Review paper on Transmitarray Antennas
Reis, J. R.
IEEE Access Vol. 7, Nº 1, pp. 94171 - 94188, December, 2019.
ISSN (print): 2169-3536
Journal Impact Factor: (in )
Digital Object Identifier: 10.1109/ACCESS.2019.2924293
This article presents a thorough review on transmitarray devices particularly aiming antenna beamsteering, gathering some of the most relevant solutions published by the scientific community in the field. Firstly, the background for realising one- and two-dimensional antenna beamsteering with a transmitarray is introduced. Subsequently, several examples of unit-cells for transmitarray implementation and complete transmitarray designs presented in the literature are outlined. Each solution is analyzed in detail, identifying the nature of its layout, e.g. based on microstrip patchs, frequency selective surfaces (FSS) or metamaterials (MM), and the method employed to enable electronic reconfigurability, e.g. p-i-n diodes, varactor diodes or Microelectromechanical systems (MEMS). In addition, some models with the capability of controlling the wavefront polarization modes are also included herein since these are the base of hybrid transmitarrays, i.e. transmitarray with both electronic beamsteering and polarization control. Finally, all the models are compared against each other in order to highlight their benefits and limitations, summarizing their main characteristics such as frequency of operation and bandwidth, insertion loss, physical dimensions and maximum beamsteering range, when available.