Now showing items 1-20 of 45

  • Small Footprint Multilayered Millimeter-Wave Antennas and Feeding Networks for Multi-Dimensional Scanning and High-Density Integrated Systems 

    Djerafi, T.; Ghassemi, N.; Kramer, O.; Youzkateli-el-Khatib, B.; Guntupalli, A. B.; Wu, K. (Společnost pro radioelektronické inženýrství, 2012-12)
    This paper overviews the state-of-the-art of substrate integrated waveguide (SIW) techniques in the design and realization of innovative low-cost, low-profile and low-loss (L3) millimeter-wave antenna elements, feeding ...
  • Radiation Characteristics of Tunable Graphennas in the Terahertz Band 

    Llatser, I.; Kremers, C.; Chigrin, D. N.; Jornet, J. M.; Lemme, M. C.; Cabellos-Aparicio, A.; Alarcon, E. (Společnost pro radioelektronické inženýrství, 2012-12)
    Graphene-enabled wireless communications constitute a novel paradigm which has been proposed to implement wireless communications among nanosystems. Indeed, graphene-based plasmonic nano-antennas, or graphennas, just a few ...
  • Indoor Wireless RF Energy Transfer for Powering Wireless Sensors 

    Visser, H. (Společnost pro radioelektronické inženýrství, 2012-12)
    For powering wireless sensors in buildings, rechargeable batteries may be used. These batteries will be recharged remotely by dedicated RF sources. Far-field RF energy transport is known to suffer from path loss and therefore ...
  • Antenna Design Concepts Based on Transformation Electromagnetics Approach 

    Tichit, P.-H.; Burokur, S. N.; de Lustrac, A. (Společnost pro radioelektronické inženýrství, 2012-12)
    Using the idea of wave manipulation via coordinate transformation, we demonstrate the design of novel antenna concepts. The manipulation is enabled by composite metamaterials that realize the space coordinate transformation. ...
  • Characterization of 60 GHz Shadowing by Human Bodies and Simple Phantoms 

    Gustafson, C.; Tufvesson, F. (Společnost pro radioelektronické inženýrství, 2012-12)
    The 60 GHz band is very prominsing for high data rate (>1 Gb/s) wireless systems operating at short ranges. However, due to the short wavelengths in this frequency band, the shadowing effects cuased by human bodies and ...
  • 3-D Microwave Imaging for Breast Cancer 

    Cheng, G. G.; Zhu, Y.; Grzesik, J. (Společnost pro radioelektronické inženýrství, 2012-12)
    We introduce a novel microwave imaging technique for breast cancer detection. Our approach provides a one-pass inverse image solution, which is completely new and unprecedented, unrelated to tomography or radar-based ...
  • A Novel Method for Radio Propagation Simulation Based on Automatic 3D Environment Reconstruction 

    He, D.; Liang, G.; Portilla, J.; Riesgo, T. (Společnost pro radioelektronické inženýrství, 2012-12)
    In this paper, a novel method to simulate radio propagation is presented. The method consists of two steps: automatic 3D scenario reconstruction and propagation modeling. For 3D reconstruction, a machine learning algorithm ...
  • Single-band and Dual-band Artificial Magnetic Conductor Ground Planes for Multi-band Dipole Antenna 

    Abu, M.; Rahim, M. K. A. (Společnost pro radioelektronické inženýrství, 2012-12)
    Two new designs of high impedance surface (HIS) structure are presented, namely zigzag and slotted rectangular with I-shaped slot Artificial Magnetic Conductor (AMC). The zigzag AMC is designed based on the straight dipole ...
  • A Fast Frequency Sweep – Green’s Function Based Analysis of Substrate Integrated Waveguide 

    Abaei, E.; Amendola, G.; Arnieri, E.; Costanzo, S.; Mehrshahi, E. (Společnost pro radioelektronické inženýrství, 2012-12)
    In this paper, a fast frequency sweep technique is applied to the analysis of Substrate Integrated Waveguides performed with a Green’s function technique. The well-known Asymptotic Waveform Evaluation technique is used to ...
  • Empirical Modeling of Ducting Effects on a Mobile Microwave Link Over a Sea Surface 

    Yee Hui Lee; Yu Song Meng (Společnost pro radioelektronické inženýrství, 2012-12)
    In this paper, signal enhancement due to the ducts over a sea surface is experimentally investigated and modeled. The investigation is carried out through the study of air-to-ground mobile microwave links over a tropical ...
  • A Hybrid Optimization Algorithm for Low RCS Antenna Design 

    Shao, W.; Zhu, X. (Společnost pro radioelektronické inženýrství, 2012-12)
    In this article, a simple and efficient method is presented to design low radar cross section (RCS) patch antennas. This method consists of a hybrid optimization algorithm, which combines a genetic algorithm (GA) with tabu ...
  • Comparison of Planar Fractal Filters on Defected Ground Substrate 

    Kufa, M.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2012-12)
    The paper discusses approaches to the reduction of dimensions of planar filters (microstrip ones and coplanar ones). Filter dimensions are reduced by applying the fractal theory to the geometry of a filter, and by the ...
  • Impedance Bandwidth and Gain Improvement for Microstrip Antenna Using Metamaterials 

    Xiong, H.; Hong, J. S.; Peng, Y. H. (Společnost pro radioelektronické inženýrství, 2012-12)
    An improved ultra-wideband (UWB) and high gain rectangular antenna is specifically designed in this paper using planar-patterned metamaterial concepts. The antenna has isolated triangle gaps and crossed gaps etched on the ...
  • Compact and High Performance Dual-band Bandpass Filter Using Resonator-embedded Scheme for WLANs 

    Zong, B. F.; Wang, G. M.; Zeng, H. Y.; Wang, Y. W. (Společnost pro radioelektronické inženýrství, 2012-12)
    A compact microstrip dual-band bandpass filter (DBBPF) with high selectivity and good suppression for wireless local area networks (WLANs) is proposed utilizing a novel embedded scheme resonator. Two passbands are produced ...
  • Retrodirective Antenna Array Using High Frequency Offset 

    Sindler, P.; Pokorny, M. (Společnost pro radioelektronické inženýrství, 2012-12)
    The paper deals with the design of a simple retrodirective antenna array exhibiting by high frequency offset between received and transmitted wave. Analysis of the beam pointing error using antenna array model developed ...
  • Current-Mode Universal Filters Employing Single FDCCII 

    Kacar, F.; Yesil, A.; Kuntman, H. (Společnost pro radioelektronické inženýrství, 2012-12)
    In this study, to realize current-mode multifunction filters, three new circuit configurations are presented. The circuits include fully differential current conveyor (FDCCII) and four passive components. First proposed ...
  • Modified Level Restorers Using Current Sink and Current Source Inverter Structures for BBL-PT Full Adder 

    Tirumalasetty, V. R.; Avireni, S. (Společnost pro radioelektronické inženýrství, 2012-12)
    Full adder is an essential component for the design and development of all types of processors like digital signal processors (DSP), microprocessors etc. In most of these systems adder lies in the critical path that affects ...
  • Tunable Versatile High Input Impedance Voltage-Mode Universal Biquadratic Filter Based on DDCCs 

    Jiun-Wei Horng; To-Yao Chiu; Zih-Yang Jhao (Společnost pro radioelektronické inženýrství, 2012-12)
    A high input impedance voltage-mode universal biquadratic filter with three input terminals and seven output terminals is presented. The proposed circuit uses three differential difference current conveyors (DDCCs), four ...
  • Subjective Quality Assessment of the Impact of Buffer Size in Fine-Grain Parallel Video Encoding 

    Montero, P.; Polak, L.; Taibo, J.; Kratochvil, T. (Společnost pro radioelektronické inženýrství, 2012-12)
    Fine-Grain parallelism is essential for real-time video encoding performance. This usually implies setting a fixed buffer size for each encoded block. The choice of this parameter is critical for both performance and ...
  • Optical Control of Millmeter-wave Lateral Double-Drift Region Silicon IMPATT Device 

    Acharyya, A.; Banerjee, S.; Banerjee, J. P. (Společnost pro radioelektronické inženýrství, 2012-12)
    The effect of optical illumination on lateral Double-Drift Region (DDR) structure of Silicon Impact Avalanche Transit Time (IMPATT) device is investigated in this paper. The device is designed to operate at mm-wave W-band ...