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Hfss And Lambda

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62 Threads found on edaboard.com: Hfss And Lambda
Hello. I did the design of the antenna with CST, but when I compare with hfss, I get a big difference of the reflection coefficient. What is the problem? Is it the airbox or the port or what?
Hello everyone! I made design of 5 x 5 TEM horns planar array in hfss, and found that there are the great back lobes (comparable -5, -6 dB to the main lobe) in all most frequency range. Element period in array < lambda (min). Has anyone seen this problem before? and how to fix it? I don't know where the back lobes come (...)
hello how could i evaluate S parameters (db S11 and S21 ) Versus Frequency plots in hfss.. regards Bukero
I modeled a microstrip patch antenna in hfss with airbox only lambda by 4 over the patch antenna. The airbox sidewalls and base touched the antenna, so none of the substrate edge scattering ripples are seen in the S11 results. I, then, fabricated the antenna and saw bunch of ripples in the S11 results, though the pattern (...)
I have designed a dual layer differential microstrip antenna .This is my first hfss simulation model and also I am very new to Antenna theory. This was designed based on a research paper . The model is running but the results aren't as they should be. (Like VSWR is highest at working frequency of 900 MHz; real and imaginary part of Z0 are (...)
Hi all i'm going to design an infinitesimal electric dipole above an infinite pec for height lambda/2.I'm going to earn figure 4.17 in antenna book,Balanis but the results aren't good at all.(VSWR and radiation pattern) i don't know how length i need for air gap in infinitesimal dipole?and don't know what is the problem? I'm using (...)
hello can anyone here please upload for me a layout for wilkinson power divider in hfss any design would be OK, i'm new to hfss and want to see how the layout looks like anyway my design is operating at 3GHz with equal P3:P2 lossy with lambda/4 matched Thanks in advance Hi, It's better if you can come with your la
Hy, I am a beginner in antenna propagation and hfss. I have a quesion about the monopole antenna. I fixed my antenna on a cylindrical Cavity build with a NEW material with relative permeabilty 1000. when I valdiate it does not display errors and when I click on analysis at the beginning it works then it stops doing in (...)
Hi friends, I have designed 3 rd order band pass filter in hfss. For short circuit stubs, i used a small cylinderical hole in hfss with radius as 0.4mm. Is there any standard formula or dimension ? Please guide me
1- radiation buondry means the space that you should define as a farfield area and make it as an radiation , so your device can radiate in far field. thid area should be more than 10*lambda 2- to calculate the equations, hfss has some passes, if the difference between two results in each passes is less than for example 0.02 (that yourself (...)
Hello, I am simulating some lambda/2 series CPW resonators, and have been getting some disagreement between my results when simulating by Wave Port or Lumped Terminal. They both show resonance at roughly the expected frequency, but disagree on order of a few hundred MHz. I am inclined to believe the wave port results as they are close to ADS Mo
I can confirm that in hfss for eigenmode simulation of planar structures, having the PML 1/4 of a wavelength from the structure gives the same results (or as much as is discernible) as having it to within 1/30 of a wavelength. As far as I can tell from the information provided, your setup looks correct.
Hi there I had like your problem, simulation by hfss taking a long time sth horrible, I know, but I decided to switch to ADS. While analysis a structure takes 40min in hfss same structure takes only I advice you use ADS. BTW my structure was microwave filter. I hope it helps you. Good luck
hi all, i was trying to simulate a simple monopole on hfss. however, when i was doing the simulation, i noticed that the length of the monopole doesn't exactly follow the lambda/4 eqn; the resonant frequency seems to be 2 or 3 times higher than the antenna was designed for. i think it has to do w/ the radius of the monopole, as well as the size o
Hi All, I'm working on ungrounded CPW structure. I've been through all previous post about CPW , how to feed it and Ansoft tutorials,and I designed a cpw antenna with SMA. From Antenna_kit released by ansoft I realized that the length of the coax should be lambda/6. So I simulated my CPW with 4 different feeding, 1.SMA with (...)
But the standard method in hfss to analyse an antenna is to put it in a box which is lambda/4 away from the antenna - they call it an airbox. Outside the airbox is a perfect electrical conductor. PEC for sure? Does that make sense? All 3D solvers that I have worked with use absorbing boundaries for
1. If I am going to have a receive antenna in simulation model, why do I need a radiation box? The radiation box measures the power radiated, gain, the far field, but what if I have an antenna in far filed to measure all that? 2. Also, the minimum radiation box size of lambda/4 is not in the far field since minimum distance in f
hmmm...i was just reading about hfss-IE and FE-BI and ran into your post. So, all we have to do is check the "Model exterior as hfss-IE domain" and set boundary box to lambda/10 and we should have a Hybrid FEM/IE solution? Is there anything else we need to do? Also, how (...)
No worries. Yes you can use waveport in this structure with a PEC cap on top of it,since hfss does solve inside so a waveport inside the radiation box yields you an error. so put a PEC cap on top of the waveport. No i havent really worked with a CPW prior to this one.But if you have any literature pertaining to your question i should be able to h
my hfss simulation always showing this error msg.what it means? "discrete solution set up,process abc3d:subprocess"wave"encountered error in global file"