how to find out the Co and cross polarization of the corrugated horn using hfss
pls any1 let me what is the level of cross n co polar polarization...
you can set up an additional radiation far field setup which covers only a short section (say -10<theta<10) and compute antenna parameters over this region. i got the following results for your model. was the relationship between the magnitudes or rEx and rEy what you were looking for ?
i want to know, how i should find out the cross polarization level of dis corrugated horn antenna using HFSS...
Linear polarization for your antenna is achieved along the X axis.
At boresight, dB(GainX) = 20 dB
The cross polarization to this will be dB(GainY) = -24 dB
So the cross pol level is around -44 dB which is very good *.
*note: I have not solved or checked your model for validity. I have merely interpreted the results provided in the attachment.
I am also working on corrugated horn antenna and I am getting co-pol(gainx) +20 dB and cross pol(gainy) -18 dB. But, problem is that I am getting peak in cross pol at boresight. Can you help me in finding reason for the same?
hey as i m interested in to test the cross and copolar level when corrugated antenna is verticaly polarised and horizontally polarized both.....
and how did u know it is lineraly polarized in X direction.....
Hi
I did not see this post till now.
As long as there is a large difference between co-pol and cross-pol, it should be fine. It is common to find a small peak at boresight for the cross-pol also. It depends on your antenna design and we cannot make any guesses without talking specifics.
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X, Y are just names labels given to the different axes. In your setup, the E-field vectors were all pointing and oscillating only along the X direction (thus linearly polarized along X).
This can also be seen through the component of E-field vector being maximum along X. (i.e. rEx >> rEy and rEx >> rEy at the far field observation point)
hey as i am new and dnt have much experience with hfss.....
Will u help me how to change the E field vectors to Y directions ...so
One simple way is to rotate your input setup by 90 deg about the Z axis.
Then your modes will now also change their alignment and you will get the opposite linear polarization. (i.e. E aligned along Y)
In the given design,corrugated horn is excited using circular wveguide which is excited using waveport and the number of modes used is 2 in +X and +Y direction,so how i could rotate my input setup in HFSS
[QUOTE=jeeudr;1203850]Hi
I did not see this post till now.
As long as there is a large difference between co-pol and cross-pol, it should be fine. It is common to find a small peak at boresight for the cross-pol also. It depends on your antenna design and we cannot make any guesses without talking specifics.
Now, I am getting very good response. co polarization is 21 dB and cross polarization is now -62 dB
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just by giving modes in reverse order. means, if you have define 1st mode in x direction, then replace it by giving it in y direction and 2nd one in the x direction in place of y direction. k?
[QUOTE=Anuj_Modi;1205913]Looks good to me.
hiii
I posted the new thread whose link is given below....pls anlayse the design.rar file and help me out
https://www.edaboard.com/thread282047.html#post1206524
[QUOTE=jeeudr;1203893]One simple way is to rotate your input setup by 90 deg about the Z axis.
Then your modes will now also change their alignment and you will get the opposite linear polarization. (i.e. E aligned along Y)[/QUOTE/]
we design inx-y plane then how to change input setup by 90 abt z?