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99 Threads found on Hfss Lambda
i had design the dipole at 2.4GhZ, now prob is at the end of the design need to draw radiation box . what are the rules for drawing the dimentions of radiation box? is there any rules/equations / any relation with respect to 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 from. Thanks for advanc
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 matched well with the s
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 coming ze
I have some questions about radiation boundary I want to clarify, 1) How long should the radiation boundary extend? I have heard it should be 1/4 of wavelength. If so, which is the correct way to implement? 121536 1/4 wavelength height and start at position 0 (bottom, ground plane) This makes my radiation patte
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 hfss13 and d
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 lambda refinement as shown
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 define it
Hi in literature sometimes we give the input impedance as a function of L / lambda0 (normalized length) Please, can someone show me how to do to plot it as a function of L / lambda in hfss for whatever structure (e.g. for a dipole, or a patch antenna). of course I know how to do it as a function of frequency. Thanks
Hello. I am new member in this forum. Please help me. UWB Range=3 to 17 GHz Notch at..range=5.1 to 6 GHZ My questions are.... 1.What should be my solution frequency in hfss? 2.What should be the dimensions of the AIR-BOX? (if (lambda/4) then....lambda of which frequency?) 3.What should be my frequency setup and sweep?
Hello I want to know that What should be the Dimension of radiation box in hfss?
Hi. you should be choosen the size of air box,lambda/4 larger than substrate or your design. your design should be completely inside of air box. Good Luck.
Hello, I have a problem with a very basic simulation. I am trying to simulate plane wave propagation from one medium to another. The problem is not the setup, but the phase of the wave. Setup: All lengths in the setup are parameterized. The basic length unit is the free space wave length lambda (@14Ghz). Die setup is 4lambda long, with (...)
Hello Everybody I am working with hfss. I need to design a circularly polarized MSPA with 5% AR B.w at 30 GHz the dimensions has to by <= lambda/2*lambda/2. Please any suggestions???
Hi, I'm trying to understand basic simulation on hfss. I've been told that when using boundary RADIATION, the airbox should be set up with lambda/4 air space, being lambda= c / freq (this freq is the one that is set up on "solution frequency" on Analysis options) My question is why lambda/4 should be the minimum? I'm (...)
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