Summary
International Symposium on Antennas and Propagation
2008
Session Number:2B03
Session:
Number:2B03-1
Artificial Surface Having Frequency Dependent Reflection Angle
Kihun Chang, Jihwan Ahn, Young Joong Yoon,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
The reflection coefficient phase of the electromagnetic bandgap (EBG) structure varies continuously from 180? to -180? through 0? at the surface resonant frequency, where the surface behaves as an artificial magnetic conductor (AMC). The EBG structure, first introduced and experimentally verified by Sievenpiper [1]- [2] has been realized by covering a metal ground plane with periodic metal-dielectric composite textures. By tuning the individual lattice of a periodic mushroom type texture in order to vary the surface impedance, the surface with reflection phase gradient as a function of position can be designed. Using a linear phase gradient across the face, the artificial surface having a steered reflection is proposed. Since the reflection phase curve is dependent on frequency, this metasurface reveals a frequency dependent reflection angle.