Krongkitsiri W, Krongkitsiri P, Jurajaturasiraratana S. A Wideband Bandpass Filter with Stepped Impedance Resonator on Microstrip . J. Adv. Dev. Eng. Sci. [internet]. 2023 Aug. 28 [cited 2025 Apr. 12];8(22):73-8. available from: https://ph03.tci-thaijo.org/index.php/pitjournal/article/view/904