Konpang, J.; Akkaralaertsest, T. .; Tubtongdee, S. .; Sirikham, A.; Intarawiset, N. . Design of a Triple-Band Microstrip Bandpass Filter With Wide Harmonic Suppression Based on Stepped-Impedance Resonators. RMUTL.Eng.J. 2023, 8, 1-10.