On-chip And Antenna Applications For Anisotropic Metamaterials

In recent years,related research in the field of electromagnetic metamaterials and applications has received great attention.Metamaterials have many electromagnetic properties that natural materials do not have,and thus many novel electromagnetic devices can be realized,including reverse wave devices,stealth coats,superstructure surfaces,antennas,and the like.Based on electromagnetic metamaterials,this dissertation uses its anisotropy and double anisotropy properties to study the application of on-chip and antenna.The specific contents include:1.The research background and current situation of metamaterials are introduced.The typical electromagnetic properties of metamaterials are described.The categories of early metamaterials are described.The theory of electromagnetic wave directional radiation based on metamaterials is introduced.The antenna is introduced.The related theory lays the foundation for the application of metamaterials on the chip and in the antenna.2.Based on the anisotropic metamaterial,a rectangular wave periodic plate with electromagnetic wave directional radiation in the microwave frequency band is designed and implemented.The eigenmode simulation is performed on the periodic cell structure,and the approximate dispersion relation at the macroscopic level is drawn.According to the dispersion relation,the range of the angle of propagation of the electromagnetic wave is predicted and approximated,and the conclusion of the directional radiation is obtained.3.This dissertation designs and implements an on-chip electromagnetic chopper device that can intercept electromagnetic wave propagation and observe it.Rotate the coordinate system in the dispersion relationship of the periodic unit so that the incident wave cannot be reflected and refracted.The rectangular periodic flat plate “splits” along the diagonal to form a triangular periodic structure with a hypotenuse,similar to the coordinate system rotating 45 degrees.At this time,the electromagnetic wave stays on the hypotenuse.This dissertation demonstrates this electromagnetic chopping effect of anisotropic metamaterials through simulation and experiments.4.Based on the electromagnetic isolation effect of metamaterials with magnetoelectric coupling characteristics,this dissertation also combines a split-resonant ring(SRR)structure with a monopole.Using SRR has a high Q value and is easy to achieve narrow band characteristics.Antenna with directional radiation at the edges.The SRR structure is symmetrical.It is loaded on the antenna,and the current distribution is in the same amplitude and in phase.The SRR branches work together and are easy to generate side shots.Through simulation,the miniaturized antenna designed in this dissertation has the characteristics of dual frequency narrowband and strong directivity,which is very suitable for practical applications.5.Designed and processed an X-band directional radiating antenna based on the SRR structure.The introduction of the unit structure breaks the structural symmetry and has a strong magnetoelectric coupling effect.The antenna achieves directional radiation without any metal as a retro-reflector.