Novel complementary split ring resonator (CSRR) is introduced to increase the stop bandwidth. Despite of their exotic behavior due to negative permittivity, their performance is limited by their stop bandwidth. The orientation of CSRR etched on the ground has strong coupling that can be altered for the increased stop bandwidth. The proposed design has measured stop band from 4~7.25 GHz whereas conventional CSRR of same dimension has stop band from 4.1~5.0 GHz.
2. 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.
3. Falcone, F., T. Lopetegi, J. D. Baena, R. Marque's, F. Martin, and M. Sorolla, "Effective negative-epsilon stop-band microstrip lines based on complementary split ring resonators," IEEE Microwave Wireless Compon. Lett., Vol. 14, 280-282, 2004.
4. Khan, S. N., Q. L. Zhang, and S. He, "Left handed microstrip transmission line loaded with combination of split ring resonator and complementary-SRR," Journal of Electromagnetic Waves and Applications, Vol. 22, 1857-1863, 2008.
5. Zhang, Q., S. N. Khan, and S. He, "Realization of left handedness through CSRRs and SRRs in microstrip line," Microwave and Optical Technology Letters, Vol. 51, No. 3, 757-760, March 2009.
6. Georgieva, A. R., "Investigation of a left-handed microstrip line," Microwave Review, 41-44, November 2006.
7. Bahrami, H., M. Hakkak, and A. Pirhadi, "Analysis and design of highly compact bandpass waveguide filter utilizing complementary split ring resonators," Progress In Electromagnetics Research, Vol. 80, 107-122, 2008.
8. Fu, S. and C. Tong, "A novel CSRR-based defected ground structure with dual-bandgap characteristics," Microwave and Optical Technology Letters, Vol. 51, No. 12, 2908-2910, December 2009.
9. Zhang, J., B. Cui, S. Lin, and X.-W. Sun, "Sharp-rejection low-pass ¯lter with controllable transmission zero using complementary split ring resonators," Progress In Electromagnetics Research, Vol. 69, 219-226, 2007.
10. Afkhami, A. and M. Tayarani, "Spurious response suppression in hairpin filter using CSRR merged in the filter structure," Progress In Electromagnetics Research C, Vol. 11, 137-146, 2009.
11. Selga, J., G. Siso, M. Gil, J. Bonache, and G. Martin, "Microwave circuit miniaturization with complementary spiral resonators: Applications to high pass filter and dual band components ," Microwave and Optical Technology Letters, Vol. 51, No. 11, 2741-2725, November 2009.
12. Darcia, J., F. Aznar, M. Gil, J. Bonache, and F. Marjtin, "Size reduction of SRRs for metamaterial and left handed media design," PIERS Proceedings, Vol. 3, 266-269, 2007.
13. Ekmekci, E. and G. Turhan-Sayan, "Comparative investigation of resonance characteristics and electrical size of the double-sided SRR, BC-SRR and conventional SRR type metamaterials for varying substrate parameters," Progress In Electromagnetics Research B, Vol. 12, 35-62, 2009.
14. Radonic, V., V. Crojecvic Bengin, and B. Jokanovic, On the Orientation of Split Ring Resonators in Metamaterials Media, Serbian, Nis, 645-648, September 2007.