Depolarization (wave propagation)
Depolarization is generally a change in the polarization of an electromagnetic wave due to influences such as reflection or diffraction of the wave at obstacles.
In the case of light, this change has the effect of reducing the degree of polarization during propagation. In the case of radio waves and microwaves , the individual components of different polarization overlap again to form a common polarization direction which differs from the originally transmitted polarization direction and can therefore be measured as a rotation of the polarization direction.
Is used, this effect for example polarimetric precipitation radar devices as the measurement of depolarization for both linear polarization (as English linear depolarization ratio , LDR) as well as circular polarization (as English Circular depolarization ratio , CDR) in order from the change in polarization conclusions on the close backscattering objects. The depolarization ratio is the ratio of the cross-polarized part of the wave to the part with the original polarization.
Individual evidence
- ↑ Sergey Y. Matrosov, Depolarization Estimates from Linear H and V Measurements with Weather Radars Operating in Simultaneous Transmission – Simultaneous Receiving Mode in Journal of Atmospheric and Oceanic Technology, Volume 21, p. 574 ( online )
- ↑ PerkinElmer Technical Note, Raman Polarization Accessory for the RamanStation 400 , ( online ; PDF; 818 kB)