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  Subjects -> ELECTRONICS (Total: 184 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 7)
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 6)
Advances in Electronics     Open Access   (Followers: 79)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Microelectronic Engineering     Open Access   (Followers: 13)
Advances in Power Electronics     Open Access   (Followers: 33)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 318)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 24)
Annals of Telecommunications     Hybrid Journal   (Followers: 9)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 9)
Archives of Electrical Engineering     Open Access   (Followers: 13)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 28)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 19)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 36)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
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   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 8)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 267)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 106)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 86)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 93)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 51)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage Materials     Full-text available via subscription   (Followers: 3)
EPJ Quantum Technology     Open Access  
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 195)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 97)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 77)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 46)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 67)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 70)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 56)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 20)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 40)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 26)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 70)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 46)
IET Smart Grid     Open Access  
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 58)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 25)
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 13)
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: 10)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 6)
International Journal of Control     Hybrid Journal   (Followers: 11)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 2)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Hybrid Intelligence     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 14)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 8)
International Journal of Nano Devices, Sensors and Systems     Open Access   (Followers: 12)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 24)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 3)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 10)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 25)
Journal of Electrical Bioimpedance     Open Access  
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 7)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 8)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 4)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 3)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 169)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 7)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 9)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal  
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 10)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 29)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 5)
Microelectronics and Solid State Electronics     Open Access   (Followers: 19)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 33)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal  
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
Optical Communications and Networking, IEEE/OSA Journal of     Full-text available via subscription   (Followers: 15)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 1)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 5)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 9)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 5)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 54)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 75)
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 2)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)
Wireless Power Transfer     Full-text available via subscription   (Followers: 4)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 11)
Електротехніка і Електромеханіка     Open Access  

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Similar Journals
Journal Cover
Electronics Letters
Journal Prestige (SJR): 0.407
Citation Impact (citeScore): 2
Number of Followers: 26  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0013-5194 - ISSN (Online) 1350-911X
Published by IET Homepage  [42 journals]
  • in brief
    • Pages: 626 - 626
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • interview
    • Pages: 626 - 626
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • not half bad
    • Pages: 627 - 627
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • time-to-digital conversion
    • Pages: 628 - 628
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Compact SIW cavity MIMO antenna with enhanced bandwidth and high isolation
    • Authors: Bing-Jian Niu;Jie-Hong Tan;
      Pages: 631 - 632
      Abstract: A compact substrate-integrated-waveguide (SIW) cavity multiple-input–multiple-output (MIMO) antenna with enhanced bandwidth and high isolation is proposed. It is based on a triangle half-mode SIW cavity with one open edge and two edges shorted by metallic vias. By etching three slots, the single cavity can be divided into four eighth-mode sub-cavities. Two large sub-cavities with the same size are excited by two coaxial ports to construct two antenna elements and a wide slot between them is utilised as the de-coupler. Therefore, high isolation can be obtained. On the other hand, cavity energy can be coupled from the excited sub-cavities to the unexcited sub-cavities due to two narrow T-shaped slots serving as the couplers. Therefore, enhanced bandwidth can be achieved by merging two coupled modes into the required operating band. A fabricated prototype centring at 3.51 GHz has been measured. With a compact size of 0.59λ0 × 0.59λ0, enhanced bandwidth of 160 MHz, high isolation of 19.5 dB, the antenna gain of 4.9 dBi, and radiation efficiency of 72.8%, the proposed design has potential applications for fifth-generation communication.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Focused microwave thermotherapy technique based on microwave tomographic
           imaging
    • Authors: N. Simonov;S.-H. Son;
      Pages: 633 - 634
      Abstract: The main issue of focused microwave thermotherapy is to find an appropriate model for the body's dielectric map and the target position for microwave treatment. This Letter proposes the method to synthesise the focusing array excitation vector from the preliminary evaluated dielectric image of the human body. The dielectric image is reconstructed from scattering signals measured by the same antenna array, and the array excitation vector is extracted from the singular value decomposition of the multi-static scattering data matrix. To demonstrate the proposed technique, the authors solve a two-dimensional inverse electromagnetic scattering problem and a bio-heat equation.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Ultra-low frequency magnetic field probe for field measurements in
           gradient coils during medical device testing
    • Authors: A. Attaran;C.M. Wawrzyn;W.B. Handler;B.A. Chronik;
      Pages: 634 - 636
      Abstract: In this Letter ultra-low frequency probes for measuring time-varying magnetic field produced in gradient coils were designed, fabricated, and tested. A 1 cm radius induction loop antenna followed by an instrumentational amplifier with a gain of 40 dB and a cutoff frequency of 30 KHz was designed to measure the magnetic field. The probe was fabricated on a single-sided PCB, FR4 of thickness 1.57 mm and copper of thickness 35 μm was employed in a dB/dt exposure system within a saline phantom using 3D printed waterproofed cover. Simulation and measurement results of the magnetic field were in good agreements.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Asynchronous sampling of an active non-synchronised time-to-digital
           converter
    • Authors: A. Mifsud;I. Sedgwick;N. Guerrini;
      Pages: 636 - 638
      Abstract: An architecture for a non-synchronised time-to-digital converter is presented. It makes use of a ring oscillator and a coarse counter for an increased dynamic range. This work aims to enable multiple samples of the converter's state to be acquired asynchronously during one run without having to reset it. Such architecture is useful in applications where multiple timing values are required from a single circuit. In this scenario such architecture suffers from a timing violation when both the sampling and counter clock edges happen concurrently, thus sampling the incorrect state. A solution is proposed, and an example of this implementation is also given.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Charge-sharing bandpass filter with independent bandwidth and centre
           frequency adjustment
    • Authors: H. Ganji;A. Jannesari;Z. Sohrabi;
      Pages: 638 - 640
      Abstract: A semi-passive charge-sharing complex bandpass filter employing positive feedback technique is proposed to control bandwidth at different centre frequencies. In contrast to the previous arts, bandwidth can be changed independent of centre frequency without any rise in the number of clock phases and switches. Also, insightful continuous-time model and block diagram of the proposed filter have been presented. The results of simulation carried out with 0.18 µm CMOS technology at 200 MHz reference frequency for centre frequencies of 10 and 20 MHz and bandwidth of 1, 3 and 7 MHz indicate the filter's ability to control the quality factor excellently.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Oscillator without a combinatorial loop and its threat to FPGA in data
           centre
    • Authors: T. Sugawara;K. Sakiyama;S. Nashimoto;D. Suzuki;T. Nagatsuka;
      Pages: 640 - 642
      Abstract: Virtual field-programmable gate array (FPGA) is an emerging technology to put multiple users in the same FPGA fabric with logical isolation. Security researchers have studied new threats in virtual FPGA and proposed attacks on the logical isolation by exploiting analogue natures of FPGA. These attacks use an oscillator comprising a combinatorial loop to have access to the analogue domain using digital components only. Interestingly, the system in the field prohibits a combinatorial loop by a design rule check. In this Letter, the authors study if prohibiting a combinatorial loop is sufficient to thwart the conventional attacks. They negatively answer the question by showing oscillators without a combinatorial loop. They also show how to detect and reject the proposed oscillators by a design rule check.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Magnetless electromagnetic contactless interrogation technique for unwired
           conductive resonators
    • Authors: M. Baù;M. Ferrari;V. Ferrari;
      Pages: 642 - 644
      Abstract: An electromagnetic contactless interrogation technique to induce and sense mechanical vibrations on miniaturised electrically conductive resonant structures is presented. The structures can be used as passive resonant sensors with proximate contactless readout. No use is made of poling magnets or wired connections to the resonator that is not required to have magnetic properties. An external coil arrangement has one driving and two pickup coils. The driving coil generates a DC magnetic field and two AC magnetic fields at different frequencies: one for excitation and one for probing. Both the AC magnetic fields induce eddy currents on the conductive surface of the resonating structure. The eddy currents at the frequency of the excitation field interact with the DC magnetic field causing alternating forces, which can set the resonating structure into vibration. The eddy currents at the frequency of the probing field generate a magnetic field that is modulated by the vibrations and detected by the pickup coils. A mathematical model of the interrogation principle has been derived and confirmed by numerical solutions. The experimental demonstration is provided by results obtained on an aluminium cantilever resonator.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Perturbation theory to model shielding effectiveness of cavities loaded
           with electromagnetic dampeners
    • Authors: Salvatore Campione;Isak C. Reines;L. K. Warne;Caleb Grimms;Jeffery T. Williams;Roy K. Gutierrez;Rebecca S. Coats;Lorena I. Basilio;
      Pages: 644 - 646
      Abstract: It is well-known that a slotted resonant cavity with high-quality factor exhibits interior electromagnetic (EM) fields that may be even larger than the external field. The authors aim to reduce the cavity's EM fields and quality factor over a frequency band analytically, numerically, and experimentally by introducing microwave absorbing materials in the cavity. A perturbation model approach was developed to estimate the quality factor of loaded cavities, which is validated against full-wave simulations and experiments. Results with 78.7 mils (2 mm) thick ECCOSORB-MCS absorber placed on the inside cavity wall above and below the aperture slot (with only 0.026% cavity volume) result in a reduction of shielding effectiveness>19 dB and reductions in quality factor>91%, providing confirmation of the efficacy of this approach.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Face alignment: improving the accuracy of fast models using
           domain-specific unlabelled data and a teacher–student scheme
    • Authors: Constantino Álvarez Casado;Miguel Bordallo López;
      Pages: 646 - 648
      Abstract: Face alignment is a crucial step in multiple face analysis and recognition tasks. The current state-of-the-art is comprised by very slow methods based on deep learning that require computationally heavy inference and very fast methods based on cascades of regressors that lack the ability to cope with complicated cases or extreme poses. The authors show how collecting a small subset of unlabelled domain-specific data can improve the accuracy of fast-inference models utilising data annotated by a slower one and a teacher–student architecture. In the proposed solution, they annotate a small subset of facial images belonging to two challenging domains using a slow but more accurate model, and this data is used to incrementally train a fast one. Their results show that by adding as little as a 5% of challenging data, they can reduce the error rate in a specific domain up to 30% without losing any generalisation abilities. This training scheme has applicability in numerous computer vision and engineering problems where computational power and model size are constrained by the application and platform or real-time operation is a requirement.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Learning content-adaptive feature pooling for facial depression
           recognition in videos
    • Authors: Xiuzhuang Zhou;Peng Huang;Haoming Liu;Sihua Niu;
      Pages: 648 - 650
      Abstract: Recently, a deep representation of facial depression built on convolutional neural networks has shown impressive performance in video-based depression recognition. However, most existing approaches either fix the weights or using a certain heuristics to integrate the frame-level facial features, resulting in suboptimal feature aggregation in encoding the helpful while discarding noisy information in videos. To address this issue, the authors introduce the memory attention mechanism in a regression network to learn a deep discriminative depression representation, where the residual network module aims at learning frame-level deep feature, while the attention module acts as a pooling layer by adaptively learning the weights emphasising or suppressing face images with varying poses and imaging conditions. They empirically evaluate the proposed approach on a benchmark depression dataset, and the results demonstrate the superiority of their approach over the state-of-the-art alternatives.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Perception enhancement of subthreshold noisy image with vibrational
           resonance
    • Authors: S. Morfu;B.I. Usama;P. Marquié;
      Pages: 650 - 652
      Abstract: The authors reveal the first evidence of subthreshold noisy image perception, which takes benefit of the vibrational resonance phenomenon. Indeed, an appropriate amount of a high-frequency perturbation allows revealing a grey level noisy image through a threshold detector.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Variographic analysis to evaluate the coverage area of a wireless system
           at 5.8 GHz band in a region of oil fields
    • Authors: B.R. Fialho;H.D. Andrade;G. Fontgalland;J.L.S. Paiva;I.S. Queiroz;
      Pages: 652 - 654
      Abstract: The advancement of embedded technologies has led to increasing demand for bandwidth in telecommunications solutions, this increased the researches related to the architecture of wireless networks and applied electromagnetism. In view of this, the digital transceiver radios need an adequate received signal strength indicator to enable the traffic of information by the radio propagation channel and to provide quality in the data network for the users to exercise the operational activities. The objective of this Letter is to perform the exploratory and variographic analysis of the data collected in the oil fields. Hence, evaluate the behaviour of the surface power distribution received from a wireless system in the frequency range of 5.8 GHz located in the well-automation region called Canto do Amaro, Brazil, where there are frequent communications failures for mobile stations. With the data measured in the measurement campaigns, variogram models were constructed and compared for the construction of interpolation matrices and contour maps, with these results the precision criteria of the kriging methods employed in the study region were established.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Transition from rectangular waveguide to empty substrate integrated gap
           waveguide
    • Authors: Zhiqiang Liu;Dongquan Sun;
      Pages: 654 - 656
      Abstract: Empty substrate integrated waveguide (ESIW) is a hollow SIW with its inner dielectric removed to achieve a reduced insertion loss. One of the drawbacks is the top and bottom covers need to be soldered to the middle substrate. Gap waveguide (GW) technology solves the contact issue utilising contactless electromagnetic band-gap (EBG) structures. Therefore, empty substrate integrated GW (ESIGW) is a transmission line having both advantages of ESIW and GW. In this Letter, a wideband transition from rectangular waveguide (RW) to ESIGW is presented. RW is firstly matched to reduced-height RW using E-plane stepped waveguides. Then, a short substrate integrated GW (SIGW) section is introduced between the reduced-height RW and the ESIGW. This section not only serves as an impedance matching component, it also connects the two sides of the ESIGW and maintains the integrity of the substrate. To broaden the bandwidth of the transition, a triangular dielectric is added at the end of the ESIGW. A Ka-band back-to-back prototype of the transition is designed and fabricated. In addition, TRL calibration is used to measure the transmission performance of the ESIGW. The measured results show that the transition works well over the entire Ka-band.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Substrate resistivity influence on silicon–germanium phototransistor
           performance
    • Authors: Z.G. Tegegne;J. Nanni;C. Viana;G. Tartarini;J.-L. Polleux;
      Pages: 656 - 658
      Abstract: This Letter presents the impact of silicon substrate resistivity on SiGe phototransistors. SiGe phototransistors were fabricated on the commercially available SiGe/Si bipolar technology. The performances of the phototransistors fabricated based on low- and the high-resistive silicon substrate are compared. The phototransistor based on low-resistivity (LR) silicon substrate provides a responsivity of more than double compared to the phototransistor based on a high-resistivity silicon substrate that is fabricated by using the same bipolar transistor technology. The phototransistor fabricated on LR substrate exhibits low-frequency responsivity up to 1.35 A/W (at 50 MHz).
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Low surface damage during ohmic contact formation in AlGaN/GaN HEMT by
           selective laser annealing
    • Authors: Mingchen Hou;Gang Xie;Kuang Sheng;
      Pages: 658 - 660
      Abstract: The formation of ohmic contact in AlGaN/GaN high electron mobility transistor (HEMT) with low surface damage by selective laser annealing is reported. With selective laser annealing, the device exhibits a smaller sheet resistance, which is 74.9% of the device with the conventional rapid thermal annealing process. The dynamic ON-resistance is 1.35 times higher than the static ON-resistance after off-state drain voltage stress of 200 V, which benefits from the low surface defects using laser annealing. While the dynamic ON-resistance with rapid thermal annealing shows 8.66 times higher than the static ON-resistance after off-state drain voltage stress of 125 V. X-ray photoelectron spectroscopy analysis indicates that the AlGaN surface damage related to the oxidation reaction under the high-temperature condition is eliminated by using selective laser annealing, even in the air ambient.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Mesa-type quantum cascade lasers fabricated by using inductively coupled
           plasma reactive ion etching
    • Authors: B.T. Seok;S.Y. Kim;D.H. Jun;J.H. Jang;
      Pages: 660 - 661
      Abstract: Mesa-type and ridge-type InGaAs/InAlAs double-channel quantum cascade lasers (QCLs) emitting 8.15 μm wavelength were fabricated by using metal–organic chemical vapour deposition and inductively coupled plasma reactive ion etching techniques. The output power, threshold current, characteristic temperature (T0), and slope efficiency were compared. The smooth and vertical sidewall profile enabled mesa-type QCL to exhibit the higher output power, the lower threshold current, and the higher slope efficiency than the ridge-type QCL.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Vertical SiC taper with a small angle fabricated by slope transfer method
    • Authors: Yu Xin;Gregory Pandraud;Paddy J. French;
      Pages: 661 - 663
      Abstract: In this Letter, a slope transfer method to fabricate vertical waveguide couplers is proposed. This method utilises wet etched Si as a mask, and takes advantage of dry etching selectivity between Si and SiC, to successfully transfer the profile from the Si master into SiC. By adopting this method, a
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • BER-optimal selection of peak frequency deviation for RDS2
    • Authors: D. Saveri;G. Baruffa;L. Rugini;D.A. Samo;A. Ladanyi;
      Pages: 663 - 665
      Abstract: RDS2 is a newly proposed enhancement of the radio data system (RDS) for frequency modulation (FM) broadcasting, aiming at increasing the data rate. This Letter investigates the BER of the data streams of RDS2. Specifically, the authors propose a selection criterion for the peak frequency deviations of the individual data streams, based on a minimax-BER approach. They also theoretically verify that symbol shifting reduces the peak deviation of the RDS2 data signal by an amount of 25%. Simulation results confirm their theoretical findings.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Hybrid Kaczmarz and coordinate-descent iterations for signal detection in
           massive MIMO systems
    • Authors: Yinman Lee;
      Pages: 665 - 667
      Abstract: A hybrid Kaczmarz and coordinate-descent (H-KCD) iterative algorithm is proposed for signal detection in massive MIMO systems. Together with the specially-designed orthogonal projection and decision operation during iterations, this approach outperforms the standalone usage of either the Kaczmarz or coordinate-descent iteration, and gives better error-rate performance than the linear minimum mean-squared error detection. Essentially, since the Gram matrix is not required for the proposed H-KCD scheme, it owns lower total computational complexity than some state-of-the-art iterative methods.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
  • Zero-bias mitigation method based on optimal correlation interval for
           digital code phase discriminator
    • Authors: Chunjiang Ma;Zhicheng Lv;Xiaomei Tang;Zhibin Xiao;Guangfu Sun;
      Pages: 667 - 669
      Abstract: In time synchronisation systems, the code phase of the spread spectrum signal is an important characteristic that can provide users with high-precision and unambiguous observation results. However, digital code phase discriminators have limited sampling frequencies that distort the signal correlation peak and generates a zero-bias code-phase estimate. In this Letter, the authors evaluate and analyse the zero-phase deviations of digital code phases. An optimal correlation interval design method, based on a code phase discriminator that can effectively suppress the zero-crossing deviation, is also proposed. The simulation results show that the proposed algorithm can reduce the deviation of 96.5% and effectively improve the measurement accuracy of the code phase.
      PubDate: 5 30 2019
      Issue No: Vol. 55, No. 11 (2019)
       
 
 
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