Overcoming the Diffraction Limit with a Planar Left-Handed Transmission-Line Lens
Abstract
We report experimental results at 1.057GHz that demonstrate the ability of a planar left-handed lens, with a relative refractive index of -1, to form images that overcome the diffraction limit. The left-handed lens is a planar slab consisting of a grid of printed metallic strips over a ground plane, loaded with series capacitors (C) and shunt inductors (L). The measured half-power beamwidth of the point-source image formed by the left-handed lens is 0.21 effective wavelengths, which is significantly narrower than that of the diffraction-limited image corresponding to 0.36wavelengths.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2004
- DOI:
- Bibcode:
- 2004PhRvL..92k7403G
- Keywords:
-
- 78.20.Ci;
- 41.20.Jb;
- 42.25.Fx;
- Optical constants;
- Electromagnetic wave propagation;
- radiowave propagation;
- Diffraction and scattering