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Hi
I have problems regarding the axial ratio for a circularly polarized waveguide antenna in hfss.
As i have always done for waveguide slot antennas , i choose an airbox of λg/4 of height and use PML boundaries.
with this boundaries, the structure was optimized for an axial ratio of 0.1 dB...
axial ratio equation
Hi
I have problems regarding the axial ratio for a circularly polarized waveguide antenna in hfss.
As i have always done for waveguide slot antennas , i choose an airbox of λg/4 of height and use PML boundaries.
with this boundaries, the structure was optimized for an...
hfss infinite sphere phi
Hi
in the farfield part, you should choose the constant phi related to the plane you wanna see, and choose the angle theta az variable. the top variable must be the theta, with 'all values' and down there, phi, where you select the plane angle (like phi = 0 or phi = 90)
HFSS problem
dear everyone,
I've been simulating a symmetrical circular Horn with a symmetrical hyperboloid small subreflector placed along the z-axe. my problem is that while seeing the radiation pattern, the pattern at phi=90 is not the same as in phi=0, whereas the structure is...
hfss pml thickness site:www.edaboard.com
Hi
in the PML setup Wizard, there is the "uniform layer thickness". how should this thickness be assigned? is it related to the structure's dimension, or the wavelength? and how much does that affect the simulation's result?
thanks a lot
sara
Hi
i have to design a cassegrain antenna, with a circular horn feed.
i read in a paper that the design of cassegrain antennas has 8 parameters.
I just have the diameter of the main reflector and the f/D.
could you please tell me about the procedure for finding the other parameters?
and is it...
When I simulate with supernec, I have a null of -60dB, but with HFss, it's only -20dB. Is it the dynamic range of HFSs that is not wide enough? how could it be changed?
Thanks in advance if you reply
sara
Hi
I have tried to simulate a structure previously simulated with supernec, with hfss. but i don't get the same results at all.
the aim, while simulating with super nec was to have a null in the pattern, and as show the file i have attached, it's there. but there is no such a thing in the hfss...
Hi
in the field>edit sources part in Hfss, we can set the magnitude and phase of the excitation port. I want to optimize the pattern of a 3 element monopole array antenna by changing the magnitude and phase of excitation, but it seems that it doesn't accept parameters.
Could anyone please...
Hi
sorry I couldn't reply sooner
you have the mesh refining option in hfss. you could choose to refine it on a surface or inside a structure. as "savedadogs" said, lambda/10 is ok. but i usully seed the meshs on the structure and lower plate of my radiation box.
and by using pml at near...
Hi
to have a better response with less passes and a boundary at lamg/4 ( because greater boundaries causes much more time for simulation) , you can use mesh refining. you should refine the meshes on the structure and the meshes on the boundary. like that, your meshes will remain the same, no...
hi
i have done that for waveguide filters, by HFSS. I optimized the filter's post. and the bend, using hfss's optimization ans sweeps. It took some time.
sara
Re: what's the differences between waveport and lumpport in
Hi
if you are feeding by a coaxial cable, you could select the circular face of the coaxial (the dielectric, or air part) and assign a waveport to it.
If it's just a metal cylinder or plate as a wire antenna, you could draw a plate...
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