ELECTROMAGNETIC INTERFERENCE ATTENUATION IN A STRUCTURE WITH DOUBLE MODAL REDUNDANCY

Abstract

This paper examines a method for enhancing the fault tolerance of radio-electronic equipment, termed modal redundancy, which combines the principles of redundancy and modal filtering. The essence of this method lies in utilizing strong electromagnetic coupling between two or more redundant conductors to mitigate electromagnetic interference. This approach offers several advantages, as the system can continue to operate even in the event of failure of one or more conductors, which is crucial for ensuring uninterrupted device operation. The modal redundancy method is effective in situations where it is necessary to minimize the risks of signal loss and reduce the impact of interference, making it valuable in various fields where high operational stability of equipment is required. Research Objective: To investigate the characteristics of asymmetric structures implemented using double modal redundancy and to eva¬luate their effectiveness under various operating conditions. Materials and Methods. To achieve the stated objective, electrodynamic and quasi-static analyses, as well as high-frequency measurements, were employed. The study was conducted in three stages: before the failure of the main conductor, after the first failure, and after the second failure, allowing for a detailed assessment of the system's behavior at diffe¬rent stages. Results. Frequency and time-domain characteristics of asymmetric structures with modal redundancy were obtained. The FSV method was used to analyze the data, enabling a comparative analysis of simulation and measurement data. The results demonstrated the high effectiveness of the method in mitigating electromagnetic interference and ensuring stable system operation, even when power is switched to redundant conductors. Conclusion. The presented investigated structures confirm the high practical applicability of the modal redundancy method for enhancing the fault tolerance of radio-electronic systems.