volume | PIER Journals

Abstract

We propose single metal layer metamaterial bandpass filters based on compact complementary u-shaped resonators. Previously, metamaterial bandpass filters could only be achieved if a second conducting layer was utilized. Here, we propose a resonator concept that can directly be integrated with a single sided coplanar waveguide, enabling low fabrication costs and simple system integration. Furthermore, already a single unit cell yields a pronounced bandpass behavior without the need for cascading multiple resonators. Both, measurements and numerical simulations are presented. Using RO3003 as substrate, a low insertion loss of 1.71 dB and a corresponding 3-dB bandwidth ratio of 3.1% is achieved.

1. Liao, S., P. Sun, H. Chen, and X. Liao, "Compact-size coplanar waveguide bandpass filter," IEEE Microwave and Wireless Components Letters, Vol. 13, No. 6, 241-243, 2003.
doi:10.1109/LMWC.2003.814601 Google Scholar

2. Simons, R. N., Coplanar Waveguide Circuits, Components, and Systems, Wiley-IEEE Press, 2001.

3. Wolff, I., "Coplanar Microwave Integrated Circuits," Wiley-Interscience, 2006. Google Scholar

4. Veselago, V. G., "The electrodynamics of substances with simultaneously negative values of ε and μ," Soviet Physics Uspekhi, Vol. 10, No. 4, 509-514, 1968.
doi:10.1070/PU1968v010n04ABEH003699 Google Scholar

5. Pendry, J. B., A. J. Holden, D. J. Robbins, and W. J. Stewart, "Magnetism from conductors and enhanced nonlinear phenomena," IEEE Trans. Microwave Theory and Technology, Vol. 47, 2075-2084, 1999.
doi:10.1109/22.798002 Google Scholar

6. Shelby, R. A., D. R. Smith, and S. Schultz, "Experimental verification of a negative index of refraction," Science, Vol. 292, 77-79, April 2001.
doi:10.1126/science.1058847 Google Scholar

7. Martin, F., F. Falcone, J. Bonache, R. Marques, and M. Sorolla, "Miniaturized coplanar waveguide stop band filters based on multiple tuned split ring resonator," IEEE Microwave Wireless Components Letters, Vol. 13, 511-514, 2003.
doi:10.1109/LMWC.2003.819964 Google Scholar

8. Al-Naib, I. A. I., C. Jansen, and M. Koch, "Compact CPW metamaterial resonators for high performance filters," Passive Microwave Components and Antennas, Vitaliy Zhurbenko (ed.), Chapter 20, Intech, 2010. Google Scholar

9. Al-Naib, I. A. I. and M. Koch, "Coplanar waveguides incorporating SRRs or CSRRs: A comprehensive study ," Progress In Electromagnetics Research B, Vol. 23, 343-355, 2010.
doi:10.2528/PIERB10061602 Google Scholar

10. Martin, F., J. Bonache, F. Falcone, M. Sorolla, and R. Marques, "Split ring resonator based left-handed coplanar waveguide," Applied Physics Letters, Vol. 83, No. 22, 4652-1-3, 2003.
doi:10.1063/1.1631392 Google Scholar

11. Crnojevic-Bengin, V., V. Radonic, and B. Jokanovic, "Left-handed microstrip lines with multiple complementary split-ring and spiral resonators," Microwave and Optical Technology Letters, Vol. 49, No. 6, 1391-1395, 2007.
doi:10.1002/mop.22427 Google Scholar

12. Ibraheem, I. A., J. Schoebel, and M. Koch, "Group delay characteristics in coplanar waveguide left-handed media," Journal of Applied Physics, Vol. 103, 024903-1-7, 2008. Google Scholar

13. Al-Naib, I. A. I., C. Jansen, and M. Koch, "Miniaturized bandpass filter based on metamaterials resonators: A conceptual study," Journal of Physics D: Applied Physics, Vol. 41, No. 20, 205002, 2008.
doi:10.1088/0022-3727/41/20/205002 Google Scholar

14. Isik, O. and K. P. Esselle, "Design of monofilar and bifilar Archimedean spiral resonators for metamaterial applications," IET Microw. Antennas Propag., Vol. 3, No. 6, 929-935, 2009.
doi:10.1049/iet-map.2008.0298 Google Scholar

15. Borja, A. L., J. Carbonell, V. E. Boria, and D. Lippens, "Highly selective left-handed transmission line loaded with split ring resonators and wires ," Applied Physics Letters, Vol. 94, No. 143503, 2009. Google Scholar

16. Ibraheem, I. A. and M. Koch, "Coplanar waveguide metamaterials: The role of bandwidth modifying slots," Applied Physics Letters, Vol. 91, 113517-1-3, 2007. Google Scholar

17. Ansoft HFSSr, http://www.ansoft.com.

18. Dib, N. I., L. P. B. Katehi, G. E. Ponchak, and R. N. Simons, "Theoretical and experimental characterization of coplanar waveguide discontinuities for filter applications," IEEE Trans. Microwave Theory and Technology, Vol. 39, No. 5, 873-882, 1991.
doi:10.1109/22.79116 Google Scholar

19. Ponchak, G. E. and L. P. B. Katehi, "Open- and short-circuit terminated series stubs in finite-width coplanar waveguide on silicon," IEEE Trans. Microwave Theory and Technology, Vol. 45, No. 6, 970-976, 1997.
doi:10.1109/22.588611 Google Scholar

20. MacLeod, H. A., Thin-film Optical Filters, Taylor & Francis, 2001.

21. Pozar, D. M., Microwave Engineering, John Wiley and Sons, 2005.

Dr. Ibraheem A. I. Al-Naib

Dr. Christian Jansen

Prof. Martin Koch