Patent ID: 8519899
Filing Date: 2013-08-27
Classification: H01Q

Abstract:
1. A source of nominally circularly polarized electromagnetic energy, said source comprising: a source of linearly polarized electromagnetic energy, said linearly polarized electromagnetic energy propagating parallel to a given straight line away from said source of linearly polarized electromagnetic energy; a first dielectric slab lying on said line orthogonal to said straight line, said first dielectric slab defining at least a first aperture arrangement, said first aperture arrangement being elongated in a direction skewed relative to the direction of polarization of said linearly polarized electromagnetic energy, so that a vertical component of said linearly polarized electromagnetic energy passing through said first dielectric slab encounters a first effective vertical dielectric constant and a horizontal component of said linearly polarized electromagnetic energy passing through said first dielectric slab encounters a first effective horizontal dielectric constant, the value of which is different than said first effective vertical dielectric constant; second and third dielectric slabs, said second dielectric slab lying on said straight line orthogonal to said line, said second dielectric slab lying at a location on said straight line between said source of linearly polarized electromagnetic energy and said first dielectric slab, said second dielectric slab defining at least one through aperture arrangement, said through aperture arrangement of said second dielectric slab being elongated in a direction skewed relative to the direction of polarization of said linearly polarized electromagnetic energy, so that a vertical component of said linearly polarized electromagnetic energy passing through said second dielectric slab encounters a second effective vertical dielectric constant, the value of which is less than the value of said first effective vertical dielectric constant, and a horizontal component of said linearly polarized electromagnetic energy passing through said second dielectric slab encounters a second effective horizontal dielectric constant, the value of which is less than the value of said first effective horizontal dielectric constant, said third dielectric slab lying on said straight line orthogonal to said straight line, said third dielectric slab lying at a location on said straight line remote from said second dielectric slab and from said source of linearly polarized electromagnetic energy, said third dielectric slab defining at least one through aperture arrangement, said through aperture arrangement of said third dielectric slab being elongated in a direction skewed relative to the direction of polarization of said linearly polarized electromagnetic energy, so that a vertical component of said linearly polarized electromagnetic energy passing through said third dielectric slab encounters said third effective vertical dielectric constant and a horizontal component of said linearly polarized electromagnetic energy passing through said third dielectric slab encounters said third effective horizontal dielectric constant.