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Broadband circular polarization frequency selective surface based on dual-Pierrot structure

A frequency selective surface, circularly polarized technology, applied in the field of electromagnetic fields and microwaves, can solve problems such as narrow bandwidth, achieve low axial ratio, improve relative bandwidth, and simple structure

Inactive Publication Date: 2018-08-28
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the unit structure only contains one Pierrot structure, and the relative operating bandwidth can only reach 7% (when the left-handed circularly polarized wave is incident, the reflection coefficient is less than -10dB), so there is a problem of relatively narrow bandwidth

Method used

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  • Broadband circular polarization frequency selective surface based on dual-Pierrot structure
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  • Broadband circular polarization frequency selective surface based on dual-Pierrot structure

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Embodiment Construction

[0022] The present invention will be further described below. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0023] The broadband circularly polarized frequency selective surface based on the double Pierrot structure of the present invention is formed by several identical unit structures arranged periodically in the two-dimensional direction, such as figure 1 As shown, the xoy plane is a periodic plane, the z-axis is the central axis of the unit structure, and the incident circularly polarized electromagnetic wave propagates along the +z-axis direction. The unit structure is a three-dimensional structure, including two Pierrot structures with exactly the same size. The two Pierrot structures are interlaced and arranged angularly symmetrically in the xoy plane. Among them, the Pierrot structure is a conductive rod that has been bent twice, and th...

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Abstract

The present invention discloses a broadband circular polarization frequency selective surface based on a dual-Pierrot structure. The broadband circular polarization frequency selective surface is formed by periodically arranging a plurality of same unit structures in a two-dimensional direction, each unit structure comprises two mutually staggered Pierrot structures, each Pierrot structure is a conductor rod through twice bending, and the other Pierrot structure in each unit structure is obtained by 180-degree rotation of the Pierrot structure around the unit center axis and translation for acertain distance along the center axis. The broadband circular polarization frequency selective surface can completely reflect left-hand circular polarization waves in the working bandwidth and can transmit right-hand circular polarization waves in a lossless mode, when the left-hand circular polarization waves are incident in a direction being perpendicular to a period surface direction, the twoPierrot structures in each unit structure can perform resonance at the same time, and the relative working bandwidth of the frequency selective surface can be improved to 19%. The frequency selectivesurface can cover the upstream frequency and the downstream frequency of an X waveband so as to have a good actual application value.

Description

technical field [0001] The invention relates to a wide-band circularly polarized frequency selective surface based on a double Pierot structure, belonging to the technical field of electromagnetic fields and microwaves. Background technique [0002] Frequency Selective Surface (FSS) is an array structure composed of several identical units arranged periodically in two dimensions. It has frequency selective filtering characteristics for electromagnetic waves with different operating frequencies, polarization states and incident angles. Circularly polarized FSS, as a type of FSS, has a frequency-selective filtering effect on circularly polarized electromagnetic waves, that is, at the resonant frequency, it can completely reflect the incident left-handed circularly polarized electromagnetic wave (or right-handed circularly polarized electromagnetic wave). However, the incident right-handed circularly polarized electromagnetic wave (or left-handed circularly polarized electromag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/22H01P1/20
CPCH01Q15/22H01P1/20
Inventor 李波章一雄赵轩楷刘雨柔
Owner NANJING UNIV OF POSTS & TELECOMM
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