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An Optimal Design of the Compact CRLH-TL UWB Filter Using a Modified Evolution Strategy Algorithm
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 Title & Authors
An Optimal Design of the Compact CRLH-TL UWB Filter Using a Modified Evolution Strategy Algorithm
Oh, Seung-Hun; Wu, Chao; Chung, Tae Kyung; Kim, Hyeong-Seok;
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 Abstract
This paper deals with an efficient optimization design method of a compact ultra wideband (UWB) filter which can improve the characteristics of the filter. The Evolution Strategy (ES) algorithm is adopted for the optimization and modified to suppress the ripple by inserting an additional step to the ES scheme. The algorithm has the ability to control the ripple of an insertion loss in a passband as a modified approach. During the modified ES, a structure of initial shape is changed a lot, while includes the stepped impedance (SI) and the composite right/left handed transmission line (CRLH-TL). And an optimized filter satisfies the UWB specifications on the stopband and passband with an acceptable insertion loss. The filter achieves a much developed shape, the size of , the 3dB bandwidth from 2.7 to 10.8GHz, the flat insertion-loss less than 1dB, the wide stopband with 12~20GHz, and an acceptable return loss.
 Keywords
CRLH-TL;UWB Filter;SI;ES;Ripple;Step of suppressing the ripples;
 Language
English
 Cited by
 References
1.
H. Wang, L. Zhu and W. Menzel, “Ultra-Wideband Bandpass Filter with Hybrid Microstrip/CPW Structure,” IEEE Microwave And Wireless Component Letters, vol. 15, no. 12, pp. 844-846, December 2005. crossref(new window)

2.
C.-L. Hsu, F.-C. Hsu, and J.-T. Kuo, “Microstrip Bandpass Filters for Ultra-Wideband (UWB) Wireless Communications,” IEEE MTT-S Intl. Dig., pp. 675-678, June 2005.

3.
Christophe Caloz, Tatsuo Itoh, Electromagnetic Metamaterials: Transmission Line Theory and Microwave Applicaions, WILEY-INTERSCIENCE, John-Wiley & Sons Inc., Hobokin, NJ 2006.

4.
J. Ju, S. Kahng, “A compact UWB bandpass filter using a center-tapped composite right/left-handed transmission-line zeroth-order resonator” Microwave and Optical Technology Letters, vol. 53, Issue 9, pp. 1974-1976, Sep. 2011. crossref(new window)

5.
S. Kahng, et al., “A Center-Tapped CRLH ZOR UWB Bandpass Filter with Improved Stopband”, MICROWAVE JOURNAL, vol. 55, Issue 6, pp. 86~86, June. 2012.

6.
S. Kahng, et al., “Compact metamaterial zeroth-order resonator bandpass filter for a UHF band and its stopband improvement by transmission zeros”, IET-Microwaves, Antennas & Propagation, Vol. 5, Issue 10, pp. 1175~1181 , July. 2011.

7.
B. Lee, S. Kahng, “A compact UWB bandpass filter using a center-tapped composite right/left-handed transmission-line zeroth-order resonator” Microwave and Optical Technology Letters, vol. 53, Issue 9, pp. 1974-1976, Sep. 2011. crossref(new window)

8.
S. Kahng, et al., “Compact UWB Bandpass Filter as Cascaded Center-Tapped CRLH Transmission-Line ZORs for Improved Stopband”, Journal of Electronical Engineering & Technology, vol. 8, no. 2, pp. 371-375, Aug. 2015.

9.
David M. Pozar, Microwave Engineering 3rd Edition, John Wiley & Sons, Inc., Wiley publishing company 2005.

10.
K.-T. Kim, J.-H. Ko, K. Choi, H.-S. Kim, “Optimum Design of Wideband Bandpass Filter with CSRR-Loaded Transmission Line Using Evolution Strategy”, IEEE Trans. on Magnetics, Vol. 48, No. 2, pp. 811-814, Feb. 2012. crossref(new window)

11.
K. C. Gupta, R. Garg, I. Bahl, and P. Bhartia, Microstrip Lines and Slotlines, Artech House, Inc., Norwood, MA 1996.

12.
G. Matthaei, L. Young, and E. M. T. Jones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, Inc., 1980.

13.
T. Back, Evolutionary Algorithms in Theory and Practice. Oxford, U.K.: Oxford Univ. Press, 1996.

14.
HFSS, Version 13, Ansoft Corporation LLC, 225 West Station, Square Suite 200, Pittsburgh, PA 15219-1119, 2011.