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Metal-Dielectric Nanocomposite Structures with Definite Optical Selective Properties
Allerton Press - Tập 65 - Trang 587-596 - 2023
Yurii Yakymenko, Oleksandr Machulianskyi, Bohdan Babych, Viktor Hetmanchuk
In this paper there are represented spectral-selective elements with definite optical characteristics on a basis of metal-dielectric composite structures. There is shown the possibility of controlling of the spectral selectivity of such structures due to modification of structural parameters of nanodimension components and accounting of their electromagnetic properties. The results of electronic m...... hiện toàn bộ
The efficiency of detecting an object moving in the unknown direction with unknown intensities of its image and background
Allerton Press - - 2009
A. P. Trifonov, R. V. Kutsov, E. V. Peteshchenkov
The maximum likelihood algorithm for detecting a space-extended object moving in the unknown direction has been synthesized and analyzed under conditions of a priori uncertainty with respect to intensities of its image and applicative background. The impact of a priori unknown intensities of the object image and the background on the detection characteristics was also investigated.
Spaced radio receive as a queueing system with mixed priorities
Allerton Press - Tập 53 - Trang 52-55 - 2010
V. K. Marigodov
It is considered a possibility of simulation of spaced radio receive with queueing system (QS) with mixed priorities. There are defined main parameters of QS for three priorities classes and comparative analysis of their efficiency is represented.
Research of complex differential conductivity of multi-layer heterostructures
Allerton Press - Tập 54 - Trang 619-624 - 2011
Sh. K. Kaniyazov, A. S. Muratov
The paper deals with complex differential conductivity of multi-layer heterostructures, having N-type characteristics in case of field application along layers boundary. Frequency dependence of real and imaging parts of complex conductance is defined. Diode is characterized with capacity properties and greatQ-factor. It is possible to use these structures for generation of electrical oscillations.
Stripline bandpass filters with alternating coupling coefficients
Allerton Press - Tập 60 - Trang 173-180 - 2017
A. V. Zakharov, M. Ye. Ilchenko, L. S. Pinchuk, Oleksandr Lysenko
This article shows the possibility in principle to design stripline comb filters with alternating signs of the coupling coefficients. The new feature of the stepped-impedance resonators of the quarterwave type was established. They provide the opposite sings of the electromagnetic coupling with adjacent resonators. Such resonators are asymmetric relative to the vertical axes, which is drawn throug...... hiện toàn bộ
Stripline antenna array for local information-telecommunication radio networks
Allerton Press - Tập 52 - Trang 445-448 - 2009
F. F. Dubrovka, S. E. Martynyuk
There are represented results of theoretical and experimental researches of stripline antenna array for local information-telecommunication radio networks of IEEE 802.11b, g and IEEE 802.16 standards, which use radio frequency band 2.3...2.7 GHz. Antenna array consists of 4 (2×2) irradiators, which are excited with help of non-symmetric strip line with air fulfillment. Irradiators are two-resonato...... hiện toàn bộ
Analysis of Diode Mixers Using Nodal Voltage Method in Generalized Matrix Form in Frequency Domain. Part 1: Transfer Function
Allerton Press - Tập 65 - Trang 81-95 - 2022
Alexander S. Korotkov, Olga A. Golovan
This paper presents the method for analysis of diode frequency converters in the basis of nodal voltages employing the generalized matrix form in the frequency domain. Theoretical expressions for the transfer function of three (balanced, double-balanced and triple-balanced) circuits of diode frequency converters were obtained based on the specified method. Expressions for estimating the maximum at...... hiện toàn bộ
Inter-frame interpolation of the spectral envelope of the speech signal in the space of linear spectral frequencies of the highest regression
Allerton Press - Tập 51 - Trang 215-223 - 2008
O. I. Pavlov
Peculiarities of interpolating the parameters which encode the shape of the speech signal’s envelope in the space of linear spectral pairs on the example of the G.729 recommendation are considered. Results of experimental research of the interpolation processes of the similar parameters in the equivalent classical spaces are discussed. It is shown that carrying out the interpolation in the space o...... hiện toàn bộ
Beamforming algorithm for circular antenna array immune to multipath propagation and non-stationary interference sources
Allerton Press - Tập 54 - Trang 604-612 - 2011
Yu. B. Nechaev, D. N. Borisov, I. V. Peshkov
A circular antenna array beamforming algorithm with extended zeros based on using correlation function of antenna array, which should provide continuous uniform or Gaussian angular signal’s energy distribution along the given direction, is presented.
Performance of Full Rate Non-Orthogonal STBC in Spatially Correlated MIMO Systems
Allerton Press - Tập 63 - Trang 88-95 - 2020
Sagar B. Patel, Jaymin Bhalani, Y. N. Trivedi
Spatial correlation is a crucial impairment for practical Multiple Input Multiple Output (MIMO) wireless communication systems. It is important to consider spatial correlation between antennas in actual communication scenario at both sides, i.e. transmit and receive side. Furthermore, we have considered nonorthogonal full rate STBC in MIMO systems equipped with four transmit antennas and four rece...... hiện toàn bộ
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