- Business
- Filtronic plc Filtronic plc designs and manufactures high-performance radio frequency (RF), microwave, and millimeter-wave (mmWave) components and subsystems for mission-critical communications in telecommunications infrastructure, aerospace and defence, space, and critical communications sectors; core products include E-band transceivers and solid-state power amplifiers (SSPAs) such as Cerus 32 and Hercules II for high-capacity XHaul links in 5G networks and low Earth orbit (LEO) satellite constellations, custom RF sub-systems from 300MHz to 300GHz, hybrid manufacturing services, antennas, filters, power amplifiers, and transmit-receive modules (TRMs) for electronic sensor systems. Founded in 1977 and headquartered at Plexus 1, NETPark in Sedgefield, County Durham, UK, the company operates manufacturing facilities in the UK (Sedgefield, Leeds, Manchester, Cambridge) and the US (Salisbury, Maryland), serving global technology leaders, defence primes, and OEMs with design, manufacture, and test capabilities up to 175GHz. Recent developments include expanding its strategic partnership with SpaceX in March 2025 to supply increased volumes of E-band SSPA modules for the Starlink constellation, securing a record-breaking SpaceX order in August 2025, winning a £13.4m contract in July 2025 with a defence prime for high-performance modules, awarding a contract with Airbus Defence and Space for Eutelsat OneWeb LEO satellites, and completing a multi-year GaN packaging project in November 2025, alongside doubling its engineering workforce to support UK expansion.