volume | PIER Journals

Abstract

In this paper, a synthesis method is presented for Chebyshev type II band-pass filters in the microwave frequency range. We investigate the cause of the second harmonic passband of coupled-serial-shunted lines bandpass filters. Filters are employed substrate suspension, wavy-edge coupling, ring resonators, defect ground structure (DGS), and a combination of the wavy-edge coupling and ring resonators may be used and were investigated to suppress the harmonic pass-band. With a combination of the wavy-edge coupled-lines and ring resonators, the harmonic pass-band of the parallel-coupled line filter is rejected more effectively. Several filters are fabricated and measured to demonstrate the design.

1. Pozar, D. M., Microwave Engineering, 2nd edition, Ch. 8, Wiley, New York, 1998.

2. Cohn, S. B., "Parallel-coupled transmission-line-resonator filters," IEEE Trans. Microw. Theory Tech., Vol. 6, No. 4, 223-231, Apr. 1958.
doi:10.1109/TMTT.1958.1124542 Google Scholar

3. Cristal, E. G. and S. Frankel, "Hairpin-line and hybrid hairpin-line/halfwave parallel-coupled-line filters," IEEE Trans. Microw. Theory Tech., Vol. 20, No. 11, 719-728, Nov. 1972.
doi:10.1109/TMTT.1972.1127860 Google Scholar

4. Hong, J. S. and M. J. Lancaster, "Design of highly selective microstrip bandpass filters with a single pair of attenuation poles at finite frequencies," IEEE Trans. Microw. Theory Tech., Vol. 48, No. 7, 1098-1107, Jul. 2000.
doi:10.1109/22.848492 Google Scholar

5. Hong, J.-S. G. and M. J. Lancaster, Microstrip Filter for RF/Microwave Application, Wiley, New York, 2001.

6. Lee, S. Y. and C. M. Tsai, "New cross-coupled filter design using improved hairpin resonators," IEEE Trans. Microw. Theory Tech., Vol. 48, No. 12, 2482-2490, Dec. 2000.
doi:10.1109/22.899002 Google Scholar

7. Kuo, J. T. and H. P. Lin, "Dual-band bandpass filter with improved performance in extended upper rejection band," IEEE Trans. Microw. Theory Tech., Vol. 57, No. 4, 824-828, Apr. 2009.
doi:10.1109/TMTT.2009.2015040 Google Scholar

8. Lopetegi, T., M. A. G. Laso, F. Falcone, F. Martin, J. Bonache, J. Garcia, L. Perez-Cuevas, M. Sorolla, and M. Guglielmi , "Microstrip `wiggly-line' bandpass filters with multispurious," IEEE Microw. Wireless Compon. Lett., Vol. 14, No. 11, 531-533, Nov. 2004.
doi:10.1109/LMWC.2004.837062 Google Scholar

9. Lopetegi, T., M. A. G. Laso, M. J. Erro, D. Benito, M. J. Garde, F. Falcone, and M. Sorolla, "Novel photonic bandgap microstrip structures using network topology," Microwave Opt. Technol. Lett., Vol. 25, 33-36, Apr. 2000.
doi:10.1002/(SICI)1098-2760(20000405)25:1<33::AID-MOP10>3.0.CO;2-T Google Scholar

10. Kim, B. S., J. W. Lee, and M. S. Song, "An implementation of harmonic-suppression microstrip filters with periodic grooves," IEEE Microw. Wireless Compon. Lett., Vol. 14, No. 9, 413-415, Sept. 2004.
doi:10.1109/LMWC.2004.832063 Google Scholar

11. Joan, G.-G., F. Martin, and F. Falcone, "Spurious passband suppression in microstrip coupled line band pass filters by means of split ring resonators ," IEEE Microw. Wireless Compon. Lett., Vol. 14, No. 9, 416-418, Sept. 2004.
doi:10.1109/LMWC.2004.832066 Google Scholar

12. Marques, R., F. Mesa, J. Martel, and F. Medina, "Comparative analysis of edge- and broadside-coupled split ring resonators of metamaterial design-theory and experiments," IEEE Trans. Antennas Propagat., Vol. 51, No. 10, 2572-2581, Oct. 2003.
doi:10.1109/TAP.2003.817562 Google Scholar

13. Chen, C.-F., T.-Y. Huang, and R.-B. Wu, "Design of microstrip bandpass filters with multi-order spurious-mode suppression," IEEE Trans. Microw. Theory Tech., Vol. 53, No. 12, 3788-3793, Dec. 2005.
doi:10.1109/TMTT.2005.859869 Google Scholar

14. Mokhtaari, M., K. Rambabu, J. Bornemann, and S. Amari, "Advanced stepped-impedance dual-band filters with wide second stopbands," Proc. Asia{Pacific Microw. Conf., 2285-2288, 2007. Google Scholar

15. Park, J. S., J. S. Yun, and D. Ahn, "A design of the novel coupled-line bandpass filter using defected ground structure with wide," IEEE Microw. Wireless Compon. Lett., Vol. 10, No. 9, 124-126, Sept. 2002. Google Scholar

16. Kuo, J.-T., W.-H. Hsu, and W.-T. Huang, "Parallel-coupled microstrip filters with suppression of harmonic response," IEEE Microw. Wireless Compon. Lett., Vol. 12, No. 10, 383-385, Oct. 2002. Google Scholar

17. Hu, W. L., T. Yoshimasu, and H. W. Liu, "A novel dual-mode square loop passband filter with second spurious passband suppression," International Conference Comm. Circuits and Systems Proceedings, Vol. 4, 2273-2276, Jun. 2006.
doi:10.1109/ICCCAS.2006.285131 Google Scholar

18. Rehner, R., D. Schneiderbanger, M. Sterns, S. Martius, and L.-P. Schmidt, "Novel coupled microstrip wideband filters with spurious response suppression," European Microwave Conference, 858-861, Oct. 2007. Google Scholar

19. Ahn, D., J. S. Park, C. S. Kim, J. Kim, Y. Qian, and T. Itoh, "A design of low-pass filter using the novel microstrip defected ground structure," IEEE Trans. Microw. Theory Tech., Vol. 49, 86-93, Jan. 2001.
doi:10.1109/22.899965 Google Scholar

20. Gupta, K. C., R. Gary, and I. J. Bahl, Microstrip Lines and Slotlines, Artech House, 1996.

21. Horno, M. and F. Medina, "Multilayer planar structures for high-directivity directional coupler design," IEEE Trans. Microw. Theory Tech., Vol. 34, 1442-1449, Dec. 1986.
doi:10.1109/TMTT.1986.1133561 Google Scholar

22. Pozar, D. M, Microwave Engineering, 2nd Edition, 160-163, Wiley, New York, 1998.

23. Oppenheim, A. V. and R. W. Schafer, Discrete-Time Signal Processing, Englewood Cliffs, Prentice-Hall, NJ, 1998.

24. Tsai, L.-C., K.-L. Chen, and C.-W. Hsue, "Design of wide-band band pass filters using discrete time domain techniques," Microwave and Optical Technology Letters, Vol. 43, 264-266, Nov. 2004. Google Scholar

Prof. Lin-Chuan Tsai