CHARACTERIZATION OF MICROWAVE ABSORBERS AT OBLIQUE INCIDENCE

Abstract

An extension toward generalization including cases of oblique incidence angles is attempted. A more general model has been developed for linear plane polarization, which determines the refl ect.i on Coefficient. of a mul ti. layer absorber on a metal sheet. as either a function of frequency for a specified angle of incidence or as a function of incidence angle for a specified frequency. The absorption characteristics of two sheets were studied as a function of incident angle by measuring the reflect-ion coefficients for parallel and perpendicular polarizations. For both sheets, these reflection coefficients were obtained by using free-space bi st.a t.i c calibration technique and plotted the 'absorption characteristics as function of frequency for each incident. angle.