Fig. 3: Selected measurements of the single-channel mode. | Nature Communications

Fig. 3: Selected measurements of the single-channel mode.

From: Two-dimensional and high-order directional information modulations for secure communications based on programmable metasurface

Fig. 3: Selected measurements of the single-channel mode.The alternative text for this image may have been generated using AI.

a–c Experimental setup to verify the proposed DIM scheme. a The experiment configuration. b The measurement scene. c The photos of the fabricated PM. d–g The measured results of the single-channel DIM. d The phases and e magnitudes of the signals along \((\theta,\varphi )=(-19^{\circ},\, 0^{\circ} \, )\) for the 8PSK modulation. f The phases and g magnitudes of the signals along \((\theta,\varphi )=(21.5^{\circ},\, 0^{\circ} \, )\) for the 64QAM modulation.

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