The IEEE 299 standard, entitled “IEEE Standard Method for Measuring the Effectiveness of Electromagnetic Shielding Enclosures,” defines standardized procedures for measuring the electromagnetic shielding attenuation of large enclosures and shielded rooms. The aim is to evaluate the ability of a shielding structure to block or attenuate electromagnetic fields—known as shielding effectiveness (SE). The standard covers a wide frequency range from 9 kHz to 18 GHz and describes various measurement methods, including transmission measurement through the enclosure under defined conditions.

Different antenna and probe configurations are used to analyze both electric and magnetic fields. The test objects can vary greatly in size – from shielded server rooms to containers. The standard is particularly applicable in security-critical areas such as the military, government agencies, aerospace, and the protection of critical infrastructure. In these areas, compliance with defined shielding attenuation values is essential, for example, to ward off eavesdropping attacks, protect against electromagnetic interference, or comply with TEMPEST requirements.

cetecom advanced offers testing in accordance with IEEE 299 / MIL-STD-285 and specializes in on-site measurements to support customers directly at their locations – for example, during the commissioning of new protective rooms or for recurring testing of existing EMC shielding measures. In this way, we make an important contribution to quality assurance in sensitive applications and support our customers in meeting industry-specific standards and military requirements.

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