PIER
 
Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 120 > pp. 235-247

BROADBAND AND HIGH-GAIN PLANAR VIVALDI ANTENNAS BASED ON INHOMOGENEOUS ANISOTROPIC ZERO-INDEX METAMATERIALS

By B. Zhou, H. Li, X. Zou, and T.-J. Cui

Full Article PDF (2,671 KB)

Abstract:
Vivaldi antennas have broad applications in real practice due to the ultra wideband properties. However, their gain and directivity are relatively low. In this paper, a new method is presented to improve the gain and directivity of Vivaldi antennas in a broad band using inhomogeneous and anisotropic (IA) zero-index metamaterials (ZIM). ZIM have the ability to enhance the antenna directivity; anisotropic ZIM with only one component of the permittivity or permeability tensor approaching to zero can make impedance match to improve the radiation efficiency; and IA-ZIM can broaden the frequency bandwidth. Single- and multiple-layered planar IA-ZIM have been analyzed, designed, and fabricated, which can be embedded into the original Vivaldi antenna smoothly and compactly. The IA-ZIM-based Vivaldi antennas have good features of high gain, high directivity, low return loss, and broad bandwidth. Compared to the original Vivaldi antenna, the measurement results show that the gain has been increased by 3 dB and the half-power beam width has been decreased by 20 degrees with the reflection coefficient less than -10 dB from 9.5 GHz to 12.5 GHz after using IA-ZIM.

Citation:
B. Zhou, H. Li, X. Zou, and T.-J. Cui, "Broadband and High-Gain Planar Vivaldi Antennas Based on Inhomogeneous Anisotropic Zero-Index Metamaterials," Progress In Electromagnetics Research, Vol. 120, 235-247, 2011.
doi:10.2528/PIER11072710
http://www.jpier.org/PIER/pier.php?paper=11072710

References:
1. Gibson, P. J., "The Vivaldi aerial," Proc. 9th Eur. Microwave Conf., No. 1, 101-105, 1979.
doi:10.1109/EUMA.1979.332681

2. Chiappe, M. and G. Gragnani, "Vivaldi antennas for microwave imaging: Theoretical analysis and design considerations," IEEE Transactions on Instrumentation and Measurement, Vol. 55, No. 2, 1885-1891, 2006.
doi:10.1109/TIM.2006.884289

3. Schantz, H., "Introduction to ultra-wideband antennas," IEEE Conference on Ultra Wideband Systems and Technologies, No. 3, 1-9, 2003.
doi:10.1109/UWBST.2003.1267792

4. Ellis, T. J. and G. M. Rebeiz, "MM-wave tapered slot antennas on micromachined photonic bandgap dielectrics," IEEE MTT-S Int. Microwave Symp. Dig., No. 4, 1157-1160, 1996.

5. Lovat, G., et al., "Analysis of directive radiation from a line source in a metamaterial slab with low permittivity," IEEE Transactions on Antennas and Propagation, Vol. 54, No. 5, 1017-1030, 2006.
doi:10.1109/TAP.2006.869925

6. Zhou, H., et al., "A novel high-directivity microstrip patch antenna based on zero-index metamaterial," IEEE Antennas and Wireless Propagation Letters, Vol. 8, No. 6, 538-541, 2009.
doi:10.1109/LAWP.2009.2018710

7. Wu, B.-I., W.Wang, J. Pacheco, X. Chen, T. M. Grzegorczyk, and J. A. Kong, "A study of using metamaterials as antenna substrate to enhance gain," Progress In Electromagnetics Research, Vol. 51, No. 5, 295-328, 2005.
doi:10.2528/PIER04070701

8. Yang, R., Y.-J. Xie, P.Wang, and L. Li, "Microstrip antennas with left-handed materials substrates," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 9, 1221-1233, 2006.
doi:10.1163/156939306777442908

9. Oraizi, H., A. Abdolali, and N. Vaseghi, "Application of double zero metamaterials as radar absorbing materials for the reduction of radar cross section," Progress In Electromagnetics Research, Vol. 101, 323-337, 2010.
doi:10.2528/PIER10010603

10. Wang, B. and K. Huang, "Shaping the radiation pattern with mu and epsilon-near-zero metamaterials," Progress In Electromagnetics Research, Vol. 106, 107-119, 2010.
doi:10.2528/PIER10060103

11. Ma, Y., et al., "Near-field plane-wave-like beam emitting antenna fabricated by anisotropic metamaterial," Applied Physics Letters, Vol. 94, No. 7, 2009.

12. Cheng, Q., et al., "Radiation of planar electromagnetic waves by line source in anisotropic metamaterials," Journal of Physics D: Applied Physics, Vol. 43, No. 8, 35406, 2010.

13. Zhou, B. and T. J. Cui, "Directivity enhancement to Vivaldi antennas using compactly anisotropic zero-index metamaterials," IEEE Antennas and Wireless Propagation Letters, Vol. 10, No. 9, 2011.

14. Tang, W. X., H. Zhao, X. Zhou, J. Y. Chin, and T.-J. Cui, "Negative index material composed of meander line and SRRs," Progress In Electromagnetics Research B, Vol. 8, 103-114, 2008.
doi:10.2528/PIERB08051201

15. Smith, D., et al., "Determination of effective permittivity and permeability of metamaterials from reflection and transmission coefficients," Physical Review B, Vol. 65, No. 11, 195104, 2002.
doi:10.1103/PhysRevB.65.195104

16. Bai, J., S. Shi, and D. W. Prather, "Modified compact antipodal Vivaldi antenna for 4--50-GHz UWB application," IEEE Trans. Microwave Theory Tech., Vol. 59, No. 12, 1051-1057, 2011.
doi:10.1109/TMTT.2011.2113970


© Copyright 2014 EMW Publishing. All Rights Reserved