volume | PIER Journals

Abstract

This paper aims to present a highly selective, compact size new ultra-wideband (UWB) bandpass filter with three sharp notches for UWB indoor applications. The fundamental geometry of the filter is based on modified multi-mode resonator (MMR) structure which comprises a open-ended step impedance resonator (SIR) attached to an interdigitated uniform impedance resonator (UIR). Realizing a Comb-shaped resonator structure below the UIR and symmetrically extending the lower arm edge of the interdigital coupled lines, three notches are generated at 6 GHz, 6.53 GHz, and 8.35 GHz. These notches have improved the UWB bandpass filter responses by suppressing the existing interferences in the UWB passband created by Wi-Fi 6E (6 GHz), super-extended C band (6.425 GHz~6.725 GHz), X band satellite communications for satellite TV networks or raw satellite feeds (7.25 GHz~8.395 GHz). Concurrently the notched band filter has achieved superiority in other salient features concerning passband and stop band of the filter such as a high passband fractional bandwidth (115.76%), low return loss (-13.27 dB), low insertion loss (0.44 dB~0.97 dB), wide upper stop band (5.37 GHz), nearly flat group delay (0.28 ns~0.45 ns) etc. The ultimate design of UWB bandpass filter is fabricated and verified by comparing the simulated filter responses with the measured results indicating a good agreement.

1. "Revision of Part 15 of the Commission's rules regarding ultra-wideband transmission system,", FCC, Washington, DC, Tech. Rep. ET-Docket 98-153, Apr. 2002. Google Scholar

2. Zhu, L., S. Sun, and W. Menzel, "Ultra-wideband (UWB) bandpass filters using multiple-mode resonator," IEEE Microw. Wireless Compon. Lett., Vol. 15, No. 11, 796-798, Nov. 2005. Google Scholar

3. Jiang, Y., W. Tang, Y. Shi, P. Zhou, and L. Feng, "Compact and low insertion loss UWB on-chip bandpass filter using coupled meanderedline," Microw. Opt. Technol. Lett., 1-7, 2020. Google Scholar

4. Zeng, J., X. Li, and Z. Qi, "UWB bandpass filter with compact size and wide upper stopband," Microw. Opt. Technol. Lett., 1-5, 2019. Google Scholar

5. Kuo, T. N., S. C. Lin, and C. H. Chen, "Compact ultra-wideband bandpass filter using composite microstrip-coplanar-waveguide structure," IEEE Trans. Microwave Theory Tech., Vol. 54, 3772-3778, Oct. 2006.
doi:10.1109/LMWC.2007.899314 Google Scholar

6. Shaman, H. and J.-S. Hong, "Asymmetric parallel-coupled lines for notch implementation in UWB filters," IEEE Microw. Wireless Compon. Lett., Vol. 17, No. 7, 516-518, Jul. 2007.
doi:10.1109/LMWC.2010.2053024 Google Scholar

7. Chu, Q. X. and X. K. Tian, "Design of UWB bandpass filter using stepped-impedance stub-loaded resonator," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 9, 501-503, Sep. 2010. Google Scholar

8. Chakraborty, P., P. P. Shome, A. Deb, A. Neogi, and J. R. Panda, "Compact configuration of open ended stub loaded multi-mode resonator based UWB bandpass filter with high selectivity," IEEE 8th International Conference on Signal Processing and Integrated Networks (SPIN), 2021.
doi:10.1109/MMM.2021.3078040 Google Scholar

9. Shome, P. P., T. Khan, S. K. Koul, and Y. M. M. Antar, "Two decades of UWB filter technology: From elementary designs-to-recent developments," IEEE Microwave Magazine, Vol. 22, No. 8, 1-20, Aug. 2021. Google Scholar

10. Shome, P. P. and T. Khan, "A compact design of circular-ring shaped MMR based bandpass filter for UWB applications," Proc. of the 2019 IEEE Asia-Pacific Microwave Conference (APMC), Singapore, Dec. 2019.
doi:10.1109/TMTT.2006.882883 Google Scholar

11. Gomez-Garcia and J. I. Alonso, "Systematic method for the exact synthesis of ultra-wideband filtering responses using high-pass and low-pass sections," IEEE Trans. Microwave Theory Tech., Vol. 54, No. 10, 3751-3764, Oct. 2006.
doi:10.1109/LMWC.2013.2296291 Google Scholar

12. Song, Y., G. M. Yang, and W. Geyi, "Compact UWB bandpass filter with dual notched bands using defected ground structures," IEEE Microw. Wireless Compon. Lett., Vol. 24, No. 4, 230-232, Apr. 2014.
doi:10.1016/j.aeue.2016.11.004 Google Scholar

13. Sarkar, D., T. Moyra, and L. Murmu, "An ultra-wideband (UWB) bandpass filter with complementary split ring resonator for coupling improvement," International Journal of Electronics and Communication (AEU), Vol. 71, 89-95, 2017. Google Scholar

14. Abbosh, A. M., "Planar bandpass filters for ultra-wideband applications," IEEE Trans. Microwave Theory Tech., Vol. 55, 2262-2269, Oct. 2007.
doi:10.1109/LMWC.2011.2128302 Google Scholar

15. Ghatak, R., P. Sarkar, R. K. Mishra, and D. R. Poddar, "A compact UWB bandpass filter with embedded SIR as band notch structure," IEEE Microw. Wireless Compon. Lett., Vol. 21, No. 5, 261-263, May 2011. Google Scholar

16. Janapala, D. K. and M. Nesasudha, "A compact ultra wide band bandpass filter with dual band notch designed based on composite right/left-handed transmission line unit cell," Int. J. RF Microw. Comput. Aided Eng., 2018.
doi:10.1002/mop.24093 Google Scholar

17. Hsiao, P. Y. and R. M. Weng, "A compact ultra-wideband bandpass filter with WLAN notch band," Microw. Opt. Technol. Lett., Vol. 51, No. 2, 503-507, Feb. 2009. Google Scholar

18. Kumari, P., P. Sarkar, and R. Ghatak, "A multi-stub loaded compact UWB BPF with a broad notch band and extended stopband characteristics," Int. J. RF Microw. Comput. Aided Eng., 2020. Google Scholar

19. Ghazali, A. N., M. Sazid, and S. Pal, "A miniaturized low-cost microstrip-to-coplanar waveguide transition-based ultra-wideband bandpass filter with multiple transmission zeros," Microw. Opt. Technol. Lett., 1-6, 2020. Google Scholar

20. Ghazali, A. N., M. Sazid, and S. Pal, "Multiple passband transmission zeros embedded compact UWB filter based on microstrip/CPW transition," International Journal of Electronics and Communication (AEU), Vol. 129, 1-6, 2021.
doi:10.1049/joe.2018.5071 Google Scholar

21. Sangam, R. S. and R. S. Kshetrimayum, "Notched UWB filter using exponential tapered impedance line stub loaded microstrip resonator," J. Eng., Vol. 2018, No. 9, 768-772, 2018. Google Scholar

22. Wang, C., X. Xi, Y. Zhao, and X. Shi, "Compact tri-notched wideband bandpass filter based on multiple resonances with wide upper stopband," Microw. Opt. Technol. Lett., 1-6, 2020. Google Scholar

23. Makimoto, M. and S. Yamashita, Microwave Resonators and Filters for Wireless Communication Theory, Design and Application, Vol. 4, Springer Series in Advanced Microelectronics, 2001.
doi:10.1002/9781118197981

24. Zhu, L., S. Sun, and R. Li, Microwave Bandpass Filters for Wideband Communications, John Wiley & Sons, Inc., 2012.

25. Ansoft Corporation Ansoft HFSS (Version 11), 2007.
doi:10.2528/PIERM20042602

26. Basit, A., M. I. Khattak, and M. Alhasan, "Design and analysis of a microstrip planar UWB bandpass filter with triple notch bands for WiMAX, WLAN, and X-band satellite communication systems," Progress In Electromagnetics Research M, Vol. 93, 155-164, 2020.
doi:10.2528/PIERL19090505 Google Scholar

27. Liu, F. and M. Qun, "A new compact UWB bandpass filter with quad notched characteristics," Progress In Electromagnetics Research Letters, Vol. 88, 83-88, 2020.
doi:10.3390/electronics8111316 Google Scholar

28. Weng, M. H., C. W. Hsu, S. W. Lan, and R. Y. Yang, "An ultra-wideband bandpass filter with a notch band and wide upper bandstop performances," Electronics, Vol. 8, 1316, 2019. Google Scholar

29. Sazid, M. and N. S. Raghava, "Planar UWB-bandpass filter with multiple passband transmission zeros," International Journal of Electronics and Communication (AEU), Vol. 134, 1-7, 2021. Google Scholar

Dr. Piali Chakraborty

Dr. Partha Pratim Shome

Dr. Jyoti Ranjan Panda

Dr. Arindam Deb