Filtronic has received a $68.1 million (£51.3 million) follow-on order from SpaceX for Cerus E-band gallium nitride solid-state power amplifiers, securing its largest award from the customer and adding a substantial block of production work to the County Durham manufacturer’s FY2028 order book.
The contract follows a $62.5 million SpaceX order placed in August 2025 for Filtronic’s next-generation proprietary GaN E-band technology, extending a relationship that began under a strategic agreement signed in 2024. Filtronic expects the latest order to be materially fulfilled during FY2028, giving the company production visibility beyond the period covered by many shorter-cycle electronics programmes.
Cerus amplifiers operate at millimetre-wave frequencies used in high-capacity communications links, where the amount of radio-frequency power that can be generated efficiently inside a compact assembly has a direct effect on system performance. Filtronic’s latest generation replaces gallium arsenide devices used in earlier products with gallium nitride technology, which the company says provides higher output power, improved efficiency and stronger thermal performance.
Those characteristics influence manufacturing as well as headline electrical performance because higher-power semiconductor devices reduce the amount of combining hardware needed to reach a required output, while thermal design becomes increasingly important as more RF energy is concentrated into a small module. At E-band frequencies, mechanical tolerances, waveguide geometry, semiconductor packaging, heat removal and final RF testing all have to remain tightly controlled if amplifiers are to deliver consistent results across a large production batch.
Filtronic has expanded its physical manufacturing base ahead of the latest order. A 44,000 sq ft headquarters and production facility opened at NETPark in County Durham during 2026, doubling the company’s UK manufacturing footprint and increasing cleanroom space sixfold. The site was developed to support growth across space, defence and critical communications, with Filtronic stating that the expanded operation can support annual revenue above £200 million.
The SpaceX award gives that investment a defined volume programme rather than relying solely on forecast demand. Cleanrooms, production equipment, test systems and trained technical staff carry costs whether they are fully utilised or not, so a large repeat order provides greater scope to optimise processes, secure component supply and spread manufacturing overhead across a longer run of equivalent hardware.
Filtronic is simultaneously carrying development work for other satellite customers, including an $8 million payload programme announced in September that covers the design, development and manufacture of prototype units through the first half of FY2028. The two programmes occupy different points in the industrial cycle: prototype payload work is still centred on engineering and qualification, whereas the SpaceX contract extends repeat manufacturing of an established amplifier technology.
Moving GaN hardware into sustained production places a different burden on process control from producing limited engineering quantities. Semiconductor devices, substrates, bonding, packaging, machining and assembly all contribute to yield, while RF performance has to be verified at frequencies where relatively small dimensional changes can affect losses and impedance. Higher volumes magnify the commercial cost of process drift because a modest reduction in yield can consume expensive components and test capacity across hundreds or thousands of assemblies.
Supply continuity also becomes more consequential once customer commitments extend several years ahead. GaN semiconductor availability, specialist packaging materials, precision-machined components and RF test equipment all sit upstream of final assembly, leaving Filtronic dependent on a manufacturing chain broader than the expanded NETPark site. Longer order visibility nevertheless allows purchasing and capacity planning to take place against contracted demand rather than shorter forecasts.
The concentration of significant revenue around SpaceX creates an equally demanding customer-performance requirement. Large repeat programmes reward reliable delivery and manufacturing efficiency, but delays or quality problems affect a much larger proportion of the order book when one customer accounts for substantial volumes. Filtronic’s recent investment therefore has to provide more than additional floor space, with delivery performance depending on process stability, supplier management and the availability of specialist engineering staff as output rises.
The company’s position in the satellite market has developed from high-frequency component expertise into increasingly large production programmes, while its UK operation retains design, manufacturing and test capability around the same technology base. That combination gives Filtronic more control over the transition from RF design into repeat hardware, although the scale of the SpaceX orders is now pushing the business into a different manufacturing category from low-volume specialist electronics.
Material fulfilment during FY2028 will provide the next measure of that transition. The new factory, expanded cleanroom capacity and GaN production processes are already in place; the £51.3 million order now requires them to deliver repeatable E-band hardware at the volume, yield and schedule expected by Filtronic’s largest customer programme.
