Non-destructive inspection of buried object in concrete structures based on improved propagation path model using microwave radar

In this report, a propagation time estimation method and a propagation path model for inner concrete structure inspection based on the microwave radar technique have been considered. In particular, an improved propagation path model has been newly proposed, and a validity of propagation time derived from the cross-correlation processing has been evaluated by using the proposed propagation path model. Furthermore, a necessity of a propagation time estimation method considering a phase shift will be discussed.