A Frequency Selective Surface Structure

A technology of frequency selective surface and structural unit, applied in the direction of circuits, waveguide devices, electrical components, etc., can solve the problems of non-selective shielding frequency, high cost, large structure size of frequency selective surface, etc.

Active Publication Date: 2020-08-28
XIAN ZHONGXING NEW SOFTWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although shielding boxes and shielding rooms can achieve the function of shielding electromagnetic waves, the frequency of shielding is not selective, and they occupy a large volume and are expensive
The simple dipole frequency selective surface has frequency selective characteristics for specific electromagnetic waves. Due to its simple structure, it shows different transmission characteristics for electromagnetic waves incident at different angles, and its stability is poor, and its frequency selective surface structure size is relatively small. Large, can not achieve the effect of miniaturization
[0005] It can be seen that none of the existing frequency selectors can meet the requirements of miniaturization, and the general frequency selection surface is a half-wavelength resonator. In actual design and application, it is impossible to make the size large enough to meet the resonance at a specific frequency; Therefore, there is an urgent need for a miniaturized frequency-selective surface structure, which can meet the needs of miniaturization while having frequency-selective properties.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0044] In the frequency selective surface structure unit, a dielectric substrate with a thickness of 1 mm, a dielectric constant of 4.3, and a tangent loss of 0.025 is used. Formed on the dielectric substrate in the form of metal patches such as figure 2 In the structure shown, the number n of square rings in the slit square ring array is 12, wherein 6 slit square rings intersect with the first metal strip 31 and the second metal strip 32 at the same time, and their lengths are L1, L2, L3 respectively , L4, L5, L6, the 6 square rings do not intersect with the second metal strip 32, but only intersect with the first metal strip 31, and their lengths are respectively L11, L22, L33, L44, L55, L66, specifically:

[0045] A square ring structure and a closed square ring metal wire are arranged on the mechanism plane of the dielectric substrate. The side length of the closed square ring metal wire is L=8.7mm, and there is a square ring array of gaps inside the closed square ring me...

Embodiment 2

[0056] The frequency selective surface structure unit provided by the embodiment of the present invention and the frequency selective surface structure composed thereof are versatile, and the resonant length is increased by further reducing the distance d between the metal lines and the width w of the metal strip, thereby reducing the resonant frequency ; It is also possible to increase the resonant frequency by appropriately increasing the distance d between the metal lines and the width w of the metal strip, so as to achieve the effect of filtering out electromagnetic waves of a certain frequency.

[0057] This example is to increase the spacing d between the metal lines and the width w of the metal strips and change the unit size L to reduce the resonance wavelength to filter out electromagnetic waves with a frequency of 5.1GHz. The thickness is 1mm, the dielectric constant is 4.3, and the tangent loss is 0.025 dielectric substrate, the number of square rings in the slit squ...

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Abstract

Disclosed herein are a frequency selective surface structure unit and a method for changing a resonance frequency and a wavelength thereof as well as a frequency selective surface structure, the frequency selective surface structure unit comprising: a dielectric substrate (1), a ring array (2) and a metal bar (3) located on a dielectric plane of the dielectric substrate (1); the ring array (2) comprises a closed loop metal wire (21) provided along four sides of the dielectric substrate (1) and slot ring arrays (22) which are arranged in the closed loop metal wire (21), share a same center with the closed loop metal wire (21) and are ranked in order; the slot ring arrays have two intersecting diagonal gaps which divide each of the slot loops of the slot ring array (22) into four different wires (221) in different directions. The metal bar (3) comprises a first metal bar (31), the first metal bar (31) is perpendicular to the closed loop metal wire (21) and each metal wire (221) of the slot ring array (22) in the direction corresponding to the first metal bar (31).

Description

technical field [0001] The invention relates to the communication field, in particular to a frequency selective surface structure unit and a frequency selective surface structure formed therefrom. Background technique [0002] In the process of implementing the technical solutions of the embodiments of the present application, the inventors of the present application at least found the following technical problems in the related art: [0003] With the rapid development of wireless communication, whether it is radar, electronic countermeasure technology, or personal communication system, its rapid development has played a role in promoting the microwave field. In many fields, a system is required to select the frequency of specific electromagnetic waves, such as: microwave filters, shielded boxes and shielded rooms, simple dipole frequency selective surfaces, etc. [0004] Among them, there are many types of microwave filters, including filters composed of lumped parameters,...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01P1/20
CPCH01P1/2002H01P1/20
Inventor王龙龙
OwnerXIAN ZHONGXING NEW SOFTWARE