Startup California Last reviewed March 2026

Phase Four

Develops electric propulsion systems for small satellites and spacecraft.

Overview

Phase Four develops next-generation radio-frequency (RF) thruster technology for small satellite electric propulsion. The company's Maxwell engine uses plasma generated by radio waves rather than traditional ionization grids, resulting in a simpler, more compact, and cost-effective propulsion system. Their technology enables small satellites to perform orbit raising, station-keeping, and deorbit maneuvers that were previously impractical for spacecraft of their size.

AI Outlook

Exploring

Phase Four applies plasma physics simulation to RF thruster development.

Student Hiring

Internship Program Entry-Level Friendly