SIEPEL

France

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SIEPEL (Société Industrielle d'Études et Protections Électroniques) is a specialized French manufacturer and testing service provider in electromagnetic shielding, microwave absorbers, and anechoic chambers. Founded in 1986 and based in La Trinité-sur-Mer, Brittany, SIEPEL operates from a 7,000 m² integrated production and engineering facility and functions as part of Cegelec Défense within the VINCI Energies group.SIEPEL designs, fabricates, and installs turn-key electromagnetic containment infrastructure for EMC testing, antenna characterization, radar cross section (RCS), and physical cybersecurity. Its solutions serve defense ministries, space agencies, aerospace contractors, automotive OEMs, and telecom equipment makers across the globe.In addition to hardware manufacturing, SIEPEL operates a COFRAC-accredited test laboratory under ISO/IEC 17025 for in-situ shielding effectiveness measurements and anechoic chamber field uniformity qualification, verifying compliance with EN 50147-1, IEEE 299, and MIL-STD-285.

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SIEPEL manufactures high-performance electromagnetic shielding infrastructure and provides accredited verification measurements:<ul><li>EMC Anechoic Chambers: Pre-compliance and full-compliance semi-anechoic (SAC) and fully anechoic (FAR) chambers designed for commercial (CISPR / EN), automotive (CISPR 25), and military (MIL-STD-461) test geometries.</li><li>Mode-Stirred Reverberation Chambers (MSRC): Reverberation chambers enabling high electric field generation (up to thousands of V/m) for automotive and aeronautic HIRF immunity evaluations with reduced amplifier power.</li><li>Electromagnetic & Microwave Absorbers: Polyurethane pyramidal absorbers, flat absorbers, ferrite tiles, and hybrid pyramidal/ferrite absorbers engineered for wideband attenuation up to 40+ GHz with fire-retardant certifications (ISO 11952-2, DIN 4102-B2, NRL 8093).</li><li>Faraday Cages & Shielding Elements: Modular pan-type shielded rooms offering over 100 dB shielding effectiveness from 10 kHz to 40 GHz; high-performance knife-edge shielded doors (swing and sliding doors up to large launcher dimensions), waveguide vents, honeycombs, and RF filters.</li><li>Accredited Shielding Testing: ISO/IEC 17025 accredited on-site measurements of shielding attenuation and anechoic chamber site VSWR and field uniformity.</li></ul>

SIEPEL

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