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Broadband circular polarizer and antenna system

A circular polarizer and broadband technology, applied in the field of circular polarizers, can solve the problems of narrow frequency band and complex design of circular polarized waves, and achieve the effects of reducing electromagnetic wave reflection, simple structure, and increasing gain

Active Publication Date: 2012-12-12
KUANG CHI INST OF ADVANCED TECH
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Problems solved by technology

The design of the above method is complicated and the frequency band of the circularly polarized wave generated is relatively narrow

Method used

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  • Broadband circular polarizer and antenna system
  • Broadband circular polarizer and antenna system
  • Broadband circular polarizer and antenna system

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Embodiment Construction

[0022] Light, as a kind of electromagnetic wave, when it passes through the glass, because the wavelength of the light is much larger than the size of the atom, the glass can be described by the overall parameters of the glass, such as the refractive index, rather than the detailed parameters of the atoms that make up the glass response to light. Correspondingly, when studying the response of materials to other electromagnetic waves, the response of any structure in the material whose scale is much smaller than the wavelength of the electromagnetic wave to electromagnetic waves can also be described by the overall parameters of the material, such as the dielectric constant ε and magnetic permeability μ. By designing the structure of each point of the material, the dielectric constant and magnetic permeability of each point of the material are the same or different, so that the overall dielectric constant and magnetic permeability of the material are arranged in a certain order,...

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Abstract

The invention discloses a broadband circular polarizer. The broadband circular polarizer comprises a plurality of substrate layers, and a plurality of artificial microstructures periodically arranged between adjacent substrate layers to form a plurality of artificial microstructure layers, wherein the artificial microstructure is a rectangular metal sheet; the single artificial microstructure layer is identical in topological structure and size of the artificial microstructure; the size of the rectangular metal sheet of different artificial microstructure layers increases gradually to a maximum value and then decreases gradually. The broadband circular polarizer provided by the invention is designed based on the metamaterial principle, is simple in structure and can realize good circular polarization effect in 30 to 40GHz. In addition, the broadband circular polarizer can meet the requirement for impedance matching of electromagnetic wave propagation by gradually increasing and then gradually decreasing the size of the artificial microstructures along the electromagnetic wave propagation direction, thereby reducing the electromagnetic wave reflection and improving the gain.

Description

technical field [0001] The invention relates to a circular polarizer, in particular to a broadband circular polarizer and an antenna system. Background technique [0002] With the development of modern satellite communication, remote control, and telemetry technology, a single polarization form is far from meeting the requirements of modern satellite communication. Circularly polarized waves can resist the interference of clouds, rain, and snow, and can show great advantages in Ka and higher bands. In electronic countermeasures, circularly polarized waves can detect and interfere with various linearly polarized and elliptically polarized electromagnetic waves of the enemy; installing circularly polarized antennas on violently swinging or rolling aircraft can also be used in harsh environments. Capture information, so circularly polarized waves are widely used in astronomy, aerospace communications, and remote sensing equipment. [0003] The existing methods of generating c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/24H01Q15/00
Inventor 刘若鹏赵治亚寇超锋叶金财
Owner KUANG CHI INST OF ADVANCED TECH
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