1. Wang, S.-N. and N.-W. Chen, "Compact, ultra-broadband coplanar-waveguide bandpass filter with excellent stopband rejection," Progress In Electromagnetics Research B, Vol. 17, 15-28, 2009.
doi:10.2528/PIERB09071008
2. Chen, H. and Y.-X. Zhang, "A novel and compact UWB bandpass filter using microstrip fork-form resonators," Progress In Electromagnetics Research, Vol. 77, 273-280, 2007.
doi:10.2528/PIER07082302
3. Mandal, M. K. and S. Sanyal, "Compact wideband bandpass filter," IEEE Microwave Wireless Compon. Lett., Vol. 16, 46-49, 2006.
doi:10.1109/LMWC.2005.860012
4. Veselago, V. G., "The electrodynamics of substances with simultaneously negative values of ε and μ," Sov. Phys. Usp., Vol. 10, No. 4, 509-514, 1969.
doi:10.1070/PU1968v010n04ABEH003699
5. Smith, D. R., W. J. Padilla, D. C. Vier, S. C. Nemat-Nasser, and S. Schultz, "Composite medium with simultaneously negative permeability and permittivity," Phys. Rev. Lett., Vol. 84, 4184-4187, 2000.
doi:10.1103/PhysRevLett.84.4184
6. Chen, W.-L., "Investigations into the applications of fractal geometry in microwave engineering,", A Dissertation Submitted to Air Force Engineering University in Candidacy for Degree of Doctor of Philosophy, Xi'an, Dec. 2008.
doi:10.1103/PhysRevLett.84.5528
7. Baena, J. D., R. Marques, F. Medina, and J. Martel, "Artificial magnetic metamaterial design by using spiral resonators," Phys. Rev. B, Vol. 69, 014402(1)-(5), 2004.
8. Dai , G. and M. Xia, "Novel miniaturized bandpass filters using spiral-shaped resonators and window feed structures," Progress In Electromagnetics Research, Vol. 100, 235-243, 2010.
doi:10.2528/PIER09120401
9. Chen , H., L. Ran, J. Huangfu, X. Zhang, and K. Chen, "Lefthanded materials composed of only S-shaped resonators," Phys. Rev. E, Vol. 70, 057605(1)-(4), 2004.
10. Wang, D., L. Ran, H. Chen, M. Mu, J. A. Kong, and B.-I. Wu, "Experimental validation of negative refraction of metamaterial composed of single side paired S-ring resonators," Appl. Phys. Lett., Vol. 90, 254103(1)-(3), 2007.
11. Falcone, F., T. Lopetegi, J. D. Baena, et al. "Effective negative-ε stopband microstrip lines based on complementary split ring resonators," IEEE Microwave and Wireless Components Letters, Vol. 14, No. 6, 280-282, 2004.
doi:10.1109/LMWC.2004.828029
12. Liu, J.-C., H.-C. Lin, and B.-H. Zeng, "Complementary split ring resonators with dual mesh-shaped couplings and defected ground structures for wide pass-band and stop-band BPF design," Progress In Electromagnetics Research Letters, Vol. 10, 19-28, 2009.
13. Selga, J., F. Aznar, A. Velez, M. G. J. Bonache, and F. Martin, "Low-pass and high-pass microwave filters with transmission zero based on metamaterial concepts," IEEE International Workshop on Antenna Technology, 1-4, 2009.
doi:10.1109/IWAT.2009.4906914
14. Kim, J.-H., I.-K. Kim, J.-G. Yook, and H.-K. Park, "A slow-wave structure with Koch fractal slot loops," Microwave and Optical Technology Letters, Vol. 34, No. 2, 87-88, 2002.
doi:10.1002/mop.10381
15. Crnojevic'-Bengin, V. and V. R. B. Jokanovic, "Fractal geometries of complementary split-ring resonators," IEEE Transactions on Microwave Theory and Techniques, Vol. 56, No. 10, 2312-2321, 2008.
doi:10.1109/TMTT.2008.2003522
16. Lim, J., J. Lee, J. Lee, S.-M. Han, D. Ahn, and Y. Jeong, "A new calculation method for the characteristic impedance of transmission lines with modified ground structures or perturbation," Progress In Electromagnetics Research, Vol. 106, 147-166, 2010.
doi:10.2528/PIER10052602
17. Wu, G.-L., W. Mu, X.-W. Dai, and Y.-C. Jiao, "Design of novel dual-band bandpass filter with microstrip meander-loop resonator and CSRR DGS," Progress In Electromagnetics Research, Vol. 78, 17-24, 2008.
doi:10.2528/PIER07090301
18. Zhang, J., J.-Z. Gu, B. Cui, and X. W. Sun, "Compact and harmonic suppression open-loop resonator bandpass filter with tri-section SIR," Progress In Electromagnetics Research, Vol. 69, 93-100, 2007.
doi:10.2528/PIER06120702
19. Velazquez-Ahumada, M. D. C., J. Martel-Villagr, F. Medina, and F. Mesa, "Design of band-pass filters using stepped impedance resonators with floating conductors," Progress In Electromagnetics Research, Vol. 105, 31-48, 2010.
doi:10.2528/PIER10042010