Electromagnetic absorption structure with wide incident angle

Abstract

The invention discloses an electromagnetic absorption structure with a wide incident angle. The electromagnetic absorption structure comprises an ITO pattern layer, a substrate, a dielectric loss layer and a good conductor layer which are stacked from top to bottom, wherein the substrate, the dielectric loss layer and the good conductor layer are rectangular plates, the substrate, the dielectric loss layer and the good conductor layer completely coincide from top to bottom, the ITO pattern layer is composed of a first ITO structure and a second ITO structure, the first ITO structure comprises fourteen rectangular ITO and an I-shaped ITO, the second ITO structure is located on the left side of the first ITO structure, and the second ITO structure and the first ITO structure are of a bilateral symmetry structure. According to the invention, the TE-mode electromagnetic wave absorbing effect is good when the incident angle ranges from 0 degree to 80 degrees, wherein when the incident angle of the TE-mode electromagnetic wave ranges from 0 degree to 70 degrees, the electromagnetic wave absorbing rate at the frequency point 9.5 GHz is stabilized to be 98% or above, and when the incident angle ranges from 70 degrees to 80 degrees, the TE-mode electromagnetic wave absorbing rate at the frequency point 9.5 GHz is stabilized to be 90% or above.

Description

technical field [0001] The 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, ships, etc. The purpose of electromagnetic stealth technology is to reduce the radar scattering characteristics of one's own target 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 the radar wave. Reflecting waves, thereby achieving stealth. [0003] In recent years, with the diversification of detection means and deployment orientations of reconnaissance and electronic countermeasure systems, multi-functional electro...

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.

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