moisture graphics in microwave heating
Hi I'm new in COMSOL and i'm using RF module for to work in a process of drying through microwave heating and I would like to measure the moisture before and after drying, but i not found any function...
View ArticleModeling graphene to use Electromagnetic Wave
Hi, I want simulate a nano dipole of graphene. I tried to simulate use "wave equation" and put the electrical condutivity of graphene there, but it's not working! I need help, please! Thanks!
View ArticleProblems with far-field calculation in diffraction grating simulation
Hello! Thank you for your time and patience to have a look at my question! I am trying to simulate MEMS diffraction grating with COMSOL RF module and I have a problem with far-field domain calculation....
View Articlewhy does "Undefined value found in the stiffness matrix" means?
I'm trying to simulate Photonic crystal. As far as I know, there is no need for me to know the stiffness of material in the crystal. However, when I click "compute", comsol always screen error message...
View ArticleSearch for modes around... in Mode Analysis (RF module)
Hello, I'm trying to obtain the dispersion relation of a graphene waveguide which I previously analyzed via Matlab and on paper. In order to do this I set up a parametric sweep on frequency (angular...
View Articlefreaction of epsilon*mod(E)^2 calculation
I'm calculating eigenfrequencies of a PCF with a defect (core). For a trapped mode within the defect, how to calculate fraction of electric field energy (epsilon*|E|^2) in core? How to introduce...
View ArticleHow to add two materials in one Geometry
With Respect; I am working on a project, and want to add two to three materials, in one geometry.... Can toy tell me, how to do so? Thanks. -- Danish
View ArticleHelp using the optimization module in comsol 5.0
Hey everyone, I'm trying to use the optimization module in comsol but can't seem to find a good documentation of the code for expression for comsol (5.0). What I want is simple I want to maximize the...
View ArticleOpen boundary condition for time-dependent EM simulations
Well, as the title indicates, I would like to know how to model in COMSOL an open boundary condition for EM simulations, using the transient solver. An open boundary condition is the one which absorbs...
View ArticleSimulating chiral media
Hi, I am trying to simulate chiral media as explained in "alphard.ethz.ch/hafner/Workshop/Comsol2009.pdf". My understanding of adding the chiral expression for the electric displacement is that I add a...
View ArticleVirtual Family (Anatomical Models for Electromagnetic Exposure)
Does anyone have experience with the Virtual Family models:www.itis.ethz.ch/services/anatomical-models/overview/ They are human anatomical models developed for the evaluation of electromagnetic...
View ArticlePower in or Power deposited
Hi, I dont quite understand the difference between power input and power deposited in the Electromagnetic ports section. I am interested in simulating the laser irradiation of plasmonic arrays, hence I...
View ArticleRF + Optimization module
Hi, I want to use the optimization module to optimize the geometrical parameters of a waveguide. After each iteration, a merit function defined as the difference between the effective index of the...
View ArticleRF source modeling
Hi, I am trying to model an RF transmitter that I am using to harvest energy in a project. The transmitter is from, powercast and the model number is TX91501. The only electrical specifications that...
View ArticlePML Reflections in Water
Dear COMSOL Support, We are attempting to perform a scattering simulation of a 2D plane wave in water in the RF module. To test the background wave, we simulate an empty space surrounded by a square...
View ArticleImported Patch Antenna Geometry
Hi, I have exported a patch antenna geometry which is designed in Solidworks. I have already checked/compared the boundary conditions many times with the working model which has a flat and simple...
View ArticleEigen-frequency analysis of metal grating
Dear all, For a metal grating (see attached Structure_Reference.jpg), now I would like to analysis the dispersion relationship of surface plasmon wave supported by a metal grating, which propagates...
View ArticleThin Film Transmission Line - RF
I am trying to model the scattering parameters for CPW and Microstrip transmission at microwave frequencies using the RF package. The issue I am running into is my lines are very thin in comparison to...
View ArticleProblem with Large domain
Hi I am simulating propagation through a simple waveguide in 3D. The simulation is working perfectly as long as the length of the waveguide is below 10um. When I increase the device length to 10um, the...
View ArticleConcave Workplane / Concave Geometry
Hi, Do you know if there is a way in order to draw attached geometries in COMSOL? Or any idea if I am able to create a concave workplane? Thanks in advance.
View Article