Research Article Open Access

Reflectivity of Reflectarrays Based on Dielectric Substrates

M. Y. Ismail1, M. Inam1 and A. M.A. Zaidi1
  • 1 ,
American Journal of Engineering and Applied Sciences
Volume 3 No. 1, 2010, 180-185

DOI: https://doi.org/10.3844/ajeassp.2010.180.185

Submitted On: 14 December 2009 Published On: 31 March 2010

How to Cite: Ismail, M. Y., Inam, M. & Zaidi, A. M. (2010). Reflectivity of Reflectarrays Based on Dielectric Substrates. American Journal of Engineering and Applied Sciences, 3(1), 180-185. https://doi.org/10.3844/ajeassp.2010.180.185

Abstract

Problem statement: Reflectarrays provide a low cost and low profile solution for antennas required for high gain applications but their use is restricted in some applications due to the narrow bandwidth and high loss performance. These performance limitations can be attributed to different sources of reflectivity of the reflectarrays. This work provides a thorough investigation on the reflectivity performance of reflectarrays designed at 10 GHz using different dielectric substrates. Approach: The detailed analytical study of the characteristics and losses of the reflectarrays was presented and a number of dielectric substrates are used to design and analyze the reflectivity of the reflectarrays based on the analytical investigation which is validated by Finite Integral Method (FIM). Results: The results showed that the dielectric material with lowest dielectric permittivity and loss tangent values (Teflon) demonstrates an optimum reflectivity performance when employed for the reflectarray design. Conclusion: It was concluded from this research that material properties significantly affect the reflectivity of the reflectarrays and hence the bandwidth and loss performance can be pronounced improved by using a low dielectric substrate.

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Keywords

  • Reflectivity
  • reflectarray
  • reflection loss
  • bandwidth
  • phase errors