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.

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PRODUCTS

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.

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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.

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RECENT NEWS

Read more about us and updates in the news.

A Maxwell Block 2 engine undergoing environmental testing at Phase Four

Jim Bridenstine, Former NASA Administrator, joins Phase Four’s Board of Directors

September 2, 2022

Bridenstine brings a wealth of industry experience and a commitment to space sustainability

Former NASA administrator joins board of spacecraft propulsion startup Phase Four

September 1, 2022

Former NASA Administrator Jim Bridenstine joined the board of directors of spacecraft propulsion startup Phase Four, the company told CNBC.

Phase Four's RF Thruster operating on a nitrogen-oxygen blend

Phase Four and Impulse Space to Collaborate on Multi-Mode Propulsion

June 8, 2022

Phase Four, the creator of the radio-frequency thruster (RF Thruster) for satellite propulsion, announced today that it has signed a memorandum of understanding with Impulse Space, a Space 2.0 pioneer providing agile, economical last-mile space payload delivery capabilities.

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!