Fig. 1: mmWave backscatter architecture. | Nature Electronics

Fig. 1: mmWave backscatter architecture.

From: A printed millimetre-wave modulator and antenna array for backscatter communications at gigabit data rates

Fig. 1

a, A mmWave backscatter system with gigabit-per-second data rate, with a 24–28 GHz transceiver and single-transistor backscatter communicator. The single-transistor communicator acts as a wireless mixer that is illuminated with an unmodulated continuous-wave signal by the transceiver and mixes high-speed data by controlling the transistor’s impedance. The transceiver receives the modulated backscattered signals and demodulates them for digital baseband processing. b, Heterodyne modulation and demodulation of gigabit-per-second-data-rate mmWave backscatter. Grey lobes correspond to spectra of complex-valued signals.

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