Harmonic Suppression of Parallel Coupled-Line Bandpass Filters using Defected Microstrip Structure
Keywords:
Defected Microstrip Structure (DMS), harmonic suppression, parallel coupled-line filterAbstract
This paper presents a novel miniaturized parallel coupled-line bandpass filter by etching some slot resonators on the strip for suppressing the first spurious response. These slots perform a serious LC resonance property in certain frequency and suppress the spurious signals. By properly tuning these slot dimensions, multiple closed notches can be generated in the vicinity of spurious harmonic and a wide stopband can be obtained. Slot on the strip that is called Defected Microstrip Structure (DMS). The DMS interconnection disturbs the current distribution only across the strip, thereby giving a modified microstrip line with certain stop band and slow-wave characteristics. The simulation and measurement of a 4.7 GHz prototype bandpass filter are presented. The measured results show a satisfactory rejection level more than 30 dB at first spurious passband without affecting the passband response. Good agreement between the experimental and full-wave simulated results has been achieved.
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References
M. D. Pozar, Microwave Engineering, New York, Wiley, ch. 8, pp. 477-485, 2004.
D. Jiang, Y. Xu, R. Xu, and W. Lin, “A novel bandpass filters using complementary split ring resonator loaded half mode substrate integrated waveguide,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 28, no. 2, pp. 143-149, February 2013.
L. Yang, Y. Hongchun, W. Yawei, and X. Shaoqiu, “Ultra-wideband bandpass filter based on parallelcoupled microstrip lines and defected ground structure,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 28, no. 1, pp. 21-26, January 2013.
X. Li and J. Zeng, “A novel dual-band microstrip bandpass filter design and harmonic suppression,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 28, no. 4, pp. 348-352, April 2013.
J.-T. Kuo, S.-P. Chen, and M. Jiang, “Parallelcoupled microstrip filters with over coupled end stages for suppression of spurious responses,” IEEE Microw. Wirel. Compon. Lett., vol. 13, no. 10, pp. 440-442, October 2003.
I. J. Bahl, “Capacitively compensated high performance parallel coupled microstrip filters,” IEEE MTT-S Int. Microw. Symp. Dig., pp. 679-682, June 1989.
T. Lopetegi, M. A. G. Laso, J. Hernandez, M. Bacaicoa, D. Benito, M. J. Garde, M. Sorolla, and M. Guglielmi, “New microstrip ‘wiggly line’ filters with spurious passband suppression,” IEEE Trans. Microw. Theory Tech., vol. 49, no. 9, pp. 1593- 1598, September 2001.
B. S. Kim, J. W. Lee, and M. S. Song, “An implementation of harmonic-suppression microstrip filters with periodic grooves,” IEEE Microw. Wirel. Compon. Lett., vol. 14, no. 9, pp. 413-415, September 2004.
I. K. Kim, N. Kingsley, M. Morton, R. Bairavasubramanian, J. Papapolymerou, M. M. Tentzeris, and J. G. Yook, “Fractal-shaped microstrip coupled-line bandpass filters for suppression of second harmonic,” IEEE Trans. Microw. Theory Tech., vol. 53, no. 9, pp. 2943-2948, September 2005.
J. B. Pendry, A. J. Holden, D. J. Robbins, and W. J. Stewart, “Magnetism from conductors and enhanced nonlinear phenomena,” IEEE Trans. Microw. Theory Tech., vol. 47, no. 1, pp. 2075- 2084, November 1999.
R. Azadegan and K. Sarabandi, “High-Q doublespiral slotline resonator filters,” IEEE Trans. Microw. Theory Tech., vol. 52, no. 1, pp. 1548- 1557, May 2004.
J. Bonache, F. Martin, I. Gil, and J. Garcia-Garcia, “Novel microstrip filters based on complementary split rings resonators,” IEEE Trans. Microw. Theory Tech., vol. 54, no. 1, pp. 265-271, January 2006.
J. A. Tirado-Mendez and H. Jardon-Aguilar, “Comparison of defected ground structure (DGS) and defected microstrip structure (DMS) behavior at high frequencies,” Proc. 1st Conf. Electrical and Electronics Engineering, Acapulco, Mexico, pp. 7- 10, September 2004.
J. A. Tirado-Meґndez, H. Jardoґn-Aguilar, F. Iturbide-Saґnchez, I. Garcia-Ruiz, V. MolinaLopez, and R. Acevo-Herrera, “A proposed defected microstrip structure (DMS) behavior for reducing rectangular patch antenna size,” Microwave Opt. Technol. Lett., vol. 43, pp. 481-484, October 2004.
S. Zhang, J. K. Xiao, Z. H. Wang, and Y. Li, “Novel low pass filters using a defected microstrip structure,” Microwave J., vol. 49, no. 9, pp. 118, September 2006.
M. Kazerooni and A. Cheldavi, “Unit length parameters, transition sharpness and level of radiation in defected microstrip structure (DMS) and defected ground structure (DGS) interconnections,” Prog. Electromagn. Res., vol. 10, pp. 93-102, 2009.
