ABSTRACT
The development of interferometric radar sensors for the application to Civil Engineering structures took place in the last fifteen years, and the effectiveness of this technique has been demonstrated in different case studies. In this paper, after a brief introduction dedicated to the working principle, the main characteristics of the currently available sensors are summarized and the results of two tests are used to demonstrate how the main technical features of the radar sensor are linked to the final performances of the measurement in terms of spatial and temporal resolution. Furthermore, the potential improvements achievable using an updated technology nowadays available off-the-shelf are discussed as well. Some comments are also dedicated to the few advanced sensors recently described in literature, their potentials and limits. The overall analysis is carried out with the goal of evaluating the limits and advantages of this technique from the view point of the user communities.
