SiPhotonics/GaAs 28-GHz Transceiver for mmWave-Over-Fiber Laser-Less Active Antenna Units

We demonstrate a 28 GHz radio-over-fiber system with laser-less, low-cost active antenna units using silicon photonics and a GaAs driver and LNA. 7-Gb/s downlink and uplink throughput was achieved over 2km SSMF and 5m wireless.