標題: A Spatial Beam Splitter Consisting of a Near-Zero Refractive Index Medium
作者: Hwang, Ruey-Bing
Hsu, Neng-Chieh
Chin, Cheng-Yuan
電機工程學系
Department of Electrical and Computer Engineering
關鍵字: Metamaterial;near-zero refractive index medium;periodic structures;spatial beam splitter
公開日期: 1-一月-2012
摘要: A novel metamaterial-based beam splitter is demonstrated in this communication. The metamaterial is a three-dimensional (3 D) fishnet structure arranged in a two-dimensional (2 D) square lattice. According to Snell's law, the refracted wave from medium into air tends to be normal to the interface if the effective refractive index of medium is approximately zero. In light of this concept, the study presents a metamaterial with near-zero effective refractive index and an internal line source inside as excitation. Metallic flares with specific tilting angle were installed at four sides of the beam splitter to reduce reflection coefficient and match the impedance of the fishnet structure and free space. In addition to calculating the phase relation of eigenwaves in the metamaterial, this study measures the radiation patterns to verify its spatially beam-splitting characteristics.
URI: http://dx.doi.org/10.1109/TAP.2011.2167913
http://hdl.handle.net/11536/15328
ISSN: 0018-926X
DOI: 10.1109/TAP.2011.2167913
期刊: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume: 60
Issue: 1
起始頁: 417
結束頁: 420
顯示於類別:期刊論文


文件中的檔案:

  1. 000298887300050.pdf