Title :
On the accuracy of the UTD for the scattering by a cylinder
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
fDate :
5/1/1994 12:00:00 AM
Abstract :
The UTD formulation for the scattering by a cylinder is valid for antennas that are removed from the cylinder surface. The usual guideline is that reliable results can be obtained for antennas that are about λ/4 or more away from the surface. By exploring a few cases, we show that λ/4 is unnecessarily large for the lit region and sometimes too small for the shadow region. In addition, we find that with a simple heuristic modification to the UTD, heights as small as λ/20 can be accommodated, with an accuracy that is sufficient for most engineering applications
Keywords :
antenna theory; electromagnetic wave diffraction; electromagnetic wave scattering; UTD; antennas; cylinder; engineering applications; heights; lit region; scattering; shadow region; Aerospace engineering; Councils; Electromagnetic analysis; Electromagnetic scattering; Engine cylinders; Geometry; Guidelines; Physical theory of diffraction; Receiving antennas; Thumb;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
