Figure 11.

New architecture wireless communication systems via TDC digital metasurfaces. (a) Schematic of the metasurface-based transmitter of the BFSK wireless communication system and the corresponding measured results. Reproduced from [109]. (b) Photo of the wireless communication system and the measured constellation diagrams. Reproduced from [95]. (c) The block diagram of the communication transmitter constructed by a TDC digital metasurface and the constellation diagram of QPSK, 8PSK, and 16QAM. Reproduced from [96]. (d) The fabricated microwave prototype of the TDC digital metasurface working around the frequency of 4.25 GHz. Reproduced from [96].