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The concept of UWB 2DC tile as a practical implementation of UWB 2DC was proposed in the previous research. In this paper, we evaluate the feasibility of OFDM signal transmission through a two-dimensional communication (2DC) sheet in the high-band of ultra-wide band (UWB). First, we examine the effect of a thick surface insulator put on the sheet that weakens the connection between the 2DC sheet and the device on the surface insulator. Experiments are conducted to clarify the physical property of the connection. Second, we examine signal transmission via the 2DC sheet with a pair of UWB communication devices. Based on the both experimental results, we ensure that OFDM UWB 2DC is feasible with a practical carpet material on the sheet.