Fotos und Informationen aus der Uckermark zum Telefon- und Raketenmuseum Pinnow, Amt Oder-Welse. Eine Zeitreise in die Geschichte des Rüstungsbetriebes IWP.
The appearance of the polarization screen can means that the Illumination radar for the SA-6 might works on the circular polarization, while the missile seeker works in perhaps Horizontal polarization. The screen will later convert the reflected circularly polarized return from target into horizontal.
As for why circular, it could be perhaps to allow maximization of signal strength of the radar in "all weather" condition as circularly polarized wave able to penetrate rain with less loss. While horizontally polarized return signal will AFAIK maximize the apparent target RCS. Without the polarization screen, the reflected circularly polarized signal will induce about 3dB of polarization loss, which perhaps the Designer wish to avoid.
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