its potential for obtaining reliable results for theoretical and practical applications. New results were obtained concerning bandgaps and passbands of compact crystals, electromagnetic characteristics of resonant cavities and basic waveguide components in photonic crystals, energy accumulation in resonant cavities, and radiation effects caused by the backward waves in photonic crystals.
ELECTROMAGNETIC PULSE COMPRESSION IN SECTIONS OF HELICALLY COILED WAVEGUIDES
209-225
10.1615/TelecomRadEng.v76.i3.20
V. L.
Pazynin
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
M. V.
Maiboroda
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
frequency-modulated pulses
pulse compression
waveguide dispersion
The possibility of coiling the extended waveguide sections in order to minimize their physical dimension is analyzed. It is shown that the power and dispersion characteristics of such relatively compact waveguide structures are close to those of straight waveguide segments of identical lengths. Propagation of broadband pulses in coiled waveguide sections is modeled. Dynamics of pulse deformation is analyzed. The obtained results give grounds to state that application of coiled waveguide sections in passive systems of pulse compression is feasible. This opens new capabilities for the design and optimization of pulsed sources of centimeter and millimeter wavelength range (Ku-, K- and Ka-bands) that use the principle of electromagnetic pulse compression.
WIDEBAND QUASI-OPTICAL POLARIZATION PHASE SHIFTER OPERATING IN THE THz FREQUENCY RANGE
227-236
10.1615/TelecomRadEng.v76.i3.30
O.S.
Kosiak
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
V. I.
Bezborodov
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
P. K.
Nesterov
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
quasi-optics
THz frequency range
phase shifter
differential phase section
quasi-optics
birefringence
The phase shifter is one of the basic elements of radio measurements systems. The polarization phase shifters with half-wave differential phase section rotating in the field of circular polarized wave rotating between two quarter-wave sections are widely used in waveguide and quasi-optical microwave circuits. The widebandedness of such phase shifters is determined by the widebandedness of the differential phase sections. The broadband differential phase sections composed of several birefringent elements with the planes of anisotropy twisted with respect to each other are used to expand the operating frequency range. Theoretical and experimental studies show the efficiency of the use of the differential phase sections in the polarization phase shifters operating in the THz frequency range.
FAST IDENTIFICATION OF LIQUIDS USING PLANAR METAMATERIAL
237-243
10.1615/TelecomRadEng.v76.i3.40
S. Yu.
Polevoy
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
А. S.
Vakula
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine,12, Academician Proskura St., Kharkiv 61085, Ukraine; Kharkiv National University of Radio Electronics 14, Nauka Av, Kharkiv 61166, Ukraine
S. V.
Nedukh
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine; V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61077, Ukraine
S. I.
Tarapov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine; Kharkiv National University of Radio Electronics 14, Nauka Av, Kharkiv 61166, Ukraine; V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61077, Ukraine
metamaterial
photonic crystal
permittivity
microwaves
It has been found experimentally that the liquid in container placed into the resonance region at the interface of the two photonic crystals may have a pronounced impact on the parameters of resonance peak of transmission coefficient. It was shown that different liquids have a variety of character of the dependences of the inverse Q-factor and the resonance frequency of the resonance peak versus the distance from the interface of the photonic crystals to the container with liquid. This dependence leads to one-to-one identification of such liquid. The experimental dependences for various concentrations of ethyl alcohol in water, for various drinks and water of different temperatures have been measured and analyzed. Thus, the ability of express analysis of liquids in a container by using a metamaterial based on two planar photonic crystals has been demonstrated experimentally.
COORDINATE METHOD FOR ESTIMATION OF RADIAL VELOCITY IN SYSTEMS OF ACOUSTIC SOUNDING OF THE ATMOSPHERE
245-251
10.1615/TelecomRadEng.v76.i3.50
Valerii
Semenets
Kharkiv National University of Radio Electronics
V. I.
Leonidov
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
atmosphere acoustic sounding
coordinate method
turbulent motion of the atmosphere
echo signals
scattering of acoustic signals
Using the analysis of experimental data of the atmosphere acoustic sounding as an example, the possibility is shown to use the coordinate method in the atmosphere acoustic sounding systems for estimation of small values of the vertical velocity of the air mass movement.
COMPARISON OF LONG-TERM ANTARCTIC OBSERVATIONS OF THE SCHUMANN RESONANCE WITH COMPUTATIONS ON THE BASIS OF A TWO-COMPONENT OTD-DMM MODEL
253-268
10.1615/TelecomRadEng.v76.i3.60
E. I.
Yatsevich
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
A. P.
Nickolaenko
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
A. V.
Shvets
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
A. V.
Koloskov
Institute of Radio Astronomy, National Academy of Sciences of Ukraine 4, Mystetstv St., Kharkov, 61002, Ukraine
O. V.
Budanov
Institute of Radio Astronomy, National Academy of Sciences of Ukraine 4, Mystetstv St., Kharkov, 61002, Ukraine
Schumann resonance
thunderstorm activity
model of global thunderstorms
peak frequency
Continuous Schumann resonance (SR) observations open the wide possibilities for permanent monitoring of the lower ionosphere and global thunderstorm activity. The existing methods for monitoring the thunderstorms with the help of SR were developed in detail only for the point source models. However, such customary models describe the sources of radiation in a too simplistic manner. In this connection, the development of semi-empirical source models becomes important, in which the distribution of lightning intensity in global thunderstorms is picked from the data of satellite observations. The paper compares the long-term experimental SR data accumulated at the "Akademik Vernadsky" Ukrainian Antarctic station with the computation results obtained in the two-component OTD-DMM model. It is shown that in spite the detailed OTD distributions of the global lightning activity deduced from the optical observations from space, the model is only partially consistent with the experiment. On the daily time scale, the two-component OTD-DMM model correctly reflects position of the main maximum of the global thunderstorms and their intensity. However, position of individual sources is inexact, and it does not allow for adequate diurnal variations in the SR peak frequencies. The model rather closely describes seasonal and inter-annual variations of peak frequency of the horizontal magnetic components Hy. It is shown that the inter-annual variations of peak frequencies might be attributed to the change in the ionosphere height combined with the north−south drift of sources from year to year, while the long-term drift of the peak frequency is associated most probably with modification of the lower ionosphere during the solar cycle.
DEVELOPMENT OF A RAIN GAUGE WITH ENHANCED ACCURACY AND HIGH FAST- ACTION WITH NUMERICAL INDICATION OF RAIN RATE TIME DEPENDENCE
269-275
10.1615/TelecomRadEng.v76.i3.70
Yurii V.
Levadnyi
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
Yu.P.
Malyshenko
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
T.Ye.
Chistova
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
shuttle rain gauge
rain intensity
Heavy rains considerably attenuate radio signals transmitted by modern millimeter wave high-speed communication lines. Therefore, this interference in the form of fast and deep changes of rain rates demands further investigations. Industrially manufactured rain gauges are not suitable for these investigations because of their inertia and insufficient precision of measurements. In view of the foregoing a new modification of the tipping-bucket rain gauge is suggested and made in this paper. As the result the precision has slightly improved but the fast-action improved substantially − more than by ten times (up to a few seconds in heavy rains) − owing to considerable diminishing the cuvette size and weight and also due to configuration which removed drop adhesion on its surface. The inclusion of an inexpensive microcontroller into the gauge composition also increased its precision and provided for a better display of rain rate time dependence values on a built-in monitor and interface to a computer for recording.