Search search
Publication Date
to
Vol. 60
Latest Volume
All Volumes
PIERM 139 PIERM 138 PIERM 137 PIERM 136 PIERM 135 PIERM 134 PIERM 133 PIERM 132 PIERM 131 PIERM 130 PIERM 129 PIERM 128 PIERM 127 PIERM 126 PIERM 125 PIERM 124 PIERM 123 PIERM 122 PIERM 121 PIERM 120 PIERM 119 PIERM 118 PIERM 117 PIERM 116 PIERM 115 PIERM 114 PIERM 113 PIERM 112 PIERM 111 PIERM 110 PIERM 109 PIERM 108 PIERM 107 PIERM 106 PIERM 105 PIERM 104 PIERM 103 PIERM 102 PIERM 101 PIERM 100 PIERM 99 PIERM 98 PIERM 97 PIERM 96 PIERM 95 PIERM 94 PIERM 93 PIERM 92 PIERM 91 PIERM 90 PIERM 89 PIERM 88 PIERM 87 PIERM 86 PIERM 85 PIERM 84 PIERM 83 PIERM 82 PIERM 81 PIERM 80 PIERM 79 PIERM 78 PIERM 77 PIERM 76 PIERM 75 PIERM 74 PIERM 73 PIERM 72 PIERM 71 PIERM 70 PIERM 69 PIERM 68 PIERM 67 PIERM 66 PIERM 65 PIERM 64 PIERM 63 PIERM 62 PIERM 61 PIERM 60 PIERM 59 PIERM 58 PIERM 57 PIERM 56 PIERM 55 PIERM 54 PIERM 53 PIERM 52 PIERM 51 PIERM 50 PIERM 49 PIERM 48 PIERM 47 PIERM 46 PIERM 45 PIERM 44 PIERM 43 PIERM 42 PIERM 41 PIERM 40 PIERM 39 PIERM 38 PIERM 37 PIERM 36 PIERM 35 PIERM 34 PIERM 33 PIERM 32 PIERM 31 PIERM 30 PIERM 29 PIERM 28 PIERM 27 PIERM 26 PIERM 25 PIERM 24 PIERM 23 PIERM 22 PIERM 21 PIERM 20 PIERM 19 PIERM 18 PIERM 17 PIERM 16 PIERM 14 PIERM 13 PIERM 12 PIERM 11 PIERM 10 PIERM 9 PIERM 8 PIERM 7 PIERM 6 PIERM 5 PIERM 4 PIERM 3 PIERM 2 PIERM 1
All Journals
PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2017-10-04
Compact Microstrip Lowpass Filter with High and Wide Rejection in the Stopband Utilizing Flabelliform Resonators
By
Ashkan Abdipour,

    Dr. Ashkan Abdipour

    Young Researchers and Elite Club, Kermanshah Branch

    Islamic Azad University

    Iran

    Homepage

Arash Abdipour

    Dr. Arash Abdipour

    Young Researchers and Elite Club, Kermanshah Branch

    Islamic Azad University

    Iran

    Homepage

Progress In Electromagnetics Research M, Vol. 60, 179-188, 2017
doi:10.2528/PIERM17072803 | Google Scholar

Abstract
In this paper, a microstrip lowpass filter with -3 dB cutoff frequency of 3.8 GHz consisting of two cascaded resonators with flabelliform patches and two symmetric suppressing cells is proposed. To design the filter, the impact of each transmission line on the frequency response is determined by extracting the equations of the insertion loss (S21) and return loss (S11) on the basis of the equivalent LC circuit of the main resonance cell and the cascaded structure. The designed filter is constructed and tested, and a good agreement between the results of simulation and measurement is obtained. In the whole stopband region, a return loss close to zero and an acceptable suppression level of -30 dB from 4.47 to 25.17 GHz are achieved. Furthermore, a flat insertion loss in the passband and a low return loss (-23.02 dB) in the stopband can prove desired in-band and out-band frequency response.
Download Full Article (752) View Full Article volume
Citation
Ashkan Abdipour, and Arash Abdipour, "Compact Microstrip Lowpass Filter with High and Wide Rejection in the Stopband Utilizing Flabelliform Resonators," Progress In Electromagnetics Research M, Vol. 60, 179-188, 2017.
doi:10.2528/PIERM17072803
References

1. Wang, J., L. J. Xu, S. Zhao, Y. X. Guo, and W. Wu, "Compact quasi-elliptic microstrip lowpass filter with wide stopband," IEE Electron. Lett., Vol. 46, No. 20, 1384-1385, 2010.
doi:10.1049/el.2010.1569        Google Scholar

2. Luo, S., L. Zhu, and S. Sun, "Stopband-expanded low-pass filters using microstrip coupled-line hairpin units," IEEE Microw. Wireless Compon. Lett., Vol. 18, No. 8, 506-508, Aug. 2008.
doi:10.1109/LMWC.2008.2001004        Google Scholar

3. Wei, X. B., P. Wang, M. Q. Liu, and Y. Shi, "Compact wide-stopband lowpass filter using stepped impedance hairpin resonator with radial stubs," IEE Electron. Lett., Vol. 47, No. 15, 862-863, Jul. 2011.
doi:10.1049/el.2011.1414        Google Scholar

4. Li, L., Z. F. Li, and J. F. Mao, "Compact lowpass filters with sharpand expanded stopband using stepped impedance hairpin units," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 6, 31-312, Jul. 2010.        Google Scholar

5. Velidi, V. K. and S. Sanyal, "Sharp roll-off lowpass filter with wide stopband using stub-loaded coupled-line hairpin unit," IEEE Microw. Wireless Compon. Lett., Vol. 21, No. 6, 301-303, Jun. 2011.
doi:10.1109/LMWC.2011.2132120        Google Scholar

6. Mandal, M. K., P. Mondal, S. Sanyal, and A. Chakrabarty, "Low insertion-loss, sharp-rejection and compact microstrip low-pass filters," IEEE Microw. Wirel. Compon. Lett., Vol. 16, No. 11, 600-602, 2006.
doi:10.1109/LMWC.2006.884777        Google Scholar

7. Gomez-Garcia, R., M. A. Sanchez-Soriano, M. Sanchez Renedo, G. Torregrosa-Penalva, and E. Bronchalo, "Extended-stopband microstrip lowpass filter using rat-race directional coupler," Electron. Lett., Vol. 49, No. 4, 272-274, 2013.
doi:10.1049/el.2012.4245        Google Scholar

8. Li, J. L., S. W. Qu, and Q. Xue, "Compact microstrip lowpass filter with sharp roll-off and wide stop-band," IEE Electron. Lett., Vol. 45, No. 2, 110-111, Jun. 2009.
doi:10.1049/el:20093246        Google Scholar

9. Wang, J., H. Cui, and G. Zhang, "Design of compact microstrip lowpass filter with ultra-wide stopband," IEE Electron. Lett., Vol. 48, No. 14, 854-856, Jul. 2012.
doi:10.1049/el.2012.1362        Google Scholar

10. Abdipour, A., Ar. Abdipour, and S. Lotfi, "A lowpass filter with sharp roll-off and high relative stopband bandwidth using asymmetric high-low impedance patches," Radioengineering, Vol. 24, No. 3, 712-716, 2015.
doi:10.13164/re.2015.0712        Google Scholar

11. Wei, F., L. Chen, X.-W. Shi, Q.-L. Huang, and X.-H. Wang, "Compact lowpass filter with wide stop-band using coupled-line hairpin unit," Electron. Lett., Vol. 46, No. 1, 88-90, 2010.
doi:10.1049/el.2010.2411        Google Scholar

12. Ma, K. and K. S. Yeo, "New ultra-wide stopband low-pass filter using transformed radial stubs," IEEE Trans. Microw. Theory. Tech., Vol. 59, No. 3, 604-611, Mar. 2011.
doi:10.1109/TMTT.2010.2095031        Google Scholar

13. Nouritabar, A. R., A. Abdipour, and Ar. Abdipour, "A design of low-pass filter with wide stopband and sharp roll-off rate using series LC tanks resonator," Applied Computational Electromagnetics Society (ACES) Journal, Vol. 31, No. 11, 1343-1350, 2016.        Google Scholar

14. Abdipour, Ar. and A. Abdipour, "Compact microstrip lowpass filter with an ultra-wide stopband and sharp transition band using T-shaped and polygon resonators," Progress In Electromagnetics Research C, Vol. 74, 51-61, 2017.
doi:10.2528/PIERC16121904        Google Scholar

15. Abdipour, A., Ar. Abdipour, and F. Lorestani, "A compact microstrip lowpass filter with sharp roll-off rate and ultra-wide stopband employing coupled polygon patches," Progress In Electromagnetics Research C, Vol. 76, 171-183, Aug. 2017.
doi:10.2528/PIERC17043003        Google Scholar

16. Hong, J.-S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, Inc., 2001.
doi:10.1002/0471221619

Download Full Article (752) View Full Article volume


The EM Academy piers.org jpier.org Who's Who in EM
Copyright © 2022 The Electromagnetics Academy. All Rights Reserved.