On multiple scattering between slits in an infinite PEC screen

In this paper, we shall try to find out a useful marker with specific propagation feature for appropriately modeling outdoor/indoor interface environments, by analyzing diffraction problem for finite number of slits in an infinitely long PEC screen. In the present analysis, we utilize the Kobayashi potential (KP) method, which is a rigorous eigen-function expansion in terms of Weber- Schafheitlin type integrals with discontinuous features. The material filled slits array is considered as a simplified indoor/outdoor interface model, i.e. glass windows with PEC frames. In particular, we investigate how the multiple scattering between the slits influences on the diffraction characteristics. Time harmonic factor e-^iwt is assumed and suppressed throughout the context.