The object
Theodore Rappaport pioneered millimetre-wave channel measurement and propagation engineering used to design 5G radio hardware. His field trials and antenna-channel models made it feasible to use previously impractical high-frequency spectrum in manufactured cellular radios and fixed wireless infrastructure.
What Theodore did
Pioneered millimetre-wave mobile-radio measurement and propagation engineering that enabled practical 5G radio hardware design.
Why it matters
Rappaport's millimetre-wave work changed the technical consensus around 5G spectrum and became foundational to contemporary high-capacity mobile-network hardware.
Living-status check
NYU Wireless's current 2026 director profile lists Rappaport leading its research and 5G work, positive evidence he was alive in 2026.