Band stop type frequency selection surface based on low dielectric meta-material

Abstract

The invention discloses a band stop type frequency selection surface based on a low dielectric meta-material. The band stop type frequency selection surface comprises three layers of polymer medium substrates and air layers which are between two adjacent polymer medium substrate layers, the polymer medium substrates are etched into square aperture structures having different edges, the polymer medium substrates employ low dielectric low loss polymer medium substrates and are prepared to form a continuous period array, and FSS band stop characteristics can be developed and optimized through adjusting square unit structure edges. According to the band stop type frequency selection surface based on the low dielectric meta-material, the low dielectric polymer substrates are employed, any metal material is not contained, and advantages of low loss, high power capacity and low detectability are realized, moreover, band stop characteristics at a microwave band can be realized, simple design is realized, and strong adjustability is realized.

Description

technical field [0001] The invention relates to the technical field of microwave space filtering of all-dielectric metamaterials, in particular to a band-stop frequency selective surface based on low-dielectric metamaterials. Background technique [0002] Frequency Selective Surface (FSS for short) is a kind of spatial filter, which is a planar or curved surface array composed of periodically arranged scatterers, and exhibits one or more bandpass and bandstop characteristics for electromagnetic waves. The traditional frequency selective surface is a two-dimensional periodic structure composed of periodically arranged metal patch units or slot units. It is widely used in radar radomes and reflectors in microwave, infrared and other frequency bands because of its specific frequency selective characteristics. noodle. Metamaterials refer to some artificial composite structures or composite materials with extraordinary physical properties that natural materials do not have. It i...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing metamaterials and frequency-selective surfaces are composed of metal-structured periodic materials. Although metal-based metamaterials have their unique advantages, such as easy design and fabrication, and good compatibility with existing microwave electronic engineering processes, they also have certain Inherent disadvantages, such as not easy to extend to the micro-nano scale range, very sensitive to the parameter changes of the metal structure, high loss, strong anisotropy, etc.

The limitations of the physical properties of metal materials make metal-based metamaterials not perform well in terms of low detectability and corrosion resistance, and cannot meet the needs of high-tech indicators such as aviation and military.

Traditional low-dielectric materials generally exhibit band-pass characteristics in the microwave range, and few studies have shown that they can be designed as band-stop frequency-selective surfaces

Images