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Most of Ground Penetrating Radars (GPR) are pulsed system, nevertheless there are a number of applications for which Continuous Wave Step Frequency (CWSF) radar can be advantageous. Generally speaking, CWSF systems are more complex then pulse radar, but they can manage larger bandwidth, have larger time efficiency and better control of the band. Furthermore, power, integration time and step of each...
Within the RiSEM project (Seismic Risk of Monumental Building) two different kinds of GPR measurements were performed. The first one was carried out by using an ultra dynamic range — ultra high resolution GPR in order to investigate the presence of hypogeal structures under the “Piazza della Cisterna” (Cistern Square). The second one was carried out by using a non contact 4–8 GHz GPR system specifically...
In this paper the authors present an ultra high resolution and high dynamic range stepped frequency continuous wave radar for masonry investigations. The radar architecture is based on a couple of VCO in a PLL loop and a low noise receiver. This approach is able to cover with 801 steps the 4–8 GHz frequency range obtaining a theoretical range resolution of 37.5 mm in air and a dynamic range higher...
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