The applet demonstrates antenna polarization concepts and shows how the power coupling between antennas of different polarizations is affected by the polarization parameters.
The displays on the left depict the polarization ellipses of a receiver antenna (red) and a transmitter antenna (blue).
The scroll bars allow the Linear Polarization Angle (α) and the relative RF phase (φ) between the E-vertical (e_v) and E-horizontal (e_h) components to be varied to modify the transmitter and receiver antenna polarizations.
The corresponding polarization state (Stoke’s parameters) is displayed with the Poincaré sphere on the right as red and blue vectors. Their end point positions on the sphere surface indicate their instantaneous polarization.
The Power Coupling Loss value due to any mismatched transmit/receive polarizations is also displayed.
All polarization parameters for the current antenna states are sent to the Data Console, when cued by the Save button.

User Notes:
In the default condition, the receive antenna is RH circularly polarized and the transmitter is linear horizontal producing a 3dB polarization loss.
The values of Degree of Linear/Circular/45°-slant polarization data are simply the Stoke’s parameters, the largest magnitude value implies the dominant cardinal polarization.