In this paper, a new calculating method for the characteristic impedance (Zc) of transmission lines with perturbation and periodic modified ground structure (MGS), such as defected ground structure (DGS), photonic bandgap (PBG), and substrate integrated artificial dielectric (SIAD), is discussed. The proposed method is based on simple transmission line theories and proper related equations. The previous method to find Zc of transmission lines with MGS or perturbation produces the fluctuating Zc value depending on frequency, while the proposed method results in a constant value without frequency-dependence. As examples, several microstrip lines with DGS, PBG, and SIAD structure are simulated and measured, and their Zc values are calculated from S-parameters by the previous and proposed methods. It is shown that the Zc obtained by the proposed method is much more reliable than that calculated by the previous method for all examples.
2. Gupta, S. K. and K. J. Vinoy, "A compact defected ground microstrip device with photonic bandgap effects," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 2-3, 255-256, 2009.
doi:10.1163/156939309787604553
3. Radisic, V., Y. Qian, R. Coccioli, and T. Itoh, "Novel 2-D photonic bandgap structure for microstrip lines," IEEE Microw. Guide Wave Lett., Vol. 8, No. 2, 69-71, Feb. 1998.
doi:10.1109/75.658644
4. Yun, T. Y. and K. Chang, "Uniplanar one-dimensional photonic-bandgap structures and resonators," IEEE Trans. Microwave Theory Tech., Vol. 49, No. 3, 549-553, Mar. 2001.
doi:10.1109/22.910561
5. Kim, C. S., J. S. Park, D. Ahn, and J. B. Lim, "A novel 1-D periodic defected ground structure for planar circuits," IEEE Microw. Guide Wave Lett., Vol. 10, No. 4, 131-133, Apr. 2000.
doi:10.1109/75.846922
6. Coulombe, M., H. V. Nguyen, and C. Caloz, "Substrate integrated artificial dielectric (SIAD) structure for miniaturized microstrip circuits," IEEE. Ant. and Wir. Prop. Lett., Vol. 6, 575-579, Dec. 2007.
doi:10.1109/LAWP.2007.910959
7. Chen, X.-Q., R. Li, S.-J. Shi, Q. Wang, L. Xu, and X.-W. Shi, "A novel low pass filter using elliptic shape defected ground structure," Progress In Electromagnetics Research B, Vol. 9, 117-126, 2008.
doi:10.2528/PIERB08071801
8. Weng, L. H., Y.-C. Guo, X.-W. Shi, and X.-Q. Chen, "An overview on defected ground structure," Progress In Electromagnetics Research B, Vol. 7, 173-189, 2008.
doi:10.2528/PIERB08031401
9. Mohra, A. S. S., "Compact lowpass filter with sharp transition band based on defected ground structures," Progress In Electromagnetics Research Letters, Vol. 8, 83-92, 2009.
doi:10.2528/PIERL09041406
10. Lim, J. S., C. S. Kim, D. Ahn, Y. C. Jeong, and S. Nam, "Design of low-pass filters using defected ground structure," IEEE Trans. Microwave Theory Tech., Vol. 53, No. 8, 2539-2545, Aug. 2005.
doi:10.1109/TMTT.2005.852765
11. Lim, J. S., S. W. Lee, C. S. Kim, J. S. Park, D. Ahn, and S. Nam, "A 4 : 1 unequal wilkinson power divider," IEEE Microw. Wireless Compon. Lett., Vol. 11, No. 3, 124-126, Mar. 2001.
doi:10.1109/7260.915624
12. Lim, J. S., C. S. Kim, J. S. Park, D. Ahn, and S. Nam, "Design of 10 dB 90°branch line coupler using microstrip line with defected ground structure," IEE Electron. Lett., Vol. 36, No. 21, 1784-1785 , 2000.
doi:10.1049/el:20001238
13. 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
14. Jeong, Y. C. and J. S. Lim, "A novel frequency doubler using feedforward technique and defected ground structure," IEEE Microw. Wireless Compon. Lett., Vol. 14, No. 12, 557-559, Dec. 2004.
doi:10.1109/LMWC.2004.837382
15. Song, Q. Y., H. R. Cheng, X. H. Wang, L. Xu, X.-Q. Chen, and X.-W. Shi, "Novel wideband bandpass filter integrating HMSIW with DGS," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 14-15, 2031-2040, 2009.
doi:10.1163/156939309789932412
16. Yang, F. R., Y. Qian, and T. Itoh, "A novel uniplanar compact PBG structure and mixer applications," IEEE MTT-S Digest, 919-922, Jun. 1999.
17. Radisic, V., Y. Qian, and T. Itoh, "Broad power amplifier using dielectric photonic bandgap structure," IEEE Microw. Guide Wave Lett., Vol. 8, No. 1, 13-14, Jan. 1998.
doi:10.1109/75.650973
18. 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
19. Chang, C.-P., C.-C. Su, S.-H. Hung, Y.-H. Wang, and J.-H. Chen, "A 6 : 1 unequal wilkinson power divider with EBG CPW," Progress In Electromagnetics Research Letters, Vol. 8, 151-159, 2009.
doi:10.2528/PIERL09032801
20. Lin, C.-M., C.-C. Su, S.-H. Hung, and Y.-H. Wang, "A compact balun based on microstrip EBG cell and interdigital capacitor," Progress In Electromagnetics Research Letters, Vol. 12, 111-118, 2009.
doi:10.2528/PIERL09092904
21. Fan, F. and Z. Yan, "Dual stopbands ultra-wideband antenna with defected ground structure," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 7, 897-904, 2009.
doi:10.1163/156939309788355252
22. Zainud-Deen, S. H., M. E. S. Badr, E. El-Deen, K. H. Awadalla, and H. A. Sharshar, "Microstrip antenna with defected ground plane structure as a sensor for landmines detection," Progress In Electromagnetics Research B, Vol. 4, 27-39, 2008.
doi:10.2528/PIERB08010203
23. Hosseini, S. A., Z. Atlasbaf, and K. Forooraghi, "Two new loaded compact palnar ultra-wideband antennas using defected ground structures," Progress In Electromagnetics Research B, Vol. 2, 165-176, 2008.
doi:10.2528/PIERB07111802
24. Biancotto, C. and P. Record, "Design of a beam forming dielectric cylindrical EBG antenna," Progress In Electromagnetics Research B, Vol. 18, 327-346, 2009.
doi:10.2528/PIERB09101506
25. Banerjee, A., "Enhanced temperature sensing by using one-dimensional ternary photonic band Gap structures," Progress In Electromagnetics Research Letters, Vol. 11, 129-137, 2009.
doi:10.2528/PIERL09080101
Submit
