OAM Multiplexing

Technical Explanation

Orbital Angular Momentum (OAM) exploits the spatial phase degrees of freedom of electromagnetic waves. By shaping the wavefront of radio waves into helical spirals with distinct topological charges (modes l = 0, ±1, ±2, ...), different OAM modes remain mutually orthogonal along their propagation axis. In 6G line-of-sight backhaul and point-to-point data center links, OAM modes multiplex parallel data channels over a single frequency without requiring widely separated multi-antenna baselines.

Key Functions

• Spatial multiplexing using orthogonal helical phase twist modes (topological charges)
• Multiplying point-to-point wireless transmission capacity without extra spectrum
• Inherent physical layer security as off-axis receivers detect only phase cancellation
• High-capacity wireless backhaul linking 6G towers to optical transport trunks
• Generation via circular antenna arrays, spiral phase plates, or metasurface holograms