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Showing results 1 - 20 of 64

RF Systems

	3D Electromagnetic Field Simulation in Microwave Ovens: A Tool to Control Thermal Runaway In microwave heating applications, the energy is introduced directly into the volume of the material and as consequence the quality of the process is highly dependent on the uniformity of the electromagnetic field distribution along it.... COMSOL Conference 2010, Paris T. Santos¹ , L.C. Costa^1,2 , M. Valente^1,2 , J. Monteiro^1,2 , and J. Sousa³ ¹ University of Aveiro, Portugal ² I3N, Aveiro, Portugal ³ TEKA Portugal S.A., Ílhavo, Portugal
	A Comparison of FDFD and FEM Methods Applied to the Buried Mine Problem The major impediment to detection and characterization of low dielectric contrast nonmetallic buried in soil is the distorting and masking effects of clutter from rough ground surfaces and soil volumetric inhomogeneities. In this work,... COMSOL Conference 2006, Boston R. W. Gamache, C. Rappaport, and M. Farid. TransTech Systems inc., Northeastern University
	A finite–element simulation study of the complex effective permittivity of two-phase random composite materials In the current work we introduce a finite-element method (FEM) for calculating the effective permittivity of macroscopically inhomogeneous media. Specifically, we consider two-dimensional (2d) two-phase heterostructures consisting of hard... COMSOL Conference 2005, Boston Brosseau, C. Laboratoire d'Electronique et Systèmes de Télécommunications, Université de Bretagne Occidentale, Brest, France
	A finite–element simulation study of the complex effective permittivity of two-phase random composite materials In the current work we introduce a finite-element method (FEM) for calculating the effective permittivity of macroscopically inhomogeneous media. Specifically, we consider two-dimensional (2d) two-phase heterostructures consisting of hard... COMSOL Conference 2005, Boston Brosseau, C. Laboratoire d'Electronique et Systèmes de Télécommunications, Université de Bretagne Occidentale, Brest, France
	A finite–element simulation study of the complex effective permittivity of two-phase random composite materials In the current work we introduce a finite-element method (FEM) for calculating the effective permittivity of macroscopically inhomogeneous media. Specifically, we consider two-dimensional (2d) two-phase heterostructures consisting of hard... COMSOL Conference 2005, Boston Brosseau, C. Laboratoire d'Electronique et Systèmes de Télécommunications, Université de Bretagne Occidentale, Brest, France
	A Model of SuperRens Effect to Describe Future Generation Optical Data Storage In the quest for a higher data storage capacity, different solutions for the future generations of optical discs (after the Blu-ray format, BD) are under investigations. An increase of the NA beyond 0.85 (NA of the BD format) requires... COMSOL Conference 2005, Boston Gidon, S., Hyot, B., Poupinet, L. CEA Grenoble Leti
	Analysis and Optimization of Dual Arm, Center Excited, Surface Micro-machined Archimedean Spiral Antenna with Improved Wideband Characterestics An Archimedean Spiral antenna is the common frequency independent antenna which have very large bandwidth. Archimedean Spiral antenna are circularly polarized and typically have radiation patterns with peaks perpendicular to the plane of... COMSOL Conference 2011, Bangalore G. Miranda¹ , N. S. Pamidighantam¹ , R. V. Iyer² , S. Shukla³ , P. Suresh³ , and P. M. Soundarajan³ ¹ Department of Telecommunications, PESIT, Bangalore,Karnataka,India ² Department of Science and Humanities, PESIT, Bangalore,Karnataka,India ³ DARE,Bangalore,Karnataka,India
	Analysis of Electromagnetic Propagation for Evaluating the Dimensions of a Large Lossy Medium In this paper the propagation of a plane wave in a large lossy medium is presented. The investigated geometry consists in a wedgeshaped lossy dielectric embedded in a lossy material with different electromagnetic properties. The aim of... COMSOL Conference 2009, Milan A. Pellegrini¹ and F. Costa¹ ¹ ALTRAN Italia, Pisa, Italy
	Analysis of Microwave Radiation for Heating Microwave heating is an important process for many commercial, industrial and household applications. In microwave heating applications, the energy is introduced directly into the volume of the material. As a consequence the quality of... COMSOL Conference 2011, Boston J. Crompton, S. Yushanov, L. Gritter, and K. Koppenhoefer AltaSim Technologies, LLC. Columbus, OH
	Analysis of Small Multi-element Antennas Using the Eigenmode Solver The eigenmode solver is used to analyze the behavior of small multi-element antennas. We perform an eigenmode simulation of the shorted antenna structure, using perfectly matched layer (PML) outer boundaries, and for some simulations, we... COMSOL Conference 2007, Boston H. Stuart LGS, Bell Labs Innovations, Whippany, NJ, USA
	Analysis of Transient Electromagnetic Dipole This paper presents the solution of a transient electromagnetic problem using COMSOL Multiphysics. The paper also presents a closed-form solution of a transient electromagnetic dipole. The computational solution compares well with a... COMSOL Conference 2009, Boston J.C. Crompton¹ , K.C. Koppenhoefer¹ , and S.Y. Yushanov¹ ¹ AltaSim Technologies, LLC, Columbus, Ohio, USA
	Biological Effects and Therapeutic Applications of Electromagnetic Radiations The electromagnetic fields have a great influence on the behavior of all the living systems. The human body itself is a source of naturally generated electric and magnetic fields. When external signals of comparable strength flows... COMSOL Conference 2009, Bangalore A. Singh¹ , S. Maini¹ , and M. Anupma¹ ¹ Department of Electrical & Instrumentation Engineering, Sant Longowal Institute of Engineering and Technology , Longowal (Deemed University), Punjab, India
	Calculating the Capacitance of Shielded Microstrip Lines This paper presents a numerical analysis for calculating the capacitance of singlestrip and double-strip shielded transmission lines. Modeling and simulation of the capacitance of shielded microstrip lines using COMSOL are illustrated. We... COMSOL Conference 2007, Boston S. M. Musa, and M. N. O. Sadiku College of Engineering, Prairie View A&M University, Prairie View, TX, USA
	Capacitance and Inductance Matrices for Multistrip Lines In this paper, we apply COMSOL Multiphysics, a finite element package, to compute the capacitance of a single centered microstrip line and the capacitance and inductance matrices of coupled multistrip lines. We compared our results with... COMSOL Conference 2007, Boston S. M. Musa, and M. N. O. Sadiku College of Engineering, Prairie View A&M University, Prairie View, TX, USA
	Comparative Study of an Open Waveguide.Application to Deconvolution of a Magnetic Probe in Near-Field Zone We present here our work on deconvolution of a magnetic probe to mesure electromagnetic emissions in near-field zone. To achieve this work,we have chosen a rectangular waveguide (WR90) as a radiating structure.Theoritical near-field is... COMSOL Conference 2010, Paris A. Saghir, J.W. Tao, and C. Avram INP, Laplace site Enseeiht, Toulouse, France
	Computational study of Solidification and Melting of Alloys This paper is written in Chinese. --------------------------------- Keynote speaker's biography: Since 1991, Prof. Shuang-Shii Lian has been with the Department of Materials Science and Engineering, National Taiwan University. He... COMSOL Conference 2006, Taipei Shuang-Shii Lian National Taiwan University
	Confinement Loss Computations in Photonic Crystal Fibres using a Novel Perfectly Matched Layer Design To modelize infinite photonic crystal fibre (PCF) with 2D-finite-geometry mode solver, it is necessary to use a perfectly matched layer (PML). We have performed a new type of PML design to simulate propagation in PCFs. The results... COMSOL Conference 2005, Boston Viale, P., Février, S., Gérôme, F., Vilard, H. IRCOM, CNRS UMR 6615, Limoges, France
	Design Of Magnetoplasmonic Resonant Nanoantennas For Biosensing Applications The study of plasmonic structures continues to be at the forefront of research in nanotechnology and condensed matter physics. Here, we present a numerical model we have created and verified to characterize the frequency dependence of the... COMSOL Conference 2010, Paris M.E. Mezeme, and C. Brosseau Université Européenne de Bretagne–Université de Bretagne Occidentale, Brest, France
	Design Optimization of Slotted Waveguide Antenna Stiffened Structures (SWASS) Design optimization of slotted waveguide antenna stiffened structures (SWASS) is described. SWASS is a multidisciplinary blending of RF slotted waveguide technology and stiffened composite structures technology. Structural analysis and... COMSOL Conference 2010, Boston T. Ha, and R.A. Canfield Virginia Polytechnic Institute and State University, Blacksburg, VA, US
	Dielectric Properties Characterization of Thin-film Samples by using Scanning Near-Field Microwave Microscope (SNMM) and FEMLAB Scanning Near-field Microwave microscope represents a novel approach to thin film dielectric property analysis with high resolution. In this technique, a sharp probe tip is brought into close enough proximity to the sample surface that... COMSOL Conference 2005, Boston Huang, S.1, Reeves, M.E.1, 2 1 Department of Physics, George Washington University, Washington 2 Naval Research Laboratory, Washington, DC

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RF Systems