TRANSMISSION THROUGH CORRUGATED SLOTS

The transmission of electromagnetic fields through corrugated slots is studied for TE and TM polarization. A corrugated slot means that the slot is formed by a gap between two plates and that the edge malls of one or both of these two plates have grooves or corrugations running i n the direction of the slot. The field solution is obtained by using t he method of moments implemented as a successive inversion of the matr ices associated with the unknown E-fields at the apertures between the rectangular regions forming the corrugated slot. The computer code is applied to analyze slots with corrugated edges, where the corrugation s or chokes are optimized in order to make the transmission as low as possible over a given bandwidth. The results are verified by compariso n with previously published results and measurements on three differen t slot geometries.