This paper discusses the general concept of using metamaterials in microwave lenses. The different optics afforded by the inclusion of metamaterials in the lens structure produce new features such as reduced size and new beam formations. The use of negative refractive index materials is discussed in reference to the original concept of the perfect lens, leading to the Rotman lens and the Luneburg lens. In Rotman lens, negative refractions help reducing the lens size and a broadband electromagnetic band gap (EBG) surface is used to prevent reflections off the sidewalls. Verification of negative refraction and simulation of isotropic material performance are presented, as well as an example of broadening the band of an EBG surface.

Date Published: 21 June 2011
PDF: 9 pages
Proc. SPIE 8021, Radar Sensor Technology XV, 80210R (21 June 2011); doi: 10.1117/12.887991

Published in SPIE Proceedings Vol. 8021:
Radar Sensor Technology XV
Kenneth I. Ranney; Armin W. Doerry, Editor(s)