volume | PIER Journals

Abstract

This paper presents a novel elliptic shape defected ground structure (DGS) for low pass filter (LPF) applications. An equivalent RLC circuit model is presented and its corresponding parameters are also extracted from the measured S-parameters. The filter presents the advantages of compact size,high selectivity; low insertion loss and high out-band suppression from 5.15 GHz to 10 GHz below -31 dB. Good agreement with response of equivalent circuit, electromagnetic simulation, and measurement is demonstrated.

1. Park, J., J. P. Kim, and S. Nam, "Design of a novel harmonicsuppressed microstrip low-pass filter," IEEE Microw. Wirel. Compon. Lett., Vol. 17, No. 6, 424-426, 2007.
doi:10.1109/LMWC.2007.897789 Google Scholar

2. Shobeyri, M. and M. H. Vadjed-Samiei, "Compact ultra-wideband bandpass filter with defected ground structure," Progress In Electromagnetics Research Letters, Vol. 4, 25-31, 2008.
doi:10.2528/PIERL08050205 Google Scholar

3. Naghshvarian-Jahromi, M. and M. Tayarani, "Miniature planar UWB bandpass filters with circular slots in ground," Progress In Electromagnetics Research Letters, Vol. 3, 87-93, 2008.
doi:10.2528/PIERL08020902 Google Scholar

4. Oraizi, H. and M. S. Esfahlan, "Miniaturization of Wilkinson power dividers by using defected ground structures," Progress In Electromagnetics Research Letters, Vol. 4, 113-120, 2008.
doi:10.2528/PIERL08060701 Google Scholar

5. Chen, X.-Q., X.-W. Shi, Y.-C. Guo, and M.-X. Xiao, "A novel dual band transmitter using microstrip defected ground structure," Progress In Electromagnetics Research Letters, Vol. 4, 113-120, 2008. Google Scholar

6. Oskouei, H. D., K. Forooraghi, and M. Hakkak, "Guided and leaky wave characteristics of periodic defected ground structures," Progress In Electromagnetics Research, Vol. 73, 15-27, 2007.
doi:10.2528/PIER07031701 Google Scholar

7. Chen, J., Z.-B. Weng, Y.-C. Jiao, and F.-S. Zhang, "Lowpass filter design of Hilbert curve ring defected ground structure," Progress In Electromagnetics Research, Vol. 70, 269-280, 2007.
doi:10.2528/PIER07012603 Google Scholar

8. Sharma, R., T. Chakravarty, S. Bhooshan, and A. B. Bhattacharyya, "Design of a novel 3 db microstrip backward wave coupler using defected ground structure," Progress In Electromagnetics Research, Vol. 65, 261-273, 2006.
doi:10.2528/PIER06100502 Google Scholar

9. Zhang, F. and C. F. Li, "Power divider with microstrip electromagnetic bandgap element for miniaturisation and harmonic rejection," Electron. Lett., Vol. 44, No. 6, 422-424, 2008.
doi:10.1049/el:20083693 Google Scholar

10. Hong, J. S. and B. M. Karyamapudi, "A general circuit model for defected ground structure's in planar transmission lines," IEEE Microw. Wirel. Compon. Lett., Vol. 15, No. 10, 706-708, 2005.
doi:10.1109/LMWC.2005.856832 Google Scholar

11. 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. Microw. Theory Tech., Vol. 49, No. 1, 86-93, 2001.
doi:10.1109/22.899965 Google Scholar

12. Boutejdar, A., A. Elsherbini, and A. Ornar, "Design of a novel ultra-wide stopband lowpass filter using h-defected ground structure," Microw. Opt. Technol. Lett., Vol. 50, No. 3, 771-775, 2008.
doi:10.1002/mop.23189 Google Scholar

13. Piscarreta, D. and S. W. Ting, "Microstrip parallel coupledline bandpass filter with selectivity improvement using u-shaped defected ground structure," Microw. Opt. Technol. Lett., Vol. 50, No. 4, 911-915, 2008.
doi:10.1002/mop.23236 Google Scholar

14. Xiao, J. K., S. W. Ma, S. Zhang, and Y. Li, "Novel compact split ring stepped-impedance resonator (sir) bandpass filters with transmission zeros," J. Electromagn. Waves Appl., Vol. 21, No. 3, 329-339, 2007.
doi:10.1163/156939307779367369 Google Scholar

Dr. Xiao-Qun Chen

Dr. Rui Li

Dr. Shang-Jie Shi

Dr. Qing Wang

Dr. Le Xu

Professor Xiao-Wei Shi