| Author |
Message |
ravi8331
Joined: 04 Jul 2008
Posts: 123
Helped: 44
|
 22 Aug 2008 5:00 antenna parameter in hfss |
|
|
|
hi
plz tell me how can i calculate the copolarazation and crosspolarization level of antenna,efficiency,3dB beamwidth etc. parameter of antenna in HFSS.
|
|
| Back to top |
|
 |
chandregowda
Joined: 07 Jul 2008
Posts: 149
Helped: 9
Location: Bengaluru/Bangalore, India
|
| 22 Aug 2008 8:09 Re: antenna parameter in hfss |
|
|
|
hi,
first set this
Fix Phi(Φ=0), Theta (θ) is varied from -180 degree to +180 degree
Fix Phi(Φ= 90), Theta (θ) is Varied from -180 degree to +180 degree
Fix Theta(θ=90) , Phi (Φ) is varied from -180 degree to +180 degree
then plot on a single graph selecting both E Phi(Φ=0) and Ethera (Φ= 90) for Co-polar and cross polar components.
from the Graph you can get 3dB bandwidth.
is this you wanted or any calculations?
|
|
| Back to top |
|
|
Azulykit
Joined: 18 Feb 2007
Posts: 795
Helped: 100
Location: All over the Map.
|
| 26 Aug 2008 0:15 Re: antenna parameter in hfss |
|
|
|
Make sure that you know the orientation of your antenna and the preferred polarization of the radiated signal.
Co and cross polarization is often referenced to this direction.
If you want a detailed discussion of this subject run down a copy of:
"Polarization in Electromagnetic Systems" - Warren L. Stutzman
HFSS has efficiency calculations in the post processor.
Read their online help files for details.
I have always calculated 3 dB beamwidths from cartesian pattern plots where I plotted angle on the horizontal axis and gain on the vertical axis. It is trivial to extract the beamwidth at what ever level you happen to desire. Think of this as an un-wound polar plot.
|
|
| Back to top |
|
|
