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Reflectarray antennas

Reflectarray antennas

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Developments in Antenna Analysis and Design: Volume 2 — Recommend this title to your library

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The principal concepts of reflectarray antennas have been reviewed in this chapter. Reflectarrays have shown several advantages with respect to reflector and phased-array counterparts. Reflectarrays have demonstrated their capability to produce shaped beams, independent beamforming in each polarization, multi-frequency operation, among others. The limited bandwidth has been significantly overcame by different techniques, including the development of multi-resonant broadband cells and compensation of the spatial phase delay. Different contributions to the state of the art in the topic of reflectarrays for fixed and reconfigurable beams have been presented, including a large variety of the reflectarray cells proposed to improve the antenna performance using different technologies. Some selected recent and ongoing developments have been summarized. Examples such as contour-beam and multibeam reflectarrays, steerable-beam reflectarrays, dual-reflector antennas, reflectarrays in solar panels and deployable and inflatable reflectarrays have been presented. Finally, some challenging technologies and materials, such as 3-D printing, liquid crystals or graphene, can be very promising for future applications in terahertz. The results presented here show a great potential of reflectarrays for passive and reconfigurable antennas in a large range of frequencies from microwaves to terahertz and even optical frequencies.

Chapter Contents:

  • 10.1 Introduction
  • 10.2 Basic concepts on reflectarray antennas
  • 10.3 Elementary cells in reflectarrays
  • 10.4 Analysis and design of reflectarray antennas
  • 10.4.1 Analysis and design of reflectarray elements
  • 10.4.2 Design and analysis of reflectarray antenna
  • 10.5 Broadband techniques in reflectarrays
  • 10.6 Shaped and multi-beam reflectarrays
  • 10.7 Dual-reflector configurations
  • 10.8 Technological challenges
  • 10.8.1 Deployable and inflatable reflectarrays
  • 10.8.2 Reflectarrays and solar cells
  • 10.8.3 3-D printed reflectarrays
  • 10.8.4 Reflectarrays at terahertz and optical frequencies
  • 10.8.5 Liquid crystal reflectarrays
  • 10.8.6 Reflectarrays using graphene
  • 10.9 Conclusions
  • Acknowledgement
  • References

Inspec keywords: shaped beam antennas; reflectarray antennas; multibeam antennas; broadband antennas

Other keywords: deployable reflectarrays; passive antennas; fixed beams; bandwidth; optical frequencies; multibeam reflectarrays; multifrequency operation; beamforming; multiresonant broadband cells; reflectarray antennas; solar panels; microwaves; inflatable reflectarrays; contour-beam reflectarrays; 3-D printing; dual-reflector antennas; terahertz; antenna performance; polarization; terahertz applications; steerable-beam reflectarrays; liquid crystals; reconfigurable beams; shaped beams; graphene; spatial phase delay compensation

Subjects: Antenna arrays

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