how to know polarisation of antenna in hfss?
is there any plot which that could help to conclude its type of polarisation ?
I suggest that you use plot field vector_E over a certain surface away from your antenna and animate it , this way you can see the direction of E in function of the phase and deduce the polarization.
Plot the far-field rETheta and rEPhi.
I am the new in this area. Could you tell us more detail as reading that graph to show the polarisation?
Thank you so much!
from plotting rEtheta and rEPhi how can we know whether the type of polarisation is circular or linear?
Circular polarization will have equal magnitudes of rEtheta and rEPhi.
And how to know whether it is right or left hand circular?
In general, the polarization of the radiating element is determined by the orientation of the fields and current.
For example the dipole has a polarization vector determined by the current on it.
In farfield, in the horizon direction is actually parallel to the current vector on the dipole.
What is the type of antenna you are referring to?
Look at the field/current on the excitation, think about the way the fields propagate inside the feeding mechanism and when you get to the radiating fields you can deduce the polarization of the antenna.
To completely describe the polarization state of a radiated field, two independent components are required. HFSS supports three types of descriptions:
• Spherical / polar
• Ludwig-3
• Circular
for that, you should plot field parameters like
Axial ratio of the electric field. and Polarization ratio of the electric field
the HFSS computations are respecting the IEEE definitions and norms
By plotting RHCP and LHCP gains :)