Permeability increasing device for incident electromagnetic waves and method for adjusting permeability through same

Abstract

The invention provides a permeability increasing device for incident electromagnetic waves and a method for adjusting the permeability through the same. The permeability increasing device comprises asubstrate medium and a metal grating which is used for changing the magnitude of the reflection and projection coefficients and the phase of the incident interface of the electromagnetic waves. The metal grating comprises a plurality of pieces of mutually-parallel strip-shaped metal, and the multiple pieces of strip-shaped metal are sequentially arranged at equal distances in the width direction of the substrate medium. The metal grating is arranged on one side of the substrate medium, and the electromagnetic waves are incident from the side where the metal grating is located and sequentiallypermeate through the metal grating and the substrate medium. According to the permeability increasing device, reflection can be remarkably reduced within the large width range of the substrate medium,and the transmissivity of the electromagnetic waves is increased; and meanwhile, the permeability of the electromagnetic waves can be adjusted by adjusting the width and the period of the metal grating. During specific using, only the target permeability needs to be set, then the appropriate width and period of the metal grating are found, and thus great convenience is brought to practical application.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave transmission, in particular to an anti-reflection device for incident electromagnetic waves and a method for adjusting transmittance by using the same. Background technique [0002] Electromagnetic waves will be reflected and transmitted when they are transmitted on the surface of different media, which is an important phenomenon in the field of optical applications. [0003] However, in many applications, due to the existence of insertion loss and Fabry-Perot effect, it is often necessary to reduce the reflection of electromagnetic waves by the medium, so that the transmitted energy can be maximized, so as to facilitate the transmission of information and so on. At present, there are mainly single-layer 1 / 4 dielectric film and multi-layer film for anti-reflection of the medium. However, these two methods need to meet the requirements of specific dielectric film thickness and refractive index....

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an anti-reflection device for incident electromagnetic waves and a method for adjusting the transmittance by using it, aiming at solving the problem that it is difficult to realize the anti-reflection of the substrate medium in a relatively simple manner when the electromagnetic wave is transmitted in the medium

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