1. Falcone, F., T. Lopetegi, J. D. Baena, R. Marques, F. Martin, and M. Sorolla, "Effective negative-ε stop-band microstrip lines based on complementary split ring resonators," IEEE Microwave Wireless Compon. Lett., Vol. 14, 280-282, 2004.
doi:10.1109/LMWC.2004.828029
2. Marques, R., J. Martel, F. Mesa, and F. Medina, "Left handed media simulation and transmission of EM waves in sub-wavelength SRR-loaded metallic waveguides," Phys. Rev. Lett., Vol. 89, 183901(1)-183901(4), 2002.
doi:10.1103/PhysRevLett.89.183901
3. Falcone, F., T. Lopetegi, M. A. G. Laso, J. D. Baena, J. Bonache, R. Marques, F. Martin, and M. Sorolla, "Babinet principle applied to the design of metasurfaces and metamaterial," Phys. Rev. Lett., Vol. 93, 197401, 2004.
doi:10.1103/PhysRevLett.93.197401
4. Baena, J. D., J. Bonache, F. Martin, et al. "Equivalent-circuit models for split-ring resonators and complementary split-ring resonators coupled to planar transmission lines," IEEE. Trans. Microw. Theory Tech., Vol. 53, No. 4, 1451-1461, Apr. 2005.
doi:10.1109/TMTT.2005.845211
5. Bonache, J., M. Gil, I. Gil, J. Garcia-Garcia, and F. Martin, "On the electrical characteristics of complementary metamaterial resonators," IEEE Microw. Wireless Compon. Lett., Vol. 16, No. 10, 543-545, Oct. 2007.
doi:10.1109/LMWC.2006.882400
6. Bonache, J., M. Gil, O. Garcia-Abad, and F. Martin, "Parametric analysis of microstrip lines loaded with complementary split ring resonators," Microw. and Opt. Tech. Lett., Vol. 50, No. 8, Aug. 2008.
7. Hong, J.-S. and M. J. Lancaster, "Couplings of microstrip square open-loop resonators for cross-coupled planar microwave filters," IEEE Trans. Microwave Theory Tech., Vol. 44, 2099-2109, Nov. 1996.
doi:10.1109/22.543968
8. Hong, J.-S. and M. J. Lancaster, "Canonical microstrip filter using square open-loop resonators," IEEE Electron. Lett., Vol. 31, No. 23, 2020-2022, Nov. 1995.
doi:10.1049/el:19951370
9. Pozar, D. M. and Microwave Engineering, , 3rd Ed., Chapter 6, Wiley, New York, 2005.
10. Hong, J.-S. and M. J. Lancaster, Microstrip Filters For RF/Microwave Applications, Wiley, 2001.
doi:10.1002/0471221619
11. Hong, J.-S. and M. J. Lancaster, "Microstrip cross-coupled trisec-tion bandpass filters with asymmetric frequency characteristics," IEE Proc. Microw. Antennas Propag., Vol. 146, No. 1, 84-90, Feb. 1999.
doi:10.1049/ip-map:19990146
12. Levy, R., "Direct synthesis of cascaded quadruplet (CQ) filters," IEEE Trans. Microwave Theory Tech., Vol. 43, 2940-2944, Dec. 1995.
doi:10.1109/22.476634
13. Tsai, C.-M., S.-Y. Lee, and C.-C. Tsai, "Performance of a planar filter using a zero-degree feed structure," IEEE Trans. Microwave Theory Tech., Vol. 50, 2362-2367, 2002.
doi:10.1109/TMTT.2002.803421
14. Zhou, L., S. Liu, H. F. Zhang, X.-K. Kong, and Y.-N. Guo, "Compact dual-band bandpass filter using improved split ring resonators based on stepped impedance resonator," Progress In Electromagnetics Research Letters, Vol. 23, 57-63, 2011.
15. Fallahzadeh, S. and M. Tayarani, "A compact microstrip bandstop filter," Progress In Electromagnetics Research Letters, Vol. 11, 167-172, 2009.
doi:10.2528/PIERL09082407