Researchers Propose 'Leaky' Chip Tech for 6G Terahertz Speeds
IEEE Spectrum has highlighted research into "leaky" 6G chip technology using topological antennas to achieve unprecedented 3D signal coverage. This approach aims to overcome the beam constraints typically found in terahertz frequencies. The technology could be a key enabler for achieving the terabit-per-second speeds envisioned for future 6G networks.
- The underlying science for this "leaky" chip is based on photonic topological insulators, a class of materials that allows electromagnetic waves to travel along their surface or edge with minimal scattering or reflection, even around sharp corners. - This specific research was led by a team at the University of Notre Dame, which developed a silicon chip with two different-sized holes to control the leakage of terahertz waves, effectively turning the chip into a versatile antenna. - The primary technical challenges at terahertz (0.1-10 THz) frequencies that this technology aims to solve are severe signal power loss over distance (path loss), absorption by atmospheric gases, and the need for line-of-sight propagation. - Standardization for 6G is being led by 3GPP, which began requirement-related work in 2024 under Release 19; the first 6G specifications are planned for Release 21, expected to be complete by the end of 2028. - An earlier foundational standard in this frequency range is IEEE 802.15.3d, approved in 2017, which defined a physical layer for 100 Gbps communication in the 300 GHz band. - This topological antenna approach is one of several enabling technologies being explored for 6G; other prominent solutions include Reconfigurable Intelligent Surfaces (RIS) and advanced metamaterials to help steer and enhance THz signals. - The International Telecommunication Union (ITU) will begin evaluating submitted 6G technologies in 2027 for its IMT-2030 framework, with a final decision on the standards expected to align with the target for initial commercial 6G deployments around 2030. - Key global players like the US Defense Advanced Research Projects Agency (DARPA) and Japanese operator NTT DoCoMo have also been actively researching and developing terahertz-band technologies for future network applications.
