Design of High Performance Miniaturized Lowpass Filter Using New Approach of Modeling
Keywords:
Circuit model, defected ground structure, taper loaded resonatorAbstract
In this paper a compact microstrip lowpass filter (LPF) is presented using the taper-loaded resonator. Based on a new approach, the resonator response as a function of its model component is obtained. The proposed equation between the insertion loss and LC parameters of the resonator, enable designers to calculate the proper amount of these parameters for a considered response, through the mathematical equations. The response of the final filter is improved using H-shape and spiral-shape defected ground structure. This filter is designed, fabricated and measured and as it is shown in the simulation results, the cutoff frequency is 1.53 GHz, the roll-off rate is better than 29.3 dB/GHz and the insertion loss is less than 0.1 dB from DC to 1.1 GHz.
Downloads
References
A. S. Al-Zayed, M. B. Asad Allah, and S. F. Mahmoud, “Lowpass filter design based on microstrip meander line with HDGS,” The Applied Computational Electromagnetics Society, vol. 29, no. 6, 2014.
G. Zhang, J. Wang, Y. Dou, and H. Cui, “Compact microstrip lowpass filter with ultra-wide stopband using stepped-impedance tyrapezoid resonators,” The Applied Computational Electromagnetics Society, vol. 29, no. 4, 2014.
Y. Dou, J. Wang, H. Cui, and J. L. Li, “Miniaturized microstrip lowpass filter with ultra-wide stopband,” The Applied Computational Electromagnetics Society, vol. 28, no. 7, 2013.
R.-Y. Yang, Y.-L. Lin, C.-Y. Hung, and C.-C. Lin, “Design of a compact and sharp rejection low-pass filter with a wide stopband,”Journal of Electromagnetic Waves and Applications, vol. 26 pp. 2284-2290, 2012.
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, pp. 328-332, 2013.
J. Chen, Z.-B. Weng, Y.-C. Jiao, and F.-S. Zhang, “Lowpass filter design of Hilbert curve ring defected ground structure,” Progress In Electromagnetics Research PIER, vol. 70, pp. 269-280, 2007.
H. Cao, W. Ying, H. Li, and S. Yang, “Compact lowpass filter with wide stopband using novel windmill resonator,” Journal of Electromagnetic Waves and Applications, vol. 26, pp. 2234-2241, 2012.
H. L. Cao, W. B. Ying, H. Li, and S. Z. Yang, “Compact lowpass filter with ultra-wide stopband rejection using meandered-slot dumbbell resonator,” Journal of Electromagnetic Waves and Applications, vol. 26, pp. 2203-2210, 2012.
M. H. Yang, J. Xu, Q. Zhao, L. Peng, and G. P. Li, “Compact, broad-stopband lowpass filters using SIRs-loaded circular hairpin resonator,” Progress In Electromagnetics Research PIER, vol. 102, pp. 95-106, 2010.
Q. He and C. Liu, “A novel low-pass filter with an embedded band-stop structure for improved stopband characteristics,” IEEE Microwave and Wireless Components Letters, vol. 19, pp. 629-631, 2009.
H. Taher, “Ultrawide stopband low-pass filter using triangular resonators defected ground,” Journal of Electromagnetic Waves and Applications, vol. 28, pp. 542-550, 2014.
M. Hayati, S. Majidifar, and O. S. Fathabadi, “Compact microstrip lowpass filter with wide stopband and high attenuation,” Microwave Journal, vol. 4, Apr. 2012.
M. H. Yang, J. Xu, Q. Zhao, and X. Sun, “Widestopband and miniarurized lowpass filters using SIRs-loaded hairpin resonators,” Electromagnetic Waves and Applications, vol. 28, pp. 542-550, 2014.
L. H. Weng, S. J. Shi, X. Q. Chen, Y. C. Guo, and X. W. Shi, “A novel CSRRs DGS as lowpass filter,” Journal of Electromagnetic Waves and Applications, vol. 22, pp. 1899-1906, 2008.
S-H. Fu, C-M. Tong, X-M. Li, W. Zhang, and K. Shen, “Compact miniaturized stepped impedance low-pass filter with sharp cut off characteristic,” Microwave and Optical Technology Letters, vol. 51, pp. 2257-2258, 2009.
L. Ge, J. P. Wang, and Y.-X. Gue, “Compact microstrip low-pass filter with ultra-wide stopband,” Electronics Letters, vol. 46, pp. 689-691, 2009.
H. Sariri, Z. Rahmani, A. Lalbakhsh, and S. Majidifar, “Compact LPF using T-shaped resonator,” Frequenz Journal, vol. 67, pp. 17-20, 2013
W. Che, Y. F Tang, J. Zhang, and Y. L. Chow, “Formulas of dielectric and total attenuations of a microstrip line,” Radio Science, vol. 45, 2010.
J. S Hong and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, 2001.
