Title :
A Novel UTD-Type Diffraction Coefficient for a Straight Edge in a Curved Screen
Author :
Kandimalla, Divyabramham ; De, Arijit ; Sanyal, Subrata
Author_Institution :
Dept. of Electron. & Electr. Commun. Eng., Indian Inst. of Technol., Kharagpur, Kharagpur, India
Abstract :
A novel uniform theory of diffraction (UTD)-type diffraction coefficient for a straight edge in a cylindrically curved screen valid for both convex and concave side wave incidence is obtained via uniform asymptotic theory of diffraction (UAT) formulations. The proposed curved screen UTD-type coefficient (CSUTD) allows uniform description of the fields at all aspect angles including the grazing incidence case, where UTD coefficient-based predictions deviate sharply from available measurements, when it is applied to the problem of monostatic radar cross section (RCS) of cylindrically curved plate.
Keywords :
geometrical theory of diffraction; radar cross-sections; CSUTD; UTD-type diffraction coefficient; concave side wave incidence; convex side wave incidence; cylindrically curved plate; cylindrically curved screen; monostatic radar cross section; uniform asymptotic theory of diffraction formulations; uniform theory of diffraction-type diffraction coefficient; Diffraction; Fresnel reflection; Strips; Surface waves; Taylor series; Whispering gallery modes; Asymptotic diffraction theory; curved plate RCS; curved plate radar cross section (RCS); straight edge in a curved screen; uniform asymptotic theory of diffraction (UAT); uniform theory of diffraction (UTD);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2015.2388542
