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  Subjects -> ELECTRONICS (Total: 138 journals)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 1)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 4)
Advances in Microelectronic Engineering     Open Access   (Followers: 1)
Advances in Power Electronics     Open Access   (Followers: 7)
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 50)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 7)
Annals of Telecommunications     Hybrid Journal   (Followers: 4)
APL : Organic Electronics and Photonics     Hybrid Journal   (Followers: 1)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 2)
Archives of Electrical Engineering     Open Access   (Followers: 8)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 8)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 14)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 11)
Biomedical Instrumentation & Technology     Full-text available via subscription   (Followers: 4)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 5)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access  
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 12)
China Communications     Full-text available via subscription   (Followers: 1)
Circuits and Systems     Open Access   (Followers: 7)
Consumer Electronics Times     Open Access   (Followers: 3)
Control Systems     Hybrid Journal   (Followers: 18)
Electronic Markets     Hybrid Journal   (Followers: 5)
Electronic Materials Letters     Hybrid Journal   (Followers: 2)
Electronics     Open Access   (Followers: 3)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 4)
Electronics Letters     Hybrid Journal   (Followers: 15)
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 14)
EURASIP Journal on Embedded Systems     Open Access   (Followers: 8)
Foundations and TrendsĀ® in Communications and Information Theory     Full-text available via subscription   (Followers: 5)
Foundations and TrendsĀ® in Signal Processing     Full-text available via subscription   (Followers: 4)
Frequenz     Full-text available via subscription   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 19)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IEEE Consumer Electronics Magazine     Full-text available via subscription   (Followers: 7)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 3)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 1)
IEEE Power Electronics Magazine     Full-text available via subscription  
IEEE Transactions on Audio, Speech, and Language Processing     Hybrid Journal   (Followers: 9)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 19)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 10)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 6)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 13)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 11)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 7)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 7)
IET Power Electronics     Hybrid Journal   (Followers: 7)
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 5)
IETE Journal of Education     Open Access   (Followers: 2)
IETE Journal of Research     Open Access   (Followers: 4)
IETE Technical Review     Open Access   (Followers: 1)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Informatik-Spektrum     Hybrid Journal  
Instabilities in Silicon Devices     Full-text available via subscription  
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 1)
International Journal of Advanced Electronics and Communication Systems     Open Access   (Followers: 3)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 1)
International Journal of Aerospace Innovations     Full-text available via subscription   (Followers: 10)
International Journal of Applied Electronics in Physics & Robotics     Open Access  
International Journal of Biomedical Nanoscience and Nanotechnology     Hybrid Journal   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 4)
International Journal of Computer & Electronics Research     Full-text available via subscription   (Followers: 2)
International Journal of Control     Hybrid Journal   (Followers: 9)
International Journal of Electronics     Hybrid Journal   (Followers: 2)
International Journal of Electronics & Data Communication     Open Access   (Followers: 3)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 3)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 1)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 1)
International Journal of Nano Devices, Sensors and Systems     Open Access   (Followers: 1)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling:Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 2)
International Journal of Power Electronics     Hybrid Journal   (Followers: 3)
International Journal of Power Management Electronics     Open Access  
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 1)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 2)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 2)
International Journal on Communication     Full-text available via subscription   (Followers: 7)
International Journal on Electrical and Power Engineering     Full-text available via subscription   (Followers: 11)
ISRN Electronics     Open Access   (Followers: 1)
ISRN Signal Processing     Open Access  
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 5)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 1)
Journal of Electrical Bioimpedance     Full-text available via subscription   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Full-text available via subscription   (Followers: 1)
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 2)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 1)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 1)
Journal of Electronics (China)     Hybrid Journal   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 3)
Journal of Guidance, Control, and Dynamics     Full-text available via subscription   (Followers: 49)
Journal of Intelligent Procedures in Electrical Technology     Open Access  
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 4)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 1)

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Journal Cover Radiophysics and Quantum Electronics
   [4 followers]  Follow    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
     ISSN (Print) 1573-9120 - ISSN (Online) 0033-8443
     Published by Springer-Verlag Homepage  [2209 journals]   [SJR: 0.274]   [H-I: 8]
  • Dynamic Behavior of an Isolated Repressilator with Feedback
    • Abstract: Dynamic behavior of the model describing the literature-known synthetic genetic oscillator (repressilator), which is constructed as a three-gene ring, is studied by the methods of numerical analysis of bifurcations. The protein products of each gene inhibit activity of the subsequent neighbor gene, which ensures the limit-cycle existence. One feedback caused by the production of the signal molecules activating expression of a ring gene is added to the repressilator ring. Such a system of four ordinary differential equations is shown to demonstrate diversified and unusual multistable behavior, i.e., coexistence of the stable limit cycle and stable stationary state. Homoclinic saddle–node bifurcations occur at the boundaries of parameter ranges where such a coexistence is observed. The number of homoclinic transitions increases with increasing cycle amplitude if the characteristic times of the protein and signal-molecule dynamics converge. In this case, the limit cycle undergoes forward and backward period-doubling bifurcations.
      PubDate: 2014-03-01
       
  • Some Features of Light Scattering in Optically Anisotropic Media
    • Abstract: Experimental results on observation of the light scattering in optically anisotropic transparent media are presented. During observation at angles close to the normal to the light beam in the crystal, a periodic trace line, which reflects the light-scattering dependence on the polarization of the laser light beam passing through the medium, is seen. Generalization of the well-known Umov experiment to more complex optically anisotropic media is presented. A simple theoretical model for a qualitative interpretation of the experimental data is proposed.
      PubDate: 2014-03-01
       
  • Bremsstrahlung of Waves Polarized Linearly Across a Strong Magnetic Field
           in Low-Energy Electron–Nucleus Collisions
    • Abstract: We analyze bremsstrahlung which accompanies the low-energy electron–nucleus collisions in a strong magnetic field under the condition that the electron Larmor radius is less than the characteristic impact parameter of close Coulomb collisions in the absence of the magnetic field. We calculate the spectral emissive power at frequencies below the electron cyclotron frequency, which is stipulated by the electric drift of the electron gyration axis in the Coulomb field of a nucleus and the external magnetic field. The electric drift produces the nonzero bremsstrahlung and collisional absorption of linearly polarized waves transverse to an external magnetic field. We show that in thermal equilibrium the absorption coefficient of the extraordinary waves in a rarefied plasma reaches a minimum at the corresponding frequency. The minimum can ensure that these waves exit from the deeper and hotter layers in the photosphere of an isolated magnetic white dwarf compared with the ordinary waves. This effect can stipulate the observed linear polarization of the star emission in the band below the electron cyclotron frequency.
      PubDate: 2014-03-01
       
  • Traveling-Wave Echelette Cavity
    • Abstract: We discuss the multi-mirror traveling-wave cavity, where one of the mirrors is a reflecting diffraction grating. The structure of its eigenfunctions is described, and its high selectivity is pointed out.
      PubDate: 2014-03-01
       
  • Amplitude-Dependent Internal Friction and Harmonic Generation in Media
           with Hysteresis Nonlinearity and Linear Dissipation
    • Abstract: Based on generalization and integration of models for dislocation mechanisms of the hysteresis nonlinearity, we propose a hysteresis equation of state of polycrystalline solids with saturated amplitude-dependent losses. Using the perturbation method, we study, both theoretically and numerically, the nonlinear effects during propagation of acoustic waves in the media with hysteresis nonlinearity and linear viscous dissipation. Nonlinear damping rate and propagation velocity of the wave at the fundamental frequency, as well as regularities for the amplitudes and phase velocities at its second and third harmonics, are determined. It is shown that the media described by such hysteresis equations of state have a nonlinear dispersion, which leads to a nonmonotonic rise and amplitude beats of the higher harmonics as the wave amplitude increases at the fundamental frequency.
      PubDate: 2014-03-01
       
  • Calculation of the Radiation Pattern of an Antenna Over a Semiconducting
           Plane by a Modified Method of Images
    • Abstract: We present an algorithm for finding the electromagnetic field produced by an antenna located near a semiconducting plane by the method of images. The results of calculating the radiation pattern of an X-shaped antenna system with four inclined beams, which is located in immediate proximity of the Earth’s surface, are presented.
      PubDate: 2014-03-01
       
  • Behavior of the Brightness Temperature of the Ocean–Atmosphere
           System Under Conditions of Midlatitude and Tropical Cyclone Activity
    • Abstract: We analyze the behavior of the ocean–atmosphere system characteristics based on direct (contact) and satellite microwave radiometric measurements. Some common and distinctive features of their dynamics in the mid-latitudes of the North Atlantic (in its Norwegian, Newfoundland, and Gulf Stream energy-active zones), which significanty affect the weather conditions in Europe, and in the tropical latitudes of the Atlantic (the Gulf of Mexico and the Bahamas area), which are the sources of tropical cyclogenesis, are considered.
      PubDate: 2014-03-01
       
  • The Discharge Maintained by High-Power Terahertz Radiation in a Nonuniform
           Gas Flow
    • Abstract: We have studied experimentally the discharge that occurs in a nonuniform gas flow in quasioptical electromagnetic radiation of the terahertz frequency range (the radiation power was equal to 100 kW, the frequency, to 0.67 THz, and the pulse duration, to 20 μs. The flow was formed by gas injection through a small-diameter aperture to the vacuum chamber under a background pressure of up to 10−3 Torr. The structure of the discharge in the range of background pressures from 10−3 to 102 Torr has been studied and the possibility to produce a discharge with characteristic plasma dimensions less than 1 mm has been demonstrated. The dynamics of the discharge luminescence in the optical range has been studied for various values of the background pressure and gas injection rate.
      PubDate: 2014-01-01
       
  • Submillimeter Quasioptical Spectroscopy of Multilayer Conducting and
           Superconducting Systems
    • Abstract: We demonstrate the efficiency of using interference effects in multilayer structures for a quantitative determination of submillimeter (submm) electrodynamic characteristics of materials using quasioptical spectroscopy based on backward-wave oscillators (BWOs). We present the results of studying fundamental physical properties of the conducting and superconducting objects of several types. Strong absorption in iron-based superconductors at “sub-gap” frequencies has been detected. In the temperature behavior of submm conductivity in LaNiO3/LaAlO3 heterostructures we found a metal–insulator phase transition that is observed in the case of thin (two-unit-cell) LaNiO3 layers and is absent in the case of thicker (four-unit-cell) LaNiO3 layers. In Ge/Si heterostructures with Ge quantum dots (QDs) we discovered the submm conductivity that is strongly enhanced compared with the conductivity of the structures containing the same amount of germanium, but not organized into a QD array.
      PubDate: 2014-01-01
       
  • Experimental Study of the Pulsed Terahertz Gyrotron with Record-Breaking
           Power and Efficiency Parameters
    • Abstract: We describe the results of studying experimentally a high-power (hundreds of kilowatts) pulsed (pulse duration of about 30 μs) subterahertz gyrotron with the generation frequency corresponding to one of the atmosphere transparency windows. The gyrotron with an operating frequency of 0.67 THz, a power of more than 200 kW and an efficiency of 20–25% was used in the experiments on ignition of a localized discharge in a plasma. The paper presents the data about measurements of the temperature field of the emitter, calorimetric measurements of the power and efficiency of the gyrotron, and the design of the quasioptical converter of radiation to a narrow wave beam. The first experiments with the terahertz discharge in a focused wave beam of the gyrotron are briefly described.
      PubDate: 2014-01-01
       
  • New Versions of Terahertz Radiation Sources for Dynamic Nuclear
           Polarization in Nuclear Magnetic Resonance Spectroscopy
    • Abstract: Dynamic nuclear polarization in strong-field nuclear magnetic resonance (NMR) spectroscopy requires terahertz radiation with moderate power levels. Nowadays, conventional gyrotrons are used almost exclusively to generate such radiation. In this review paper, we consider alternative variants of electronic microwave oscillators which require much weaker magnetic fields for their operation, namely, large-orbit gyrotrons operated at high cyclotron-frequency harmonics and Čerenkov-type devices, such as a backward-wave oscillator and a klystron frequency multiplier with tubular electron beams. Additionally, we consider the possibility to use the magnetic field created directly by the solenoid of an NMR spectrometer for operation of both the gyrotron and the backward-wave oscillator. Location of the oscillator in the spectrometer magnet makes it superfluous to use an additional superconducting magnet creating a strong field, significantly reduces the length of the radiation transmission line, and, in the case of Čerenkov-type devices, allows one to increase considerably the output-signal power. According to our calculations, all the electronic devices considered are capable of ensuring the power required for dynamic nuclear polarization (10 W or more) at a frequency of 260 GHz, whereas the gyrotrons, including their versions proposed in this paper, remain a single option at higher frequencies.
      PubDate: 2014-01-01
       
  • Hot-Electron Bolometer Mixers With in Situ Contacts
    • Abstract: We report on the latest achievements in the development of superconducting hot-electron bolometer (HEB) mixers for terahertz superheterodyne receivers. We consider application ranges of such receivers and requirements for the basic characteristics of the mixers. Main features of the mixers, such as noise temperature, gain bandwidth, noise bandwidth, and required local-oscillator power, have been improved significantly over the past few years due to intense research work, both in terms of the element fabrication quality and in terms of understanding of the physics of the processes occurring in the HEB mixers. Contacts between the superconducting bridge and the planar antenna play a key role in the mixer operation. Improvement of the quality of the contacts leads simultaneously to a decrease in the noise temperature and an increase in the gain bandwidth of a mixer.
      PubDate: 2014-01-01
       
  • Precision Sub-Doppler Millimeter and Submillimeter Lamb-Dip Spectrometer
    • Abstract: We describe a precision sub-Doppler millimeter and submillimeter-wave Lamb-dip spectrometer with a backward-wave oscillator as the radiation source. The effect of nonlinear saturation of the spectral transitions (the Lamb-dip method) is used. The spectrometer resolution (about 5–10 kHz) and the measurement accuracy of the absolute frequencies (of the order of 1 kHz) of molecular transitions in the frequency range below 0.5 THz are discussed. The spectrometer is designed for obtaining accurate radio-astronomy and molecular-spectroscopy experimental data, in particular, when seeking variation in the proton-to-electron mass ratio as a function of time and place in the Universe. The frequency records of the Lamb dips on the spectral lines of the CO, OCS, and H2O molecules, the results of measuring the center frequencies of some transitions, and comparison with the results of other works are presented. The high measurement accuracy allows us to use the molecular-transition frequencies as the secondary frequency standards.
      PubDate: 2014-01-01
       
  • Studying Characteristics of the Slow-Wave System of the Traveling-Wave
           Tube with a Sheet Electron Beam
    • Abstract: We propose a method for calculation of a periodic slow-wave system designed as a double comb immersed into a rectangular waveguide. The approach is based on solving a system of integral equations obtained by the method of field matching in different regions. The system of integral equations is reduced to an algebraic system of linear homogeneous equations using Galerkin’s method with allowance for the singular behavior of the field on the edges of the comb pins. The results of calculating characteristics of the slow-wave system of the millimeter-wave traveling-wave tube with a sheet electron beam are presented.
      PubDate: 2014-01-01
       
  • Recording of Terahertz Pulses of Microsecond Duration Using the
           Thermoacoustic Effect
    • Abstract: We consider the possibility of using a thermoacoustic detector (TAD) for recording of high-power pulse radiation at frequencies of 0.55, 0.68, and 0.87 THz. Electromagnetic wave is transformed into an acoustic wave in a structure consisting of a 10-nm thick chromium film deposited on a quartz substrate and a layer of the immersion liquid that is in contact with the film. It is shown that for the pulse of microsecond duration (3–10 μs) the waveform detected by the thermoacoustic detector is matched with high accuracy to the derivative of the terahertz pulse profile. For recording of electromagnetic radiation in the 0.5–0.9 THz frequency range it is possible to employ the simplified design of TAD, in which a transparent quartz substrate is in contact with a layer of water or ethanol.
      PubDate: 2014-01-01
       
  • Laser Ceramics Sintering by Millimeter-Wave Heating
    • Abstract: Prospects for using microwave radiation to sinter optically transparent ceramics are stipulated by the absence of the heaters and screens contaminating the sintered material and the presence of the inverse temperature distribution in the product, which allows one to fabricate maximum-density ceramics. In this work, we present the results of studying the process of producing optically transparent Yb:YAG and Yb:(LaY)2O3 ceramics when the samples are sintered in the chamber of a gyrotron complex operated at a frequency of 24 GHz. The various-composition samples were manufactured by compaction of a mixture of commercially available powders (Yb:YAG ceramics) and the powders prepared by the self-propagating high-temperature synthesis (Yb:(LaY)2O3 ceramics). The sintering temperatures were varied in the interval 1700–1900°C, the sintering time was varied from 2 to 20 h, and the residual-air pressure in the working chamber was 10 Pa. Lasing was obtained for the samples of both compositions.
      PubDate: 2014-01-01
       
  • Experimental Investigation of the Relativistic Millimeter-Wave
           Gyroklystron
    • Abstract: We present the results of experimental studies of the gyroklystron with cavities operated with the sequence of TE7.1.1—TE 7.3.1 volume modes and a radiation frequency of 35.4 GHz. At an accelerating voltage of 320 kV, we obtained an output radiation power of 15 MW for an efficiency over 30%, an amplification coefficient of 30 dB, an amplification band of 50 MHz, and a microwave pulse duration of 0.5 μs.
      PubDate: 2014-01-01
       
  • On the Impact of Interaction Between the Matrix Elements in the 3-mm Wave
           Active Radiovision System on the Object Image Structure
    • Abstract: We consider the results of experimental study and electromagnetic simulation of the radiation pattern of antenna elements of a 2D matrix in the 3-mm wave radiovision system operated in active mode. An image in the plane of a 8 × 8 element (36 × 36 mm) matrix is formed by highlighting the scene using a coherent source of radio waves and projecting it with an aspheric lens of 100 mm in diameter. The matrix elements are printed antennas based on the microstrip slots loaded by detectors with planar Mott diodes. The matrix signals are amplified by operational amplifiers and are processed by a digital system that is able to visualize the data on a PC display. Estimates of the level of interaction between the antenna elements constituting the matrix obtained by electromagnetic simulation as well as by measuring the radiation pattern are presented. It is shown that although the interaction of the matrix elements slightly distorts the intensity of the analyzed uniform electromagnetic field in the lower part of the dynamic range, and therefore reduces the image contrast and the sensitivity of the reception matrix, a conclusion on good prospects for the 2D matrix development can be made.
      PubDate: 2014-01-01
       
  • Cryogenic Resonator Complex
    • Abstract: We describe a unique new-generation laboratory facility for studying dielectric parameters of gases and condensed media, as well as reflectivity of surfaces (reflection loss) in the frequency range 100–500 GHz and pressure interval from 10−3 Torr to the atmospheric pressure at temperatures of 4 to 370 K. The Fabry–Perot resonators with Q-factors of about 106, in which the studied gas, dielectric, or reflector are located, are the measuring elements of the facility. The backward-wave oscillator stabilized by the wideband phased-lock loop is the radiation source. Using this facility, we were able, in particular, to confirm the presence of water dimers in the atmosphere and study some materials for the reflectors of the “Millimetron” space observatory.
      PubDate: 2014-01-01
       
  • Spectral Properties of a Terahertz Oscillator Based on the BI       class="a-plus-plus">2SR       class="a-plus-plus">2CACU       class="a-plus-plus">2O       class="a-plus-plus">8+       class="a-plus-plus">δ Mesastructure
    • Abstract: Experimental results of the study of the radiation spectra of an oscillator based on the mesastructure of a high-temperature superconducting Bi2Sr2CaCu2O8+δ crystal are presented. The oscillator operating modes are studied, the terahertz radiation in the range 450–750 GHz is obtained, and the Lorentzian shape of the spectral line is measured. It is shown that the minimum oscillation linewidth amounts to 65 MHz. The possibility of phase stabilization of the oscillator radiation is demonstrated.
      PubDate: 2014-01-01
       
 
 
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