Design of a THz Multi-Beamforming Network Based on FOWLP for High-Speed Chip-to-Chip Wireless Communications

This paper proposes a multi-beamforming network (MBFN) operating at a terahertz (THz) frequency of 220 GHz. The network comprises seven feeding substrate integrated waveguide (SIW) ports, a parallel plate waveguide (PPW), and a phase shifter array consisting of 17 parallel SIWs. Simulation results indicate that feeding different ports can generate four distinct phase distributions sequentially. Preliminary testing was conducted on a GSG probe station, and there was good agreement between the test and simulation. Based on the fan-out wafer-level package (FOWLP), this network is potentially suited for integrating with array antennas, enabling beamforming reconfiguration and fast multi-target switching for chip-to-chip THz wireless communication.