University of Sistan and Baluchestan International Journal of Industrial Electronics Control and Optimization 2645-3517 Articles in Press 2025 09 15 A Mathematical Framework for Designing Precise RBW Filters Using Standard Implementation Techniques in EMI Applications 9381 10.22111/ieco.2025.51495.1678 EN Seyed Fariborz Zarei Department of Electrical and Computer Engineering, Qom University of Technology, Qom, Iran. 0000-0001-5582-1349 Saeed Hasanzadeh Department of Electrical and Computer Engineering, Qom University of Technology, Qom, Iran. Journal Article 2025 03 22 This paper presents a comprehensive approach to the design of Resolution Bandwidth (RBW) filters specifically for Electromagnetic Interference (EMI) applications. We propose a mathematical modeling method that accurately captures the characteristics of standard RBW filters, which are essential for precise EMI noise measurements. The proposed approach utilizes paired complementary second-order filters with symmetrical cutoff frequencies to ensure compliance with CISPR-16 standards. The methodology underscores the importance of aligning theoretical models with real-world filter behavior, ensuring that the resulting models are both accurate and reliable. By establishing a robust framework for RBW filter design, the method enables optimized EMI system performance and the implementation of appropriate filtering solutions. Validation is carried out through simulations using a 150 kHz signal with a dynamically ramped amplitude increase, demonstrating high accuracy and strong performance under both transient and steady-state conditions. Despite the challenging test scenarios, the results confirm that the proposed filter model remains accurate and effective even under worst-case EMI conditions. https://ieco.usb.ac.ir/article_9381_e779f61a00f7a0d31e8a1e4d4df5068e.pdf