RF module or Wave Optics ??
Hi, I am trying to simulate the wavelength/ frequency transmission and reflection of a nanoscale cross-dipole antenna on a dielectric substrate. For this I have taken the approach of the RF module...
View ArticleEquation editing in Structural physics in Comsol 4.0
Hi Everyone, I was exploring comsol 4.0. I found that the GUI is good but some functionalities in 3.5a are removed. I wanted to edit the Structural physics equation system to suit my PDE. In comsol...
View ArticleMesh the volume between two mapped surfaces
Hello, Is there any way to generate volume elements between two mapped surfaces? Please, find the minimal simulation file attached. In the end I would like to have one domain (the inner block) meshed...
View Articlemode analysis question
Hi All, Recently I am trying to setup a model that can find the waveguide mode that we expected to exist in a special geometry (which has been illustrated in the ppt file). basically, the upper space...
View Articleabout the pml
Hi, Sergei, How are you. I looked over the discussion forum and found a lot of helpful instruction from you, and I was wondering if you can help me out on one of my models that bother me for a while. I...
View Article2D geometry but illuminated from below
Hi, I want to create a 2D geometry but illuminate it from below, or out of plane, with a plane wave. Whenever I try and set the Background Field as exp(-i*emw.k0*z) (in x direction) I get errors as it...
View ArticleElectric Field from a point source
Hi, I am new to COMSOL. I want to model a point source from which Electric Field spreads out in x,y directions. I am working in 2D plane. I started of by creating a geometry with air, and then...
View ArticleElectric circuit Node naming
Hi I do not understand the concept of node naming in Electric circuit. I know that we need External I vs U and External U vs I to connect the external circuit but the node naming is very confusing. If...
View ArticleHow to calculate forward Scattering cross section of infinite 2d array
I want to calculate forward scattering cross section of 2d infinite array. I know how to calculate total scattering cross section, but for forward scattering cross section i am confused. Can someone...
View ArticleHow to give unpolarized light in comsol??
I want to simulate the scattering phenomena through nano rod by incident un-polarized light. Can anyone tell me how to incident un-polarized light in comsol ???
View ArticlePlasmonic Resonance of Gold Nanoparticle
Hi all, I'm trying to model the plasmonic response of a gold nanoparticle in the presence of an electric field. I've got a model of a Au nanoparticle in a circular domain surrounded by PML layer and...
View ArticleUsing interpolation functions to define material properties
The following example from the model library models absorbed radiation in the human head:www.comsol.com/model/absorbed-...on-sar-in-the-human-brain-2190 Rather than directly representing each subdomain...
View ArticleS- parameter calculation
I'm studying a photonic crystal slab where S11 and S21 parameters are to be calculated. The slab has PMC boundaries. I've used two ports but each error message comes stating "returning undefined value...
View ArticleHow to calculate Jones matrix of nanosphere ?
Hello everyone I want to calculate the jones matrix of nanosphere. For calculating the jones matrix i am thinking the following procedure: 1) First i will incident x-polarized light then i will record...
View Articlecoplanar wave guide
I have questions: 1. How to put tensor of magnetic permeability in comsol for RF module. 2. I am designing some model attached in pfd here, how should i connect so that my wave travel from port1...
View ArticleRF design
Hi, I am designing some model which i attacted here in the pdf, will you please tell me how to make the ports in a way so that my wave flow from port1-metal1-port2-metal2. Can i choose port as lumped...
View Articlesemiconductor device simultion in comsol multiphysics
is that possible to simulate a MOSFET for 65/45/32nm technology node like we can do in other TCAD softwares. if possible then how to set this process parameter or we have to add libraries.
View ArticleVery different results from v44 and v42a
Dear all, I built a model in COMSOL42a before and obtained reasonable results then. Now I try to update to COMSOL44. I understand there might be some change between these two versions, but I don't...
View ArticleAnallytical function in COMSOL
Hi Ivar, I have a difficulty defining an analytical funcyion as a function of frequency. the frequency is going to sweep so the function should sweep too. I have the following form for my function. E...
View ArticleHow to calculate Electric field at arbitrary point
Hello Everyone... I have designed a model in which light is scattered by a gold nano particles. Now i want to calculate the value of scattered electric field at any arbitrary point. Can anyone tell me...
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