Leaky modes in slotted semielliptical or semicircular waveguides

The characteristics of propagation of leaky modes in a semielliptical or semicircular waveguides with a slot radiating into half-space are investigated. The method of analysis is exact in that no infinite expansions in eigenfunctions are used. It is based on single mode representation of the field in the half-space and the waveguide with subsequent exact matching. Such modes can be used for the determination of radiation patterns of slots in infinite screens excited by semicircular guides.