Bai, L. ., Y. . Zhuang, and Z. . Zeng. “A Highly Compact Sext-Band Bandpass Filter With Simple Structure and Wide Bandwidth”. Applied Computational Electromagnetics Society Journal (ACES), vol. 37, no. 10, Oct. 2022, pp. 1089-95, doi:10.13052/2022.ACES.J.371009.