A Novel Dual-Mode Wideband Band Pass Filter
Keywords:
Dual mode, microstrip bandpass filter, wide passbandAbstract
A novel Wideband (WB) Bandpass Filter (BPF) with improved passband performance using a Defected Ground Structure (DGS) is presented in this paper. The proposed BPF is composed of two novel basic WB resonators and six Dumbbell-Shaped (DS) DGSs. By cascading resonators we can achieve better skirt characteristics, and by using DS-DGSs under interdigital coupled I/O lines we can improve the return loss within the passband. The simulated and measured results are found in good agreement with each other showing a wide passband from 4.93 to 11.62 GHz, a wide upper stopband with around 25 dB attenuation up to 20 GHz, and sharp roll-offs around 0.03 in lower and upper edges.
Downloads
References
L. Yang, Y. Hongchun, W. Yawei, and X. Shaoqiu, “Ultra-wideband bandpass filter based on parallelcoupled microstrip lines and defected ground structure,” Appl. Comp. Electro. Soc. (ACES) Journal, vol. 28, no. 1, pp. 21-25, January 2013.
N. M. Garmjani and N. Komjani, “Improved microstrip folded tri-section stepped impedance resonator bandpass filter using defected ground structure,” Appl. Comp. Electro. Soc. (ACES) Journal, vol. 25, no. 11, pp. 975-983, November 2010.
M. Hayati, A. Khajavi, and H. Abdi, “A miniaturized microstrip dual-band bandpass filter using folded UIR for multimode WLANs,” Appl. Comp. Electro. Soc. (ACES) Journal, vol. 28, no. 1, pp. 35-40, January 2013.
S. Lotfi, S. V. Makki, and S. Majidifar, “Design of microstrip low-pass filter with ultra-wide stopband and sharp rejection,” International Journal of Engineering & Technology Sciences (IJETS), vol. 2, no. 1, pp. 47-57, 2014.
S. V. Makki, A. Ahmadi, S. Majidifar, H. Sariri, and Z. Rahmani, “Sharp response microstrip LPF using folded stepped impedance open stubs,” Radioengineering Journal, vol. 22, no. 1, pp. 328- 332, 2013.
H. Sariri, Z. Rahmani, A. Lalbakhsh, and S. Majidifar, “Compact LPF using T-shaped resonator,” Frquenz Journal, vol. 67, no. (1-2), pp. 17-20, 2013.
M. Hayati, S. Majidifar, and O. S. Fathabadi, “Compact microstrip lowpass filter with wide stopband and high attenuation,” Microwave Journal, April 2012.
“Revision of part 15 of the commission’s rules regarding ultra-wideband transmission systems,” First Note and Order Federal Communications Commission, ET-docket 2002, pp. 98-153, 2002.
R. Li and L. Zhu, “Compact UWB bandpass filter using stub-loaded multiple-mode resonator,” IEEE Microw. Wireless Compon. Lett., vol. 17, no. 1, pp. 40-42, January 2007.
S. Sun, L. Zhu, and H. H. Tan, “A compact wideband bandpass filter using transversal resonator and asymmetrical interdigital coupled lines,” IEEE Microw. Wireless Compon. Lett., vol. 18, no. 3, 2008.
J. S. Hong and M. J. Lancaster, “Microstrip filters for RF/microwave applications,” New York: Wiley, 200173-175, March 2008.
H. Shaman and J. S. Hong, “Ultra-wideband bandpass filter with embedded band notch strctures,” IEEE Microw. Wireless Compon. Lett., vol. 17, no. 3, pp. 193-195, March 2007.
H. Shaman and J. S. Hong, “Input and output crosscoupled wideband bandpass filter,” IEEE Trans. Microw. Theory Tech., vol. 55, no. 12, pp. 2562- 2568, December 2007.
P. Monda and M. K. Mandal, “Compact ultrawideband bandpass filter with improved upper stopband,” IEEE Microw. Wireless Compon. Lett., vol. 17, no. 9, pp. 643-645, 2007.
P. Mondal, A. Roy, and S. K. Parui, “Wide-band bandpass filter using CRLH transmission line and floating slot approach,” 2 nd Int. Conf. Computer, Communication, Control and Information Technology, vol. 4, pp. 466-471, 2012.
C. C. Chen, J. T. Kuo, M. Jiang, and A. Chin, “Study of parallel coupled-line microstrip filter in broadband,” Microw. Opt. Tech. Lett., vol. 48, no. 2, 373-375, February 2006.
R. Li and L. Zhu, “Compact UWB bandpass filter using stub-loaded multiple-mode resonator,” IEEE Microw. Wireless Compon. Lett., vol. 17, no. 1, 40- 42, January 2007.
A. A. Lotfi-Neyestanak and A. Lalbakhsh, “Improved microstrip hairpin-line bandpass filters for spurious response suppression,” IEE Electron. Lett., vol. 48, no. 14, July 2012.
A. Lalbakhsh, A. A. Lotfi-Neyestanak, and M. N. Moghaddasi, “Microstrip hairpin bandpass filter using modified minkowski fractal shape for suppression of second harmonic,” IEICE Trans. Electron., vol. E95-C, no. 3, pp. 378-381, 2012.
J. Park, J. P. Kim, and S. Nam, “Design of a novel harmonic-suppressed microstrip low-pass filter,” IEEE Microw. Wireless Compon. Lett., vol. 17, pp. 424-426, 2007.
M. H. AlSharkawy, D. Abd El-Aziz, and E. G. Mahmoud, “A miniaturized lowpass/bandpass filter using double arrow head defected ground structure with centered etched ellipse,” Progress In Electromagnetics Research Letters, vol. 24, pp. 99- 107, 2011.
