Dielectric Characteristics of Unsaturated Loess and the Safety Detection of the Road Subgrade Based on GPR

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Frequency</td><td class="align_center">2 GHz</td><td class="align_center">900 MHz</td><td class="align_center">400 MHz</td></tr><tr><td class="align_left">Emissivity</td><td class="align_center">350 kHz</td><td class="align_center">100 kHz</td><td class="align_center">100 kHz</td></tr><tr><td class="align_left">Ranges (ns)</td><td class="align_center">12</td><td class="align_center">20</td><td class="align_center">40</td></tr><tr><td class="align_left">Scanning speed (scan/s)</td><td class="align_center">300</td><td class="align_center">50</td><td class="align_center">50</td></tr><tr><td class="align_left">Gain</td><td class="align_center">1</td><td class="align_center">2</td><td class="align_center">5</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>The antenna parameters of GPR.</div>

Journal of Sensors

tab1

Table 1

Table 1: Dielectric Characteristics of Unsaturated Loess and the Safety Detection of the Road Subgrade Based on GPR 