Design of broadband ultrathin transparent wave absorber

Abstract

The invention discloses a broadband ultrathin transparent wave absorber design, which comprises an ITO film and a plurality of wave absorbing units, the bottom of the ITO film is fixedly provided with the plurality of wave absorbing units, and each wave absorbing unit is composed of three ultrathin resistive film resonators, three polyethylene glycol terephthalate (PET) films and three polyvinyl chloride films. The three ultra-thin resistive film resonators are uniformly deposited on the tops of the three polyethylene glycol terephthalate (PET) films, the ultra-thin resistive film resonator on the top and the ultra-thin resistive film resonator in the middle are separated by a polyvinyl chloride film, and the thickness range of the polyvinyl chloride film is 2.5-3.5 mm. The ultra-wide-spectrum wave-absorbing material is designed on the basis of the double wave-absorbing structure layers and in combination with the square resistance of the resistive film, wave-absorbing peaks at low frequency, intermediate frequency and high frequency are achieved by reasonably selecting the surface resistance value and structure parameters of the resistive film, the low-frequency absorption strength is enhanced, the overall wave-absorbing bandwidth is widened, and the wave-absorbing performance at 4.6-24.4 GHz can be smaller than-10 dB.

Description

technical field [0001] The invention relates to a wave-absorbing body, in particular to a design of a broadband ultra-thin transparent wave-absorbing body, and belongs to the technical field of communication. Background technique [0002] The continuous development of communication technology has provided convenience to people's life, but also has an impact on people's life, such as: electromagnetic wave radiation. The impact of electromagnetic wave radiation mainly includes two aspects: First, the electromagnetic waves radiated by instruments and meters will interfere with the normal operation of other equipment and cause them to fail. For example, using a mobile phone on an airplane will affect the instruments and meters of the airplane; The jammer interferes with the signal of the mobile phone, so that it cannot be used normally. The second is that excessive electromagnetic radiation will damage the safety and health of the human body. For example, it will have varying d...

AI Technical Summary

Problems solved by technology

[0008] Through the above introduction, most metamaterial absorbers working in the microwave frequency band still have problems such as insufficient absorption rate, complex structure, and the absorption bandwidth needs to be further improved.

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