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Single-layer broadband frequency selection wave absorber with notch band

A frequency-selective and frequency-selective surface technology, applied in the field of absorbing materials, can solve the problem of polarization sensitivity of absorbing structures, and achieve the effect of low cost, easy processing and small unit size

Pending Publication Date: 2021-10-01
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing notch-type frequency selective absorbers are mainly two-dimensional structures using two-layer dielectric plates, and a few absorbing structures that use a single-layer dielectric to achieve notch response also have the problem of polarization sensitivity, which cannot meet actual needs

Method used

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  • Single-layer broadband frequency selection wave absorber with notch band
  • Single-layer broadband frequency selection wave absorber with notch band
  • Single-layer broadband frequency selection wave absorber with notch band

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] refer to figure 1 As shown, the present invention includes providing a notch-type frequency selective absorber, and the minimum unit of the absorber is the absorber unit. The absorbing unit includes a dielectric board 2, an absorptive frequency selective surface arranged on the upper surface of the dielectric board, a metal reflector 4 and a PMI foam board 3 arranged between the dielectric board and the metal reflector.

[0039] The absorptive frequenc...

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Abstract

The invention provides a single-layer broadband frequency selective wave absorber with a notch band, which comprises a wave absorbing unit, and the wave absorbing unit comprises an absorptive frequency selective surface, a dielectric plate, a foam plate and a metal reflecting plate which are sequentially arranged from top to bottom; the absorptive frequency selective surface is a metal coating layer and comprises an octagonal annular strip, and the octagonal annular strip comprises side edges I and side edges II; the side edges I and the side edges II are arranged at an interval, and the side edge II is parallel or vertical to the four edges of the dielectric plate; four side edges I of the octagonal annular strip are electrically connected with chip resistors in the forward direction; the inner sides of the four side edges II are vertically and electrically connected with rectangular ring strips; and the inner side of the rectangular ring strip is surrounded and electrically connected with a meandering line strip. The frequency selection wave absorber with the notch band is simple in structure, wide in absorption frequency band, adjustable in notch band, stable in polarization, stable in incident angle and easy to manufacture, and can be used for a ground plane of an antenna and reducing the radar cross section of the antenna.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to a wave-absorbing material and a frequency-selective surface, in particular to a single-layer broadband frequency-selective wave-absorbing body with notch bands. Background technique [0002] With the rapid development of electromagnetic wave communication equipment, the influence of electromagnetic waves on communication and military fields is increasing. It is necessary to control the reflection of electromagnetic waves while ensuring normal communication to improve communication efficiency, improve stealth technology and eliminate electromagnetic wave interference. The emergence of absorbing materials makes the above problems better solved. Absorbing material refers to a class of materials that can absorb or greatly weaken the electromagnetic wave energy received by its surface, thereby reducing the interference of electromagnetic waves. In engineering applica...

Claims

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Application Information

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IPC IPC(8): H01Q17/00H01Q15/00H01Q15/14
CPCH01Q17/00H01Q15/0013H01Q15/14
Inventor 张冠茂李智航李仲贤伦雨鹏索军红车宗娥岳娟冯银海朱敬慈张茜翟明洋
Owner LANZHOU UNIVERSITY
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