EMC SHIELDING IN THE SECURITY SECTOR

Protecting critical infrastructure

In the military and security sector, electromagnetic compatibility (EMC) directly determines the operational readiness of technical systems. Without effective shielding measures, failures, data leaks or targeted electromagnetic attacks become real threats. Shielding mesh ensures the protection of critical infrastructure by maintaining the functionality of essential IT and communication systems, and by safeguarding radar and navigation technology as well as vehicles and aircraft from electromagnetic risks.

Special requirements in the security sector

Military and security‑relevant facilities use highly complex electronic systems: communication equipment, radar systems, IT infrastructure and weapons technologies. These systems must function reliably – even in environments with high electromagnetic stress or deliberate interference.

Reasons for EMC shielding in the security sector

Numerous factors make EMC shielding measures an integral part of protecting critical infrastructures:

Systems must work reliably even under heavy electromagnetic loads – such as intense radio traffic, radar emissions or electronic countermeasures. EMC shielding prevents failures and malfunctions.

Electromagnetic pulses (EMP) and Electronic Counter Measures (ECM) can be used deliberately to disrupt or destroy systems. Shielding increases the resilience of critical infrastructure.

Electronic devices may unintentionally emit electromagnetic signals that can be intercepted and analyzed remotely (e.g., TEMPEST attacks – Transient Electromagnetic Pulse Emanation Standard). EMC shielding prevents unauthorized data extraction and protects against espionage.

In multinational missions, systems from different armed forces must operate together without interference. EMC‑compliant design and shielding are essential for interoperability.

Equipment and facilities must adhere to strict EMC requirements, such as MIL‑STD‑461 or NATO guidelines. Shielding measures are necessary to meet these standards.

Use of shielding mesh in the security sector

Shielding mesh acts as a finely woven metallic mesh that reflects or absorbs electromagnetic waves, preventing penetration. It offers a flexible, cost‑efficient and mechanically robust solution for various security‑sector applications, for example:

Wall and room shielding: Mesh can be integrated into walls, ceilings and floors to shield rooms against electromagnetic fields – common in command centers, meeting rooms or data centers.
Faraday cages: Metal mesh serves as the basis for mobile or stationary Faraday cages that allow full electromagnetic isolation.
Technical housings and control cabinets: Mesh is installed inside housings to shield individual devices or components – often in combination with conductive gaskets and EMC filters.

However, the overall shielding effectiveness does not depend on the material alone: seams, joints and ventilation openings are critical points where electromagnetic waves can penetrate or escape. Proper overlap of mesh layers, conductive gaskets and EMC‑rated sealing solutions are essential to close these gaps effectively. Additionally, for these shielding measures to function reliably, proper grounding is essential. Only a continuous conductive connection ensures that electromagnetic energy is safely dissipated and that the shielding concept performs as intended.

Integrated shielding meshes for UAVs and mobile electronic systems

For UAVs and mobile electronic systems, every gram counts. At the same time, navigation systems, sensors, cameras, communication equipment, and control systems require reliable protection against electromagnetic interference. Conventional solutions using metal enclosures or additional shielding, however, can increase both weight and manufacturing complexity.

This is where fine, conductive metal wire mesh integrated directly into plastic or composite enclosures offers an effective solution. The enclosure combines multiple functions: It provides a lightweight structural component while also incorporating electromagnetic shielding. Depending on the material and integration process, the mesh can additionally contribute to mechanical reinforcement.

The weight savings are significant: With comparable EMI shielding performance, this technology can reduce shielding weight by up to 80% compared with conventional sheet metal solutions.

FAQ – Frequently asked questions about EMC shielding in the security sector

Electromagnetic compatibility means that devices operate without interfering with one another electrically or electromagnetically.

Material selection depends on the targeted frequency range and required shielding effectiveness. Common materials include copper, stainless steel and brass.

Fine metal mesh reflects or absorbs electromagnetic waves, preventing them from passing through.

Requirements are defined primarily by MIL‑STD‑461 and NATO guidelines.

The appropriate specification depends on the required shielding performance and installation conditions. Factors such as environmental influences and the necessary stability or flexibility must be considered. In addition to square meshes with a smooth weave, long mesh structures and various types of weave may be suitable, depending on the application.

Thanks to its high flexibility, shielding mesh can typically be added to existing applications. In practice, retrofitting shielding measures is primarily used to secure rooms and buildings.