Millimeter wave broadband high-efficiency frequency selection structure with simple structure

A technology with frequency selection and simple structure, which can be applied to waveguide devices, electrical components, circuits, etc., and can solve the problems of large loss of dielectric plates, unfavorable conformality, and changes in electrical characteristics.

Inactive Publication Date: 2019-10-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the frequency selective surface is processed by dielectric board (PCB) process, however, in the mmWave frequency band, the dielectric board is lossy, its electrical characteristics change with temperature, and it is not conducive to achieving conformality when used in radome

Method used

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  • Millimeter wave broadband high-efficiency frequency selection structure with simple structure
  • Millimeter wave broadband high-efficiency frequency selection structure with simple structure
  • Millimeter wave broadband high-efficiency frequency selection structure with simple structure

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Embodiment Construction

[0017] In this embodiment, the frequency selective surface structure is as figure 1 , consisting of multiple frequency selective surface units arranged periodically on a two-dimensional plane, the unit structure is as follows figure 2 . The process used is laser cutting, the frequency selection surface material is copper, and the thickness is 0.2mm. Unit size is 1.75×1.75mm 2 , working in the W band, composed of a surrounding metal structure 1 and a crossed butterfly dipole slot 2 set inside.

[0018] image 3 The performance comparison of the transmittance between the frequency selective surface of the present invention and the traditional dipole-shaped and annular aperture-type frequency selective surface is given. As can be seen from the figure, the butterfly dipole structure in the present invention has a passband bandwidth comparable to that of the ring structure, which is much higher than the traditional dipole-shaped frequency selection surface; the in-band loss is...

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Abstract

The invention discloses a millimeter wave broadband high-efficiency frequency selection structure with a simple structure and belongs to the technical field of antenna engineering. The millimeter wavebroadband high-efficiency frequency selection structure is a single-layer metal structure and is formed by a plurality of surface elements in a two-dimensional periodic arrangement, and each surfaceunit comprises a square metal ring and protruding branches extending from four corners of the square metal ring toward the center. A frequency selective surface is processed by a pure metal material,the frequency selective surface has low in-band loss and is easy to conformal, and the frequency selective surface is suitable for an application in a millimeter wave band such as a millimeter wave radome. The frequency selective surface unit is an aperture type and is a pass band near a resonance point. The shape of an aperture is a butterfly dipole, the bandwidth is much larger than that of a conventional dipole, the aperture is comparable with an annular aperture, however, the annular aperture has a broken metal structure, and the annular aperture cannot be processed by using a pure metal material. By using the frequency selective surface as the radome, the radiation characteristics of an antenna is almost not affected, and the loss is about 0.5 dB.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering and relates to a frequency selective surface. Background technique [0002] Frequency selective surfaces (FSS) can filter electromagnetic waves in space. By arraying frequency-selective surface units of different sizes to form metamaterials with specific reflection / transmission phase distributions, and using feed sources, such as horn antennas, to irradiate the metamaterials, reflective / transmissive array antennas with high gain can be realized. For example, in the literature "Nonuniform FSS-BackedReflectarray With Synthesized Phase and Amplitude Distribution" and "Ku-BandTransmitarrays With Improved Feed Mechanism", high-gain reflective array and transmissive array antennas based on frequency selective surfaces were respectively proposed. Since no additional power division The feed network has the advantages of simple structure and high efficiency. In addition, designing a radome wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20
CPCH01P1/20
Inventor 屈世伟李鹏发彭军杰李小秋杨仕文孙红兵周志鹏
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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