I don’t quite grok rotational effects in EM waves, perhaps someone can enlighten me: doesn’t circular/elliptical polarization allow the same kind of effect? (I.e., a theoretically infinite number of overlapping but separable signals.) Or is circular polarization fixed to a single rotation per wavelength?
Thank you. For the record, circular polarization is tied to the wavelength (I hadn’t noticed that before for some reason). Also, if I understand it right, you can superpose many (more than two) different elliptically or linearly polarized signals with different axes, but you can’t separate them.
I don’t quite grok rotational effects in EM waves, perhaps someone can enlighten me: doesn’t circular/elliptical polarization allow the same kind of effect? (I.e., a theoretically infinite number of overlapping but separable signals.) Or is circular polarization fixed to a single rotation per wavelength?
No. Circular polarization allows exactly two channels per frequency, just like linear polarization.
Thank you. For the record, circular polarization is tied to the wavelength (I hadn’t noticed that before for some reason). Also, if I understand it right, you can superpose many (more than two) different elliptically or linearly polarized signals with different axes, but you can’t separate them.