Stellant Systems

Stellant produces radio-frequency (RF) and microwave power-amplification products including traveling-wave tubes and amplifiers (TWTs/TWTAs) for satellites and electronic warfare, solid-state power amplifiers (SSPAs) in gallium-nitride technology, crossed-field amplifiers, klystrons, magnetrons, thyratrons, inductive output tubes (IOTs), and the Xenon Ion Propulsion System (XIPS) electric thruster. The firm also provides RF assembly and ETL testing services. The product catalog is split between vacuum-electron devices and solid-state components, covering frequencies from UHF to millimeter-wave.

Stellant serves space, defense — including directed-energy programs — medical and scientific, and industrial markets. Space applications include satellite communications and electric propulsion. Defense applications span radar, electronic warfare, and directed-energy weapons. Medical and scientific uses include linear accelerators (LINACs) for cancer therapy and research. Industrial applications include microwave heating and materials processing. The firm characterizes its customer base as both domestic and international.

Stellant operates five domestic manufacturing facilities in Torrance, California; Williamsport, Pennsylvania; Melville, New York; and Topsfield, Massachusetts. All five facilities are certified to ISO 9001:2015 and AS9100:2016, the quality management standard for the aerospace and defense industry. The facilities also maintain DCMA (Defense Contract Management Agency) approval, enabling direct performance on classified and unclassified Department of Defense contracts.

Stellant Systems is a privately held company. It does not disclose financial metrics or ownership structure. The firm operates as a portfolio company, having expanded via the recent acquisition of the Power Systems Technology division from Comtech Telecommunications. No public filings detail the sponsor or backer behind the Stellant entity.

XIPS is an electric propulsion thruster manufactured by Stellant that uses xenon ions to generate low-thrust, high-efficiency propulsion for satellites. It enables station-keeping, orbit-raising, and deep-space maneuvers with significantly less propellant mass than chemical thrusters. XIPS has been flown on commercial communications satellites built by primes such as Space Systems/Loral (now Maxar Space Systems) and contributes to the firm's position as a supplier of flight-qualified space hardware.

Stellant acquired the Power Systems Technology division of Comtech Telecommunications, which included solid-state power amplifier (SSPA) and control-component operations in Melville, New York, and Topsfield, Massachusetts. The deal brought complementary gallium-nitride SSPA capability and increased Stellant's solid-state RF footprint alongside its existing vacuum-electron device manufacturing base. The acquisition is disclosed on Stellant's own website, though the financial terms were not made public.

No. While defense and space — including classified US government programs — form a significant part of the business, Stellant sells to commercial satellite operators both domestically and internationally. The firm also serves medical equipment manufacturers, scientific research institutions, and industrial OEMs. International sales are confirmed through the firm's own description of serving both domestic and international customers.