how to reduce reflection of TE wave in 2D in 4.4?
Hi, I am working on a rectangular structure, where I've created a PML boundary condition on all the four sides of the rectangle by creating a layer on its all sides. Also, inside it I've created a...
View ArticleSimulating S and P Polarised EM Waves
I am trying to simulate a plane wave with either S or P polarisation incident upon a nanoparticle on a substrate at various angle of incidence (phi and theta). Following the Scatterer on a Substrate...
View ArticleLumped Capacitor in the RF Module, eigenfrequency
Hello all, I'm using 4.4, and I realize it is impossible to add Lumped Capacitor and Lumped Inductor in RF Module Eigenfrequency study. (but lumped elements with Z value is possible, and Lumped...
View ArticleSuperconductor in RF module
Hi all, Is there a simple way to define a superconductor material and directly assign it to a boundary in emw simulations? I saw some papers using PEC instead of a real superconductor but I'm not sure...
View Articlefrequency domain study of a heat transfer model
Hi everyone. I am new to comsol, it would be appreciated if someone helps me. I want a frequency domain study analysis of a heat transfer model. Is there an easy way in comsol to do this.? Basically I...
View Article"error: solnum out of range" RF module, mode analysis
Hi, I am doing a mode analysis for a plasmonic waveguide, now, when i am trying to open the file, the whole loading process of opening the model is done, then a message appears that tell me that...
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 ArticleSlit conditions error
Hi Everyone. I am working on Dielectric Resonator Antenna in Comsol 4.4. When I complete my design and try to compute, it always has an error. "The slit condition should be applied only on an interior...
View Articleextract the eigenvalue from Mode analysis via Matlab code
Hi, I know in version 3.5, use "fem.sol.lambda" to extract the eigenvalues. But I suffered a problem in version 5.0. How to extract the effective mode index or eigenvalues in version 5.0 with Matlab...
View ArticleCircular port excitation fails with piecewise stacked circular waveguide
Based on the "h bend waveguide 3d" model in version 4.3b I try to simulate a dielectic loaded circular waveguide geometry. The waveguide consists of three cylinders with identical inner diameter and...
View Articleeffect of temperature on antenna radiation pattern
Hi Everyone. I have a Dielectric Resonator antenna. I have its radiation pattern and gain. Now I want to set dielectric block temperature to some degrees, say 50degC. And now I want to check its...
View ArticleBehavior at Axis of Symmetry
I am simulating a 25 nm radius gold wire in a dielectric cladding. I am measuring the characteristic impedance of the mode of the wire. I have run it in both 2-D axisymmetric and in eigenmode analysis....
View ArticleHow to plot quantum efficiency
Hi all, I'm a new COMSOL 4.4 user. For my master study I'm trying to learn RF module applications in COMSOL. My topic is quantum well infrared detectors with prism and pyramid geometry. I have...
View ArticleConvergence problem in time dependent solver
Hi, I'm getting this error when running a time dependent simulation of laminar flow in a micro channel. What I want to do is change the input flow on one arm of a y-channel and follow the response in...
View ArticlePlasmonic Wire Grating Not Working
I followed the steps in the plasmonic wire grating tutorial for COMSOL 4.2. When I try to compute the results it says it has encountered a problem with stationary solver 1(sol1/s1) and Failed to...
View Articlesweep + Values of variables not solved for
I have a model which consists of two studies: - Study 1 : Stationary with parametric sweep of parameter A - Study 2 : Eigenmode, with parametric sweep of A, the result of Study 1 is the input for Study...
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 ArticleHow to set up the port?
Dear all, I use RF module constructing 2 models, which have same structures except the length. The input power and other parameters are also the same. But after simulation, the power at the incident...
View ArticleLumped Capacitor in the RF Module, eigenfrequency
Hello all, I'm using 4.4, and I realize it is impossible to add Lumped Capacitor and Lumped Inductor in RF Module Eigenfrequency study. (but lumped elements with Z value is possible, and Lumped...
View ArticleSuperconductor in RF module
Hi all, Is there a simple way to define a superconductor material and directly assign it to a boundary in emw simulations? I saw some papers using PEC instead of a real superconductor but I'm not sure...
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