Low Profile, Low Frequency Metamaterial for Sub-GHz Microwave Applications

Electromagnetic metamaterial is composites consisting of sub-wavelength structures designed to exhibit particular responses to an incident electromagnetic wave. In general, the electromagnetic metamaterial is at wavelength scale or sub-wavelength scale and these metameterial are applicable for high frequencies applications which fall into range from 10 GHz to 20 GHz.
The application of metamaterial for sub-GHz application is little discussed in the past decades. In this thesis, by incorporating novel structures (like 3D SRR (split ring resonator)) and new loading materials (like ferrite composite film), the unit cell size of metamaterial has been successfully scaled down. Small-scale unit cell allows electromagnetic metamaterial to have far greater flexibility in various applications. This thesis describes the design, mechanism and development of low profile, low frequency metamaterial for sub-GHz microwave applications.