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Broadband frequency selection surface for planar dual-polarization millimeter waves

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

Active Publication Date: 2020-03-27
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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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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  • Broadband frequency selection surface for planar dual-polarization millimeter waves
  • Broadband frequency selection surface for planar dual-polarization millimeter waves
  • Broadband frequency selection 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 broadband frequency selection surface for planar dual-polarization millimeter waves, belongs to the technical field of antenna engineering, and relates to a dual-polarizationfrequency selection surface. The frequency selection surface is formed by splicing and combining frequency selection surface unit arrays. The frequency selection surface unit is of a metal square annular structure. Each side of the annular structure is provided with two strip-shaped dipoles which extend inwards: a first dipole and a second dipole, wherein the height of the first dipole is largerthan that of the second dipole, the included angles between the dipoles and the corresponding annular structure edges are the same and are not 90 degrees, and the opening directions of acute angles formed by the dipoles and the corresponding annular structure edges are consistent. A traditional annular unit is not suitable for an integrated connection structure and needs to be supported by a medium. A traditional dipole-shaped unit is small in passband width and high in in-band loss. By adopting the deformed square annular unit, the bandwidth similar to that of a traditional annular unit and the lower in-band loss are obtained, and the method can be achieved through metal machining.

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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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 ELECTRONIC SCI & TECH OF CHINA
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