mode analysis, not getting the right neff
Hi: I am solving one file using Comsol 3.5a but I am getting neff to be 3.8. I am supposed to get it 3.88. Can anyone check why my neff does not go higher?. I have been trying for days and the best...
View ArticleSpatial Coordinates as parameter
Hello all, I am attempting to create a structure that continuously changes with height--there are multiple optical fibers, and they increase in size as they get further away from one end of the model....
View Articlewireless power transmission simulation help
dear friend, I am so sorry to bother you. i am fairly new to the comsol software and i am trying to simulate "Magnetic Resonance for Wireless Power Transfer".in this biog ,i found your question and i...
View ArticleHow to excite a Microstrip?
Dear community, i am currently designing a microwave resonator consisting of microstrips. Does anyone know how to put an excitation just along one strip, as in a coax cable without outer conductor? I...
View ArticleCOMSOL 4, TE and TM modes
In previous version of COMSOL (e.g. COMSOL 3.5) it is quite simple to choose TE or TM modes analysis. In the COMSOL 3.5, in the model navigator I can choose "In-Plane waves" or "Perpendicular waves"...
View ArticleMirror plane in 3D
I am working on calculating the E-field distribution for a rectangular 3D geometry. I require a very fine mesh and therefore I run into memory limitations of my computer. I therefore would like to take...
View Articleplease help me
please I need study how to analyse pcf fiber with pml with COMSOL and I just need an example please help me
View ArticleMultiphsics field calculation (DC field and electromagnetic wave)
Do you know how to calculate the transmittance under mutltiphsices fied, such as DC field and electromagnetic wave ? If you have a simulation exampel, could you send to me ? I do appreciate your...
View ArticleRegarding Thermoacoustics
Dear All, I m new user to comsol Multiphysics.. I am studying Thermo-acoustis of tissues in a waveguide in Comsol 4.2..As a heat source i am usimng microwave(i.e. Electromagnetic wave(emw)) for my...
View ArticleRE Symmetry in the EM wave model
Hi, I have been looking through the problem of applying symmetry to the waveguide. (across the height of the waveguide, z-axis) to reduce the computation time . I came across PEC and PMC BCs. I try to...
View ArticleHow to solve the shutdown problem due to "flmklblas.DLL"?
I was running a parametric sweep model with direct solver, and my COMSOL 4.1 keeps shutting down when it goes about 60% of the process. The windows 7 logo says the error is due to "flmklblas.DLL". Does...
View ArticleHow to solve the shutdown problem due to "flmklblas.DLL"?
Dear Ivar Kjelberg, Hi! My name is Shiyi Wang, a PhD student majored in Electro-optics. Your clear response and kind help impress me a lot when I check the solutions on the discussion forum. If...
View Articleconfinnement loss pcf fibers (pml)
hello sir can you help me how to obtain a confinnement loss of pcf fibers with comsol , how to configure the pml
View ArticleBAND GAP ANALYSIS
Hello friends, I am beginner of comsol 3.5a. I have designed Photonic Crystal Waveguide. How can i calculate the parameters. How can i do Band gap analysis. After that, i have to plot PBG diagram....
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 ArticleWorkplane extrusion does not show the fields like seperate domain geometry does
Hi, I have been making my chiral structures using rectangular boxes. These were working fine and I could see fields (EM) inside of the structure as well. I then required the edges to be curved so I...
View ArticleMeshing copper on a PCB
Hi In the RF module I'm trying to do a simulation for a pcb with metal thickness of 18um. The structure is a 2-port filter. The thickness of substrate is 1.27mm. The software simulates the structure...
View Article[How to calculate quality factor] Cylindrical Dielectric Resonator
Dear all, Hi! I am a new one to use COMSOL, currently I want to simulate a simple case - cylindrical dielectric resonator (Reference: Microwave Engineering, 4th ed. David Pozar, Chap 6 Ex 6.5) : I want...
View ArticleAdding geometry, keeping mesh.. Help
Hi everyone! I am pretty new in Comsol world, so I hope you can help me.. I am currently doing some RF-simulations of the electrical field in a 3D setup with different geometries of different...
View Articlecomsol
Sir, i am facing problem in Comsol modelling. I am attaching image of model .Please help me to find the correct solution of spectral image.
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