Title :
Impact of Coated Ground-Plane Edge Diffractions on Amplitude Patterns of Circular Apertures
Author :
Aboserwal, Nafati A. ; Balanis, Constantine A. ; Birtcher, Craig R.
Author_Institution :
Sch. of Electr., Comput. & Energy Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
The impact of finite dielectric-covered ground-plane edge diffractions on the amplitude patterns of circular apertures is investigated. The model is based on the Geometrical Optics (GO) and the Uniform Theory of Diffraction (UTD) for an impedance wedge. The circular aperture antenna is mounted on square and circular finite ground planes that are coated with a thin lossy dielectric layer. The predictions based on the GO/UTD model are validated by comparisons to experimental results and simulated data.
Keywords :
aperture antennas; coatings; dielectric materials; geometrical optics; geometrical theory of diffraction; GO; UTD; circular aperture amplitude pattern; circular aperture antenna; circular finite ground plane; finite dielectric-covered ground-plane edge diffraction; geometrical optics; impedance wedge; square finite ground plane; thin lossy dielectric coating layer; uniform theory of diffraction; Aperture antennas; Dielectrics; Diffraction; Impedance; Surface impedance; Surface waves; Coated aperture antenna; diffraction; geometrical optics; impedance wedge; surface waves;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2360193
