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Reflecting plate based on frequency selection surface units

A frequency selective surface, frequency selective technology, applied in electrical components, antennas and other directions, can solve the problems of inability to achieve multi-angle antenna radar cross section reduction, large size, inability to use antennas, etc., achieve good angular stability, extend the total length, The effect of increasing the effective arm length

Inactive Publication Date: 2013-01-30
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to address the deficiencies of the above-mentioned prior art, and propose a reflector based on a frequency-selective surface unit to solve the problem that the existing frequency-selective surface unit is relatively large in size and cannot be applied to smaller-sized antennas. The problem of reducing the radar cross section of multi-angle antenna

Method used

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  • Reflecting plate based on frequency selection surface units
  • Reflecting plate based on frequency selection surface units
  • Reflecting plate based on frequency selection surface units

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: the resonant frequency that is made up of 240 frequency selective surface units is the reflecting plate of 3.8GHz

[0033] The substrate of the frequency selective surface reflector is FR4 dielectric board with a length of 264mm, a width of 110mm, a thickness of 1.6mm, and a dielectric constant of 4.4.

[0034] The length w of the rectangular trunk of the patch l=4.5mm, width w t =0.25mm, three arc branches are alternately distributed on the rectangular trunk, the width of the arc branches is w=0.2mm, and the radii of the three arc branches are respectively w from the inside to the outside 1 =2.28mm, w 2 =3.39mm, w 3 =4.5mm, the coverage angles are θ 1 = θ 2 = θ 3 =80°.

[0035] On the surface of a 264mm×110mm rectangular substrate, the grid is evenly divided according to a square with a side length of 11mm. The center of the square grid is the center of the frequency selective surface unit. The 240 frequency selective surface units are uniformly ar...

Embodiment 2

[0036] Embodiment 2: the resonant frequency that is made up of 120 frequency selective surface units is the reflecting plate of 3.9GHz

[0037] The substrate of the frequency selective surface reflector is an FR4 dielectric board with a length of 264 mm, a width of 65 mm, a thickness of 1.6 mm, and a dielectric constant of 4.4.

[0038] The length w of the rectangular trunk of the patch l =4.4mm, width w t =0.25mm, two arc branches are alternately distributed on the rectangular trunk, the width of the arc branches is w=0.19mm, and the radii of the two arc branches are respectively w from the inside to the outside 1 =3.39mm, w 2 =4.6mm, the coverage angles are θ 1 =75°, θ 2 =80°.

[0039] On the surface of a 264mm×65mm rectangular substrate, the grid is evenly divided into rectangles with a side length of 11mm and a width of 13mm. The center of the rectangular grid is the center of the frequency selective surface unit. The 120 frequency selective surface units are arranged...

Embodiment 3

[0040] Embodiment 3: the resonant frequency that is made up of 100 frequency selective surface units is the reflector of 4GHz

[0041] The base plate of the frequency selective surface reflector is an FR4 dielectric board with a length of 120 mm, a width of 120 mm, a thickness of 1.6 mm, and a dielectric constant of 4.4.

[0042] The length w of the rectangular trunk of the patch l =4.3mm, width w t =0.24mm, two arc branches are alternately distributed on the rectangular trunk, the width of the arc branches is w=0.2mm, and the radii of the two arc branches are respectively w from the inside to the outside 1 =3.37mm, w 2 =4.5mm, the coverage angles are θ 1 =75°, θ 2 =80°.

[0043] On the surface of a 120mm×120mm square substrate, the grid is evenly divided according to a square with a side length of 12mm. The center of the square grid is the center of the frequency selective surface unit. The 100 frequency selective surface units are uniformly arranged in a rectangular sha...

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Abstract

The invention discloses a reflecting plate based on frequency selection surface units. The reflecting plate is mainly used for solving the problems that an existing reflecting plate is relatively large in size, cannot be applied to antennae with smaller sizes and cannot reduce the antenna radar cross section in a multi-angle manner. The reflecting plate comprises Z frequency selection surface units (1) and a base plate (2), wherein Z is larger than or equal to 4; the Z frequency selection surface unit are uniformly distributed on the surface of the base plate in a rectangular array; each frequency selection surface unit consists of four pasters; each paster (11) comprises a rectangular trunk (111) and n arc-shaped branch knots (112), and the n arc-shaped knot are alternatively arranged on two sides of the rectangular trunk; and the four pasters respectively rotate 90 degrees, 180 degrees and 270 degrees by utilizing the bottom left corners of the pasters as centers, so as to form a crossed distribution structure of the four pasters. According to the reflecting plate, the electric size of each frequency selection surface unit is prolonged, the space is fully utilized, the resonant frequency is reduced, and the reflecting plate can be applied to the antennae with smaller sizes and can be used for reducing the antenna radar scattering cross section in a multi-angle manner.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic materials, and relates to a reflection plate of a frequency selective surface unit and an antenna radar section reduction technology, which can be used for mobile communication, wireless local area network, indoor shielding and safety protection, etc. Background technique [0002] Radar cross section is a complex physical quantity. It is the most basic parameter to characterize the identifiable characteristics of the target, and it is a measure of the return scattering power of the target in a given direction or the incoming wave direction under the irradiation of incident waves. Reducing the radar cross section is to control and reduce the radar scattering characteristics of the target, reduce the effectiveness of the enemy's electronic detection system, and thus improve the penetration capability and survivability of one's own combat tools. In the current complex electromagnetic environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/14
Inventor 姜文洪涛李成凯于松涛龚书喜刘英张扬邓兆彬
Owner XIDIAN UNIV
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