Polarization switching surface based on sub-wavelength harmonic structure

A technology of polarization conversion and resonant structure, applied in electrical components, antennas and other directions, can solve the problem of increasing research on fast polarization converters, and achieve the effect of small size, light weight and simple design structure

Inactive Publication Date: 2016-10-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in order to adapt to the characteristics of modern information-intensive and changeable, antennas with only single-polarization characteristics can no longer meet the requirements, leading to more and more research on fast polarization converters.

Method used

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  • Polarization switching surface based on sub-wavelength harmonic structure
  • Polarization switching surface based on sub-wavelength harmonic structure
  • Polarization switching surface based on sub-wavelength harmonic structure

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] Embodiments of the present invention and its implementation work process are as follows:

[0036] Such as image 3 As shown, the implemented polarization conversion surface is mainly obtained by sub-wavelength resonant units passing through transverse and longitudinal periodic arrays.

[0037] Such as figure 1 with figure 2 As shown, the sub-wavelength resonant unit has a square structure, including five layers of materials. The first layer is a square sheet-shaped top layer of metal copper sheet 1 with gaps, the second layer is an upper dielectric plate 2 that plays a supporting role, and the third layer is a middle layer. The grounding metal copper sheet 3, the fourth layer is the lower dielectric board 4 for supporting, the fifth layer is the bottom metal copper sheet 5 in the shape of a square sheet with gaps, the middle grounding metal c...

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Abstract

The invention discloses a polarization switching surface based on a sub-wavelength harmonic structure. The polarization switching surface is mainly obtained in a mode that a sub-wavelength harmonic unit is subjected to a horizontal cycle array and a longitudinal cycle array, the sub-wavelength harmonic unit is of a square structure and comprises a top-layer metal copper sheet, an upper medium plate, a middle grounded metal copper sheet, a lower medium plate and a bottom-layer metal copper sheet, and the middle grounded metal copper sheet is located between the upper medium plate and the lower medium plate; penetrating through holes are formed in the five layers of materials of the sub-wavelength harmonic unit, the top-layer metal copper sheet and the bottom-layer metal copper sheet are oppositely arranged, and the polarization rotation directions of the top-layer metal copper sheet and the bottom-layer metal copper sheet are contrary to each other. The polarization switching surface is low in cost, simple in structure, thin, light, good in conversion performance and capable of flexibly controlling the polarization state of electromagnetic waves and conducting selective electromagnetic wave transmittance and reflectance and is widely applied to the fields of imaging, antennas, communication systems, electromagnetic confrontation and governance, military invisibility and the like.

Description

technical field [0001] The invention relates to the field of electromagnetic wave polarization conversion, in particular to a polarization conversion surface based on a sub-wavelength resonance structure for controlling the polarization state of electromagnetic waves in various wireless electromagnetic wave transmissions. Background technique [0002] Polarization is an important characteristic of electromagnetic waves, which can be described by the oscillation behavior of the electric field vector E during electromagnetic wave transmission. When the electromagnetic wave propagates forward along the direction of the wave vector k, as time changes, when the trajectory of the end of the electric field vector E is a straight line, a circle and an ellipse, the corresponding polarization states are linear polarization, Circular and elliptical polarization. In practical applications, the polarization characteristics of electromagnetic waves are often detected and their polarizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/24
CPCH01Q15/242
Inventor 叶德信曹成皇甫江涛冉立新
Owner ZHEJIANG UNIV
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