In this study, numerical analyses concerning the propagation of electromagnetic waves in concrete were carried out for examining the effects of various factors and for improving the accuracy of inspection for inclusions embedded in concrete by radar, by using finite-difference time-domain (FDTD) method. As the results, the validity of applying FDTD method to the radar analysis by electromagnetic waves was confirmed, and a treatment method for easy judgement of the location of reinforcing bars was suggested by the numerical results concerning the propagation property of reflected electromagnetic wave against reinforcing bars.
