S, Ramkumar, Anitha M, Boopathi Rani R, and Muthuramya C. “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 Latin America Transactions 23, no. 5 (April 17, 2025): 437–443. Accessed April 26, 2026. https://latamt.ieeer9.org/index.php/transactions/article/view/9327.