A reflector based on ultra-wide stopband frequency selective surface

A technology of frequency selective surface and reflector, which is applied in the field of communication, can solve the problem of narrow stop band on the surface, and achieve the effect of strong electromagnetic wave transmission, good transmission effect, and widened stop band bandwidth

Active Publication Date: 2017-04-19
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art above, and propose a reflector based on an ultra-wide stopband frequency selective surface to solve the problem of a narrow stopband on the existing frequency selective surface, which can be used for directional radiation ultra-wideband antennas

Method used

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  • A reflector based on ultra-wide stopband frequency selective surface
  • A reflector based on ultra-wide stopband frequency selective surface
  • A reflector based on ultra-wide stopband frequency selective surface

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Embodiment 1: The reflector of the present invention is composed of 20×20 frequency selective surface units 2 printed on the dielectric substrate 2, and the 20×20 frequency selective surface units are arranged periodically along the X and Y axis directions where they are located. cloth, the working frequency of which is 1.7GHz-6.1GHz, wherein the distance between the centers of adjacent reflector units is L=20mm.

[0044] The frequency selective surface unit 1 includes a zigzag shuttle-shaped cross patch 3 and a ring patch 4. The zigzag shuttle-shaped cross patch 3 is provided with a four-pointed star gap 5, and the centers of the two overlap, and the four-pointed star gap 5 The four corners of the four corners are in the same direction as the four arms of the zigzag shuttle-shaped cross patch 3; the number of the ring patches 4 is set to four, and the four ring patches are respectively located 3. In the middle of the two adjacent arms, they are arranged clockwise or co...

Embodiment 2

[0049] Embodiment 2: The design principle, technology and scheme of this embodiment are the same as those of Embodiment 1. The reflector of this embodiment is composed of 20×20 frequency selective surface units 2 printed on the dielectric substrate 2. The 20×20 The frequency selective surface units are arranged periodically along the X and Y axis directions where they are located, and the center-to-center distance between adjacent reflector units is l=20mm; the dielectric substrate 2 adopts a FR4 square plate with a thickness of h=3mm, and the FR4 material is ε r The dielectric material of =4.4; the distance between the vertices of two adjacent arms of the jagged shuttle-shaped cross 3 is l=19mm.

[0050] Compared with Example 1, the following relevant parameters have been adjusted, the sawtooth width is w=1.8mm, and the sawtooth height h 1 = 1.17 mm. The outer radius r of the largest ring 1 =2mm, t=0.6, then the outer radii of the other three rings are r 2 = 1.2 mm, r 3 =...

Embodiment 3

[0051] Embodiment 3: The design principle, technology and scheme of this embodiment are the same as those of Embodiment 1. The reflecting plate of this embodiment is composed of 20×20 frequency selective surface units 2 printed on the dielectric substrate 2. The 20×20 The frequency selective surface units are arranged periodically along the X and Y axis directions where they are located, and the center-to-center distance between adjacent reflector units is l=20mm; the dielectric substrate 2 is a FR4 square plate with a thickness of h=3mm, and the FR4 material is ε r The dielectric material of =4.4; the distance between the vertices of two adjacent arms of the jagged shuttle-shaped cross 3 is l=19mm.

[0052] Compared with Example 1, the following relevant parameters have been adjusted, the sawtooth width is w=1.12mm, and the sawtooth height h 1 = 0.84 mm. The outer radius r of the largest ring 1 =2.6mm, t=0.9, then the outer radii of the other three rings are r 2 = 2.34mm, ...

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Abstract

The invention discloses a reflecting plate based on an ultra-wide stopband frequency selective surface and belongs to the technical field of communication. The reflecting plate based on an ultra-wide stopband frequency selective surface is used for solving the problem of relatively narrow stopband of an existing reflecting plate, and comprises m*n frequency selective surface units (1) and a dielectric substrate (2), wherein the frequency selective surface units (1) are printed on the dielectric substrate (2) and periodically distributed along the X axis and the Y axis. Each frequency selective surface unit (1) is composed of a zigzag cross-shaped patch (3) in the middle of which a quadrilateral gap (5) is formed and four circular ring patches (4) of which the outer radiuses are reduced in an equal ratio; the four circular ring patches (4) are located directly between the every two adjacent arms of the zigzag cross-shaped patch (3), respectively, and distributed periodically in a clockwise or anticlockwise order. The reflecting plate based on the ultra-wide stopband frequency selective surface has the advantages of expanding the stopband width of the reflecting plate and realizing sharp drop of the two-end transmission coefficients of the stopband; the transmission of the electromagnetic waves of other frequency bands is guaranteed while the radiation characteristic of the ultra-wideband antenna is guaranteed; in short, the reflecting plate is applicable to an ultra-wideband directional radiating antenna.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a reflector based on an ultra-wide stop band frequency selective surface, in particular to an ultra-wide stop band frequency selective surface reflector for directional radiation ultra-wideband antennas. The invention can be used in satellite communication, mobile communication, ultra-wideband reflector antenna and the like. Background technique [0002] As an indispensable component in UWB radio systems, UWB antennas play a pivotal role in UWB technology. There are various forms of UWB antennas, such as planar monopole antennas, helical antennas, exponentially tapered slot line antennas, etc. In actual engineering, directional radiation is often required to ensure the quality of transmission and reception, so an additional reflector is usually used Make the UWB antenna directional radiation or further strengthen the directivity of the directional antenna. At present, commo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/14
Inventor 洪涛牟春晖姜文龚书喜王兴徐云学
Owner XIDIAN UNIV
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