apl paper

The following papers seems to be interesting.
It proposes a new concept and I would like to have it if possible.

Coplanar waveguide metamaterials: The role of bandwidth modifying slots

Appl. Phys. Lett. 91, 113517 (2007); DOI:10.1063/1.2784965

by

Ibraheem A. Ibraheem and Martin Koch