Design Of Novel Metamaterials And Analysis Of Electromagnetics Characteristics

For the first time in 1967,Veselago predicted that a special coal with a constant permittivity and a real part of permeability is called a "left-handed material." With the structural array of metal rod(Rod)and Metal Resonant Ring(SRR)initially proposed by Pendry and Smith et al.Achieving the development of negative dielectric constant and negative magnetic permeability,in recent years,(CRLH TLs)structure of the left-handed material research is also more and more popular.At present,scholars at home and abroad have done a lot of computations and simulations on the singularity electromagnetic characteristics and structural design of the left-handed material such as the negative refractive index,the perfect lensing and the inverse Doppler shift.However,the finite difference time-domain The left-handed material electromagnetic properties and structural design of the left-handed materials have a very important application value in microwave and even terahertz field.In this paper,based on the traditional finite difference time domain algorithm,the difference scheme with loss factor is introduced.Some special electromagnetic properties of the left-handed material and the new design of the structure are analyzed and simulated.The main work of the thesis is divided into the following sections:1.The left-handed material usually has its dielectric constant and permeability both in the real and imaginary parts.In this paper,the finite-difference time-domain Form and validates that the left-handed material has two very important electromagnetic properties,namely negative refractive properties and perfect lensing phenomena.2.According to the formula of field intensity defined by optics,the factors influencing the field strength of the electromagnetic field are further discussed,including the loss factor and the thickness of left-handed material slab.This paper verifies that the permittivity and permeability of the left-handed material can produce the perfect lens phenomenon under the specific condition of-1 at the same time.The3.comparison between the left-handed material and the ordinary material showsthat the left-handed material does indeed have different electromagnetic properties,Research and application of foundation.4.Based on the theoretical research,a new type of UWB low loss left-handed material structure is designed.The theoretical and numerical simulations show that the-left-handed structure has a negative permittivity and a negative permeability.Compared with a single resonant ring structure,the combined structure of the novel resonant ring and the metal wire designed by the invention increases the bandwidth by 56.6%and the quality factor by about 60%,and is the application of the left-handed material in the microwave field such as the antenna and the filter And design provides important value.