  Phenomenological AdS/QCD models, like hard wall and soft wall, provide
hadronic mass spectra in reasonable consistency with experimental and (or)
lattice results. These simple models are inspired in the AdS/CFT correspondence
and assume that gauge/ gravity duality holds in a scenario where conformal
invariance is broken through the introduction of an energy scale.
  Another important property of hadrons: the decay constant, can also be
obtained from these models. However, a consistent formulation of an AdS/QCD
model that reproduces the observed behavior of decay constants of vector meson
excited states is still lacking. In particular: for radially excited states of
heavy vector mesons, the experimental data lead to decay constants that
decrease with the radial excitation level.
  We show here that a modified framework of soft wall AdS/QCD involving an
additional dimensionfull parameter, associated with an ultraviolet energy
scale, provides decay constants decreasing with radial excitation level. In
this version of the soft wall model the two point function of gauge theory
operators is calculated at a finite position of the anti-de Sitter space radial
coordinate.
