Begell House Inc.
Journal of Radio Electronics
JRE
1
2
2012
A TEST BENCH FOR MEASUREMENT OF THE ANTENNA CHARACTERISTICS WITH A COAXIAL LOCATION OF THE HEATING SOURCE
0
10.1615/JRadioElectr.v1.i2.10
A.A.
Ovodenko
St. Petersburg State University of Aerospace Instrument Engineering
V. N.
Krasyuk
St. Petersburg State University of Aerospace Instrument Engineering
A. R.
Bestugin
St. Petersburg State University of Aerospace Instrument Engineering
M. B.
Ryzhikov
St. Petersburg State University of Aerospace Instrument Engineering
antenna characteristics
measurement test bench
high-temperature heating
Features of the technical implementation of the measurement test bench for determination of onboard antenna radiation characteristics in conditions of high-temperature heating are discussed. The lateral position of the heat source leads to errors in estimation of antenna radio characteristics and thermal barrier coatings. Recommendations on technical implementation of the test bench up to specific temperatures, where the heat source and the measurement antenna are combined in the same housing, are given
CALCULATING THE PROPAGATION FACTOR OVER THE EARTH BY THE PARABOLIC EQUATION METHOD
0
10.1615/JRadioElectr.v1.i2.20
V. V.
Akhiyarov
N. E. Bauman Moscow State Technical University
radio wave propagation
parabolic equation
The solution of a parabolic equation for prediction of the field strength over the earth, allowing for the vertical atmosphere stratification and the geometry of terrain, is discussed. The numerical algorithm based on split-step Fourier transform is shown. Solutions for model diffraction problems, such as spherical earth and a wedge, are obtained. The results for real terrain profiles are presented
EFFECTIVE SPECTRAL MODULATION WITH MEMORY USED FOR GENERATION OF GNSS RANGING SIGNALS
0
10.1615/JRadioElectr.v1.i2.30
A.B.
Khachaturian
St. Petersburg State Electrical Engineering University
F. V.
Ignatiev
St. Petersburg State Electrical Engineering University
global navigation satellite system (GNSS)
continuous phase modulation (CPM)
partial response FM
ranging signal
Walsh series
Continuous phase FM with memory proves to be a powerful tool of enhancing GNSS signal spectral efficiency. It is demonstrated that such modulation can be reduced to an equivalent offset QPM with chip overlapping in each quadrature stream and subsequent envelope normalization. The combination product estimation is done. Spectral characteristics of memory CPM signal are presented
METAL NANOSTRUCTURES FOR IMPROVING THE EFFICIENCY OF FIBER-OPTICAL AMPLIFIERS WITH ERBIUM IONS FOR 1.54 MICRON WAVELENGTH
0
10.1615/JRadioElectr.v1.i2.40
G.A.
Denisenko
A. V. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow; D. V. Skobeltsin Research Institute of Nuclear Physics, M. V. Lomonosov Moscow State Universit
A. A.
Kurushin
Moscow Energy Institute, Moscow
rare earth ions; silver nanosized tips; luminescence enhancement; fiber-optical amplifier; surface plasmons; numerical modeling of optical systems
Well-ordered metal structures, i.e. arrays of nanosized tips on silver surface for studies of the luminescence enhancement of absorbed media with rare earth ions, are used. These arrays are prepared by metal evaporation on track membranes. Basic relations determining plasmon oscillation frequencies for tip electron systems, modeled by semi-spheroidal protrusions, are presented. The impact on these frequencies by the dipole-dipole interaction developed in the tips is analyzed. Parameters of silver nanosized tips for enhancing luminescence in media with erbium ions, widely used in fiber-optical amplifiers at the 1.54 micron wavelength, are determined. Experimental samples of nanosized tip structures for spectral luminescent measurements in media with europium ions are obtained and characterized. Frequency characteristics are modeled numerically for typical tip nanosized structures by the finite difference time-domain method (FDTD). The calculations results obtained by means of the SCT Microwave Studio are compared with experimental data
METHOD OF ELECTROMAGNETIC PULSE ULTRA WIDEBAND PROBING OF THE UNDERLYING MEDIUM
0
10.1615/JRadioElectr.v1.i2.50
V. B.
Boltintsev
CJSC NPF Geodizond
B. N.
Lyakhin
CJSC NPF Geodizond
K. P.
Bezrodnyi
OJSC NIP II Lenmetrogiprotrans
ultra wide band (UWB); drift step recovery diodes; Wiener ï¿½ Hopf equation (method); ground-penetrating radio locating
A method for subsurface EMP UWB probing, using different DSRD (drift step recovery diodes) generators for the emission of electromagnetic waves, is described. More depth of the signal propagation is based on the manifestation of the low-frequency dispersion of the dielectric constant of the medium, which is due to the presence of induced polarization with the dipole relaxation mechanism, describing the behavior of wet soil under the influence of a strong electromagnetic pulse field. The article describes methods for solving the inverse problem of the depth and a comparison of EMP UWB probing predictions ahead of tunnels with the results of direct tunneling
OPTIMIZATION OF OUTPUT PARAMETERS OF A POWERFUL MULTIBEAM MONOTRON WITH A FOUR-GAP CAVITY EXCITED BY IN-PHASE OSCILLATIONS
0
10.1615/JRadioElectr.v1.i2.60
N.A.
Akafieva
Yu. A. Gagarin Saratov State Technical University, Chair ï¿½Electronic Instruments and Devicesï¿½
A. Yu.
Miroshnichenko
Yu. A. Gagarin Saratov State Technical University, Chair Electronic Instruments and Devices
V. A.
Tsarev
Yu. A. Gagarin Saratov State Technical University, Chair Electronic Instruments and Devices
multi-gap cavity
microwave active oscillator
in-phase oscillation
multi-beam monotron
electron efficiency
Multiple numerical optimization calculations of parameters of a multi-beam monotron with a four-gap cavity, excited by in-phase oscillations, demonstrated the possibility of reaching, at 2450 MHz, high values of electron efficiency (about 60%) and a high output power (about 60 kW), with 1.5 voltage efficiency in the output gap
SIGNAL DETECTION IN A RADIATING NONLINEAR ELECTROMAGNETIC CRYSTAL
0
10.1615/JRadioElectr.v1.i2.70
S. E.
Bankov
V. A. Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow
electromagnetic crystal
nonlinear antenna array
signal detection
Single-frequency excitation of the structure by a planar wave incident from free space is investigated. A boundary electrodynamic problem for a field inside the electromagnetic crystal and a nonlinear problem for currents and voltages at nonlinear two-pole networks are solved jointly. The radiating elements are described approximately without consideration of their reciprocal coupling. The results of numerical and analytical study of the detection of a signal, produced by free space wave, are presented. The structure is optimized by the criterion of conversion loss minimum. It is shown that the radiating nonlinear electromagnetic crystal in the detection regime may have a high directivity, not related to its geometrical dimensions.
THE USE OF MICROSTRIP ANTENNAS IN CONDITIONS OF AERODYNAMIC HEATING
0
10.1615/JRadioElectr.v1.i2.80
A.A.
Ovodenko
St. Petersburg State University of Aerospace Instrument Engineering
V. N.
Krasyuk
St. Petersburg State University of Aerospace Instrument Engineering
A. R.
Bestugin
St. Petersburg State University of Aerospace Instrument Engineering
M. B.
Ryzhikov
St. Petersburg State University of Aerospace Instrument Engineering
microstrip antennas
hypersonic aircraft
loss at high temperature
heat-resistant dielectrics
refractory metals
The possibility of using microstrip antennas directly on the surface of hypersonic aircrafts is analyzed. Temperature increase effects on the antenna radio engineering parameters are presented. Combinations of materials that can be used to implement heat-resistant radiators with relatively small loss are analyzed