Title :
A novel planar structure of double negative material
Author :
Zhang, Zhongxiang ; Xu, Shanjia
Author_Institution :
Univ. of Sci. & Technol. of China, Hefei
Abstract :
Based on the composite right/left-handed transmission line (CRLH-TL) theory, a novel unit of planar distributed structure with double negative material (DNM) is proposed. The present unit cell implemented with microstrip structure has composite structure on single-layer but not two layers as did before. By using interdigital capacitor instead of the former mushroom structure with caps, the structure has descended the left-handed transmission frequency band than the former one. And the equivalent circuit parameters have been extracted from full-wave simulation. A 15x5 unit-cell DNM lens structure interfaced with two parallel-plate waveguides is designed. The focusing /refocusing effect of the lens is observed by full-wave simulation.
Keywords :
composite materials; metamaterials; microstrip components; microwave materials; parallel plate waveguides; planar waveguides; transmission line theory; CRLH-TL theory; composite right-left-handed transmission line; double negative material; equivalent circuit parameter; focusing-refocusing effect; full-wave simulation; interdigital capacitor; microstrip structure; parallel-plate waveguides; planar distributed structure; unit-cell DNM lens structure; Capacitors; Circuit simulation; Composite materials; Equivalent circuits; Frequency; Lenses; Microstrip; Optical design; Planar transmission lines; Transmission line theory; Double negative material (DNM); indexe (NRI); left-handed material (LHM); negative refractive;
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429643
