The double Brewster angle effect

Publication date: January–February 2018 Source:Comptes Rendus Physique, Volume 19, Issues 1–2 Author(s): Laetitia Thirion-Lefevre, Régis Guinvarc'h The Double Brewster angle effect (DBE) is an extension of the Brewster angle to double reflection on two orthogonal dielectric surfaces. It results from the combination of two pseudo-Brewster angles occurring in complementary incidence angles domains. It can be observed for a large range of incidence angles provided that double bounces mechanism is present. As a consequence of this effect, we show that the reflection coefficient at VV polarization can be at least 10 dB lower than the reflection coefficient at HH polarization over a wide range of incidence angle – typically from 20 to 70 ∘ . It is experimentally demonstrated using a Synthetic Aperture Radar (SAR) image that this effect can be seen on buildings and forests. For large buildings, the difference can reach more than 20 dB.

Source: Comptes Rendus Physique - April 14, 2018 Category: Physics Source Type: research