Building the Next Generation of

In-Space Mobility

10

Maxwell Systems Delivered

6

Maxwell systems on-orbit today

20+

Systems produced by Q2 2022

PHASEFOUR

ABOUT US

Phase Four is a disruptive provider of next generation electric propulsion (EP) solutions for small satellites. Phase Four’s RF Thruster represents a revolutionary new architecture that realizes lower cost, mass-manufacturability, miniaturized power electronics, and propellant agnosticism over incumbent technologies, without compromising performance. In 2021 Phase Four’s Maxwell turn-key propulsion system achieved flight heritage and is now being regularly utilized by satellite operators.

Learn More

PRODUCTS

MaxwellHomepage

PlasmaWorks

At Phase Four we are constantly pushing the envelope of RF plasma propulsion. We have active R&D in plasma physics of RF thrusters, advanced propellants, and new applications of plasma propulsion in space.

LEARN MORE

Maxwell

Maxwell is a high performance turn-key plasma propulsion system that leverages miniaturized RF electronics and our electrodeless thruster in a compact form factor.

LEARN MORE

PlasmaWorksHomepage

RECENT NEWS

Read more about us and updates in the news.

Read More
Phase Four and Orbit Fab to work on Maxwell engine refueling

January 25, 2022

Propulsion startup Phase Four has signed a memorandum of understanding with satellite refueling startup Orbit Fab aimed at preparing future Phase Four Maxwell engines for on-orbit refueling.
Read More →
2021 by the Numbers & a Sneak Preview of 2022

January 10, 2022

2021 has been by far the most significant year in the history of Phase Four
Read More →
PhaseFour Debuts Improved Thruster

December 6, 2021

Satellite electric propulsion company Phase Four has completed testing of a new thruster that it says offers significantly improved performance
Read More →

CONTACT

We'd love to learn more from you. Please use the contact form to the right to get in touch with us, or a specific team, and we will get back to you as soon as we can!