Waveguide amplitude errors, scattering boundary condition
Hello everyone! I am modeling a waveguide with the purpose of verification, but I am getting high errors in amplitude when the length of the waveguide is not a multiple of the wavelength of the...
View ArticleError occuring while uploding Comsol file in discussion forum
Hello, I am trying to upload Comsol file in discussion forum,but 'file extension error' is occuring while uploading.Please help me for this error.
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 Articleendlessly assembling matrices in transient solver
Hello, after fruitlessly trying almost every possible way to solve a Navier-stokes equation with volumic forces in 3D with very few ram (2GB), and thus putting my software to all the stresses possible,...
View ArticleIs there an easy way to create a high number of geometric components with a...
Hi all, I am using COMSOL 4.3 to simulate a 2D photonic crystal waveguide made of air holes in a dielectric (using the emw study of the RF module), and I wish to look at how roughness around the holes...
View ArticleOscillating electric dipole source Comsol RF module
Dear All, I have question. I do simulations of plasmonic gap nanoantennas, and I want to excite antenna with dipole source which is placed and oscillate in the middle of the gap. I have questions....
View ArticleHow to measure the gain on an antenna in comsol?
Hi Folks, I wanted to know how can i find the gain of an antenna. I am using one of the examples in comsol website, dipole antenna. Here is the link for it:www.comsol.com/model/dipole-antenna-8715 How...
View ArticlePML refractive index
Hi, I am studying a model of Step index fiber and I want to put a cylindrical PML around the core. What should be the refractive index of the PML , should be same as refractive index of the cladding or...
View ArticleHow to determine domain number from a given block name.
Hi I'm currently working with a project where I have to prepare a model to be illuminated in the RF module by microwawes and ultimately being able to determine the location of tumors in human tissue....
View ArticleAbout how to calculate the S-parameters on certain port using line...
Hello, I am doing simulations with RF module. It is about the plasmonic resonance in MIM structures. Actually I would like to use more than one active input ports in my structure. However, when using...
View ArticleHow to mesh very thin films/ layers in MEMS switches? How to make use of...
I want to run electromechanical simulations on MEMS double clamped structure. The problem I am facing is on meshing the thin features in the structure. The top electrode and bottom electrode are each...
View ArticleNegative transmittance in comsol
Hello everyone I am simulating a model for periodic silver sphere for in-plane and out-plane polarization. But when i am plotting the transmittance in case of in-polarization with angle of incident 50...
View ArticleHow to calculate photonic band gap, transmission and reflection spectra?
We want to get photonic band gap, transmission and reflection spectra of 1D or 2D PC. Could you help me how can I obtain band gap and Transmission/Reflection spectra of 1D or 2D photonic crystal? Or...
View ArticleElectromagnetic Force X,Y and Z Component
Hi@All, I have created a simulation of a metal ball in an electromagnetic field of a copper coil. Unfortunately, the forces are that I have not determined correctly (at least I think they are wrong ;)...
View ArticleWhat's the axial boundary condition?
Dear all, I've been using 2D axisymmetric Electromagnetic module. On the axis there's the default axial boundary condition. It's very convenient to use, but there's no way to know what conditions it...
View ArticleQuadrifilar Helix Antenna
Hi! I'm looking to simulate a Quadrifilar Helix Antenna with infinite balun and was hoping that some one either: Done it before or knows how to do it. I have built a model in comsol as seen in the...
View Articlewireless power transmission simulation help.
I am very new in using comsol and have a little knowledge about comsol.I want to simulate wireless power system using comsol 4.3b.If someone give me some direction about how to simulate wireless power...
View ArticleModule Combination
Hi, I am wondering whether I can couple the piezoelectric and RF module, in order to analyze the interaction between piezoelectric response and electromagnetic fields present in the medium?
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