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We study the problem of wave transport in a one-dimensional disorderedsystem, where the scatterers of the chain are $n$ barriers and wells withstatistically independent intensities and with a spatial extension $\l_c$ whichmay contain an arbitrary number $\delta/2\pi$ of wavelengths, where $\delta = kl_c$. We analyze the average Landauer resistance and transmission coefficientof the chain as a function of $n$ and the phase parameter $\delta$. For weakscatterers, we find: i) a regime, to be called I, associated with anexponential behavior of the resistance with $n$, ii) a regime, to be called II,for $\delta$ in the vicinity of $\pi$, where the system is almost transparentand less localized, and iii) right in the middle of regime II, for $\delta$very close to $\pi$, the formation of a band gap, which becomes ever moreconspicuous as $n$ increases. In regime II, both the average Landauerresistance and the transmission coefficient show an oscillatory behavior with$n$ and $\delta$. These characteristics of the system are found analytically,some of them exactly and some others approximately. The agreement betweentheory and simulations is excellent, which suggests a strong motivation for theexperimental study of these systems. We also present a qualitative discussionof the results.

Wave Transport in One-Dimensional Disordered Systems with Finite-Size Scatterers