The Research of Metamaterials and Their Applications in Microwave Frequencies

• Main Authors: Luen-Kang Lin, 林綸康
• Other Authors: Cheng-Chi Yu
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/41636503589890626139

碩士 === 逢甲大學 === 通訊工程所 === 96 === With the progress of technology, some physical limitations were broken slowly. Materials in nature all have positive permittivity (ε) and permeability (μ). Those materials follow the Doppler effect and Snell’s law. Until 1968, Veselago proposed an artificial material that has negative permittivity and permeability at the same time. This discovery has totally broken the scientific cognition of material’s characteristic. A lot of technologies those can''t be reached in the past all have possibility to be realized now. Such special material is called metamaterails. This thesis proposed one kind of metamaterials, the structure is called electromagnetic band-gap structure (EBG). We can get the passband and stopband characteristics by proper arranging periodic structure. We will also research the applications of EBG in microwave frequencies, including the structures combined with antenna for size reducing, and solving coupling problem between array antennas by its suppressing surface wave property.