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56 Threads found on Optimization Hfss
Dear all, I am a beginner. I need some opinion/help. Here is my situation. I am designing a transformer matching network (TMN) for a PA. I do not have ADS PDK but working in CADENCE PDK. My question is do I have to design layout in CADENCE then export gds file to E.M software such as hfss/ADS momentum for electromagnetic simulation and
Can you explain further what you mean when you say optimization?
Dear all I'm try to simulate a branch line couple in frequency band between 10.5-11.3 GHZ on substrate Rogers (h=0.508mm). the problem I have is that after optimization I can not get the -3dB amplitude in both port 3 and 2. the results are indicated in attachment. can anyone help me to find the solution? any support from you will be appreciated
Hi I couldn't find out what kind of parameter delta is, but you can define the delta in project variables and then use it in optimization.
For CRLH unit cell length optimization, which parameter i must select.. And also provide me with some examples for deeper insight
Hi all I designed a planar antenna that would be a unit cell for a 4×4 phased array. My PC resources are limited and I want to know what configuration i may use in order to speed out simulation and optimization of the array's parameters.
Hi everybody, I am having a project about "optimization for antenna using hfss simulation through hfss API". My trouble is now when i export data under Excel or Matlab table from hfss result, i dont have any idea to analyze these file in Matlab, such as S11 plot, i dont have idea how to make matlab understand what value of (...)
Hi everybody, My name is Ngoc, I am the third year student at Ha Noi University of Science and Technology in Vietnam. I am having a project about "optimization for antenna using hfss simulation through hfss API". My trouble is now when i export data under Excel or Matlab table from hfss result, i dont have any idea to (...)
Hi everybody, I'm haveing project about antenna optimization by Genetic Algorithm. My trouble now is that can't linking between hfss and MatLab. If anyone know it, please guide me what i need to do now? Thank you so much!
Hello, I am trying to write script that creates an output variable that can be use as a goal function in an optimization routine for pattern synthesis. I have a hard time putting all this together (either hfss or Designer). Some questions: 1. can the desired pattern be an array defined by in imported series of points?
There are two questions here: 1) We know that it is easy to determine the 10-dB bandwidth by using the XWidthAtYVal(-10) function in the simulated return-loss plot. Thus when I try to achieve a 10-dB bandwidth larger than 50 MHz, I set an optimization goal like XWidthAtYVal(dB(S(1,1)),-10)>=50e6. Everything goes OK until the second iteration where
"Hi , I am just beginning to use ansys-hfss to design a circular waveguide and I would optmize its dimensions to get the S-parameter i want. Is it possible to do that without groping along ? Something similar to the optmization on ADS maybe... Thank's for your help," ... I did find how to do an optimization. But it says that my
My computer is Win7(64bit) 16G RAM For the same filter. 1. when I do simulation, the ram will increase to more than 10G, and the simulation is ok, no error. 2. But when I do the optimization, after several iteration, hfss will stop appearing "out of memory". And I found that in task manager: hfss.exe(*32) took RAM about 3900 MB. (...)
1. "?plot filed? options are gray, why? " you forgot to save them, or you started an optimization sequence which can not be plot. Try to solve CW only once to see the port distribution. In my experience, making a non-obj. cross-section and plotting vector fields there gives more information. 2. Seems, Zo is not that is told in the help. I bel
i am a beginer on hfss tool and i am ... i am not getting exact value we have take for the corporate feed network so plz tell me how 2 design a corporate feed network for 2*2 array patch ..plz plz do help me... and i am facing problems in optimization also so plz help me
Hi How can one view updated results while optimization is being carried out by hfss? I mean as the hfss simulates for certain change(s) in optimizable variable(s) (during optimization process), how can one view intermediate results of that simulation(s)? Thanks in Advance! Vivs
h i every one while i am working on my design in hfss especially in optimization, i get error after analyze said that optimization Analysis failed - Initial value is infeasible what they mean with initial value....
I am designing a tri band antenna in hfss but having problem with third dip which is at - 4ddB .... how ca i optimize it to get s11 below -10dB geometry is attached
How to set up the Goal in optimization setup in hfss in this case: the antenna is on xy plane, i want to find the value of a variable so that the antenna is Omnidirectional in yz plane I don't know how to set up the goal, the condition.. in optimization setup menu Thank you very much!
Respected all, Hello. I am designing a stacked and slotted antenna using IE3D. the same structure when i simulated with FEM based hfss, gave me four resonances, the result of IE3D is also giving me four resonant points, but the problem is that the RL at two of the four frequencies is less than (above) -10dB. So i decided to assign the probe fee
I would like to contact someone with experience in CST studio (or hfss, Ansoft Designer) for antenna simulation and optimization. Anyone interested in freelancing for CST studio? Cortes.
u can use hfss GA for your aim and if u want u can load hfss with matlab in each part of your GA matlab can call the hfss for optimization and i cant understand what do u mean by telling the relation of s parameter and GA ????
is possible to import 3D models from Solidworks (or PRO/E or CATIA) in hfss and/or CST and modify it for optimization? (optimetrics in hfss)? Thanks
Deborah, Please see attached file. This was a Yagi-Uda antenna array I put together for optimization but never got around to it. The Yagi_uda is driven by a folded dipole antenna which was optimized in its own design in the file for the given frequency. Have Fun
Hi all, I want to optimize a waveguide to coax adapter. If I want to get minimum return losses at a certain frequency, what should be the goal and calculation (mag of S11 or dB S11) in optimization Setup? Thanks in Advance
can anyone help me exporting field data from hfss i know there are several threads similar but here i have a different problem i need to export field data (actually current density) to matlab but i need to work with variables im making optimization for an antenna structure and the optimization in made in matlab i want somehow (...)
hi oh1,,, I hope you had an answer to your question, because i am having the same problem. CST MWS (2009) for some reason would not permits you to specify less than 3 samples for optimization of a single variable!!! regards
thanks vinoth. i will send u private message if i have any problem. ---------- Post added at 23:05 ---------- Previous post was at 21:55 ---------- @vinoth. can u please tell me exactly how to do this? i was unable to 'add optimization'.
Where is it possible to find more details about the optimizers which are available in hfss? For example, one of the optimizers is the pattern search optimizer, however where can I find out which exactly pattern search optimization method is utilized etc?
I have draw a model of a FET with a silicon layer, bulk oxide, metal, etc. In addition, I have drawn wires which run to contact pads which connect to the source, drain, and gate of the FET. I have excited this model with an incident plane wave of say, 1 V/m. I am trying to find a way to arrange the wires and contact pads in such a way that I g
Whenever I have two or more cost functions in optimization setup, my simulation ends after one variation. For example, if I want to set a cost function for S11, and another one for S21, optimization fails. Whatever design structure I have, I never got it to work. Could anybody help? Sounds weird to me.... Try the follow
Dear all, i need 2 sample hfss projects 1. PBG structure in microstrip patch antenna design. 2. EBG structure in microstrip patch antenna design. hfss file, documentation or EDABoard related link is highly expected. Plz help me. In addition, i successfully implement GA optimization in patch antenna(snpatch) by SuperNEC 2.9. If (...)
Have tried couple of days to design a circulator with 2 transformer sections in each branch, but never successful. 2 transformers could provide 3 reflection poles, thus could much improve the bandwidth. I even tried hfss optimization, but at the end, it only gave me the response similar to one transformer circulator (2 reflection poles) Has a
I need hfss tutorial for designing and optimization of Quad Helix. Highlight another software for such task as I feel difficult to do this in EZNEC Regards Adeel
Greetings, I need to optimize my structure in hfss to get the best fit between the simulation results and measured one. When, I import the measurement data in hfss and try to make a subtraction from simulation results it seems that hfss does not allow me to do this so. I wonder if you guys to help me to find a solution for this (...)
Hi guys, First time to do the hfss optimization to tune a dielectric filter. I set a goal for S11 in a specific frequency range and acceptable cost is set as 0. Widths of the iris are the tuning variables. The optimization finished much faster than I expected. I thought I had a super good luck that already achieved the 0 cost (...)
Hello, In hfss I need to define a goal function (defined at a certain frequency) that is the absolute value of the difference between s11 and a reference function (which is frequency depended like dB(S(FloquetPort1:1,FloquetPort1:1)). I need to perform the optimization at EACH FREQUENCY IN THE SWEEP, so that that in the "calculation range" box
hello I am in Matlab in a loop where I have to call hfss. I need to: 1. load a project file, 2. change some variables values 3. run the optimization in it 4. export results 5. save project I have this Matlab routine I wrote (mostly guessing) and the hfss test project file attached. Questions: 1. It looks like when the (...)
You might consider looking for a maximum that falls outside the main beam region and use that as the SLL for you optimization. I have not tried this so it is just speculation about what might work. Good Luck. Added after 17 seconds: You might consider looking for a maximum that falls outside the mai
Hello, I am trying to synthesize a radiation pattern. I would like to use a required pattern data set to be able to define an average difference between the required pattern and the calculated pattern as the goal function. Does anyone know how to import external data in hfss and use it this way? Thanks Katto01
HI ! I do GA optimization of EM parameter, by the way what is the method used in CST? It looks like GA!
Hi all, The first time using hfss optimization fuction,and when I edit calculation: AxiaRatio: (procedure:Name:AxiaRatio?Report Type item :?Far Fields??solution item? Setup:LastAdaptive?Category:Axia Ratio?Quantity?AxiaRatioValue??Function:),and add in,but in vain.Can anyone tell me how to solve it? Thank you in advance, [url=h
Hello gvinu4u, For Branchline coupler it is always better to start with Circuit Design tools initial design & optimization & then simulating in Electromagnetic tools for accurate simulation... I recommend AWR Microwave Office (MWO) which has good Microstrip/Stripline models library & integrated layout editor...which also has integreted em sim
do a search in the forum for optimization. don't be lazy.
It is impossible to import any model into hfss from other software for the change of dimensions. You have to build up the model in hfss by parameterization for optimization.
how can make antenna optimization using hfss
Hi, I have a question about designing collinear omni-directional antenna. Right now I want to steer the main beam direction to the horizonal plane, by using hfss optimization. Basically I want to make the gain at theta=90 deg the maximum, so How can I setup the optimization for this purpose? I found that we can setup the far-field (...)
I know that people use this : for inductor optimization. I don't know about importing it into a layout for an IC. I'm not sure if that can be done. But I'm sure the inductor isn't that big so you can create it manually. ADS and hfss are good too, but from what I understand the software abov
Hey everyone... I am trying to get on and off a PCB at about 6GHz with the best S11 I can muster. I have been using a Johnson SMA end launch connector attaching directly to microstrip which has worked reasonably well below 3GHz. Above 4GHz this approach is probably not what I want to do. I have started looking at a CPWG structure at the initial
Dear all, Latest version of hfss/Optimetrics has GA optimization