First integrated photonic mm-wave radar chip resolves frequency/ bandwidth trade-off, for 6G Integrated Sensing and Communication networks

https://techxplore.com/news/2025-11-photonic-millimeter-radar-chip-generation.html

"struggle maintaining high bandwidth at high frequencies, overcome using optical rather than electrical signal processing... thin-film lithium niobate photonic platform shrunk to sub-coin-size while achieving highest resolution of any on-chip photonic radar... mm-wave V band (centered at 45 GHz) with 10 GHz bandwidth... precision velocity detection/ ranging, integrations signal generation/ echo processing, no high-speed digital-to-analog/ analog-to-digital converters... scalable production on 4-inch wafers"