AST SpaceMobile Podcast The NotebookLM Brief: Two Satellites, Two Destinies
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Mar 8, 2026 A lively breakdown of space-based cellular broadband and why phones fail outside terrestrial towers. A deep dive into direct-to-device service and the engineering behind huge deployable satellite antennas. Discussion of phased-array tile architecture, spectrum partnerships, and the tradeoffs between bent-pipe and regenerative payloads. Reflections on commercial strategies and societal impacts of global connectivity.
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Thousands Of Tiles Create Laserlike Beams
- AST divides its 2,400 ft² surface into thousands of independent tiles, each acting like a mini cell tower to synthesize extremely high-gain phased beams.
- Thousands of elements let AST form tight constructive beams and destructive nulls to avoid interference.
Beamforming Lets High Power Be Safe
- Massive phased arrays can create constructive interference toward a target and destructive interference elsewhere, letting AST meet OOBE/regulatory limits despite high power.
- The report compares this to noise-cancelling: focus the beam and null the spill to protect terrestrial networks.
Rakuten Demo Showed Seamless Video Call From Space
- AST proved seamless user experience with Rakuten in Japan by completing a two-way mobile broadband video call from an unmodified smartphone directly to the satellite.
- This demonstration showed low latency, no apps, and carrier-level handover transparency.