Directivity Characteristics of a Waveguide - Slot Antenna Array with Multilayer Dielectric Filling of the Waveguide

In this work, computational studies of directional characteristics in the wavelength range of a waveguide-slot antenna, consisting of transverse slot radiators, having two layers of different dielectrics in the waveguide and an air gap, are carried out. A comparative analysis of the directivity characteristics for the investigated options for filling the waveguide with dielectrics is carried out under the condition of equality of the slow-wave coefficients at the central wavelength. Experimental studies of the angular frequency dependences of such an antenna have been carried out. The conditions for the optimal ratio of the dielectric permittivities of the layers, their width and mutual arrangement in the waveguide to obtain the necessary directional and energy characteristics of the array in the wavelength range are shown.