An Electromagnetic Absorption Structure with Wide Incidence Angle

Abstract

The invention discloses an electromagnetic absorption structure with a wide incident angle, comprising an ITO pattern layer, a substrate, a dielectric loss layer and a good conductor layer stacked from top to bottom, wherein the substrate, the dielectric loss layer and the good conductor layer are respectively rectangular plates, and The substrate, the dielectric loss layer and the good conductor layer are completely overlapped from top to bottom. The ITO pattern layer is composed of a first ITO structure and a second ITO structure. The first ITO structure includes fourteen rectangular ITOs and an I-shaped ITO. The second ITO structure The ITO structure is located on the left side of the first ITO structure, and the two are left-right symmetrical structures; the advantage is that when the incident angle is in the range of 0° to 80°, it has a good absorption effect on the TE mode electromagnetic waves. When the incident angle ranges from 0° to 70°, the electromagnetic wave absorption rate at the frequency point 9.5GHz is stable above 98%, and when the incident angle ranges from 70° to 80°, the electromagnetic wave absorption efficiency in TE mode is stable at 9.5GHz. above 90%.

Description

technical field [0001] The present invention relates to an electromagnetic absorption structure, in particular to an electromagnetic absorption structure with a wide incident angle. Background technique [0002] Electromagnetic stealth technology is widely used in military equipment and electronic countermeasures, and plays an important role in improving the battlefield survivability of aircraft and ships. The purpose of electromagnetic stealth technology is to reduce the radar scattering characteristics of one's own target, so as to achieve low detectability of one's own target. One of the main technical approaches is to use electromagnetic absorbing materials or structures to absorb the radar waves incident on the surface of the equipment to reduce radar waves. Reflected waves, thereby achieving stealth. [0003] In recent years, with the diversification of detection methods and deployment orientations of reconnaissance and electronic countermeasure systems, multi-functio...

AI Technical Summary

Problems solved by technology

The above structure is only suitable for the absorption of TM mode electromagnetic waves. In addition, due to its non-planar mushroom-shaped structure design and the introduction of resistive lumped elements, the processing complexity is greatly increased.

Therefore, for TE mode electromagnetic waves, the realization of electromagnetic absorbing structures with good absorbing functions covering wide incident angles simultaneously remains challenging.

Images