RF and wireless is the engineering layer where 6G ambitions meet physics: a June 2026 snapshot of the research front shows credible hardware progress in filters, phase shifters and linearisation alongside system-level concepts (reconfigurable surfaces, integrated sensing, sub-THz links) that are still mostly testbed and simulation work.
Summary
“RF and wireless” here covers the radio-frequency signal chain and the propagation environment it works in: the analogue components that generate, filter, steer and linearise GHz-to-sub-THz signals; the antenna and metasurface structures that shape the channel; the channel models and estimation algorithms that make the link usable; and the growing use of the same radio hardware for sensing rather than just data transport. The current research front, judged from arXiv output on 15-16 June 2026, splits into three fairly distinct layers with different maturity.
Evidence base
Open questions
Assessment drafted 2026-08-31 from up to 18 KB sources using the technology-scorecard framework; scores are a draft read pending review.
Recent mentions
2026-10-28Sennheiser To Help Launch DECT Forum Audio Interest Group At DECT World 2026 - 4RFVweb
2026-10-28Sennheiser Advances DECT NR+ Audio Ecosystem Ahead of DECT World 2026 - audioXpressweb
2026-10-19Foxconn pays $727M for half of Mitsubishi Electric’s car parts unit in EV pushweb
2026-10-15WRC-27 agenda item 1.7: IMT in 4.4-4.8 GHz, 7.125-8.4 GHz and 14.8-15.35 GHz (status, Oct 2026)web
2026-10-15DAS and in-building wireless market size: analyst consensus (compiled)web
2026-10-15DAS cost structure: installation vs equipment, remote-unit prices, optics share of radio-unit cost (compiled)web
2026-10-14Mayhem 10 drones get upgraded to connect satellite, cellular and radio simultaneouslyweb
Frontier questions
Does the reciprocity result for a finite RIS with one particular unit-cell design generalise to commercial panel sizes and heterogeneous unit cells, or does it need re-establishing per design 2026 06 15 implications of the reciprocity theorem for reconfigurable i?
Can pilot overhead for extremely large passive arrays and SIM layers be reduced enough that near-field beamfocusing is affordable with realistic RF chain counts 2026 06 15 dual transformer aided hierarchical deep reinforcement learn 2026 06 16 sparse channel estimation for sim based mmwave near field co?
Does sub-THz presence detection survive the empty-room drift observed under small environmental changes, and what false-alarm rate does that imply in an unattended deployment 2026 06 16 on the feasibility of human presence detection using ceiling?
Do magnonic phase shifters retain their footprint and tuning advantages once insertion loss, MEMS reliability and array-scale integration are accounted for 2026 06 15 microscaled tunable magnonic rf phase shifters?