Circular polarizer with switchable polarization

A circular polarizer and ring technology, which is applied to waveguide-type devices, electrical components, circuits, etc., can solve problems such as the inability to adapt to the needs of various planar antennas, the single application environment of polarizers, and the single radiation polarization form. Achieve the effect of ensuring linear polarization characteristics, fast switching, and ensuring efficiency

Inactive Publication Date: 2019-08-16
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

[0011] To sum up: the problems existing in the existing circular polarizer technology are: the radiation polarization form is single, and the polariza

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  • Circular polarizer with switchable polarization
  • Circular polarizer with switchable polarization
  • Circular polarizer with switchable polarization

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] The present invention proposes a device for converting linear polarized waves to left and right circular polarized waves, which mainly consists of two rotatable planar structures, such as Figure 5 shown. The lower layer structure is a metal grid structure (10 in the figure is a local metal grid structure), and the upper layer structure is a multilayer metal meandering line structure (20 is a local metal meandering line structure). Both the metal grid and the metal meandering lines are printed on the low-loss thin dielectric board, and the dielectric board is bonded to the foam to ensure the strength of the entire rotating structure and at the same time ensure the gap between the metal structures of each layer. The two-layer structure adopts a rotatable structure design. By changing the angle between the two-layer structure metal grid and the meander line, the ...

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Abstract

The present invention relates to the technical field of microwave antennas and discloses a circular polarizer with switchable polarization. The circular polarizer comprises an upper structure and a lower structure. According to the lower structure, metal grids are formed by arranging a plurality of metal lines with gaps, the metal grids are printed on dielectric plates, and the dielectric plates are bonded to foam layers. According to the upper structure, metal meander line structures are formed by arranging multiple metal meander lines with gaps, the metal meander line structures are printedon three layers of dielectric plates, and the three dielectric plates and two foam layers are bonded to each other. Both the upper structure and the lower structure are coaxial disk structures, and the upper structure can rotate around an axis relative to the lower structure. By rotating the structure of the polarizer, the arbitrary conversion of a linearly polarized wave to left and right circularly polarized waves is achieved, or the polarization form of an original electromagnetic wave is not changed. In addition, according to the design of the two-layer structure, the interaction between the antenna structure and meander line circular polarizer is eliminated, the shaft ratio performance of an antenna is improved, and the polarization conversion efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of microwave antennas, in particular to a polarizer switchable from linearly polarized waves to left-handed circularly polarized waves. Background technique [0002] Polarization is an important feature of electromagnetic waves. For satellite communications, a smooth link not only requires the beam of the ground antenna to be aligned with the satellite, but also requires the polarization of the ground antenna to match the polarization of the satellite beam. The polarization of the electromagnetic wave is determined by the trajectory traveled by the end of the electric field vector along the propagation direction of the electromagnetic wave. When the trajectory of the end of the electric field vector is a straight line, a circle, or an ellipse, the corresponding polarization states are linear polarization, circular polarization, and Elliptical polarization. According to the different handedness of the trajec...

Claims

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Application Information

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IPC IPC(8): H01Q15/24H01P1/17
CPCH01P1/173H01Q15/244
Inventor 黄成赵阳樊星高平刘同占黄楷博
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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