Antipodal Vivaldi Antenna Performance Booster Exploiting Snug-in Negative Index Metamaterial

doi:10.2528/PIERC12012906

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Progress In Electromagnetics Research C	ISSN: 1937-8718

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ANTIPODAL VIVALDI ANTENNA PERFORMANCE BOOSTER EXPLOITING SNUG-IN NEGATIVE INDEX METAMATERIAL

By A. R. H. Alhawari, A. Ismail, M. A. Mahdi, and R. S. A. Raja Abdullah

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Abstract:
Despite its popularity, the conventional Vivaldi antenna has long suffered from some design problems, such as tilted beam, low or inconsistent directivity and gain, complicated design and fabrication methods, and limited size reduction. These setbacks make its progress lag on the fast track of technological demand. Thus, the antenna overall performance is anticipated to improve by incorporating negative index metamaterial (NIM) into the design method, plus, it is also tunable. In this study, the design uses linearly-tapered shape-loading structure, as its projected performance crucially depends on the space in between the antenna arms, a prerequisite to further boost its performance when combined with NIM technology. A unique slitting approach synchronizes the integration between the Vivaldi antenna and NIM where a single layer NIM piece is simply snugged into the slit perpendicular to the middle antenna substrate. The major improvement in the spotlight is the capability of NIM to focus the entire beam so that it can radiate to the targeted direction. The measurement results are similar to the simulations in terms of high gain, where the gain and directivity of the antenna are increased up to 4 dB. The contrast of overall performance between the plain modified Vivaldi antenna and the ones with NIM evidently asserts the expected contribution of snug and boost method applied and attests its significant potentials for a broad range of ultra-wideband applications.

Citation:
A. R. H. Alhawari, A. Ismail, M. A. Mahdi, and R. S. A. Raja Abdullah, "Antipodal Vivaldi Antenna Performance Booster Exploiting Snug-in Negative Index Metamaterial," Progress In Electromagnetics Research C, Vol. 27, 265-279, 2012.
doi:10.2528/PIERC12012906

References:
1. Gibson, , P. J., "The Vivaldi aerial," 9th European Microwave Conference, , 101-105, , 1979.
doi:10.1109/EUMA.1979.332681

2. Mehdipour, , A., , K. Mohammadpour-Aghdam, and R. Faraji-Dana, "Complete dispersion analysis of Vivaldi antenna for ultra wideband applications," Progress In Electromagnetics Research, Vol. 77, 85-96, , 2007.
doi:10.2528/PIER07072904

3. Wang, , Z. , H. Zhang, and , "Improvements in a high gain UWB antenna with corrugated edges," Progress In Electromagnetics Research C , Vol. 6, 159-166, 2009.
doi:10.2528/PIERC09011404

4. Jolani, , F., G. R. Dadashzadeh, M. Naser-Moghadasi, and A. M. Dadgarpour, "Design and optimization of compact balanced antipodal Vivaldi antenna," Progress In Electromagnetics Research C, Vol. 9, 183-192, , 2009.
doi:10.2528/PIERC09071510

5. Bai, , J., , S. Shi, and D. W. Prather, "Modified compact antipodal Vivaldi antenna for 4--50 GHz UWB application," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, 1051-1057, 2011..
doi:10.1109/TMTT.2011.2113970

6. Kota, , K. , L. Shafai, and , "Gain and radiation pattern enhancement of balanced antipodal Vivaldi antenna," Electronics Letters , Vol. 47, 303-304, , 2011.
doi:10.1049/el.2010.7579

7. Fei, , P., , Y. Jiao, W. Hu, and F. Zhang, "A miniaturized antipodal Vivaldi antenna with improved radiation characteristics," IEEE Antennas and Wireless Propagation Letters, Vol. 10, 127-130, 2011.
doi:10.1109/LAWP.2011.2112329

8. Yang, , Y., , Y. Wang, and A. E. Fathy, "Design of compact Vivaldi antenna arrays for UWB see through wall applications," Progress In Electromagnetics Research , Vol. 82, 401-418, 2008.
doi:10.2528/PIER08040601

9. Lin, , S., , S. Yang, A. E. Fathy, and A. Elsherbini, "Development of a novel UWB Vivaldi antenna array using SIW technology," Progress In Electromagnetics Research , Vol. 90, 369-384, , 2009.
doi:10.2528/PIER09020503

10. Bourqui, J., , M. Okoniewski, and E. C. Fear, "Balanced antipodal Vivaldi antenna with dielectric director for near-field microwave imaging," IEEE Transactions on Antennas and Propagations, Vol. 58, No. 7, 2318-2326, , 2010.
doi:10.1109/TAP.2010.2048844

11. Kota, , K. , L. Shafai, and , "Gain and radiation pattern enhancement of balanced antipodal Vivaldi antenna," Electronics Letters, Vol. 47, No. 5, 303-304, , 2011.
doi:10.1049/el.2010.7579

12. Zhou, , B. , T. J. Cui, and , "Directivity enhancement to Vivaldi antennas using compactly anisotropic zero-index metamaterials," IEEE Antennas and Wireless Propagation Letters, , Vol. 10, 326-329, 2011.
doi:10.1109/LAWP.2011.2142170

13. Zhou, , B., , 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.

14. Alhawari, , A. R. H., A. Ismail, M. A. Mahdi, and R. S. A. Raja Abdullah, "Development of novel tunable dual-band negative index metamaterial using open stub-loaded stepped-impedance resonator," Progress In Electromagnetics Research B, Vol. 35, 111-131, 2011.
doi:10.2528/PIERB11082209

15. Computer Simulation Technology (CST) Microwave Studio, , 2010.

16. Chen, X., Chen, X., T. M. Grzegorczyk, B. I. Wu, J. Pacheco, and J. A. Kong, "Robust method to retrieve the constitutive effective parameters of metamaterials," Physical Review E, , Vol. 70, 2004.

17. Smith, , D. R., , D. C. Vier, T. Koschny, and C. Soukoulis, "Electromagnetic parameter retrieval from inhomogeneous metamaterials," Physical Review E,, Vol. 71, 2005.