Patent ID: 7994998

Claim:
A planar antenna array having a transmitting face and comprising a plurality of arrayed cells, each cell comprising: a first antenna probe; a second antenna probe spaced away from the first antenna probe, the first and second antenna probes are oriented perpendicular to each other so as to excite by the second probe and orthogonally polarized wave as compared to a wave excited by the first probe; and a conductive enclosure having a dielectric filler and situated between the first and second antenna probes, wherein the enclosure comprises a first portion adjacent to said first antenna probe and a second portion adjacent to said second antenna probe, said first and second portions having different first and second cross-sections, said cross-sections orthogonal to the propagation direction of RF waves through said conductive enclosure, wherein said first portion defines a first waveguide of the first cross section having a T-shape wherein the first waveguide is configured to pass RF waves transmitted and received by the first and second probes, and wherein said second portion defines a second waveguide of the second cross-section having a shape of a rectangle, wherein the second waveguide is configured to pass RF waves transmitted and received by the second antenna probe and to prevent passage of RF waves transmitted and received by the first antenna probe, and wherein said T-shape of said first cross-section comprises a central rectangle and two lateral extensions being oriented at 90 degrees with respect to the central rectangle, wherein said rectangle-shaped second cross-section superposes said central rectangle.