Journal of electromagnetic engineering and science

  • 제18권2호
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  • Pages.73-77
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  • 2018
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  • 2671-7255(pISSN)
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  • 2671-7263(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
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Compact Dual-Band Bandpass Filter Using U-Shaped Stepped-Impedance Resonators with Parallel Coupled Structures

  • Sung, Gyuje (Department of Electrical and Electronic Engineering and IITC, Hankyong National University)
  • 투고 : 2017.09.08
  • 심사 : 2018.01.05
  • 발행 : 2018.04.30
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초록

This paper proposes a dual-band bandpass filter using stepped-impedance resonators (SIRs) with parallel coupled structures. The proposed filter adopts U-shaped SIRs with parallel coupled lines (PCLs) that have interdigital and comb-line shorted ends. The central PCLs build an upper passband and a transmission zero, and the two U-shaped SIRs build a lower passband. Four resonators and coupling structures are theoretically analyzed to derive its scattering parameters. A novel dual-band bandpass filter is designed and fabricated using the induced scattering characteristics. The measured results show that the fabricated dual-band bandpass filter has an insertion loss of less than 1.02 dB in the lower band of 2.45 GHz and of 3.01 dB in the upper band of 3.42 GHz, and a band-to-band isolation of more than 40 dB, from 3.14 to 3.2 GHz.

키워드

참고문헌

  1. H. Liu, B. Ren, X. Guan, J. Lei, and S. Li, "Compact dual-band bandpass filter using quadruple-mode square ring loaded resonator (SRLR)," IEEE Microwave and Wireless Components Letters, vol. 23, no. 4, pp. 181-183, 2013. https://doi.org/10.1109/LMWC.2013.2247749
  2. S. J. Sun, T. Su, K. Deng, B. Wu, and C. H. Liang, "Compact microstrip dual-band bandpass filter using a novel stub-loaded quad-mode resonator," IEEE Microwave and Wireless Components Letters, vol. 23, no. 9, pp. 465-467, 2013. https://doi.org/10.1109/LMWC.2013.2274038
  3. J. Xu, W. Wu, and C. Miao, "Compact microstrip dual-/tri-/quad-band bandpass filter using open stubs loaded shorted stepped-impedance resonator," IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 9, pp. 3187-3199, 2013. https://doi.org/10.1109/TMTT.2013.2273759
  4. L. Gao, X. Y. Zhang, B. J. Hu, and Q. Xue, "Novel multi-stub loaded resonators and their applications to various bandpass filters," IEEE Transactions on Microwave Theory and Techniques, vol. 62, no. 5, pp. 1162-1172, 2014. https://doi.org/10.1109/TMTT.2014.2314680
  5. F. Wei, Y. J. Guo, P. Y. Qin, and X. W. Shi, "Compact balanced dual- and tri-band bandpass filters based on stub loaded resonators," IEEE Microwave and Wireless Components Letters, vol. 25, no. 2, pp. 76-78, 2015. https://doi.org/10.1109/LMWC.2014.2370233
  6. L. Gao and X. Y. Zhang, "High-selectivity dual-band bandpass filter using a quad-mode resonator with source-load coupling," IEEE Microwave and Wireless Components Letters, vol. 25, no. 9, pp. 474-476, 2015.
  7. J. Xu, W. Wu, and C. Miao, "Compact and sharp skirts microstrip dual-mode dual-band bandpass filter using a single quadruple-mode resonator (QMR)," IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 3, pp. 1104-1113, 2013. https://doi.org/10.1109/TMTT.2013.2238949
  8. Y. H. Cho, X. G, Wang, and S. W. Yun, "Design of dual-band interdigital bandpass filters using both series and shunt resonators," IEEE Microwave and Wireless Components Letters, vol. 22, no. 3, pp. 111-113, 2013. https://doi.org/10.1109/LMWC.2012.2185839
  9. Y. H. Cho and S. W. Yun, "Design of balanced dual-band bandpass filters using asymmetrical coupled lines," IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 8, pp. 2814-2820, 2013. https://doi.org/10.1109/TMTT.2013.2269051
  10. Y. Mo, K. Song, and Y. Fan, "Miniaturized triple-band bandpass filter using coupled lines and grounded stepped impedance resonators," IEEE Microwave and Wireless Components Letters, vol. 24, no. 5, pp. 333-335, 2014. https://doi.org/10.1109/LMWC.2014.2310458
  11. S. Lv, Y. Ge, and W. Zhang, "Compact high-selectivity dual/tri-band bandpass filters for WLAN applications," Progress In Electromagnetics Research C, vol. 61, pp. 131-138, 2016.
  12. E. Ogbodo, Y. Wang, and K. S. Yeo, "Microstrip dual-band bandpass filter using U-shaped resonators," Progress In Electromagnetics Research Letters, vol. 59, pp. 1-6, 2016. https://doi.org/10.2528/PIERL15072303
  13. J. Wang and P. Gao, "Dual-band bandpass filter using composite coupling structure for CPW/microstrip," Progress In Electromagnetics Research Letters, vol. 58, pp. 53-57, 2016. https://doi.org/10.2528/PIERL15111901
  14. H. Y. Gao, Z. X. Tang, X. Cao, and Y. Q. Wu, "Compact dual‐band SIW filter with CSRRS and complementary spiral resonators," Microwave and Optical Technology Letters, vol. 58, no. 1, pp. 1-4, 2016. https://doi.org/10.1002/mop.29482
  15. G. J. Sung, D. H. Ye, and B. Kim, "Equivalent circuit design of multilayer parallel-coupled line filter," in Proceedings of IEEE Radio and Wireless Conference, Atlanta, GA, 2004, pp. 239-241.

피인용 문헌

  1. Simple quad‐band bandpass filter implemented on a 50‐Ω microstrip line vol.62, pp.1, 2018, https://doi.org/10.1002/mop.32016