CesiumAstro

CesiumAstro Inc. is a vertically integrated space and defense communications company that designs, manufactures, and delivers advanced phased-array RF and optical communication systems. The company's mission is to industrialize space and defense communications by producing mission-ready, software-defined connectivity systems at scale.

CesiumAstro's product portfolio spans the full communications chain for satellite constellations: software-defined crosslinks that route data between spacecraft in real time, high-throughput downlink systems for delivering mission data from orbit to ground, forward links and relay systems extending communications beyond Earth orbit, and adaptive multi-beam phased-array antennas that deliver high-capacity connectivity where needed. The company also develops 5G Non-Terrestrial Network (NTN) connectivity systems bridging terrestrial, airborne, and space domains.

With vertically integrated manufacturing capabilities, CesiumAstro produces RF front-ends, phased-array antenna panels, and complete communication payloads in-house, enabling rapid iteration and high-rate production for proliferated satellite constellations. The company serves both commercial constellation operators and defense customers requiring resilient, high-throughput satellite communications.

CesiumAstro's technology is designed to be modem-agnostic and multi-orbit capable, supporting missions across LEO, MEO, and GEO with consistent hardware platforms that reduce integration risk and accelerate deployment timelines for next-generation space communications infrastructure.