Abstract
The underground radar is used as a nondestructive and non-contact surveying method for imagining complicated underground structures such as stratums and buried objects. However, in order to detect objects from underground radar images with sufficient accuracy, a lot of experience and knowledge of an expert is necessary. Therefore, to make the detection easy, it would be helpful to know how the shape of observation waves received by the underground radar varies with for the shape of underground objects. In this paper, electromagnetic fields for circular underground objects with various diameters are simulated with FDTD method. The shape of the received wave signal is examined with the change of the of underground object diameter by using Fourier analysis.
