Radiation and Scattering of Electromagnetic Waves by a Multielement Vibrator–Slot Structure in a Rectangular Waveguide

A problem of radiation and scattering of electromagnetic waves by a structure, consisting of a narrow transverse slot cut in the broad wall of a rectangular waveguide and two vibrators with a variable surface impedance located inside the waveguide and interacting with one another, is solved. A solution of integral equations for electric currents at the vibrators and equivalent magnetic current in the slot is derived using the generalized method of induced electro-magneto-motive forces (EMMF). Conditions needed to achieve maximum slot radiation coefficient are defined. Computed and experimental graphs of electrodynamic characteristics of the vibrator-slot structure for different vibrator locations and for the various surface impedance distributions along the vibrators are presented.