In this paper, we introduce a new technique for an electronic beam scanning/directivity reconfigurable which can be carried out by using a joint array of Metallic Electromagnetic Band Gap (M-EBG) sectoral antennas. This study opens new avenues of research on M-EBG sectoral antennas by combining multiple radiating elements in an array. Usually M-EBG structures are designed in passive configurations to radiate fixed/shaped beams thanks to a specific radiating aperture at the surface of the M-EBG antenna. However by opting this new technique, we are able to control the radiating aperture, and therefore provide a tunable directivity/beam pattern. The objective of the paper is to propose a solution for M-EBG antennas in order to achieve Beam Scanning and Directivity reconfigurability. The main advantage of the proposed technique is that the array have negligible mutual coupling between the radiating elements, simplifying therefore the conception of the beam-forming network and the problems of constrained beam scanning. Another objective of the paper is to be able to achieve wide angle beam scanning -/+58 degrees. This method makes it possible to obtain in a simple way an agile M-EBG antenna without the need of the expensive active electronic components. Several results show the effectiveness and the capabilities of the proposed technique.
6. Edelberg, S. and A. Oliner, "Mutual coupling effects in large antenna arrays II: Compensation effects," IRE Transactions on Antennas and Propation, Vol. 8, No. 4, 360-367, 1960. doi:10.1109/TAP.1960.1144870
7. Guo, Y., A. P. Feresidis, G. Goussetis, and J. C. Vardaxoglou, "Efficient modelling technique for fractal electromagnetic band-gap arrays," IET Proceedings of Science Measurement and Technology, 467-470, 2004. doi:10.1049/ip-smt:20040946
8. Poilasne, G., P. Pouliguen, K. Mahdjoubi, L. Desclos, and C. Terret, "Active metallic photonic band-gap materials: Experimental results on beam shaper," IEEE Trans. Antennas Propagat., Vol. 48, No. 1, 117-119, Jan. 2000. doi:10.1109/8.827392
9. Yuang, F. and Y. Rahmat-Samii, "Microstrip antennas integrated with electromagnetic band-gap (EBG) structures: A low mutual coupling designed for array applications," IEEE Trans. Antennas Propagat., Vol. 51, 2003.
10. Hajj, M., E. Rodes, D. Serhal, T. Monediere, and B. Jecko, "Design of sectoral antennas using a metallic EBG structure and multiple sources feeding for base station applications," International Journal of Antennas and Propagation, Vol. 8, 6, 2009.
11. Hajj, M., E. Rodes, and T. Monediere, "Dual-band EBG sectoral antenna using a single-layer FSS for UMTS application," IEEE Antennas Wireless Propag. Lett., Vol. 8, 161-164, 2009. doi:10.1109/LAWP.2009.2012914
12. Hajj, M., D. Serhal, and R. Chantalat, "New development around M-PRS antennas for sectoral coverage of telecommunication networks with dual polarization," IEEE Antennas Wireless Propag. Lett., Vol. 8, 670-673, 2009. doi:10.1109/LAWP.2009.2021417
13. Butler, J. and R. Lowe, "Beam-forming matrix simplifies design of electrically scanned antennas," Electronic Design, Apr. 1961.
14. Blass, J., "Multi-directional antenna --- New approach top stacked beams," IRE International Convention Record, 48-50, 1960. doi:10.1109/IRECON.1960.1150892
15. Koubeissi, M., Etude d'antennes multifaisceaux à base d'une nouvelle topologie de matrice de Butler. Conception du dispositif de commande associé, No. 40-2007 Thèse de Doctorat, Université de Limoges, Oct. 21, 2007.
16. Combes, P. F., Micro-Ondes, 228-237, Dunod, Tome 2, Paris, France, 1997.
17. Vardaxoglou, J. C., Frequency Selective Surfaces: Analysis and Design, Research Studies, Somerset, UK, 1997.