Resonators in Modal Filter as a Resorse for Improving its Characteristics

This paper presents a novel approach to suppressing ultra-wideband (UWB) interference using a strong-coupled modal filter. Specifically, T-resonators are proposed as a means of improving the interference-suppression characteristics. The optimal resonators geometric parameters were obtained by the heuristic search method. Results show that the use of a pair of resonators can reduce the amplitude of UWB interference at the output by half. To validate the results, simulations were conducted using different approaches, which showed good agreement with each other based on the waveforms of the frequency response. The paper also highlights the use of N-norms to estimate the hazard of UWB interference after suppression. The N-norm values suggest a reduced probability of component burnout and equipment damage. In conclusion, this paper demonstrates the potential for additional suppression of UWB interference in modal filters using T-resonators. This approach could have significant implications for improving the functionality and reliability of electrical circuits in various applications.