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Starlink V3 aims for 1 Tbit/s per satellite
SpaceX says Starlink V3 will deliver up to 1 Tbit/s downlink per satellite and power LTE-class phone links without special hardware.
Image: ITzine
SpaceX has outlined a major upgrade for Starlink: the new V3 satellites are designed to deliver up to 1 Tbit/s of downlink capacity per spacecraft, roughly a 10x increase over Starlink V2, according to the company. Uplink capacity from users is set to rise even more sharply, to 160 Gbit/s.
SpaceX says the gains come from new phased-array antennas, plus in-house chips and modems that can handle about 64 times more traffic per chip. The number of communication beams is also jumping dramatically. Starlink V3 will support 2048 beams for transmitting and receiving data, versus 192 and 144 on Starlink V2. That should give the network more flexibility in allocating capacity, especially in congested areas where satellite broadband tends to slow down first.
Key Starlink V3 specs disclosed by SpaceX include:
- Downlink capacity: up to 1 Tbit/s
- User uplink: up to 160 Gbit/s
- Communication beams: 2048
- Inter-satellite laser links: 6 at 400 Gbit/s each
- Ground station link: up to 1.2 Tbit/s
- Solar power: about 2x more
Each satellite will carry six laser links rated at 400 Gbit/s apiece, a change aimed at reducing reliance on ground stations and improving traffic routing over oceans, polar regions, and areas with weak infrastructure. SpaceX also says the satellites will use four multi-band radio-frequency antennas, while throughput to ground stations will increase by more than 8x to 1.2 Tbit/s.
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Starship and direct-to-cell plans
SpaceX is tying Starlink V3 closely to Starship. The company says a single Starship launch carrying V3 satellites would add about 20 times more total network capacity than a Falcon 9 launch with Starlink V2 spacecraft. That matters because V3 is significantly larger and more power-hungry, making heavy-lift deployment central to scaling the constellation.
The upgrade is also meant to push Starlink beyond home internet. SpaceX says Starlink V3 technology will underpin Starlink Mobile Gen 2, with promised LTE-level speeds for ordinary smartphones without any handset modifications. The company has already been testing direct-to-cell service.
Competition is already taking shape. AST SpaceMobile is building a satellite cellular network around large deployable antennas, while Apple and Globalstar have focused on emergency satellite connectivity for the iPhone.
By 2025, Starlink was serving millions of subscribers worldwide, and the network had become the largest satellite constellation in orbit. The next constraint may be less about the spec sheet than about Starship’s launch cadence.
Frontier Editor
Dan is our resident futurist, covering electric mobility, space exploration, and the smart home. He's interested in atoms just as much as bits. Whether it's a new battery chemistry, a reusable rocket, or a protocol that finally makes IoT devices talk to each other, Dan breaks down the engineering that pushes humanity forward.
via ITzine
