The orientation of the optical axes of the crystal plates and a transmission plane of the polarizer and the analyzer are shown in Figure 2.
By projecting the electric field vectors of the light waves ee, eo, oe, and oo onto the transmission plane of the analyzer according to the law of cosines and taking into consideration the fact that I ~ [E.sup.2], the following equation is formed:
For such control, two pairs of orthogonal transmission planes (polarizer-analyzer) and the main sections of crystalline plates (Figure 2) must be oriented at an angle of 45[degrees] (in this case, [alpha] = [gamma] = 45[degrees], [beta] = 90[degrees]).
Use of a hybrid solver with 2D transmission plane models is practical, but accurate only if such solvers include 3D full-wave models for differential mode.
We can distinguish three different approaches: distributed LC models, transmission plane models and 3D full-wave models.
Transmission plane models are good for non-localizable cases for signals with spectrum up to 3 GHz (may be extended by hybridization with 3D models).