N. Ayuso, V. Bataller, A. Muñoz, D. Tardioli, J. A. Cuchí, F. Lera, and J. L. Villarroel
Aragón Institute for Engineering Research (I3A), University of Zaragoza, Zaragoza, Spain
Advanced Research Laboratories of I3A, Walqa Technological park, Huesca, Spain
Institute of Material Science of Aragón, CSIC-Universidad de Zaragoza, Zaragoza, Spain
Propagation models for avalanche rescue systems are studied here. The paper focuses on the through-the-snow electric field propagation at ISM frequencies, comparing several models (air model, snow model, three-layered model) and using different solving method (geometrical optics, numerical solution in Matlab and FEM with COMSOL). The simulation results are fitted to experimental data, finding ...
M. G. Sridharan, A. Prabhakar, and S. Bhattacharya
Photonics Group, Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, India
Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, India
Phase gratings are used in many applications owing to their high transmission and thus higher diffraction efficiencies. COMSOL is based on finite element modeling and is chosen for 2 reasons; firstly, because it can handle complex 2-D and 3-D geometries and secondly, it can handle the vector nature of these structures. The objective of the design is to compare the results of a commonly used ...
G. Cerretti, J.-C. Gomez-Lavocat, K. Vynck, D.S. Wiersma
European Laboratory for Non-Linear Spectroscopy (LENS), University of Florence, Sesto Fiorentino, Italy
The Institute of Photonic Sciences (ICFO), Mediterranean Technology Park, Castelldefels, Spain
Istituto Nazionale di Ottica (INO), National Research Council (CNR), Florence, Italy
Liquid-crystal elastomers (LCEs)  have attracted a great attention in recent years due to their high potential in a wide range of applications, from microfluidics components  to artificial muscles . The photo-mechanical response of LCEs is due to their constitutive photo-sensitive molecules, which change shape when absorbing part of the incident light. These microscopic deformations can ...
C. Caiseda, V. Aksyuk, I. Griva
Inter American University of Puerto Rico, Bayamon, PR, USA
National Institute of Standards and Technology, Gaithersburg, MD, USA
George Mason University, Fairfax, VA, USA
The optimal design of the grating coupler for surface plasmon generation is revisited for its interdisciplinary importance in the efficient use of energy, and the strong dependence of the energy convergence rate of the system on the design. This work contributes a comprehensive gradient based numerical optimization technique to optimize both geometry of the grating and parameters of the ...
K. M. V. Swamy, B. G. Sheeparamatti, G. R. Prakash 
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 ...
I. Zabkov, V. Klimov, A. Pavlov, D. Guzatov
MIPT, Moscow, Russia
Lebedev Physical Institute, Moscow, Russia
Yanka Kupala Grodno State University, Grodno, Belarus
Influence of chiral objects on spontaneous emission of atoms and molecules is under attention nowadays. The problem of interaction of chiral molecules with one  or two chiral  spheres was solved analytically recently by our group. The analytical results however are very difficult and needed to be calculated carefully. We modify the RF Module of COMSOL Multiphysics® in order to simulate ...
V. Kivijärvi, M. Erdmanis, I. Tittonen
Aalto University, Department of Micro- and Nanosciences, Espoo, Finland
SOI (Silicon on Insulator) technology utilizes silicon components on SiO2 layer. Propagating electric field distribution in a SOI waveguide is called mode of the waveguide. Photonic gratings are formed by etching grooves on the top of a waveguide. Gratings can operate in two directions. They can guide incident beam into a waveguide or a waveguide mode out of the structure. We study the ...
R. Kumar, H. B. Pandya , S. Danani , P. Vasu , V. Kumar
ITER-India, Gandhinagar, Gujarat, India
The ITER-ECE transmission lines consist of smooth-wall circular waveguides, including miter bends and other components. The performance of the TL is crucial to ensuring that the requirements for the diagnostic to measure the plasma parameters are met. COMSOL Multiphysics® has a finite element method with a built-in Eigenmode matrix solver. The accuracy of COMSOL solutions depends on the size of ...
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, R.Radeep krishna
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 ...
Vaishali Rawat, Sougata Chatterjee, Shantanu Das, S.N.Kale
Defense Institute of Advanced Technology, Pune, India
Giant Metrewave Radio Telescope,Tata Institute of Fundamental Research,Pune, India
Reactor Control Division, B.A.R.C., & Adjunct Faculty, DIAT, Pune, India
Metamaterial [1, 2] is an artificially structured material where it’s electrical (ϵ), magnetic (μ) and its refraction properties (n) are simultaneously negative in narrow frequency band. Currently, metamaterials are being widely used in microwave and radio frequencies as devices [3, 4] like filter, coupler, antenna etc. However, the applicability of metamaterial as High Energy Microwave (HEM) ...