The validity of approximation currents on a resistive strip using physical optics

This paper investigates the validity of applying PO to 6nd the currents induced on a nsistive strip by an incident plane wavc Prim in~e~tigations did not coneider PO aa a viable method. %or and Liepa obtained the currents induced in resistive strip by &ng the method of momenta (MOM)[l]. More recently, Ray and Mittra used the spectral iterakive technique to 6nd the -nrS in such ntrips[2]. In these two studies the atrip either had a uniform or a tapered resistivity. In thio study currents on strips having vations reSisrMtim were computed ming MOM and PO expresaom. The results indicate that PO provides simple, =curate upressiono for the current when the resistiviw on the strip haa a smooth taper with large valuea of reeistance at the edges.