Metamaterial polarization transformer

A technology of converters and metamaterials, applied in the directions of waveguide-type devices, electrical components, circuits, etc., can solve problems such as difficulty in implementation, and achieve the effects of low manufacturing cost, easy control and design, and diverse functions

Active Publication Date: 2012-05-30
KUANG CHI INST OF ADVANCED TECH +1
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Problems solved by technology

The energy loss of this method is small, but to obtain the outgoing wave with good pol

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Embodiment Construction

[0030] "Metamaterial" refers to some artificial composite structures or composite materials with extraordinary physical properties that natural materials do not have. Through the orderly design of the structure on the key physical scale of the material, the limitation of some apparent natural laws can be broken through, so as to obtain the supernormal material function beyond the ordinary nature inherent in nature.

[0031] Three important features of "metamaterials":

[0032] (1) "Metamaterials" are usually composite materials with novel artificial structures;

[0033] (2) "Metamaterials" have extraordinary physical properties (often not available in natural materials);

[0034] (3) The properties of "metamaterials" are jointly determined by the intrinsic properties of the constituent materials and the artificial microstructures in them.

[0035] As common knowledge, we know that:

[0036] Electromagnetic waves have polarization characteristics, and its polarization method...

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Abstract

The invention relates to a metamaterial polarization transformer which comprises a base material and a plurality of artificial micro structures being arranged on the base material and having anisotropic electromagnetic characteristics, wherein the artificial micro structures are uniformly arranged on one or more planes vertical to an entering direction of electromagnetic waves, refractive indexesinside the metamaterial polarization transformer are uniformly distributed, an electric field vector of the entering electromagnetic waves is decomposed into two non-zero quadrature components on oneor more planes, the two quadrature components are respectively parallel or vertical to an optical axis of positions where the micro structures are in, and after the electromagnetic waves penetrate through the metamaterial polarization transformer, the two quadrature components have a phase difference delta theta different from a phase before entering. The metamaterial polarization transformer hasa simple structure, and can easily realize polarization transformation of the electromagnetic waves.

Description

technical field [0001] The invention relates to a device for electromagnetic wave polarization conversion, in particular to a metamaterial polarization converter. Background technique [0002] The polarization state of electromagnetic waves is widely used in liquid crystal displays, radio frequency antennas and various radiation devices, satellite antennas and optical devices. Traditional polarization conversion devices usually limit the transmission of one polarized wave and reflect the unwanted polarized wave; or divide the wave into two beams with different polarization states, so one polarized wave can only carry less than Half of the energy has a large energy loss, and the process requirements and costs are high. In addition, the conversion between circularly polarized waves and linearly polarized waves can be achieved by using waveguides with tapered cross-sections. The energy loss of this method is relatively small, but to obtain outgoing waves with good polarizatio...

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Application Information

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IPC IPC(8): H01P1/16H01P1/17H01Q15/24
Inventor 刘若鹏徐冠雄季春霖
Owner KUANG CHI INST OF ADVANCED TECH
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