1. Wang, H. and L. Zhu, "Ultra-wideband bandpass filter using back-to-back microstrip-to-CPW transition structure," Electronics Letters, Vol. 41, No. 24, Nov. 24, 2005.
2. Li, K., D. Kurita, and T. Matsui, "An ultra-wideband bandpass filter using broadside-coupled microstrip-coplanar waveguide structure," IEEE MTT-S Int. Dig., 675-678, Jun. 2005.
3. Kuo, T. N., S. C. Lin, and C. H. Chen, "Compact ultra-wideband bandpass filters using composite microstrip-coplanar-waveguide structure," IEEE Trans. Microw. Theory Tech., Vol. 54, No. 10, 3772-3778, Oct. 2006.
doi:10.1109/TMTT.2006.881624
4. An, J., G. M.Wang, W. D. Zeng, and L. X. Ma, "UWB filter using defected ground structure of von koch fractal shape slot," Progress In Electromagnetics Research Letters, Vol. 6, 61-66, 2009.
doi:10.2528/PIERL08121309
5. Song, K. and Q. Xue, "Compact ultra-wideband (UWB) bandpass filters with multiple notched bands," IEEE Microwave and Wireless Component Letters, Vol. 20, 447-449, Aug. 2010.
doi:10.1109/LMWC.2010.2050303
6. Feng, W., Q. Y. Wu, X. W. Shi, and L. Chen, "Compact UWB bandpass filters with dual notched bands based on SCRLH resonator," IEEE Microwave and Wireless Component Letters, Vol. 21, No. 1, 28-30, Jan. 2011.
doi:10.1109/LMWC.2010.2088113
7. Liu, B.-W., Y.-Z. Yin, Y. Yang, S.-H. Jing, and A.-F. Sun, "Compact UWB bandpass filter with two notched bands based on electromagnetic bandgap structures," Electronics Letters, Vol. 47, No. 13, Jun. 23, 2011.
8. Feng, W., W. T. Li, X. W. Shi, and Q. L. Huang, "Compact UWB bandpass filters with triple-notched bands using triple mode stepped impedance resonator," IEEE Microwave and Wireless Component Letters, Vol. 22, No. 10, 512-514, Oct. 2012.
9. Ting, S. W., K. W. Tam, and R. P. Martins, "Miniaturized microstrip lowpass filter with wide stopband using double equilateral U-shaped defected ground structure," IEEE Microwave and Wireless Component Letters, Vol. 16, No. 5, 240-242, May 2006.
doi:10.1109/LMWC.2006.873592
10. Zeland Software Inc., IE3D 14.0, 2008.
11. Zhu, L., R. Li, and S. Sun, Microwave Bandpass Filter for Wideband Communications, Wiley, 2012.
doi:10.1002/9781118197981
12. Hong, S.-J. and B. M. Karyamapudi, "A general circuit model for defected ground structures in planar transmission lines," IEEE Microwave and Wireless Component Letters, Vol. 15, No. 10, 706-708, Oct. 2005.
doi:10.1109/LMWC.2005.856832