How 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 Articlehow to excite a plane wave in comsol
Guys: Anybody know how to excite a plane wave excitation in COMSOL? Really appreciate it Best Meng
View ArticlePlane Wave in a Cube
Hi All I want to create a perfect plane wave in COMSOL. I draw a cube and assign "plane wave radiation" to one side of it and "PML" to aother sides of cube. But instead of having "plane wave" I am...
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 ArticleOptical absorption in MIM or MSM plasmonic structure
Hello, I am studying the plasmonic effects on Metal-Si(SiO2)-Metal structure . I try to calculate the total optical absorption (1/m) on the surface of the structure using the Total Power Dissipation...
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 ArticleSimulating 2D optical waveguide
Hi, I am simulating a 2D optical waveguide for both TE and TM modes. For TE waves I get reasonable result by setting the cladding core interface as perfect electric conductor. I use excitation port...
View Articlehow to excite a plane wave in comsol
Guys: Anybody know how to excite a plane wave excitation in COMSOL? Really appreciate it Best Meng
View ArticlePlane Wave in a Cube
Hi All I want to create a perfect plane wave in COMSOL. I draw a cube and assign "plane wave radiation" to one side of it and "PML" to aother sides of cube. But instead of having "plane wave" I am...
View ArticleConvergence: when should I stop the model?
Hi everyone I have been working on models that take several days to solve. One of them is running at the moment, and I just have a general question. When I look at the Convergence Plot 2, which is...
View ArticleMulti-Port S-parameter Calculation Simultaneously
Hi, Is Comsol able to calculate the S-parameters of multiports in s single computing ? For example, if i want to know s11 s21, s12 and s22 , i have to first set port 1 on port 2 off and compute to get...
View Articleinduced charge density
Hello everyone, I am working with the RF module of the Comsol 4.3b version. I am trying to calculated the dipole moments (px, py, pz) of a split ring resonator (SRR) illuminated by a plane wave. For...
View ArticleWhy set the conductivity as zero?
Hello everyone. Here is another question about "scattering_nanosphere". In this model, the conductivity of nanosphere (composed of Au) was set as 0. But its true value should be 45.6E6[S/m]. If we use...
View ArticlePatch antenna with a coat of Microwave absorber
Hi, I am studying the improvement in absorption of radiation by microstrip patch antenna, which is coated with a layer of microwave absorber that I am going to develop. How can I define the physics for...
View ArticleMesh size and dimension of the structure
Hi Guys, I am quite new in COMSOL, and I have three small questions about the setting of the mesh in ewfd, frequency domain study. 1. I found the results will be different if I used different size of...
View Articletime dependent EM-fields in cavity
Hi! First of I apologize in advance for any stupid questions but I'm a new COMSOL user and would like to model the field inside a resonator. This is no problem in the frequency domain but when I try to...
View Article