Knowledge Centre
Find a document written by the best international scientists in our secure database.
24776 documents found.
Imaging thin PEC cylinders via a linear inversion scheme and a spatially varying threshold
Imaging thin PEC cylinders via a linear inversion scheme and a spatially varying threshold Raffaele Solimene and Rocco Pierri Abstract -- The imaging of thin perfect electric conducting (PEC) objects embedded in a homogeneous and Iossless medium for a two-dimensional and scalar geometry is addressed. A multifrequency/multi-static configuration with the scattered field observed over a line of finit
Forward and inverse integral equation methods in two-and-half dimension for geophysical electromagnetic problems
Forward and inverse integral equation methods in two-and-half dimension for geophysical electromagnetic problems Peter M. van den Berg', Aria Abubakar2 and Tarek M. Habash? Abstract -- We discuss a two-and-half dimensional forward algorithm for modelling low-frequency electromagnetic scattering problems, based on a domain integral equation approach. A standard Conjugate Gradient method is employed
Electrodynamical analysis of a transmittive metal-dielectric
Electrodynamical analysis of a transmittive metal-dielectric microstructure by the method of single expression Hovik V. Baghdasaryan, Tamara M. Knyazyan and Grigori G. Eyramjyan Abstract -- Transmittive properties of planar metal-dielectric (Ag-GaN) microstructures are analysed via numerical simulation by the method of single expression (MSE). Brief description of MSE is presented. Conditions of h
Bias-dependent models of microwave transistors based on PKI
Bias-dependent models of microwave transistors based on PKI artificial neural networks Zlatica D. Marinkovié1, Olivera R. Pronie-Rancic2 and Vera V. Markovic3 Abstract -- Applications of artificial neural networks (ANNs) with additional prior knowledge at its inputs (PKI ANNs) in biasdependent modelling of microwave transistors are proposed in this paper. Here, modelling of microwave FET scatterin
Automated grid services composition for CAE of aperture-antenna arrays
Automated grid services composition for CAE of aperture-antenna arrays 3 Alessandra Esposito', Luciano Tarricone2 , Laura Vallone and Mariangela Vallone4 Abstract -- Many electromagnetic applications require the availability of high computing performance, Computer Aided Engineering (CAE) of aperture antenna arrays being an example. Due to the complexity of the involved problems, a suited approach
A new compact half-disc monopole anetnna (HDMA) for UWB communications systems
A new compact half-disc monopole anetnna (HDMA) for UWB communications systems Mohamed Nabil Srifi, Otman El-Mrabet and Mohamed Essaaidi' Abstract -- In this paper, we present a novel half-disc monopole antenna for ultra-wideband applications. The proposed antenna gives a bandwidth of 2.3 to 6.1 GHz for S11 <-I0dB, and satisfies the voltage standing wave ratio requirement of less than 2.0 in the f
Evaluation of reconstruction error in microwave holod imaging with reduced data sets
Evaluation of reconstruction error in microwave holod imaging with reduced data sets Joseph T. Case', Andrea Randazzo', Mateo Pastorino3 and Reza Z Abstract -- The need for rapid and efficient imaging systems for detection of defects in known structures or buried objects requires the development of fast inversion techniques. Microwave and millimeter wave holography have proven to be very effective
Synergetic Crest Factor Reduction and Baseband Digital Predistortion for Adaptive 3G Doherty Power Amplifier Linearizer Design
Synergetic Crest Factor Reduction and Baseband Digital Predistortion for Adaptive 3G Doherty Power Amplifier Linearizer Design Oualid Hammi, Student Member IEEE, Scott Carichner, Member, IEEE, Bill Vassilakis, Senior Member IEEE, and Fadhel M. Ghannouchi, Fellow, IEEE Abstract -- A novel approach for power amplifier (PA) characterization suitable for single iteration digital predistorter synthesi
Sub-Millimeter-Wave Imaging Array at 500 GHz Based on 3-D Electromagnetic-Bandgap Material
Sub-Millimeter-Wave Imaging Array at 500 GHz Based on 3-D Electromagnetic-Bandgap Material Inigo Ederra, Ramôn Gonzalo, Member, IEEE, Byron E. J. Alderman, Peter G. Huggard, Bastiaan P. de Hon, Martijn C. van Beurden, Axel Murk, Laurent Marchand, and Peter de Maagt, Fellow, IEEE Abstract--The design, fabrication, and characterization of a 500-GHz electromagnetic bandgap (EBG) based heterodyne rec
Stability Analysis of Oscillation Modes in Quadruple-Push and Rucker' s Oscillators
Stability Analysis of Oscillation Modes in Quadruple-Push and Rucker' s Oscillators Franco Ramirez, Member, IEEE, Mabel Ponton, Sergio Sancho, Member, IEEE, and Almudena Suarez, Senior Member, IEEE Abstract--Oscillator systems composed by N sub-oscillators coupled through a symmetric linear network enable the combination of output power at the first or Nth harmonic component of the oscillation fr