  We evaluate the phase-coherent transport of electrons along linear structures
of varying length, which are made from two types of potential wells set in
either a periodic or a Fibonacci quasi-periodic sequence. The array is
described by a tight-binding Hamiltonian and is reduced to an effective dimer
by means of a decimation-renormalization method, extended to allow for
connection to external metallic leads, and the transmission coefficient is
evaluated in a T-matrix scattering approach. Parallel behaviors are found for
the energy dependence of the density of electron states and of the
transmittivity of the array. In particular, we explicitly show that on
increasing its length the periodic array undergoes a metal-insulator transition
near single occupancy per dot, whereas prominent pseudo-gaps emerge away from
the band center in the Fibonacci-ordered array.
