[1] Zhu Yizhi, Zhang Xiaojuan, Fang Guangyou, et al. Novel S-slot DGS with high quality factor [J]. Journal of Southeast University (English Edition), 2009, 25 (4): 431-434. [doi:10.3969/j.issn.1003-7985.2009.04.003]

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Novel S-slot DGS with high quality factor()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

25

Issue:

2009 4

Page:

431-434

Research Field:

Electronic Science and Engineering

Publishing date:

2009-12-30

Info

Title:

Novel S-slot DGS with high quality factor

Author(s):

Zhu Yizhi¹;  2;  Zhang Xiaojuan¹;  Fang Guangyou¹

¹Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
² Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:

S-slot;  defected ground structure(DGS);  quality factor

PACS:

TN713;TN455

DOI:

10.3969/j.issn.1003-7985.2009.04.003

Abstract:

In order to solve the problem that the quality factor(Q factor)of the conventional defected ground structure(DGS)is not high and cannot produce a sharp resonant band, a novel S-slot DGS is presented. Compared with the conventional DGS, the proposed S-slot DGS has a much higher Q factor, a quite simpler layout and a steeper band rejection. Its equivalent circuit model is extracted by analyzing the transfer characteristics, and design parameters are calculated according to the deducted equations. Characteristics of this type of DGS are investigated with variable dimension parameters and an experiential method for the design of the S-slot DGS is summarized. Finally, a sample of a compact S-slot DGS unit resonated at 4.64 GHz is fabricated. Its Q factor is as high as 39.66 and its size is only 5.00 mm×1.40 mm, with a steep resonant band and a low insertion-loss passband. The measured results show a good agreement with simulation, which demonstrates the applicability of the S-slot DGS in practical engineering.

References:

[1] Park J I, Kim C S, Kim J, et al. Modeling of a photonic bandgap and its application for the low-pass filter design [C]//Proceedings of Asia-Pacific Microwave Conference’99. Singapore, 1999: 331-334.
[2] Kim H-M, Lee B. Bandgap and slow/fast-wave characteristics of defected ground structures(DGSs)including left-handed features [J]. IEEE Transactions on Microwave Theory and Techniques, 2006, 54(7): 3113-3120.
[3] Ahn D, Park J-S, Kim C-S, et al. A design of the low-pass filter using the novel microstrip defected ground structure [J]. IEEE Transactions on Microwave Theory and Techniques, 2001, 49(1): 86-93.
[4] Woo D-J, Lee T-K. Suppression of harmonies in Wilkinson power divider by using asymmetric spiral DGS [C]//Proceedings of the 34th European Microwave Conference. Amsterdam, 2004: 467-470.
[5] Lim J-S, Jeong Y-C, Ahn D, et al. Size-reduction and harmonic-rejection of microwave amplifiers using spiral-defected ground structure [C]//Proceedings of the 33rd European Microwave Conference. Munich, 2003: 1421-1424.
[6] Boutejdar A, Elsherbini A, Omar A. A new cross-head defected ground structure(CDGS)for a compact low-pass filter with a wide stop-band [C]//Proceedings of the 37th European Microwave Conference. Munich, 2007: 842-845.
[7] Chen H J, Huang T H, Chang C S, et al. A novel cross-shape DGS applied to design ultra-wide stopband low-pass filters [J]. IEEE Microwave Wireless Compon Letters, 2006, 16(5): 252-254.
[8] Woo D-J, Lee T-K, Pyo C-S, et al. High-Q band rejection filter by using U-slot DGS[C]//Proceedings of the 35th European Microwave Conference. Paris, 2005: 1279-1282.
[9] Woo D-J, Lee T-K, Lee J-W, et al. Novel U-slot and V-slot DGSs for bandstop filter with improved Q factor[J]. IEEE Transactions on Microwave Theory and Techniques, 2006, 54(6): 2840-2847.
[10] Guha D, Biswas S, Biswas M, et al. Concentric ring-shaped defected ground structures for microstrip applications [J]. IEEE Antennas and Wireless Propagation Letters, 2006, 5(12): 402-405.
[11] Zhu Y, Zhang X, Li C, et al. Novel compact meander-slot DGS with high quality factor [J]. Microwave and Optical Technology Letters, 2008, 50(11): 3164-3169.

Memo

Memo:

Biographies: Zhu Yizhi(1981—), male, graduate; Zhang Xiaojuan(corresponding author), female, doctor, professor, xjzhang@mail.ie.ac.cn.
Foundation items: The National Natural Science Foundation of China(No.60890071), the National High Technology Research and Development Program of China(863 Program)(No.2009AA01Z132).
Citation: Zhu Yizhi, Zhang Xiaojuan, Fang Guangyou. Novel S-slot DGS with high quality factor[J]. Journal of Southeast University(English Edition), 2009, 25(4): 431-434.

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