Abstract
In radar technology, subsurface radar has found many important applications to identify various target objects, such as, cables for optical fiber communications, gas and water pipes. But due to dispersion and randomness of the underground media, it is difficult to presume an exact location and shape of the buried objects. And there is only a marginal improvement of detection characteristics reported in the literature and should be improved further.
In this study, we carried out experiments on subsurface radar with scale model which facilitate comparing real scale model with computer simulations. We used the impulse radar as subsurface radar. In real scale, we considered to use 1.5ns impulse and decided the size of scale for the present experiment. A scale size of one-third and 0.5ns impulse as transmitted wave have been used.
Transmitting and receiving antennas have been designed and the antennas are of Bow-Tie type which are commonly known as wide-band antennas. We measured the radiation pattern and frequency characteristics of these antennas and confirmed the applicability of use these antennas as subsurface radar antenna. We also measured the characteristics of soil. We used dry sand as soil and propose an easy way to measure the characteristics of the soil using a monopole-antenna. Various scattered waves using several targets have been investigated.
