T. Eppes, I. Milanovic, and S. Thiruvengadam
University of Hartford
West Hartford, CT
Patch antennas are widely used in communications links with unmanned aerial vehicles. Their hemispherical send and receive patterns enable the systems to maintain radio frequency contact over a wide range of vehicular attitudes. A microstrip-fed design offers other attractive features including lightweight, inexpensive, and a 3-D structure that can be easily integrated into the fuselage. This ...
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 ...
M. Csete, A. Szalai, E. Csapó, A. Somogyi, I. Dékány
Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary
MTA-SZTE Supramolecular and Nanostructured Materials Research Group, University of Szeged, Szeged, Hungary
Novel class of artificial optical antennas are of great interest in biosensing applications of nanoplasmonics due to their unique and tunable spectral properties. Silver colloid spheres covered with L-cysteine were studied experimentally by spectroscopy and TEM and numerically by a COMSOL Multiphysics® simulation. Experimental studies revealed that the Ag NP-Cys core-shell conjugates prefer to ...
Self-Consistent Modeling of Thin Conducting Wires and Their Interaction with the Surrounding Electromagnetic Field
ABB AB, Corporate Research, Västerås, Sweden
It is demonstrated how the RF Module of COMSOL Multiphysics® can be used to approximately model thin conducting wires or cables and how they interact with a surrounding electromagnetic field. Despite being non-stringent the method can reasonably well predict currents induced by an applied electromagnetic field in wires, and networks of wires, as well as fields radiated from current-carrying ...
S. M. Ali, A. K. Jha, S. Mahapatra, M. Panigrahi
Trident Academy of Technology, Bhubaneswar, Odisha, India
Nearly seven lakh Indians die of cancer, while over 10 lakh are newly diagnosed with some form of the disease every year. Surgical resection is not always feasible in patients with hepatocellular carcinoma. Microwave Coagulation Therapy (MCT) has been used as an alternative to resection and its efficiency has been evaluated in tissue microwave irradiation from a dipole antenna causes water ...
Analysis of a Planar Inverted-F Mobile Handset Antenna with Reduced Radiation Towards the Human Head
Cochin University of Science and Technology, Cochin, Kerala, India
This paper deals with the simulation and analysis of SAR and temperature distribution induced by a Planar Inverted-F Antenna on human head model using COMSOL Multiphysics® software. The goal of this paper is to compare the SAR and temperature distributions of omni-directional PIFA with that of a PIFA with reduced radiation towards human head. The two antennas are designed to operate at 900 MHz ...
G.G. Gentili, S. Pietralunga, M. Bolzoni
Politecnico di Milano, Dipartimento di Elettronica e Informazione, Milano, Italy
INFN-CNR, Istituto di Fotonica e Nanotecnologie, Milano, Italy
Grating-assisted optical coupling into long-range modes of strip plasmonic waveguides is analyzed by a 3D numerical simulation with COMSOL Multiphysics. We used the RF Module and its scattering formulation. A comparison with results obtained using the common 2D approximated analysis is shown for the case of 1D grating coupler and input Gaussian beam. Excited diffracted modal field distribution ...
I. Gonin, M. Awida, T. Khabiboulline, V. Yakovlev
Fermilab, Batavia, IL, USA
Project X is a proposed proton accelerator complex at Fermilab. The CW LINAC is based on five types of resonators operating at three frequencies: half-wave, spoke, and elliptical. The low beam current for the CW operation of Project X requires cavities to operate at a high loaded Q and, thus, narrow bandwidth. Therefore, it requires optimal mechanical design of the cavities to minimize the ...