frequency 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 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 ArticleEffect of one physics in another physics
Hi Everyone. I want to ask a question about physics coupling. My question is , how to see the effect of one physics in another physics. For example, I want to see the heat transfer effect in Radio...
View ArticleCoupling Heat Transfer w/ RF Module
Hi I am wondering if it is possible to use the RF module as a heating source, similar to the tutorial model that uses joule heating. I am attempting to do so, but I keep running in to this error....
View ArticleVery Urgent: Piezoelectric Filter Lumped Port Problem
Hi I am trying to find the s parameters of a mechanically coupled piezoelectric filter with lumped port. But even though I have defined the perfect conductor, I get this error: Errors during...
View ArticleSimple 3D Plane Wave (RF module)
Dear Community, As a first step to a more complex problem, I would like to model a simple 3D electromagnetic plane wave. To do so I tried the following: - draw a simple box, set material as air -...
View ArticleHow to couple multiple physics
Hello, I have a big issue when I try to model harmonic generation in plasmonic nanoantennas with the RF module. But this can be a general issue when you must couple multiple physics. I am simulating...
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 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 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...
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