Filtronic plc

Filtronic plc is a UK-based designer and manufacturer of high-performance radio frequency (RF), microwave, and millimeter-wave (mmWave) subsystems for space, defence, and terrestrial telecommunications. Headquartered in Sedgefield, County Durham, the company provides critical technologies for low Earth orbit satellite communications payloads, phased array antennas, and high-throughput feeder links. Its comprehensive product portfolio includes solid-state power amplifiers, transceivers, frequency converters, custom RF filters, and software-defined radios. In the defence sector, Filtronic delivers advanced active electronically scanned array radar components, electronic warfare jammers, decoys, and tactical communications equipment. The business serves global original equipment manufacturers and telecommunications operators across Europe, North America, and Asia. In addition to hardware manufacturing, Filtronic offers full lifecycle services including custom engineering, high-volume automated assembly, product assurance testing, and contract manufacturing. Operating facilities in Sedgefield, Leeds, Cambridge, and Maryland, the company supports next-generation 5G networks, satellite communications, and quantum computing infrastructure.