Presentation Information
[BCS-1-02]Photonic-assisted Sub-THz Multi-beam Transmissions by Optical Butler Matrix Beamformer
〇Honoka Ito1, Ken Hiraga1, Hirofumi Sasaki1, Jun Mashino1 (1. NTT)
Keywords:
6G,THz,array antenna,beamforming,photomixing
In high-frequency wireless communications, it is important to ensure sufficient system margin against increased propagation loss and signal bandwidth, as well as to achieve high capacity through multiplexing. For this purpose, ultra-massive MIMO systems, which generate a large number of narrow beams using array antennas with thousands to tens of thousands of elements, have attracted significant attention. As an example configuration for single-beam control in such ultra-large-scale arrays, a beamformer has been proposed in which the phases of the feeding signals for the row and column elements of a two-dimensional array antenna are individually controlled using phase shifters, followed by optical-to-electrical conversion using photomixers. We have extended this photomixer-based beamformer and proposed a photonics-assisted matrix radio beamformer that enables multi-beam control using Butler matrix circuits implemented with a PLC, and have previously reported single-beam generation.
In this paper, we experimentally demonstrate two-beam wireless transmission in the 150 GHz band using a testbed of the photonics-assisted matrix radio beamformer.
In this paper, we experimentally demonstrate two-beam wireless transmission in the 150 GHz band using a testbed of the photonics-assisted matrix radio beamformer.