Study On Electromagnetic Transmission Characteristics Based On Metamaterial Of Fractal Structure

Metamaterial generally refers to the electromagnetic bandgap structure material of the artificial design.It contains special properties which natural materials do not have.In the military field,metamaterial has a lot of potential application,which can greatly reduce the possibility of being detected by enemy and improve the viability in the combat.The purpose of the paper is to study the effect of fractal structure of metamaterial on electromagnetic transmission characteristics.Through theoretical modeling and software simulation,a new method to solve the problem of "being wide,light and thin" in stealth is proposed.The main contents of the paper are as follows:(1)The influence of the dimension change of fractal structure on the electromagnetic transmission;(2)The influence of the scale transformation of fractal structure on the electromagnetic transmission;(3)The influence of metamaterial with multimodal fractal combined structure on electromagnetic transmission.By simulating the fractal structure of Y type,we can see with the increase of the fractal dimension,the center frequency of the electromagnetic bandgap moves to the low frequency band,and the band above-5d B will be widened.Through the scaling of fractal structure in the same dimension,The center frequency of the bandgap can move to the right in the direction of high frequency,but the number of wave crests does not change.By changing the period of the fractal structure,the center frequency of the bandgap moves to the right in the direction of high frequency and the number of absorption peaks decreases.Through this feature,we can adjust the period,scale and dimension of the fractal structure,and make use of multi-dimensional combination and multi-scale combination to control the bandwidth and frequency of the electromagnetic bandgap.