Procurement & Supply Chain
ITAR-Free RF Power Processing Units: A European Supply Chain
For a European propulsion manufacturer, the export-control status of the power processing unit shapes who it can sell a thruster to and how fast it can buy parts. This is where export control actually bites in an RF power chain, and what a European supply chain changes.
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What "ITAR-free" means, and what it does not mean
The International Traffic in Arms Regulations (ITAR) is a United States regime that controls the export and re-export of defence articles on the United States Munitions List. A component described as "ITAR-free" contains no ITAR-controlled content, so integrating it does not pull the finished system under ITAR jurisdiction.
The label is often used loosely. A part can be free of ITAR but still fall under the United States Export Administration Regulations (EAR), or under European Union dual-use controls, or under national rules in the country of manufacture. "ITAR-free" is best read as "no United States State Department licence is needed to move this", not as "no export control applies". The useful question for a propulsion team is narrower: can I buy this part, and can I sell my thruster to my target customer, without a United States re-export licence in the loop?
A single ITAR-controlled part inside a PPU can place the entire propulsion system, and often the satellite it flies on, under United States re-export control.
Why it matters to a propulsion OEM
MHz Labs sells to propulsion manufacturers, and those manufacturers sell thrusters to satellite integrators worldwide. Three things go wrong when the PPU carries United States control:
- Restricted customer base. Sales to some countries and some end users need a United States licence, or are barred outright, regardless of the thruster maker's own nationality.
- Procurement delay. Technical Assistance Agreements and export licences add months to a schedule and paperwork to every shipment and design review.
- Programme eligibility. European Space Agency and European Union defence programmes increasingly ask for non-dependence on non-European critical components. A United States-controlled PPU can weaken a proposal.
Where export control bites in an RF PPU
The controlled content in an RF power processing unit is concentrated in a few places:
| Sub-assembly | Typical control exposure |
|---|---|
| RF power transistors (GaN or LDMOS) | Often EAR-controlled; some space or high-reliability grades are ITAR or heavily licence-managed |
| Radiation-tolerant controllers and FPGAs | EAR, sometimes ITAR for space-qualified grades |
| RF connectors, circulators, isolators | Usually EAR99 or light control, but space grades vary |
| DC-DC converter modules | Commercial grades usually uncontrolled; space grades can be EAR-listed |
| Design data and test results | Technical data can itself be controlled, independent of the hardware |
The RF power stage is the sensitive item. Sourcing the transistors and the control electronics from European suppliers removes most of the exposure. The RF generator is where those parts sit.
ITAR, EAR and the EU dual-use list
Three regimes commonly touch a PPU:
- ITAR (United States, State Department): munitions-list defence articles and services.
- EAR (United States, Commerce Department): dual-use and less-sensitive military items, including many RF semiconductors.
- EU Regulation 2021/821: the European Union dual-use list, which mirrors much of the Wassenaar Arrangement.
A European-built PPU using European and allied non-United States parts is subject to EU dual-use rules and the manufacturer's national controls, but keeps United States re-export licensing out of the customer's path. That is the practical meaning of "ITAR-free" for this product.
European GaN and RF sovereignty
The European Space Agency and European Union defence instruments such as the European Defence Fund are actively funding a European gallium nitride RF supply chain, from foundry capacity to space qualification. A propulsion programme that specifies a European GaN-based PPU is aligned with that direction of travel, which helps in incubation and grant contexts including ESA Business Incubation Centres.
What a European-supply-chain RF PPU looks like
- RF power transistors from a European or allied non-United States foundry.
- Controller and logic devices with a European or European-licensable source.
- Magnetics, passives and connectors sourced within Europe where space grades allow.
- Design data held under the manufacturer's national jurisdiction only.
- A documented bill of materials with a control classification per line, so the customer can file a clean self-classification.
The MHz Labs approach
MHz Labs is designing its RF power processing unit and adaptive impedance matching network on a fully European supply chain, with GaN power stages and a bill of materials classified line by line. The goal is that a propulsion manufacturer can integrate the unit and sell its thruster without a United States re-export licence in the path. MHz Labs is an independent RF power electronics company and an ESA BIC applicant, developing the unit along a TRL 4 to 6 roadmap.
Frequently asked questions
Is any space hardware truly 100 percent export-control-free?
No. Every space electronic assembly falls under some regime, whether United States EAR, EU dual-use, or national law. The achievable goal is to keep United States State Department (ITAR) licensing out of the supply and sales path, and to document the remaining classifications clearly.
Does using a European PPU remove all paperwork?
It removes the United States re-export layer for the propulsion customer. EU dual-use self-classification and the manufacturer's national export rules still apply, but those are far lighter than an ITAR chain.
Why is the RF power stage the sensitive part?
High-performance RF power transistors, especially space or high-reliability grades, are the components most likely to carry United States control. Sourcing them in Europe removes most of the exposure in a PPU.
Does ITAR-free positioning help with ESA funding?
European Space Agency and European Union programmes increasingly value non-dependence on non-European critical components, so a European-supply-chain PPU can strengthen a proposal. It is one factor among many, not a guarantee.
Sources and further reading
- Regulation (EU) 2021/821, the European Union dual-use export control regime, EUR-Lex.
- The Wassenaar Arrangement on export controls for conventional arms and dual-use goods and technologies.
- International Traffic in Arms Regulations (ITAR), 22 CFR Subchapter M, United States eCFR.
Need an ITAR-free RF PPU for your thruster?
MHz Labs designs its RF power processing unit on a European supply chain so your propulsion product stays free of United States re-export licensing. Talk to the engineering team in Seville.
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