Planar antennas for the coupling of active element (AE) with waveguide section are of great practical interest as alternative for coaxial- and post-waveguide electrodynamic structures [1]. These structures have high recurrence of parameters, low cost and allow monolithic integration with AE. Application of slot antennas (SA) in such equipment allows to simplify AE connection and to use microstrip line to match and design power circuit [2].

The given paper offers a method of partial regions investigation of transverse-planar structures with SA.