coupling of two physics
Hi guys My simulation has two physics in it. The second physics is piezoelectric and I am trying to apply the line integral of the dependent variable from the first physics as the input to the Voltage...
View Articleinfinite integral to calculate trapping potential
hi, I am calculating trapping potential by optical trapping integral. In my model, the focused light is incident into sharp gold substrate, thus the huge enhanced electric field causes the optical...
View ArticleReflection Calculation in Scatterer on Substrate Example
Hi all, I am doing a simulation similar to the scatterer on substrate example. My substrate I Si and my scatterer is Ga in frequency range of between 480 THz and 880 THz. I would like to calculate...
View Articlebasic electromagnetics question
Hi everyone In one of my simulations I need to find the electric potential (voltage) on a flat metal surface (negligible thickness) under a normal incident em-wave. The em-wave is polarized in the x...
View ArticleOptical trapping potential
hi, I am calculating trapping potential by optical trapping integral. In my model, the focused light is incident into sharp gold substrate, thus the huge enhanced electric field causes the optical...
View Article(Solved) unable to put 3d patch antenna on top of 3d substrate with ground plane
Hi Guys, A few weeks ago i posted a topic similar to this one where I couldnt find out how to simulate a 3D patch antenna "on top" of a 3D substrate having a different material than its substrate,...
View ArticleS-Parameter of 1-Port Network
Hi at all, I need a first advice how to define a one-port network in Comsol to simulate the reflection coefficient S11. Consider a thin film resistor (or micro strip) on a substrate. Both ends are...
View ArticleDraw line on point graph
I'm new to comsol and I'm currently processing the data that I have received from a 2D cut point. However, I'm having some trouble trying to add a line that connects each point on the point graph that...
View ArticlePML Boundary Implenation Problem To Calculate Reflection
Hi, I am trying to simulate a 2D structure composed of Air and a substrate (n = 17/3). Bothe materials are semiinfinite. The propagation direction is y. I use scattered field formalism as solve for. My...
View ArticleHelp: PML Scaling Factor and Implemantation In RF Module
Dear All, Can somebody tell me what is PML scaling factor and curvature parameter in PML of RF 4.4? I am going to sweep a large frequency range 4.8e14-8.8e14 in my simulation. The structure is easy....
View ArticleMaxwell stress tensor integration
Hi everyone! I'm still trying to compare the electrostatic force calculated by the expression (F=0.5*epsilon*V^2*A/g^2) with the result coming by Maxwell stress tensor in COMSOL. I used the suggestion...
View ArticlePeriodic Boundary Settings in RF Module
Hi, I do not know how I should do setting for k vector of Floquet periodicity. What is KF in user defined menu tab of "k vector for Floquet periodicity"? Does it show the direction of periodicity? Let...
View ArticleDoes Somebody have experience in PML for Electromagnetic?
Hi, Please let me know if you guys already worked with PML in RF module. I am doing a very simple structure but I can not implement PML for a long time. Thanks, Mohammad
View ArticleScattered field problems with oblique incident plane waves
Hi I need to simulate a square array of nanoparticles placed on top of a substrate and illuminated by a non normally impinging plane wave. The problem should be solved in a straightforward way in...
View ArticleDirectional Coupler
I am trying to model a directional coupler in 2D. I get the following error Undefined value found. - Detail: Undefined value found in the equation residual vector. There are 1 degrees of freedom giving...
View ArticleWaht is Background Electric Field?
Hi Guys, I can not understand the meaning of background electric field. In scattered field solution, one has to specify background electric field. What does it mean? What is the difference between Full...
View ArticleTime Complexity of Comsol for Cluster Computing and Queue jobs
Dear All, Does anybody know, what time complexity, Comsol have? About time complexity I would like to say that: let say you have a model with n1 elements. It takes t1 seconds to run. If you use 1000*n1...
View ArticleIn transient time domain analysis, is there any way to visualize 2D E-field...
Dear Friends, Your comments regarding my concern is highly appreciated. Please take a look. My concern is: In transient time domain analysis, is there any way to visualize 2D E-field of a selected...
View ArticleSingular Matrix, Void Equations, Scatterer on Substrate
Hi, I am trying to simulate 'scattering on substrate' example in RF module. My model is a little bit modified. It is so simple 3D structure, just air and Si. My study node has two steps. The first step...
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