公开(公告)号：US20150349431A1

公开(公告)日：2015-12-03

申请号：US14719101

申请日：2015-05-21

Applicant: ELTA SYSTEMS LTD.

Inventor： Uriel ODES

IPC: H01Q15/24 ,  G06F17/50 ,  G06F17/10

CPC classification number: G02B5/3058 ,  G02B27/0012 ,  G02B27/286 ,  G06F17/10 ,  G06F17/5009 ,  H01Q15/0026 ,  H01Q15/246

Abstract: A polarization rotator including a plurality of polarizer layers that are stacked along a general direction of radiation propagation. Each polarizer layers implements a wired grid pattern associated with respective extinction axis for extinction of radiation components that are polarized therealong. The extinction axes of consecutive polarizer layers are orientated differently so that polarization of radiation interacting therewith is rotated. The relative orientations of the polarizer layers are selected such that a tiling of a plurality of substantially identical polarization rotation unit cells is defined within the polarization rotator, where the unit cells are arranged with predetermined spatial periods A and B along two lateral axes. The polarization rotator may be coupled to an array of elements (e.g. antennas) arranged parallel to the tiling of unit cells, with respective spatial periodicities A′ and B′ that are integer multiples of the predetermined spatial periods A and B of the unit cells.

Abstract translation: 包括沿辐射传播的大致方向堆叠的多个偏振器层的偏振旋转器。 每个偏振器层实现与相应的消光轴相关联的有线网格图案，以消除在其上偏振的辐射分量。 连续的偏振器层的消光轴的方向不同，从而使与其相互作用的辐射的偏振旋转。 选择偏振器层的相对取向，使得在偏振旋转器内限定多个基本相同的偏振旋转单元的平铺，其中单位单元沿着两个横向轴线以预定的空间周期A和B布置。 偏振旋转器可以耦合到平行于单位单元的平铺布置的元件阵列（例如天线），其中相应的空间周期性A'和B'是单位单元的预定空间周期A和B的整数倍。