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This article presents characterization of terahertz (THz) wireless channel inside a desktop size metal enclosure with the consideration of several different scenarios. Measurements indicate that both traveling wave and resonating modes exist inside the metal enclosure. Measurements for line-of-sight (LoS) propagation inside the empty metal enclosure show that the path loss significantly changes as a function of the transceiver’s height. It is found that this variation is due the resonant modes, contribution to the received power. Reflected-non-LoS (RNLoS) measurements show that for the same distance, the difference between the mean path loss measured inside the metal box and in a free space is limited to 1 dB, with traveling wave dominating the channel. This indicates that reflectors can be used as wave-guiding objects in metal enclosures. Finally, obstructed-LoS (OLoS) path loss measurements with the parallel dual in-line memory modules (DIMMs) as obstructions show the constructive/destructive effect on the waves due to multipath introduced by the parallel-plate structures. Compared to the free space scenarios, multipath is introduced by the traveling wave bouncing back and forth between the transceiver sides of the cavity, which introduces stronger fluctuations in observed pathloss and reduces the coherence bandwidth of the channel.

THz Channel Characterization of Chip-to-Chip Communication in Desktop Size Metal Enclosure