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11 Threads found on edaboard.com: Poor Convergence
Hello, I am simulating a 2-18 GHz cavity backed spiral antenna in HFSS but I am getting these warnings (mentioned below) in fast sweep when I decrease the spiral arm width to anything below 0.25 mm. I have searched alot on google and HFSS guides but there is nothing on these warnings. How can i remove this warning message and what do these war
I am getting following error in one of my simulation- Fast sweep setup, process hf3d: poor convergence in computing port dispersion I require help to understand the following- 1)What is port dispersion? 2)How it effects the result? 3)How to correct it? Thanks Abhishek
Hi, guys. I have a question about HFSS eigen-analysis convergence. For my analyzed structure, since I used Master-Slave boundary condition, it seems the frequency convergence is pretty poor. Some time it reaches theoretical value in one pass but divergence to a weired number in the next one.... So are there any good methods to (...)
Anyone knows the term of 'non-converged solutions' and 'meshing' in HFSS? What does it mean by 'poor meshing'? How to measure how poor it is and then how to improve it? Thanks so much zahril You can read a book: Swanson D., Hoefer W., Microwave Circuit Modeling using Electromagnetic Field Simulation, 2003 There
My work is on implicit FDTD method which allows time step (delta_t) above CFL limit. Implicit methods require one to solve a large sparse matrix. If delta_t is increased the the solution of this sparse matrix becomes slower. I can see this when I do the simulation with the implicit scheme. But my query is about mathematical explanation of what
My work is on implicit FDTD method which allows time step (delta_t) above CFL limit. Implicit methods require one to solve a large sparse matrix. If delta_t is increased the the solution of this sparse matrix becomes slower. I can see this when I do the simulation with the implicit scheme. But my query is about mathematical explanation of what h
I use CST MICROWAVE STUDIO 2008.... (sorry .. my english is poor) There is a aperture of nano-size on the surface of the metal(gold) and we emission the plane wave foward to the aperture and observe the Power flow distribution. (frequency : 309Thz , wavelength : 970nm ) This is what I simulate now... Not error is occured but the re
Fast sweep setup, process hf3d: poor convergence in computing port dispersion. this is a warning i have some questions about: 1. what does it refer to? 2. what is "port dispersion"? 3. how can i control or determine the properties of this convergence? 4. to what level this error may effect my results?
hi, ansoft guies: There is one simple question about HFSS. Since Adaptive 'Single frequency' analysis will allow users to setup 'Requested Passes', what number will be suitable? I used 7. However, issues come up! The results,obtained by 'Single Frequency', differs greatly from 'Sweep' analysis results? Because of the higher acc
Two comments: - You can't drive a NMOS-FET this way. It needs 5 to 10 V Vgs to turn it on. Switchers with NMOS output stage typically use a bootstrap circuit to drive the FET. Consult existing circuit examples. - A buck converter with unregulated PWM gives very poor output voltage stability. With no load, the output voltage rises up to the
I am using a metamaterial as superstate to enhance gain of antenna.When i use 10 pass with center frequency 2.5 GHz for the frequency range of 1-3 GHz using fast sweep i got good result.But when i use 10 pass with center frequency 2 GHz for same frequency range of 1-3 GHz i got poor both the cases HFSS shows that convergence criteria i