Van Osta, MichielMichielVan OstaBroucke, ReinierReinierBrouckeVan Kerrebrouck, JorisJorisVan KerrebrouckDemeester, PietPietDemeesterSingh, NishantNishantSinghTorfs, GuyGuyTorfs2026-07-162026-07-162025979-8-3315-9726-92835-3501https://imec-publications.be/handle/20.500.12860/59888A grid of optical fibers that utilize analog radio-over-fiber and optical frequency upconversion at the remote radio unit is proposed, to solve the problem of feeding a large distributed antenna array such as large intelligent surfaces with phase coherent mmWave signals in an efficient manner. The 2D-PON grid consists of column fibers which carry LO signals while row fibers carry the modulated IF signals multiplexed over a single fiber. At each intersection, optical power is tapped off and fed into a photodiode where a mmWave RF signal is generated by photonic frequency upconversion of the IF signal using the LO signal. As a proof-of-concept, a 1x2 grid of fibers feeding wavelength division multiplexed data signals and a selector wavelength is demonstrated at 60 GHz with 1 GBaud 16-QAM.engProceedings paper10.1109/mwp65272.2025.11371793WOS:001789391900011