Dissipative Broadband Frequency Selective Surface Radome

Abstract

The invention provides a dissipative wideband frequency selective surface radome, which comprises a first skin layer, a first frequency selective layer, a first core layer, a second frequency selective layer and a second core layer arranged in sequence along the thickness direction , the third frequency selection layer and the second skin layer: the first frequency selection layer and the third frequency selection layer are the same, both of which are composed of the first metal unit layer attached to a dielectric layer, including a plurality of first FSSs arranged periodically unit, the first FSS unit is an improved cross-shaped slit unit structure, on the basis of the cross-shaped slit unit structure, a L shaped gap; the second frequency selection layer is composed of a second metal unit layer attached to a dielectric layer, including a plurality of second FSS units arranged periodically, and the second FSS unit is a rectangular metal patch structure. The solution of the invention solves the problem that the existing frequency selective surface radome is difficult to realize the steep cut-off of the passband window and the transition band is relatively wide.

Description

technical field [0001] The invention provides a dissipative broadband frequency selective surface radome, which belongs to the technical field of electromagnetic field and microwave. Background technique [0002] Improving the survivability and overall combat effectiveness of weapons is the focus of general attention in the military industry of various countries. Stealth technology is an effective penetration method developed according to the characteristics of radar work. As a strong scattering source on weapons and equipment, the radar antenna needs to meet the requirements of high penetration in the passband and high stealth in the stopband, and the transition zone between the passband and the stopband should be as small as possible. . Designing a radome that satisfies engineering applications according to actual working conditions is a major technical problem in the stealth design of various weapon platforms. [0003] Traditional dielectric radomes can achieve high wa...

AI Technical Summary

Problems solved by technology

Usually in the electrical performance design of wave-transparent / stealth radome, the frequency selective surface (FSS) technology is used, but the general frequency selective surface is difficult to achieve a steep cut-off of the passband window, the transition band is wide, and the stealth performance of the radome is difficult. ensure

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