Ferrite Shield with Dual Coils for Active EM Attack Protection

The patent applies preliminary action by embedding integrity sensors and attack detection circuits within the encapsulation structure before the actual attack occurs. These pre-positioned sensors continuously monitor for attack conditions and can trigger countermeasures in real-time, transforming the passive shielding approach into an active protection system that is ready to respond immediately upon detecting an attack attempt.

The patent implements feedback by incorporating sensors that continuously monitor the encapsulation integrity and attack conditions, then feed this information back to a control system. This feedback mechanism enables real-time detection of attacks and allows the system to respond dynamically by triggering countermeasures such as scrambling operations or activating additional shielding, thereby resolving the contradiction between passive protection and active response capability.

The patent applies the intermediary principle by introducing a magnetic core material (such as ferrite) as a mediator between the detection coil and the electronic circuit. This magnetic core concentrates and guides the magnetic flux generated by the attack probe, enhancing the detection signal while preventing the detection coil itself from generating disruptive electromagnetic fields that could damage the circuit. The magnetic core acts as a buffer that isolates the circuit from harmful electromagnetic effects.

The patent implements local quality by positioning the magnetic core material specifically at strategic locations where attack probes are most likely to approach, rather than uniformly throughout the entire encapsulation. This localized placement optimizes the detection capability at critical points while minimizing the overall electromagnetic disruption to the circuit, thereby resolving the contradiction between detection sensitivity and circuit safety.

The patent implements feedback by incorporating integrity sensors within the encapsulation material that continuously monitor the material's condition and attack resistance properties. These sensors provide real-time feedback about the encapsulation's integrity status, allowing the system to detect when the material has been compromised by physical or chemical abrasion. This feedback mechanism enables the system to verify its own integrity and respond appropriately, transforming the passive deformation approach into an active monitoring system.

The patent applies self-service by enabling the encapsulation material to autonomously monitor and report its own integrity status through embedded sensors. The encapsulation structure serves itself by detecting its own degradation or compromise conditions and communicating this information to the system, eliminating the need for external verification systems. This self-monitoring capability resolves the contradiction by allowing the passive material to actively verify its own integrity.