  This paper presents experimental verification of below-cutoff transmission
through miniaturized waveguides whose interior is coated with a thin
anisotropic metamaterial liner possessing epsilon-negative and near-zero (ENNZ)
properties. These liners are realized using a simple, printed-circuit
implementation based on inductively loaded wires, and introduce an HE$_{11}$
mode well below the natural cutoff frequency. The inclusion of the liner is
shown to substantially improve the transmission between two embedded
shielded-loop sources. A homogenization scheme is developed to characterize the
liner's anisotropic effective-medium parameters, which is shown to accurately
describe a set of frequency-reduced cutoffs. The fabrication of the lined
waveguide is discussed, and the experimental and simulated transmission results
are shown to be in agreement.
