What's the difference between the "harmonic propagation" and "scattered...
Dear all: IN the RF => In plane wave model ,What's the difference between the "harmonic propagation" and "scattered harmonic propagation"? Q2. if I set the square and draw the rectangle around the...
View Articlephotonic crystal fiber
Hi, I am a beginner of comsol v 4. I tried to design a pcf with hexagonal pattern of airholes (five rings). pitch=2um and d=1 um. I got real part of effective mode index but don't get any imaginary...
View Articleconfinement loss
Hi is imaginary part of refractive index could be positive or negative that means 1.028175433939737e-19 or -1.028175433939737e-19. I found in my simulation positive and negative values for different...
View Articleparameters names must not be empty
Hey, again, this is an error I ha with comsol 4.3: parameters names must not be empty I need a quick help attached is my comsol file, you just need to run it and see the error. and also i attached a...
View ArticleRecovering desired eigenfrequencies
Hi, I'm performing an eigenfrequency analysis of a model in the Comsol 4.3a RF module. My problem is that, though I ask for only 1 eigenfrequency, Comsol ALWAYS gives me 2 eigenfrequencies: one purely...
View ArticlePhotonic crystal fiber
I am trying to model a photonic crystal fiber with liquid crystal filled holes.. I am a starter and it would be really helpful if any one can help me regarding the resources from where i can learn the...
View Article2 Separate Stranded Coils in Multi-Turn Coil Domain
Hi all, I have 2 separate stranded coils to be modeled for transient behavior (Current Pulse input). Since these coils are not of regular shape (linear or Circular), i had to go with numeric coil type...
View Articlesolid core photonic crystal fibers
hai. Iam doing research on solid core photonic crystal fibers I have doubt in calculating mode field diameter and confinement loss of solid core photonic crystal fiber Presently doing simulation using...
View ArticleHow to add a condition on the mode solver when using the parametric sweep?
Hi, I am using the RF module of COMSOL 4.3b to determine the effective refractive index of the modes of a waveguide as a function of the wavelength (for instance between 600 and 700 nm). I am therefore...
View ArticleComments on an old topics
Dear Ruud, I have a question about one of your reply on an old topic:www.comsol.es/community/forums/general/thread/16346/ I also want my solver to use the previous result to calcule the next one, but...
View Articlehow to fix port boundary shown as "not applicable"
hi, I am a student studying COMSOL in Korea. I have a problem to model a electromagnetic waves, frequency domain. The problem is that I can only choose Port boundary as the outside boundary. In...
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 ArticleQuestion on a thermal lens
I have encountered a problem. I put a silicon glass slab exposed under a Gauss beam. Air cooling is added. For the first step I used RF to see how the light transmitting through the slab, which is...
View ArticleGhost domain, bug?
I have a curious problem with Comsol (4.3b and 4.4) with ghost domains. If i look at the geometry and select all domains, i have, ie 10 domains. When assigning materials, then the 11th domain appears...
View Article1D rcs plot of a cylinder with respect to aspect angle
I have simulated rcs of a perfectly conducting cylinder. Results are shown in polar plots & also in 3D plots. But in case of 1D plot i am unsure about the rcs expression for the y axis parameter. I...
View Articleoptical properties versus chemical composition
Dear All, I want to know how Comsol can predict the optical properties of materials versus chemical composition? does Comsol have this capability? If yes, which Madule I have to use. Thank you very...
View ArticleHow do I retrieve cross- and co-polarization T/R data from heterogeneous...
COMSOL'ers: I have a complex periodic array structure (dipole on substrate on ground plane) illuminated by an oblique plane wave. If I were to define an incidence plane (say x-z plane) and launch a TM...
View ArticleLimit number of eigenfrequency solved for
Hi, In my optimization process, I would like to maximize one cavity mode's quality factor. But since there is a neighbor mode has higher quality factor. Comsol always optimizes the neighbor mode...
View ArticleSingular matrix error occurred
I am finding eigen frequency of two helical coils for wireless electricity. every thing is goes well: geometry, materials,Electromagnetic Waves- Frequency Domain & Mesh . But when I compute,...
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