Radio Beamsteering for a 2×5 Remote Radio Head Assisted by a Shared Wideband Etalon Cascade

Abstract

We demonstrate RF beamsteering through cascaded Gires-Tournois etalons, yielding a delay-tailored DWDM feed for a 2×5 antenna configuration. 64-QAM OFDM radio is transmitted under 32° beam deflection. We further show kHz carrier phase switching. © 2022 The Author(s)

Photonic Delay Processing With Centralized Etalon Cascade for Radio Beamsteering in Simplified 2 × 5 Phased-Array Radio Heads

“…However, the tuning mechanism can become complex and bandwidth limitations might arise. An option to reduce the complexity in tuning is provided through Gires-Tournois or Fabry-Pérot type etalons [20][21][22][23]. In this work, we extend our initial findings on shared delay dissemination through a Gires-Tournois etalon [23], by incorporating a second C-band wavelength set that is processed through the centralized etalon for the purpose of real-time radio signal transmission involving a high-definition video feed.…”