Patent ID: 9013359
Filing Date: 2015-04-21
Classification: H01Q,H04B

Abstract:
1. An onboard directional plane antenna comprising: at least one array of radiating-slot waveguides comprising an alternating succession of three superposed metallic plates, respectively lower, intermediate and upper plates and two dielectric substrates, respectively lower and upper substrates, inserted between two consecutive metallic plates, the two lower and upper substrates each comprising at least four adjacent waveguides, the waveguides of the lower substrate and of the upper substrate being identical in number, corresponding pairwise and communicating with one another pairwise by way of coupling slots passing through the intermediate metallic plate, each waveguide of the upper substrate further comprising a plurality of radiating slots passing through the upper metallic plate, all the radiating slots of one and the same waveguide being parallel to one another and oriented in one and the same direction, the radiating slots of two adjacent waveguides being disposed in chevrons, each waveguide of the lower substrate comprising an individual internal feed circuit comprising an internal individual electronic circuit for phase shifting and amplification, and an external phase shifting electronic circuit intended to establish a circular polarization of a wave emitted by the array of radiating-slot waveguides, the external phase shifting electronic circuit comprising a first external phase shifter having a phase value equal to 180° and intended to feed two waveguides in phase opposition, the other two waveguides being fed in phase, and a second external phase shifter having a phase value equal to 90° and intended to establish a phase quadrature between the two waveguides fed in phase and the two waveguides fed in phase opposition.