| CPC H01P 1/06 (2013.01) [H01P 3/12 (2013.01); H04B 7/26 (2013.01)] | 15 Claims |

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1. A rotary-type data transmission device comprising:
a first structure having a first surface and a second surface facing each other, the first structure including a first metal hollow waveguide including a first through hole passing through the second surface from the first surface in a center portion thereof;
a second structure coupled to the first structure so that the second structure supports rotation of the first structure or rotation of the second structure is supported by the first structure;
a first transceiver unit facing the first surface at a certain distance therebetween, coupled to the first structure, the first transceiver unit including a first printed circuit board, a first meta waveguide, and a first transceiver; and
a second transceiver unit facing the second surface at a certain distance therebetween, coupled to the second structure, the second transceiver unit including a second printed circuit board, a second meta waveguide, and a second transceiver.
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