volume | PIER Journals

Abstract

Transformation optics is a convenient method to control paths of electromagnetic waves and radiation characteristics of antennas. In this paper, we try to increase the gain of Balanced Antipodal Vivaldi Antenna (BAVA) over 8-16 GHz frequency band using an optical conformal transformation. The proposed antenna can be implemented by ordinary dielectric materials and graded photonic crystals (GPCs). In this designed BAVA, better side lobe level (SLL) and cross-polarization are achieved compared to a conventional BAVA. Simulation results validate the performance of the design approach.

1. Natarajan, R., J. V. George, M. Kanagasabai, and A. Kumar Shrivastav, "A compact antipodal vivaldi antenna for UWB applications," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1557-1560, 2015.
doi:10.1109/LAWP.2015.2412255 Google Scholar

2. Milligan, T. A., Modern Antenna Design, 2nd Ed., Wiley Interscience, IEEE Press, 2005.
doi:10.1002/0471720615

3. Wang, Y. W., G. M. Wang, and B. F. Zong, "Directivity Improvement Of Vivaldi Antenna Using Double-Slot Structure," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 2013. Google Scholar

4. Gibson, P. J., "The Vivaldi aerial," Microwave Conference, 101-105, 1979. Google Scholar

5. Langley, J., P. Hall, and P. Newham, "Novel ultrawide-bandwidth Vivaldi antenna with low cross polarisation," Electronics Lett., Vol. 29, No. 23, 2004-2005, 1993.
doi:10.1049/el:19931336 Google Scholar

6. Langley, J. D. S., P. S. Hall, and P. Newham, "Balanced antipodal Vivaldi antenna for wide bandwidth phased arrays," IEE Proc. - MMOW Antennas Propag., Vol. 143, No. 2, April 1996. Google Scholar

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

8. Molaei, A., M. Kaboli, S. A. Mirtaheri, and M. S. Abrishamian, "Dielectric lens balanced antipodal Vivaldi antenna with low cross-polarisation for ultra-wideband applications," IET Microwaves, Antennas & Propagation, Vol. 8, No. 14, 1137-1142, 2014.
doi:10.1049/iet-map.2014.0207 Google Scholar

9. Pendry, J. B., D. Schuring, and D. R. Smith, "Controlling electromagnetic fields," Science, Vol. 312, No. 5781, 1780-1782, 2006.
doi:10.1126/science.1125907 Google Scholar

10. Leonhardt, U., "Optical conformal mapping," Science, Vol. 312, No. 5781, 1777-1780, 2006.
doi:10.1126/science.1126493 Google Scholar

11. Schurig, D., J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, "Metamaterial electromagnetic cloak at microwave frequencies," Science, Vol. 314, No. 5801, 977-980, 2006.
doi:10.1126/science.1133628 Google Scholar

12. Turpin, J. P., A. T. Massoud, Z. H. Jiang, P. L. Werner, and D. H. Werner, "Conformal mappings to achieve simple material parameters for transformation optics devices," Optics Express, Vol. 18, No. 1, 244-252, 2009.
doi:10.1364/OE.18.000244 Google Scholar

13. Shahcheraghi, S. and A. Yahaghi, "Design of a pyramidal horn antenna with low E-plane sidelobes using transformation optics," Progress In Electromagnetics Research M, Vol. 44, 109-118, 2015.
doi:10.2528/PIERM15030905 Google Scholar

14. Aghanejad, I., H. Abiri, and A. Yahaghi, "Design of high-gain lens antenna by gradient-index metamaterials using transformation optics," IEEE Trans. Antennas and Propagation, Vol. 18, No. 1, 4074-4081, 2012.
doi:10.1109/TAP.2012.2207051 Google Scholar

15. Landy, N. I. and W. J. Padilla, "Guiding light with conformal transformations," Optics Express, Vol. 17, 14872-14879, 2009.
doi:10.1364/OE.17.014872 Google Scholar

16. Vasic, B., G. Isic, R. Gajic, and K. Hingerl, "Controlling electromagnetic fields with graded photonic crystals in metamaterial regime," Optics Express, Vol. 18, 20321-20333, 2010.
doi:10.1364/OE.18.020321 Google Scholar

Dr. Fatemeh Etesami

Dr. Shapur Khorshidi

Dr. Shaghayegh Shahcheraghi

Dr. Alireza Yahaghi