Fig. 5: Experimental results of ultrawideband beamforming by the two-dimensional quasi-TTD beamformer. | Nature Communications

Fig. 5: Experimental results of ultrawideband beamforming by the two-dimensional quasi-TTD beamformer.

From: Frequency-comb-steered ultrawideband quasi-true-time-delay beamformer for integrated sensing and communication

Fig. 5

a Measured far-field radiation patterns at 12, 15, and 18 GHz when the beam is steered to (13°,16°), (0°,0°), and (9°, −18°), respectively. The consistent main lobe direction confirms the squint-free beamforming capability of the proposed 2D quasi-TTD architecture. b The received LFM waveform at the beam direction of (13°,16°). c Coordinate-frequency contour plots for the (13°,16°) beam, representing its projection onto the receiving plane. The location of the beam maxima along both the x and y axes remain nearly consistent throughout 12–18 GHz.

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