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Frequency selective surface

A frequency-selective surface and material technology, applied in the direction of the radiation unit cover, waveguide devices, electrical components, etc., can solve the problems of small microwave absorption bandwidth, inconvenient conformal shape, large FSS volume, etc., to achieve small structure size, easy installation, The effect of a wide absorption range

Inactive Publication Date: 2015-07-08
JIANGSU UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a frequency selective surface, which solves the technical problems of the existing FSS such as large volume, inconvenient conformal shape, small wave-absorbing bandwidth and low practicability

Method used

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] The performance of the FSS structure is not only related to the size and periodic arrangement of the FSS units, but also related to the selected material itself. Traditional FSS materials are metal or conductor coatings, semiconductor films and nano-films can also be used as FSS materials, and more novel ones can be realized through conductive ink coatings and slow-drying water. But no matter which material is used, this material can be equivalent to a model with a specific relative permittivity and a specific conductivity.

[0023] Such as figure 1 Shown is the overall structure of the frequency selective surface. It includes 100 units 1 and a bottom plate 3. The units 1 are arranged in 10 rows and 10 columns. The units 1 in each row are aligned in the horizontal direction, and the units 1 in each column are aligned in the vertical di...

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Abstract

The invention discloses a frequency selective surface. The frequency selective surface comprises 100 units and a base plate, wherein the units are arranged into ten lines and ten rows, the units on each line are aligned in the horizontal direction, the units on each row are aligned in the vertical direction, the units are square sheets with the side length being 5.8 mm and thickness being 0.1 mm, a square hole with the side length being 4.2 mm is formed right in the middle of each unit, the distance between every two units is 1.9 mm, and the units are made of a material with relative dielectric constant being 1 and specific conductance being 200 s / m and are attached to the base plate made of an insulating material. The frequency selective surface is small in size, capable of being conformal with a system conveniently and convenient to install. The frequency selective surface (FSS) structure is large in wave absorbing bandwidth and can absorb waves within an ultra-wide-band range 2-18 GHz, reflection coefficient is smaller than -15dB, and the frequency selective surface is especially suitable for ultra-wide-band antennae.

Description

technical field [0001] The invention relates to a frequency selective surface and belongs to the field of microwave technology. Background technique [0002] Frequency Selective Surface (FSS), referred to as FSS, is a multi-dimensional periodic structure. This selective structure has good selectivity for the transmission and reflection of electromagnetic waves. Within its band-pass range, electromagnetic waves can be smoothly Through the FSS structure, in its band-stop range, the electromagnetic wave is completely reflected back. Through the adjustment and design of the periodic structure, different band-pass and band-stop ranges can be obtained. [0003] From a structural point of view, the FSS structure is a periodic structure formed by several FSS units through different arrangements. If the frequency of the electromagnetic wave is the same as the resonant frequency of the FSS unit, the FSS can exhibit total transmission or total reflection characteristics. Generally spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01Q1/42
Inventor 田雨波刘东陈风
Owner JIANGSU UNIV OF SCI & TECH
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