A Highly Compact Sext-band Bandpass Filter with Simple Structure and Wide Bandwidth
DOI:
https://doi.org/10.13052/2022.ACES.J.371009Keywords:
bandpass filter, open stubs, quad-section stepped impedance resonator(SIR), sext-bandAbstract
A highly compact sext-band bandpass filter (BPF) is investigated in this paper, which adopts quad-section stepped impedance resonators (SIRs) along with a series of multiple open stubs. This quad-section SIRs are constructed by tri-section SIR loaded L-shaped resonator. To achieve compact size, the filter utilizes tri-section SIR and is embedded in the double L-shaped resonators. Aseries of multiple open stubs are introduced to improve fractional bandwidth and the return loss. A sext-band BPF centering at 1.12, 2,12, 2,78, 5,59, 6.59 and 8.97 GHz has been designed and fabricated. This highly compact sext-band with wide bandwidth and simple structure is constructed on Rogers 4350 with a dielectric constant of 3.66 and a height of 0.508mm. The overall size of the fabricated filter is 0.15λ g × 0.16λ g . Good agreements are observed between the simulated and measured results.
Downloads
References
Y. Zhang, L. Gao, and X. Y. Zhang, “Compact quad-band bandpass filter for DCS/WLAN/WiMAX/5G Wi-Fi application,” IEEE Microwave Wireless Component Letter, vol. 25, no. 10, pp. 645-647, Aug. 2015
Y. Wu, L. Cui, Z. Zheng, W. Wang, and Y. Liu, “A simple planar dual-band bandpass filter with multiple transmission Poles and zeros,” Circuits and Systems II: Express Briefs, vol. 65, no. 1, pp. 56-60, Jan. 2018.
R. Gomez-Garcia, R. Loeches-Sanchez, D. Psychogiou, and D. Peroulis, “Multi-stub-loaded differential-mode planar multiband bandpass filters,” Circuits and Systems II: Express Briefs, vol. 65, no. 3, pp. 271-275, Mar. 2018.
Q. Yang, Y.-C. Jiao, and Z. Zhang, “Compact multiband bandpass filter using low-pass filter combined with open stub-loaded shorted stub,” IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 4, pp. 1926-1938, Apr. 2018.
M.-H. Weng, C.-W. Hsu, Y. Lin, C.-Y. Tsai, and R.-Y. Yang, “A simple method to design a tri-bandpass filter using open-loop uniform impedance resonators,” Journal of Electromagnetic Waves and Applications, vol. 34, no. 1, pp. 103-115, Nov. 2019.
C.-F. Chen, “Design of a compact microstrip quint-band filter based on the tri-mode stub-loaded stepped-impedance resonators,” IEEE Microwave and Wireless Components Letters , vol. 22, no. 7, pp. 357-359, Jul. 2012.
K.-W. Hsu, J.-H. Lin, and W.-H. Tu, “Compact sext-band bandpass filter with sharp rejection response,” IEEE Microwave and Wireless Components Letters, vol. 24, no. 9, pp. 593-595, Sep. 2014.
C.-F. Chen, S.-F. Chang, and B.-H. Tseng, “Design of compact microstrip sept-band bandpass filter with flexible passband allocation,” IEEE Microwave and Wireless Components Letters, vol. 24, no. 9, pp. 346-348, May 2016.
D. Bukuru, K. Song, F. Zhang, Y. Zhu, and M. Fan, “Compact quad-band bandpass filter using quad-mode stepped impedance resonator and multiple coupling circuits,” IEEE Transactions on Microwave Theory and Techniques, vol. 65, no. 3, pp. 783-791, Mar. 2017.
X. Li, Y. Zhang, X. Zhang, L. Qu, and Y. Fan, “Compact quint-band Bandpass Filter design in a rigorous manner utilizing multimode stub-loaded taper,” Microwave and Optical Technology Letters, vol. 60, no. 5, pp. 1230-1234, May 2018.
B.-H. Zhu, Z. Wang, E. Kim, and N. Kim, “A quad-band bandpass filter using sept-mode double square-ring loaded resonator,” Microwave and Optical Technology Letters, vol. 62, no. 5, pp. 1906-1913, May 2020.
F. Wei, P.-Y. Qin, Y. Jay Guo, and X.-W. Shi, “Design of multi-band bandpass filters based on stub loaded stepped-impedance resonator with defected microstrip structure,” IET Microwaves, Antennas and Propagation, vol. 10, no. 2, pp. 230-236, Jan. 2016.
X. Kai-Da and Z. Fengyu, “High selectivity bandpass filter using three pairs of coupled lines loaded with shorted stubs,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 34, no. 10, pp.469-474, 2019.
I. A. Yasir, Y. Tu, O.-P. Naser, I. T. E. Elfergani, A.-A. Raed, R. Jonathan, and J. M. Noras, “Mixed-coupling multi-function quint-wideband asymmetric stepped impedance resonator filter,” Microwave and Optical Technology Letters, vol. 61, no. 5, pp. 1181-1184, May 2019.
D. K. Choudhary and R. K. Chaudhary, “Miniaturized quad-band filter with improved selectivity using split ring resonators and metallic strips,” International Journal of RF and Microwave Computer-Aided Engineering, vol. 31, no. 10, pp. 1-9, Oct. 2021.
X. Li, Y. Zhang, Y. Tang, J. Xu, and Y. Fan, “Sext‐band bandpass filter with compactness based on cascading stage of SIRs,” Microwave and Optical Technology Letters, vol. 60, no. 2, pp. 306-310, Feb. 2018.
X. Li, Y. Zhang, Y. Tian, Y. Yang, and Y. Fan, “Quad-and sext-band bandpass filter based on multimode resonator utilizing SIRs-loaded tapered-line,” Microwave and Optical Technology Letters, vol. 60, no. 2, pp. 650-654, Feb. 2018.
X. Bi, L. Wang, Q. Ma, B. Hu and Q. Xu, “A compact sept-band bandpass filter utilising a single multi-mode resonator” IET Microwaves, Antennas and Propagation, vol. 13, no. 12, pp. 2013-2019, 2019.
Q. Yang, S. Liu, K.-D. Xu, and A. Zhang,“Compact octa-band bandpass filter based on controllable transmission zeros with wide upper stopband,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 36, no. 9, pp. 1159-1163, Sep. 2021.
J. Wang, S. He, F. You, W. Shi, J. Peng, and C. Li, “Codesign of high-efficiency power amplifier and ring-resonator filter based on a series of continuous modes and even–odd-mode analysis,” IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 6, pp.2867-1878, Jun. 2018.
J. Chen, J.-Z. Chen, B. Wu, Y. L. Zhang, and C.-H. Liang, “Design of triple-band microstrip filter with transmission zeros using open stubs,” Journal of Electromagnetic Waves and Applications, vol. 26, no. 4, pp. 525-534, Apr. 2012.
