Title :
2.5-D stacked composite right/left-handed metamaterial structures using dielectric resonators and parallel mesh plates
Author :
Tetsuya Ueda ; Michishita, Naobumi ; Lai, Anthony ; Akiyama, Masahiro ; Itoh, Tatsuo
Author_Institution :
Kyoto Institute of Technology, 606-8585, Japan
Abstract :
In this paper, stacked structures composed of mesh plates and dielectric layers including 2-D array of dielectric discs are proposed as a new type of volumetric composite right/left-handed metamaterial structure for TE-polarized waves. No band gap condition between right and left-handed bands is designed in order to broaden the left-handed bandwidth by adjusting the aperture size of the mesh. Based on this layered metamaterial structure, a flat focusing lens which operates in free space is designed and fabricated. For a source launched from a small loop antenna, beam focusing through the fabricated finite-cell-layered lens is experimentally confirmed by measuring the field profiles.
Keywords :
composite materials; dielectric resonator antennas; electromagnetic wave polarisation; lens antennas; loop antennas; metamaterials; TE-polarized waves; beam focusing; dielectric resonators; finite-cell-layered lens fabrication; left-handed metamaterial structures; loop antenna; parallel mesh plates; stacked composite right metamaterial structures; Antennas and propagation; Dielectric losses; Dielectric resonator antennas; Focusing; Geometry; Lenses; Metamaterials; Optical design; Structural discs; Tellurium; Dielectric resonators; lenses; parallel plate waveguides;
Conference_Titel :
Microwave Symposium Digest, 2008 IEEE MTT-S International
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-1780-3
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2008.4633171
