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Simulated and measured far-field radiation patterns of the Luneburg lens-antenna at 6 GHz. (a) Ports 1, 2, and 4 excited simultaneously. (b) Ports 1, 3, and 5 excited simultaneously. (c) Ports 1, 2, 3, 4, and 5 excited simultaneously. (d) Ports 1, 6, 7, 8, and 9 excited simultaneously.
