Vol. 11, no.1, 2019
РусскийEnglish
INFORMATION TECHNOLOGIES
POLARIZATION-ANGULAR DEPENDENCES OF THE REFLECTION AND TRANSMISSION COEFFICIENTS OF FREE PLATES OF QUASI-ANISOTROPIC ICE IN THE L-RANGE
Mikhail G. Evtikhov, Galina V. Arzamastseva
Kotelnikov Institute of Radioengineering and Electronics of RAS, Fryazino branch, http://fire.relarn.ru
Fryazino 141190, Moscow region, Russian Federation
Received 18.03.2019, accepted 05.04.2019
Abstract. The polarization-angular dependences of the reflection and transmission coefficients of free plane-parallel ice plates in the region of 0°С, when flat electromagnetic waves of s- and p-polarization fall on them and are recorded by an L-band radiometer 1.41 GHz are studied theoretically. It is shown that the observation of interference effects in ice plates in the L-range is limited to a plate thickness of 4.3 meters. This limitation is due to a radiometer bandwidth of 20 MHz. Ice is considered an isotropic or uniaxial crystal with an anisotropy coefficient of 15%. Three types of directions of the anisotropy axis are considered in the assumptions of the quasi-anisotropic medium model. The value of the Brewster angle is obtained, and it is shown that it does not depend on anisotropy. Reflective and anti-reflective effects are associated with a change in wavelength in the direction perpendicular to the surface of the plate. In turn, this length depends on the angle of incidence, polarization, and direction of the anisotropy axis. The possibility of forming interference regions of transparency for certain thicknesses is shown, the reflection coefficients for both polarizations are significantly reduced, and the transmittances increase. Interference areas of transparency can be formed both at the Brewster angle and at other angles. These effects are associated with interference phenomena and their enhanced effect of anisotropy.
Keywords: reflection, refraction, Fresnel equations, permittivity, millimeter waves, ice, resonance, multilayer plates
UDC 0535.391.4, 53.082.53, 53.083.2
RENSIT, 2019, 11(1):73-84 DOI: 10.17725/rensit.2019.11.073
Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/270/11(1)73-84e.pdf