I. Akduman et A. Buyukaksoy, ASYMPTOTIC EXPRESSIONS FOR THE SURFACE CURRENTS INDUCED ON A CYLINDRICALLY CURVED IMPEDANCE STRIP, IEEE transactions on antennas and propagation, 43(5), 1995, pp. 453-463
The present paper is concerned with the derivation of the electric and
magnetic surface currents induced on a cylindrically curved impedance
strip. By considering the locality of the high-frequency diffraction
phenomena the physical (-pi,pi) interval for the usual cylindrical pol
ar angle is replaced by an abstract infinite interval (-infinity,infin
ity) whereby the related mixed boundary value problem is formulated as
a ''modified matrix Hilbert'' problem. By using the Debye approximati
ons for the Hankel and Bessel functions involved, the modified matrix
Hilbert problem is first decoupled and then reduced to two pairs of si
multaneous Fredholm integral equations of the second kind which are so
lved by iterations. The explicit expressions for the electric and magn
etic surface current components attributable to the reflection, edge o
r surface diffractions of the incident field as well as to the edge re
flections of these components themselves are obtained by evaluating th
e current integrals asymptotically. The results derived in this paper
constitute also a rigorous proof for a conjecture made by Idemen on th
e reflections of the surface currents at the edges.