A Broadband Frequency-Selective Surface for Planar Dual-polarization Millimeter Waves

A frequency-selective surface and dual-polarization technology, applied to antennas, electrical components, etc., can solve the problems of surface radome performance deterioration and large dielectric plate loss, and achieve the effects of light weight, low bandwidth, and low profile

Active Publication Date: 2021-04-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Application Information

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Problems solved by technology

However, in the millimeter-wave frequency band, the loss of the dielectric plate is large; in some high-power and high-temperature environments, the dielectric constant and other electrical properties of the dielectric substrate change with the temperature rise, and the performance of the frequency selective surface radome at this time will be greatly improved. deterioration

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  • A Broadband Frequency-Selective Surface for Planar Dual-polarization Millimeter Waves
  • A Broadband Frequency-Selective Surface for Planar Dual-polarization Millimeter Waves
  • A Broadband Frequency-Selective Surface for Planar Dual-polarization Millimeter Waves

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Embodiment Construction

[0019] In this embodiment, the frequency selective surface structure is as figure 1 , which is composed of the frequency selective surface units periodically arranged in an array on the two-dimensional plane, the unit structure is as follows figure 2 . The frequency selective surface material is tungsten copper, the thickness is 0.063λ, λ is the center frequency f 0 Corresponding wavelength in vacuum. Consists of a metal ring and 8 loading strips. The unit size is 0.55λ×0.55λ, it works in the W band, and the center frequency is f 0 . The frequency selective surface realizes specific frequency transmission or frequency reflection through a metal square ring structure and a groove structure surrounded by two strip-shaped dipoles protruding inward on each side of the ring structure. Laser cutting process is used for slotting on the entire metal plane; when used in lower frequency bands, CNC process or PCB corrosion process is used for processing.

[0020] Such as figure ...

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Abstract

The invention discloses a planar dual-polarized millimeter-wave broadband frequency selective surface, belongs to the technical field of antenna engineering, and relates to a dual-polarized frequency selective surface. The frequency selective surface is formed by splicing and combining frequency selective surface unit arrays. The frequency selective surface unit is a metal square ring structure, and each side of the ring structure is provided with two strip-shaped dipoles protruding inward: The first dipole and the second dipole, the height of the first dipole is greater than the second dipole, and the included angle between each dipole and its corresponding ring structure side is the same and not 90°, each dipole The direction of the acute angle opening between the sub and its corresponding ring structure side is consistent. The traditional ring unit is not suitable for the integrated connection structure and requires dielectric support; the traditional dipole-shaped unit has a small passband bandwidth and high in-band loss. By adopting the deformed square ring unit, the invention obtains the bandwidth similar to the traditional ring unit and lower in-band loss, and can be realized through metal processing.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering and relates to a dual-polarization frequency selective surface. Background technique [0002] Frequency selective surfaces (FSS) can perform spatial filtering of electromagnetic waves in space. Spatial filtering surfaces are usually designed from two-dimensional periodic structures. It can be divided into two types: patch type and slot type, which are structures corresponding to band-stop and band-pass selection characteristics. It can be applied in a radome to achieve low radar cross-section (RCS) characteristics of the antenna. For example, in the document "Thin 3-D Bandpass Frequency-Selective Structure Based on Folded Substrate for Conformal Radome Applications", a frequency selective surface with a multi-layer three-dimensional structure is proposed, which can be used in the radome to achieve the effect of RCS reduction. [0003] In addition, by arranging the frequency selectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0013H01Q15/0026
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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