Vol. 91

Front:[PDF file] Back:[PDF file]
Latest Volume
All Volumes
All Issues
2019-03-20

Electronically Switchable Ultra-Wide Band /Dual-Band Bandpass Filter Using Defected Ground Structures

By Eman Gamal Ouf, Esmat A. Abdallah, Ashraf Shawky Mohra, and Hadia El-Hennawy
Progress In Electromagnetics Research C, Vol. 91, 83-96, 2019
doi:10.2528/PIERC19010702

Abstract

In this paper, an electronically switchable ultra-wideband (UWB)/dual-band bandpass filter using defected ground structures (DGSs) is proposed. The proposed filter consists of meandered inter-digital coupled line sections, stepped impedance open stubs, coupled lines, and rectangular DGSs to realize high performance in the operation band with a compact size of 12.5 mm × 10 mm. The proposed filter is designed on an RT/Teflon substrate (εr = 2.2, h = 0.7874 mm). The main advantage of the proposed filter is the reconfiguration of ultra-wide bandpass filter to dual-band bandpass filter. UWB has passband from 3.6 GHz to 10.6 GHz with upper wide stopband attenuation better than 20 dB up to 18 GHz. The dual passbands extend from 3.8 GHz to 5 GHz and from 9.5 GHz to 10.8 GHz. This filter is able to provide interference immunity from unwanted radio signals, such as wireless local area networks (WLAN), worldwide interoperability for microwave access (WIMAX) that cohabit within the UWB spectrum, and X (Military) band of satellite from 7 GHz to 8 GHz. The state of filter can be changed by using switching matrix equipment (mini circuit, replacement of PIN diodes). To validate the design theory, an electronically switchable UWB/dual-band bandpass filter using DGSs is designed, fabricated, and measured. Good agreement is found between simulated and measured results.

Citation


Eman Gamal Ouf, Esmat A. Abdallah, Ashraf Shawky Mohra, and Hadia El-Hennawy, "Electronically Switchable Ultra-Wide Band /Dual-Band Bandpass Filter Using Defected Ground Structures," Progress In Electromagnetics Research C, Vol. 91, 83-96, 2019.
doi:10.2528/PIERC19010702
http://www.jpier.org/PIERC/pier.php?paper=19010702

References


    1. Federal Communications Commission (FCC), Revision of Part 15 of the Commissions Rules Regarding, "Ultra-wideband transmission systems,", First Report and order, FCC 2–48, Apr. 22, 2002.
    doi:10.1109/TMTT.2005.845765

    2. Kuo, J.-T., T.-H. Yeh, and C.-C. Yeh, "Design of microstrip bandpass filters with a dual-passband response," IEEE Trans. Microw. Theory Tech., Vol. 53, No. 4, 1331-1336, Apr. 2005.
    doi:10.1109/LMWC.2006.890463

    3. Weng, M.-H., H.-W. Wu, and Y.-K. Su, "Compact and low loss dual-band bandpass filter using pseudo-interdigital stepped impedance resonators for WLANs," IEEE Microwave Wireless Component Letters, Vol. 17, No. 3, 187-189, Mar. 2007.
    doi:10.1109/TMTT.2004.825680

    4. Tsai, L.-C. and C.-W. Huse, "Dual-band bandpass filters using equal length coupled-serial-shunted lines and Z-transform techniques," IEEE Trans. Microw. Theory Tech., Vol. 52, No. 4, 1111-1117, Apr. 2004.
    doi:10.1109/LMWC.2006.869868

    5. Guan, X., Z. Ma, P. Cai, Y. Kobayashi, T. Anada, and G. Hagiwara, "Synthesis of dual-band bandpass filters using successive frequency transformations and circuit conversions," IEEE Microw. Wireless Compon. Lett., Vol. 16, No. 3, 110-112, Mar. 2006.
    doi:10.1109/TMTT.2007.895410

    6. Lee, H.-M. and C.-M. Tsai, "Dual-band filter design with flexible passband frequency and bandwidth selections," IEEE Trans. Microw. Theory Tech., Vol. 55, No. 5, 1002-1009, May 2007.
    doi:10.1109/22.899965

    7. Ahn, D., J.-S. Park, C.-S. Kim, J. Kim, Y. Qian, and T. Itoh, "A design of the low-pass filter using the novel microstrip defected ground structure," IEEE Trans. Microw. Theory Tech., Vol. 49, No. 1, 86-93, Jan. 2001.

    8. Shan, Q., C. Chen, and W. Wu, "Design of an UWB bandpass filter with a notched band using asymmetric loading stubs," IEEE International Conference on Microwave and Millimeter Wave Technology (ICMMT), Beijing, China, Jun. 5–8, 2016.

    9. Pozar, D. M., Microwave Engineering, 4th Edition, John Wiley and Sons, Inc., 2012.
    doi:10.1002/9780470937297

    10. Hong, J. S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, Inc., 2011.
    doi:10.2528/PIERB08031401

    11. Weng, L. H., Y.-C. Guo, X.-W. Shi, and X.-Q. Chen, "An overview on defected ground structure," Progress In Electromagnetics Research B, Vol. 7, 173-189, 2008.

    12. Bahl, I., Lumped Elements for RF and Microwave Circuits, Artech House, Norwood, USA, 2003.
    doi:10.1109/LMWC.2007.897788

    13. Wong, S. W. and L. Zhu, "EBG-embedded multiple-mode resonator for UWB bandpass filter with improved upper stop band performance," IEEE Microwave Wireless Component Letters, Vol. 17, No. 6, 421-423, 2007.
    doi:10.5815/ijwmt.2018.03.06

    14. Senguptaa, A., S. R. Choudhuryb, and S. Dasc, "Design of an UWB bandpass filter using dualMMR with highly attenuated upper stopband using DGS," I. J. Wireless and Microwave Technologies, Vol. 3, 58-69, 2018.

    15. Zheng, X., Y. Pan, and T. Jiang, "UWB bandpass filter with dual notched bands using T-shaped resonator and L-shaped defected microstrip structure," Micromachines, Vol. 280, No. 9, 1-12, 2018.

    16., , USB RF-SPDT Switch Matrix, Mini Circuits, https://www.minicircuits.com/pdfs/USB-4SPDTA18. pdf.