DIELECTRIC AERIAL Russian patent published in 2009 - IPC H01Q13/24 

FIELD: electricity.

SUBSTANCE: invention relates electric radio engineering and particularly to dielectric aerial containing round waveguide with ribbed flange. The latter is located on the open end of waveguide. There is also a dielectric rod being installed coaxially inside the waveguide and projecting the waveguide limits. Dielectric bushing is also available in the aerial and situated on the projecting part of the dielectric rod. According to the invention the projecting part of dielectric rod is additionally provided with dielectric insertion of the cross section similar to the rod. It is installed at a distance L₁=(0.6÷0.7)λ from the open waveguide end. The length is L₂=(1.1÷1.3)λ, relative dielectric permeability of insertion material must be ε₂=(0.8÷0.9)ε₁, where λ - average length of operating wave; L₁ - distance from the open waveguide end to dielectric insertion; L₂ - length of dielectric insertion; ε₁, ε₂ - relative dielectric permeability values for dielectric rod and insertion accordingly.

EFFECT: provision of uneven table top part of the aerial beam no more than 1 dB within the frequency band to 17% and minor lobes level not exceeding 10 dB.

6 dwg