Artigos Técnicos e Apresentações

Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Modeling the Interaction of Light with Plasmonic Nanoparticles

T. Gál[1], Ö. Sepsi[1], P. Koppa[1]
[1]Budapest University of Technology and Economics, Budapest, Hungary

Plasmonic nanoparticles have received increased interest due to their numerous potential applications in the field of optics and optoelectronics. Currently such metallic nanoparticles are applied in semiconductor devices, such as light emitting diodes (LEDs) and solar cells. The optical behaviour of a single plasmonic nanoparticle is can be easily described with several analytic or semianalytic ...

Analysis and Development of Koch Fractal Dipole Antennas

V. S. Wildner[1], M. G. Vanti[1]
[1]Regional University of Blumenau - FURB, Blumenau, SC, Brazil

Devices of mobile communication require smallest sizes of antennas. This is one of the applications of fractal antennas which have reduced size or are multiband and can be used for mobile phone, RFID, Wi-Fi, digital TV, among other applications. The Koch fractal geometry allows better space filling, then it is possible to build antennas electrically longer than linear antennas that have the same ...

Electromagnetic Environment Generated in a TEM Cell for Biological Dosimetry Applications

M. Morega and A. M. Morega
Politehnica University of Bucharest, Bucharest, Romania

The dosimetric analysis of the non-ionizing electromagnetic field (EMF) penetration in exposed biological material requires the existence and monitoring of a controlled testing environment.The practical solution for high frequency EMF exposure is the setting of the experiment in an anechoic chamber, or, more economically, in a TEM cell that is able to provide a reduced testing region with EMF ...

Simulation of the Destruction Effects in CMOS-Devices caused by Impact of Fast Transient Electromagnetic Pulses

M. Rohe, S. Korte, and M. Koch
Institute for the Basics of Electrical Engineering and Measurement Science, Leibniz Universität Hannover, Germany

In this paper will be presented how an electronic system and its components will respond in case of an impact of an external electromagnetic pulse (EMP). In the first instance the coupling process of transient electromagnetic pulses into electronic systems will be shown. Out of that the disturbing signal inside the system, which is necessary for the following simulation, will be described ...

Analysis of Transient Electromagnetic Dipole

J.C. Crompton[1], K.C. Koppenhoefer[1], and S.Y. Yushanov[1]
[1]AltaSim Technologies, LLC, Columbus, Ohio, USA

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 closed-form solution for this problem. This work implements Maxwell’s equations in the RF module and optimizes solver parameter settings to resolve the transient ...

Analysis of Super Imaging Properties of Spherical Geodesic Waveguide Using COMSOL Multiphysics

D. Grabovi?ki?[1], J.C. González[1], P. Benítez[1], J.C. Miñano[1]
[1]Cedint Universidad Politécnica de Madrid, Madrid, Spain

Negative Refractive Lens (NRL) has shown that an optical system can produce images with details below the classic Abbe diffraction limit. This optical system transmits the electromagnetic fields, emitted by an object plane, towards an image plane producing the same field distribution in both planes. Recently, two devices with positive refraction, the Maxwell Fish Eye lens (MFE) (Leonhardt et al. ...

Design of a MEMS Resonator for a Centre Frequency Greater than 26.35 MHz and Temperature Coefficient Frequency Less than 0.5 ppm

S.Manikandan[1], R.Radeep krishna[1]
[1]Kalasalingam University, Department of ECE, Srivilliputtur ,Krishnan koil, Tamil Nadu, India

The variability of the design parameters caused by material properties like thermal conductivity is the major challenge in Micro Electromechanical System (MEMS). In resonator design the basic problem is that the frequency changes with temperature variation and quantitative explanation with respect to this varies. The change can be attributed to the stability in terms of frequency drift in parts ...

Surface Plasmon Resonance Dependence on Size in Metallic Nano-Spheres

K. Kluczyk[1], W. Jacak[1]
[1]Institute of Physics, Wrocław University of Technology, Wrocław, Poland

Surface plasmon resonance in metallic nanoparticles is highly and shape dependent, which enables varius applications in photovoltaics, photonics, sensing and even medicine. Particularly we observe redshift in plasmon resonance with increasing nanoparticle size. We investigate nanoparticle size influence on plasmon resonance within theoretical and numerical approach and compare results with ...

Chiral surface plasmon polaritons on metallic nanowires

S. Zhang
Institute of Physics CAS

Chiral SPPs can be generated by linearly polarized light incident at the end of a nanowire, exciting a coherent superposition of three specific nanowire waveguide modes. Chirality is preserved in the emitted photons, creating a subwavelength ¼ wave plate.

A Study of Geometrical Shape of Central Plate in Electrostatic Actuation

K. M. V. Swamy[1], B. G. Sheeparamatti[1], G. R. Prakash [1]
[1]Department of Electronics and Communication, Basaveshwara Engineering College, Bagalkot, Karnataka, India

This study is performed to know which central plate geometry is best suited for electrostatically actuated switch. The simulation is carried out in COMSOL Multiphysics, where user is free to model the geometry without depth knowledge about geometrical dependency of electrostatic. The study of the centrally suspended geometrical models such as circle, square and rectangle suspended by two short ...

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