volume | PIER Journals

2015-03-25

A Novel Coupled-Defected Ground Structure with Enhanced Coupling-Coefficient and Its Application in Filter Design

Si-Si Chen,

Dr. Si-Si Chen

Department of Electronic Engineering

Zhejiang Sci-Tech University

China

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Lin Li,

Dr. Lin Li

Zhejiang Sci-Tech University

China

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Zhi-Yong Chen

Dr. Zhi-Yong Chen

Department of Communication Engineering

Zhejiang Sci-Tech University

China

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Progress In Electromagnetics Research Letters, Vol. 52, 93-97, 2015

doi:10.2528/PIERL15020502

Abstract

A novel coupled-defected ground structure (C-DGS) with inductors inserted between the adjacent defected ground structure (DGS) cells is presented in this paper. In comparison to conventional C-DGS structure, the proposed C-DGS exhibits a larger coupling-coefficient, resulting in a wider stop-band. Moreover, the stopband can be adjusted flexibly without modification since the coupling-coefficient varies with the change of the inductance of the inserted inductor. Based on this new C-DGS, a low-pass filter (LPF) using cascaded C-DGS is constructed. The proposed structure is experimentally verified through the demonstration of a low-pass filter design.

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Si-Si Chen, Lin Li, and Zhi-Yong Chen, "A Novel Coupled-Defected Ground Structure with Enhanced Coupling-Coefficient and Its Application in Filter Design," Progress In Electromagnetics Research Letters, Vol. 52, 93-97, 2015.
doi:10.2528/PIERL15020502

References

1. Woo, D.-J., T.-K. Lee, J.-W. Lee, C.-S. Pyo, and W.-K. Choi, "Novel U-slot and V-slot DGSs for bandstop filter with improved Q factor," IEEE Trans. on Microw. Theory and Tech., Vol. 54, No. 6, 2840-2847, Jun. 2006.
doi:10.1109/TMTT.2006.875450

2. Balalem, A., A. R. Ali, J. Machac, and A. Omar, "Compact band-stop filter using an interdigital DGS structure," IEEE 14th Microw. Tech. Conference, 1-3, Prague, Apr. 2008.

3. Ahn, D., J.-S. Park, C.-S. Kim, J. Kim, Y.-X. Qian, and T. Itoh, "A design of the low-pass filter using the novel microstrip defected ground structure," IEEE Trans. on Microw. Theory and Tech., Vol. 49, No. 1, 86-93, Jan. 2001.
doi:10.1109/22.899965

4. Abdel-Rahman, A., A. K. Verma, A. Boutejdar, and A. S. Omar, "Compact stub type microstrip bandpass filter using defected ground plane," IEEE Microw. and Wireless Compon. Lett., Vol. 14, No. 4, 136-138, Apr. 2004.
doi:10.1109/LMWC.2003.821503

5. Oraizi, H. and S. Hedayati, "Miniaturization of microstrip antennas by the novel application of the Giuseppe Peano fractal geometries," IEEE Trans. on Ante. and Propa., Vol. 60, No. 8, 3559-3567, Aug. 2012.
doi:10.1109/TAP.2012.2201070

6. Jung, S., Y.-K. Lim, and H.-Y. Lee, "A coupled-defected ground structure lowpass filter using inductive coupling for improved attenuation," Microw. and Opt. Technol. Lett., Vol. 50, No. 6, 1541-1543, Jun. 2008.
doi:10.1002/mop.23419

7. Wu, S.-J., C.-H. Tsai, and T.-L. Wu, "A novel wideband common-mode suppression filter for GHz differential signals using coupled patterned ground structure," IEEE Trans. on Microw. Theory and Tech., Vol. 57, No. 4, 848-855, Apr. 2009.
doi:10.1109/TMTT.2009.2015087