Super-resolving negative-refractive-index transmission-line lenses
By: by Anthony Grbic.
Published: 2006
Language: eng
Number of pages: 212
ISBN-13: 9780494157923
Description: This thesis presents an experimental negative-refractive-index (NRI) lens that overcomes the diffraction limit. The NRI lens is shown to have three times the resolving capability of a conventional curved lens operating at 1.057 GHz. The NRI lens consists of a two dimensional (2D) network of microstrip transmission lines loaded with series capacitors and shunt inductors. The network is referred to as a 2D dual transmission line. The 2D dual transmission line exhibits isotropic and homogeneous backward-wave characteristics, and therefore can be said to have a negative refractive index. In order to properly design the NRI lens, the propagation characteristics of the 2D dual TL are derived. Bloch analysis of a generalized 2D periodic electrical network is performed and the results are subsequently applied to the 2D dual TL. >From these results, the 2D periodic Greens functions of the lens are found so that the performance of the lens can be theoretically predicted. The theoretical lens performance is then compared to the experimental lens performance and good agreement is shown. Finally, a new three dimensional NRI medium is presented that exhibits isotropic and homogeneous backward-wave propagation for all directions of propagation and polarization. The medium is a network of reactively loaded transmission lines in three dimensions.
Notes: Source: Dissertation Abstracts International, Volume: 67-06, Section: B, page: 3325.

Advisor: George V. Eleftheriades.

Thesis (Ph.D.)--University of Toronto, 2006.

Includes bibliographic references.

Electronic version licensed for access by U. of T. users.