1. Hong, J. S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, J. Wiley and Sons, New York, USA, 2001.
doi:10.1002/0471221619
2. Weng, M.-H., S.-K. Liu, H.-W. Wu, and C.-H. Hung, "A dual-band bandpass filter having wide and narrow bands simultaneously using multilayered stepped impedance resonators," Progress In Electromagnetics Research Letters, Vol. 13, 139-147, 2010.
doi:10.2528/PIERL10022401
3. Lv, D.-D., L. Meng, and Z. Zou, "Miniaturized HMSIW dual-band filter based on CSRRs and microstrip open-stubs," Progress In Electromagnetics Research Letters, Vol. 77, 97-102, 2018.
doi:10.2528/PIERL18030202
4. Xu, J., W. Wu, and C. Miao, "Compact microstrip dual-/tri-/quad-band bandpass filter using open stubs loaded shorted stepped-impedance resonator," IEEE Trans. Microw. Theory Tech., Vol. 61, 3187-3199, 2013.
doi:10.1109/TMTT.2013.2273759
5. Wu, H.-W. and R.-Y. Yang, "A new quad-band bandpass filter using asymmetric stepped impedance resonators," IEEE Microw. Wireless Compon. Lett., Vol. 21, No. 4, 203-205, Apr. 2011.
doi:10.1109/LMWC.2011.2106153
6. Zhang, Y., L. Gao, and X. Y. Zhang, "Compact quad-band bandpass filter for DCS/WLAN/WiMAX/5G Wi-Fi application," IEEE Microw. Wireless Compon. Lett., Vol. 25, No. 10, 645-647, May 2015.
doi:10.1109/LMWC.2015.2463227
7. Chen, C., "Design of a compact microstrip quint-band filter based on the tri-mode stub-loaded stepped-impedance resonators," IEEE Microw. Wireless Compon. Lett., Vol. 22, No. 7, 357-359, Jul. 2012.
doi:10.1109/LMWC.2012.2202894
8. Wu, Y., L. Cui, Z. Zhuang, W. Wang, and Y. Liu, "A simple planar dual-band bandpass filter with multiple transmission poles and zeros," IEEE Trans. Circuits Syst. II: Exp. Briefs, Vol. 65, 56-60, 2018.
doi:10.1109/TCSII.2017.2702191
9. Wu, Y., E. Fourn, P. Besnier, and C. Quendo, "Direct synthesis of multiband bandpass filters with generalized frequency transformation methods," IEEE Trans. Microw. Theory Tech., Vol. 69, 3820-3831, 2021.
doi:10.1109/TMTT.2021.3086835
10. Quendo, C., et al., "Planar tri-band filter based on dual behavior resonator," Proc. Eur. Microw. Conf., 269-272, Oct. 2005.
11. Garcia, R. G., R. L. Sanchez, D. Psychogiou, and D. Peroulis, "Multi-stub-loaded differential mode planar multiband bandpass filters," IEEE Trans. on Circuits and Systems - II: Express Briefs, Vol. 65, No. 3, 271-275, 2018.
doi:10.1109/TCSII.2017.2688336
12. Hsu, K. W., J. H. Lin, and W. H. Tu, "Compact sext-band bandpass filter with sharp rejection response," IEEE Microw. Wireless Compon. Lett., Vol. 24, 593-595, 2014.
doi:10.1109/LMWC.2014.2328895