Presentazioni e Articoli Tecnici

In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.

Microwave Interstitial Tumor Ablation: New Modality for Treatment of Liver Cancer

S. Maini[1] , A. Marwaha[1] , and S. Marwaha[1]

[1] Department of Electrical & Instrumentation Engineering, SLIET , Longowal (Deemed University), Punjab

Hyperthermia is newly back in the interest of both, clinical and research oncologists, because of its properties to directly produce permanent damages of the treated tumors and to elicit important immunological responses against cancer cells by changing their immunogenicity.  Microwave ablation is used in the treatment of primary and secondary tumors of the liver.  Microwave antennas ...

Finite Element Analysis of Curved Cone Corrugated Ground Plane Conical Antenna

R. Sharma, and A. Marwaha
SLIET, Longowal, Sangrur
Punjab, India

Curved cone corrugated ground plane conical antenna has been designed and analyzed using Finite Element Method. In this paper, we introduce a novel Curved cone corrugated ground plane conical antenna for ultra-wideband (UWB) applications. The antenna is composed of curved cone with narrow corrugation on finite ground plane and fed by a 50? coaxial cable. The designed antenna operates over ...

Microwave Exposure System for In Vitro and In Vivo Studies - new

C. Nadovich[1, 2], W. D. Jemison[2], J. A. Stoute[3], C. Spadafora[4]
[1]Lafayette College, Easton, PA, USA
[2]Clarkson University, Potsdam, NY, USA
[3]Pennsylvania State University, Hershey, PA, USA
[4]INDICASAT AIP, Ciudad del Saber, Panama

A computer controlled microwave exposure system and specialized applicators were constructed for the purpose of facilitating accurate observations of microwave radiation effects on uninfected and infected biological tissue in vitro and in vivo under different electromagnetic modalities and exposure configuration. To address diverse requirements, three different applicators were developed: a ...

S-parameter Sensitivity Analysis of Waveguide Structures with FEMLAB

Li, D., Nikolova, N.K.
Computational Electromagnetics Research Laboratory, Department of Electrical and Computer Engineering, McMaster University, Hamilton, Ontario

For the purpose of accurate and efficient design of a microwave structure, sophisticated optimization techniques are typically used. The optimization process can greatly benefit from the availability not only of the objective function, but also its gradient. Numerical electromagnetic solvers do not provide the gradient information, thus defaulting to the finite-difference approximation at the ...

Chiral surface plasmon polaritons on metallic nanowires

S. Zhang
Institute of Physics CAS
Beijing
China

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.

Terahertz Resonant Dipole Nanoantennas

S. Tuccio [1], A. Alabastri[1], L. Razzari[1], A. Toma[1], C. Liberale[1], R. Proietti Zaccaria[1], F. De Angelis[1], G. Das[1], E. di Fabrizio[1]
[1]Istituto Italiano di Tecnologia, Genova, Italy

Nanoantennas have been successfully employed in a wide set of applications. We show the possibility to expand usual nanoantenna functionalities in the THz domain with a gold dipole nanoantenna. We considered an array of aligned planar gold nanoantennas over a silicon substrate. The high near field enhancement, localized at the device ends, indicates potential uses for THz spectroscopy and ...

Commercial Special Fibers for Sensing Applications

G. Latha[1], P. Nair[1]
[1]SSN College of Engineering, Chennai, Tamil Nadu, India

In a solid core PCF, structural parameters and the number of rings in the cladding region decide confinement losses, dispersion coefficients as well as bending losses. This paper evaluates some of commercially available solid core photonic crystal fibers. The dispersion coefficients and sensitivity of these fibers are estimated using COMSOL Multiphysics®, and compared with the theoretical values ...

Complex K-Bands Calculation for Plasmonic Crystal Slabs by Means of Weak Formulation of Helmholtz's Eigenvalue Equation

G. Parisi[1], P. Zilio[1], F. Romanato[1]
[1]University of Padova, Padova, Italy

We present a Finite Element Method (FEM) to calculate the complex valued k(?) dispersion curves of a photonic crystal slab in presence of both dispersive and lossy materials. In particular the method can be exploited to study plasmonic crystal slabs. We adopt Perfectly Matched Layers (PMLs) in order to truncate the open boundaries of the model, including their related anisotropic permittivity and ...

Transient RF Heating of a Conductive Implant: Coupled Electromagnetic/Thermal Simulation and Experimental Validation

A. Leewood[1], D. Gross[1], J. Crompton[2], S. Yushanov[2], O. Simonetti[3], Y. Ding[3]
[1] MED Institute Inc., West Lafayette, IN, USA
[2] AltaSim Technologies, Columbus, OH, USA
[3] Ohio State University, Columbus, OH, USA

The purpose of this work was to establish a reliable radio frequency (RF) heating simulation which directly provides transient temperatures for medical devices with high geometric fidelity. These temporal results of localized temperatures can be used to determine conditions for safety of medical devices in the magnetic resonance (MR) environment. Information from this work will directly benefit ...

Topographic Effects on Radio Magnetotelluric Simulations on Levees: Numerical Modeling for Future Comparison With Fields Results

R. Duval[1], C. Fauchard[1], R. Antoine[1]
[1]ERA23-IFSTTAR, Laboratoire des Ponts et Chaussées de Rouen, CETE-Normandie Centre, France

We study the topography influence of levees on the electric resistivity signal obtained with the Radio-Magnetotelluric method. Field measurements have been modeled with COMSOL, using the AC/DC and RF Modules. A levee situated in Orléans along the Loire river (France) has been considered in order to design a model tacking account of the skin depth and the incident wavelength, keeping a constant ...

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