Abstract
A compact wideband antenna place above a non-uniform artificial magnetic conductor (AMC) is presented. The antenna is composed of a wideband coplanar waveguide fed antenna, with wideband harmonic suppression characteristic using non-uniform defected ground structure. Besides, a non-uniform wideband AMC is designed. The AMC unit cell is composed of a square patch into which a four arms spiral shape is etched. It exhibits a wider ±90° bandwidth than the spiral unit cell and a smaller size than the square patch unit cell. The antenna is placed above the proposed AMC structure formed by 6 × 5 unit cells. The overall dimensions of the complete structure are 0.7 × 0.6 λ 20 , where λ 0 is the free-space wavelength at the lowest frequency. It offers a low-profile configuration with a total thickness of λ 0/14.3, and it is matched between 2.5 and 5.4 GHz (73.5 %). Furthermore, it has a stable main lobe radiation pattern in the E- and H-planes within the operating frequency band. Moreover, compared with the antenna without AMC, the broadside realized gain is significantly increased. A prototype has been realized, and there is a good agreement between simulated and measured results. Furthermore, the proposed structure presents a size reduction of about 34 %, and better radiation characteristics in comparison with the conventional square AMC.
Similar content being viewed by others
References
D. Sievenpiper, High-Impedance Electromagnetic Surfaces, Ph.D. Dissertation, University of California, Los Angeles, 1999
F. Yang, Y. Rahmat, Electromagnetic Band Gap Structures in Antenna Engineering (Cambridge University Press, Cambridge, 2009)
D. Sievenpiper, L. Zhang, R. Broas, N. Alexopolous, E. Yablonovitch, High-impedance electromagnetic surfaces with a forbidden frequency band. IEEE Trans. Microw. Theory Tech. 47(11), 2059–2074 (1999)
J.R. Sohn, K.Y. Kim, H.-S. Tae, H.J. Lee, Comparative study on various artificial magnetic conductors for low-profile antenna. Prog Electromagn Res 61, 27–37 (2006)
Y. Wenwen, H. Guang, H. Wei, Wideband artificial magnetic conductor structure for Ku-band antenna applications, Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, in 2009 3rd IEEE Intern. Symposium on, pp. 954–957, 27–29 October 2009
M. de Cos, Y. Alvarez, F. Las-Heras, Novel broadband artificial magnetic conductor with hexagonal unit cell. Antennas Wirel. Propag. Lett. IEEE 10, 615–618 (2011)
M. Grelier, Miniaturisation des antennes large bande à l’aide de matériaux artificiels, Chapter 4, Ph.D. Dissertation, Telecom ParisTech, Paris, France, 2011
N. Marcuvitz, Waveguide Handbook Chapter 5, 2nd edn. (Peter Peregrinus Ltd, London, 1986)
M. Hosseini, A. Pirhadi, M. Hakkak, Design of a non-uniform high impedance surface for a low profile antenna, in Progress In Electromagnetics Research Symp, Cambridge, USA, 2006
M. Hosseini, A. Pirhadi, R. Fallahi, M. Hakkak, Bandwidth enhancement of a low profile antenna by applying non-uniformity to its high impedance ground plane, Mathematical Methods in Electromagnetic Theory, 2006 International Conference, pp. 202–204, 26–29 June 2006
L. Damaj, A.C. Lepage, X. Begaud, Compact wideband harmonic suppressed antenna using non-uniform cascaded defected ground structure. Microw. Opt. Technol. Lett. 55(4), 829–835 (2013)
L. Mouffok, L. Damaj, X. Begaud, A.C. Lepage, H. Diez, Mutual coupling reduction between dual polarized microstrip patch antennas using compact spiral Artificial Magnetic Conductor, Antennas and Propagation (EUCAP), Proceedings of the 5th European Conference on, pp. 909–912, 11–15 April 2011
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Damaj, L., Lepage, AC. & Begaud, X. Compact wideband antenna above a wideband non-uniform artificial magnetic conductor. Appl. Phys. A 117, 705–711 (2014). https://doi.org/10.1007/s00339-014-8726-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00339-014-8726-3