The number that decides whether a communications satellite works is not its power or its bandwidth — it is its pointing accuracy, and it is measured in fractions of a degree. From geostationary orbit, 36,000 km up, an aiming error of a tenth of a degree walks the beam roughly 60 km across the ground. For a spot beam meant to serve a specific city, that is the difference between coverage and a missed market.
Space Systems/Loral's grant US10367575B1, "High pointing accuracy spacecraft" (issued 2019), is a compact tour of how this is solved. Its CPC tags pair the antenna art with the comms art: H01Q 3/08, H01Q 21/00, and H01Q 25/02 (phased arrays and multi-beam antennas), H01Q 15/161 and H01Q 19/18 (reflectors), alongside H04B 7/0617 (beamforming) and H04B 7/18515 (satellite links). That combination is the whole mechanism in a tag list.
Here is how it actually works. A phased-array antenna is not a dish that physically swivels; it is a grid of many small radiating elements. By adjusting the relative timing — the phase — of the signal fed to each element, the array steers its beam electronically, with no moving parts. Beamforming is the technique of shaping and aiming that combined beam. The "pointing accuracy" problem is then twofold: the spacecraft must know its own orientation precisely (attitude determination), and the array must convert that knowledge into the exact phase settings that put the beam where it belongs.
The antenna is the architecture, to put it plainly. A satellite's value proposition — how many beams, aimed how precisely, reconfigurable how fast — is largely set by its antenna and the control that aims it. Electronic steering via phased arrays is what lets a modern satellite hop a beam between coverage zones in milliseconds, the capability behind both high-throughput GEO satellites and the steerable LEO constellations now flying.
Space Systems/Loral (now folded into Maxar) was for decades one of the dominant commercial GEO bus builders, and a grant like this reflects that heritage: the hard-won, incremental engineering of making a beam land where you promised. It is not a flashy claim. It is the kind of IP that determines whether the flashy claims — gigabits to a moving aircraft, direct-to-cell from orbit — actually close.
For readers following the constellation lane, pointing accuracy is the spec to interrogate behind any direct-to-cell or high-throughput announcement. The patent does not give you a fielded number, but it tells you the levers — phased-array steering, beamforming, attitude knowledge — that any operator must pull. When the geometry and the spectrum line up, a beam hits its target; the patents are where the engineering to make that repeatable gets claimed.