How to add a static current in Electromagnetic wave transient study
Hi, I am working on a problem using electromagnetic waves transient module. I want to study the interaction between incident EM waves and an annulus conductor in which a static current is flowing on...
View ArticleQuestion about modeling propagating plane wave (wave optics)
Hi, I am new to Comsol, so unfortunately I have little experience. I am trying to set up a very simple model in which I have a propagating plane wave in air, normally incident upon different materials...
View Articleserval questions of heat transfer in my project
Hello As the figure shows, I am using the fllowing models (Heat Transfer>Conjugate Heat Transfer>Laminar Flow Stationary situation Surface-to-Surface Radiation), and try to find the temperature...
View ArticleHow to calculate the wave's power which pass through an edge before a PML...
Hello, I am now building a 2D structure which is half-infinite, which I should add a PML layer. Wave incident to the structure and I would like to calculate how much power it remains after passing...
View ArticleIs there any difference to build 1 domain and 2 domains with the same...
Hey guys, I am trying to build a model to calculate a component's absorption. The component lays on Si and the wave incidents from air to Si. I use periodic PC and 2 periodic ports to calculate it. But...
View Articlehow to calculate electrical and mechanical parameters of the following design...
i designed an RF MEMS Switch in comsol 5. i need to calculate the electrical and mechanical parameters like applied force, moment of inertia. i applied the pull down voltage of 5v.
View ArticleBest Way to Incident Electric Field
I'm currently working on modeling a 2D gradient index metamaterial lens and studying the electric field intensity inside it. My geometry consists of vertical alternating layers of two different...
View ArticleFinite-width excitation source
Dear users, I would like to define a plane wave source which does not extend throughout the entire computational domain. In order to do it, I start with a square air box embedded into a larger square...
View Articlepotential of an trapezoidal cross section cantilever
sir i got some problem regarding potential and i didn't even get any voltage i got 0 v in every frequency. i m working in frequancy domain. i have completed all the work but i could not stimulate and i...
View ArticleSimulation Based on previous simulation results
I am working on an RF MEMS Switch, I used electromechanics physics and got its results. Now I want to simulate its RF Performance using Electromagnetic Waves, Frequency Domain physics, but based on the...
View Articlecarrier generation due to illumination
Hi everyone, I need to simulate a structure (that is attached). I searching for sketching the excess carriers that are generated where the light radiation is on vs. x-axis (at steady state). I tried to...
View Articleplasmonics
hi everyone, i have simulated MIM wave guide (air, gold) at wavelength 650nm using Comsol 5.2. coupling between 2 wave guides which are placed at a distance of 20nm is expected. SPP is propagating from...
View ArticleHow to simulate a lumped port with thickness?
Hello, I've been trying to simulate a rectangular dipole, but I want to simulate with lumped port and it has thickness. I simulated using work plane and a lumped port without thickness, but the...
View ArticleNaN or Inf found when solving linear system using SOR in RF Module
Hi everyone, I am trying to simulate S parameters of a coplanar waveguide resonator between two lumped ports in RF Module, where frequency domain study is chosen. However, when I run the computation,...
View ArticleTorque through Maxwell Stress Tensor
Dear all: Recently I tried to implement a similar problem to the one presented in the following poster. The goal is to obtain the force and the torque over a particle that is illuminated by an...
View Articleboundary condition
Hello every body. i want to calculate transmission spectrum of finite 2D photonic crystal. I used scattering matrix method and port boundary condition, but i do not know which boundary condition is...
View ArticleComsol Exporting all Parametric Solutions to Data File
I am using Comsol 5.1 on Windows 7 64-bit and solving for the modes of a waveguide using the RF module with parameter sweep(over wavelength) before Mode Analysis study. Is it possible to extract all...
View Articlework out temperature inside material where is deposited on a waveguide
Dear All Very sorry to bother you regarding my comsol model. The structure of my device is shown in the attachment. I've deposited an absorptive material (the thickness of the film is around 30 nm) on...
View ArticlePN optical modulator
Hello, I am a student in TUD and I have started to work with COMSOL. My task is to model and simulate PN silicon optical modulator. I am using Semiconductor module. I have couple of questions I would...
View Articletime scale issue when using optical pulse
Dear All Now I have an optical pulse which lasts a few of micro seconds, while the peak occurs at a few of femto seconds after onset of the pulse. Temperature reaches a high value at the peak and...
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