S R, M A, R BR, C M. Compact Ultra-Wide-Stopband Microwave Bandpass Filter with Multiple Transmission Zeros by Integrating an L-Shaped Bandpass Filter and a Stepped Impedance Lowpass Filter. IEEE LAT AM T [Internet]. 2025 Apr. 17 [cited 2026 Apr. 26];23(5):437-43. Available from: https://latamt.ieeer9.org/index.php/transactions/article/view/9327