Veröffentlichungen und Präsentationen

Hier finden Sie Veröffentlichungen und Präsentationen der weltweit stattfindenden COMSOL-Konferenzen. In diesen präsentieren Ihre Fachkollegen ihre neuesten mit COMSOL Multiphysics entwickelten Produkte und Ideen. Die Forschungsthemen umfassen ein weites Feld von Industrien und Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Nutzen Sie die Quick Search, um die zu Ihrem Forschungsbereich passenden Präsentationen zu finden.

RF Hot-Zone Location within Rectangular Confined Spaces

R. Rodriguez[1]
[1]University of the West Indies, St. Augustine, Trinidad and Tobago

RF propagation modelling in (30 – 1000 MHz) SAR region for predicting the location and intensities of constructive interference patterns within rectangular confined spaces using waveguide theory and ray tracing techniques.

Numerical Study of the Scattering of a Short-Pulse Plane Wave by a Buried Sphere in a Lossy Medium

F. Frezza[1], F. Mangini[1], M. Muzi[2], P. Nocito[3], E. Stoja[1], N. Tedeschi[1]
[1]Department of Information Engineering, Electronics and Telecommunications, "La Sapienza" University of Rome, Rome, Italy
[2]Institute of Advanced Biomedical Imaging, "G. d'Annuzio" University Fondation, University "G. d'Annuzio" Chieti-Pescara, Chieti, Italy
[3]Istituto Superiore C.T.I., Communications Department, Ministry of Economic Development, Rome, Italy

The scattering by a buried sphere in the frequency domain with the use of the Finite Element Method (FEM) implemented by COMSOL Multiphysics, is analyzed. A short-pulse is used as an excitation with the spectrum spanning from 50 MHz to 1 GHz. In order to validate our results, a comparison with data available in the literature is presented, in the simple case of a perfectly-conducting (PEC) ...

Analysis and Design of Antennas for an Implantable Medical Device System for Functional Electrical Stimulation

H. Suri[1]
[1]Alfred Mann Foundation for Scientific Research, Valencia, CA, USA

This poster outlines the results of finite element analyses to study the antenna radiation pattern of an implanted medical device. Also presented are simulation results used to design an electrically small antenna for a portable control unit that communicates with the implants over the Medical Micropower Network Frequency Range [413 MHz to 457 MHz]. Alfred Mann Foundation’s Functional ...

Wireless Power and Communications for Implantable Biosensors

C. Romero[1], M. Mujeeb-U-Rahman[1]
[1]California Institute of Technology, Pasadena, CA, USA

Implantable biosensors have the potential to revolutionize the healthcare industry by allowing patients and their health care providers to continuously monitor blood pH levels, pCO2, proteins, metabolites, and a wide variety of other biomolecules. These devices need to operate completely wirelessly to be used for long term monitoring. Metal coils are attractive candidates for wireless power ...

Super-resolution Properties of the Maxwell Fish-Eye

D. Grabovickic, J. C. Gonzalez, J. C. Miñano, and P. Benitez
Universidad Politecnica de Madrid
Madrid, Spain

In this paper we present an analysis that shows the Maxwell Fish Eye (MFE) only has super-resolution property for some particular frequencies (for other frequencies, the MFE behaves as conventional imaging lens). These frequencies are directly connected with the Schumann resonance frequencies of spherical symmetric systems. The analysis have been done using a thin spherical waveguide (two ...

Biological Effects and Therapeutic Applications of Electromagnetic Radiations

A. Singh[1], S. Maini[1], and M. Anupma[1]
[1] Department of Electrical & Instrumentation Engineering, Sant Longowal Institute of Engineering and Technology , Longowal (Deemed University), Punjab, India

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 through the human body; the nature of changes that such signals could induce in natural electrochemical processes and voltage is a subject of interest and of ...

Microwave Coagulation Therapy Using Microwave Antenna

M. Surita[1], M. Patel[2], and S. Marwaha[1]
[1] Department of Electrical & Instrumentation Engineering, SLIET , Longowal (Deemed University), Punjab
[2] ABES Engineering College, Department of Electronics and Communication Engineering, Ghaziabad

The purpose of this paper is to illustrate the microwave coagulation therapy (MCT) that can be used mainly for the treatment of hepatocellular carcinoma. In this treatment invasive technique are used in which thin microwave coaxial antenna is inserted into the tumor and the microwave energy heats up the tumor to produce the coagulated region including the cancer cells. We have to heat the cancer ...

Analysis and Optimization of Dual Arm, Center Excited, Surface Micro-machined Archimedean Spiral Antenna with Improved Wideband Characterestics

G. Miranda[1], N. S. Pamidighantam[1], R. V. Iyer[2], S. Shukla[3], P. Suresh[3], and P. M. Soundarajan[3]
[1]Department of Telecommunications, PESIT, Bangalore,Karnataka,India
[2]Department of Science and Humanities, PESIT, Bangalore,Karnataka,India

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 the spiral. Micro-machining techniques improves the bandwidth characteristics and the radiation efficiency of the antenna. Simulations and results with COMSOL ...

Computational Modeling to Study the Treatment of Cardiac Arrhythmias using Radiofrequency Ablation

A. González-Suárez[1], M. Trujillo[2], J. Koruth[3], A. D'Avila[3], E. Berjano[1]
[1]Biomedical Synergy, Electronic Engineering Department,Universitat Politècnica de Valencia, Valencia, Spain
[2]Instituto Universitario de Matemática Pura y Aplicada, Universitat Politècnica de Valencia, Valencia, Spain
[3]Helmsley Cardiac Electrophysiology Center, Mt SinaiMedicalCenter and School of Medicine, New York, NY, USA

Previous studies proposed using bipolar radiofrequency ablation across two catheters placed on opposing surfaces of the ventricular wall to create transmural lesions. 2D and 3D models were built and solved with COMSOL Multiphysics software. With these models, it was possible to study the temperature distribution and lesion geometry (Figure), to compare the potential of two ways of applying ...

Electromagnetic Field Computations for Saturated Porous Media

S. Cambon[1], I. Bogdanov[1]
[1]CHLOE, Bâtiment UFR Sciences et Techniques, Pau Cedex, France

Non-conventional hydrocarbon resources become more and more challenging object for energy producing companies throughout the world. Being already known and long-explored method, the electromagnetically (EM) assisted recovery constitutes a promising idea of technology for deposits of such a kind. COMSOL has been used recently for modeling the thermal multiphase flow through porous media in the ...

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