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Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Simulation of Realistically Shaped Nanoantennas Using COMSOL Multiphysics

C. Moosmann, G. Sigurdsson, K. Dopf, M. D. Wissert, H.-J. Eisler, and U. Lemmer
Light Technology Institute
Karlsruhe Institute of Technology
Karlsruhe, Germany

Nanoantennas – nanometer sized gold structures resonant at optical wavelengths have interesting properties for many applications. For numerical simulations of such structures simplified geometries are usually considered. However the fabricated shapes still differ significantly from perfect geometries and such structures are sensitive to geometrical changes. Here, we investigate how the ...

An Assessment of the Suitability of the Body and Adult Head Coils for Transmission during Paediatric Magnetic Resonance Imaging

G.R. Cook[1], M.J. Graves[1], F.J. Robb[2], D.J. Lomas[1]
[1]Department of Radiology, University of Cambridge, Cambridge, United Kingdom
[2]General Electric Healthcare Coils, Aurora, Ohio, USA

MRI offers many advantages over other modalities and its lack of ionizing radiation is important for children, but can be limited by the radio-frequency (RF) coils available. This work calculates Specific Absorption Rate (SAR) and homogeneity of the RF transmit field (B1+) when imaging infants in adult coils. Two birdcage-type coils were loaded by a tissue model and their B1+ homogeneities ...

Microwave Applicators With Conveyor Belt System

A. Methlouthi, O. Rouaud, and L. Boillereaux

Industrial microwave ovens are widely used in agri-food and chemical applications. Resonant cavities are used to speed up chemical reactions and have the advantage to be small sized and efficient in terms of microwave distribution. These multimode cavities are considered as batch ovens where a small amount of products is treated. Rotating plates are added in the cavities to ensure a homogeneous ...

Calculations of the FMR Spectrum in 1D Magnonic Crystals

M. Mruczkiewicz[1], M. Krawczyk[1], V.K. Sakharov[2], Yu. V. Khivintsev[2], Yu. A. Filimonov[2], S. A. Nikitov[3]
[1]Nanomaterials Physics Division, Faculty of Physics, Adam Mickiewicz University, Pozna?, Poland
[2]Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences (Saratov Branch), Saratov, Russia; Laboratory “Metamaterials”, Chernyshevsky Saratov State University, Saratov, Russia
[3]Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia; Laboratory “Metamaterials”, Chernyshevsky Saratov State University, Saratov, Russia

FMR spectra of the periodic microstructures (one-dimensional magnonic crystals, 1D MCs) were obtained using COMSOL with use partial differential equation interface. Results of these calculations were successfully compared with an experimental data for Damon-Eshbach (DE) and Backward-Volume (BV) geometries. The presented tool allows to analyze periodic structures with various geometries and ...

Design Optimization of Waveguide Applicator for Microwave Hyperthermia Cancer Treatment

P. Kumar [1], S. Kalra[1], A. Marwaha[1]
[1]Department of Electronics and Communication Engineering, Sant Longowal Institute of Engineering Technology Longowal, Punjab, India

The optimized design of a waveguide applicator has been proposed for superficial microwave hyperthermia using COMSOL Multiphysics 3.5a. In microwave hyperthermia cancer treatment body tissue is exposed to high temperatures using external and internal heating devices. Non-Invasive or external hyperthermia is used to treat tumors that are in or just below the skin (superficial). Non-invasive ...

Analysis of Electromagnetic Propagation for Evaluating the Dimensions of a Large Lossy Medium

A. Pellegrini[1] and F. Costa[1]
[1]ALTRAN Italia, Pisa, Italy

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 the study is to determine the feasibility of a radar technique for measuring the length of the dielectric wedge. In order to address this problem and to evaluate ...

Thermo-Elastic Response of Cutaneous and Subcutaneous Tissues to Noninvasive Radiofrequency Heating

J. Jimenez-Lozano[1], P. Vacas-Jacques[1], W. Franco[1]
[1]Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA

Radiofrequency (RF) technology offers unique advantages for noninvasive selective heating of relatively large volumes of tissue. In this work, we present a mathematical model for selective non-invasive, non-ablative RF heating of cutaneous and subcutaneous tissue (with detailed fiber septa structures) including their thermo-elastic response. Our analysis shows that the fiber septa architecture ...

Analysis of RF Characteristics of a Compound Semiconductor Device Integrated with a Wide-Band Antenna for THz Wireless Communications

A. Tashiro[1], M. Nakamura[1], M. Suhara[1]
[1]Tokyo Metropolitan University, Hachioji City, Tokyo, Japan

Use of the terahertz(THz) region, which is unexplored frequency band, is investigated and expected for the next-generation high-speed wireless communication. In this presentation, we propose a monolithic integrated device by using mesa-shaped compound semiconductor and a thin-metal broadband antenna which is capable in THz operation, and we analyze several characteristics of the device by using ...

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 ...

The Simulation of Motion of a Slider upon a Stator Due to Frictional Force Using COMSOL Multiphysics® Software - new

H. B. Nemade[1]
[1]Indian Institute of Technology Guwahati, Guwahati, Assam, India

The Surface Acoustic Wave (SAW) linear motor was studied which is developed utilizing the friction principle for driving. The principle says that, when a slider is placed on the Rayleigh waves generated on a stator, the slider moves in reverse direction of the wave due to friction between the stator and the slider. A LiNbO3 piezoelectric substrate is used as a stator where comb structured Al ...