A magnetic field controlled negative-index microwave lens

✍ Scribed by R. V. Petrov; R. Pandey; G. Srinivasan; M. I. Bichurin

• Book ID: 102518922
• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 391 KB
• Volume: 50
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.23847

✦ Synopsis

Abstract

A three‐dimensional lens with magnetic field control of the index of refraction and focal length has been designed and characterized over 2‐18 GHz. The lens is made of a lattice of cross‐wire resonators and ferrite cubes. For the lattice without the ferrite cubes, a refractive index n ≈ −1 is measured at 11.25 GHz. With the introduction of ferrite cubes in the lattice, n could be tuned over the range −1.2 to +1.8 for nominal bias magnetic fields H. The focal point for the lens with n ≈ −1, for example, could be displaced by 2 cm by tuning H from 4100 to 4125 Oe. Theoretical estimates of the lens characteristics are in agreement with the data. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2804–2807, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23847