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Everything about Reflectarray antenna

Beam focusing, typically horn-fed planar array of unit cells

A reflectarray antenna consists of an array of unit cells, illuminated by a feeding antenna. The feeding antenna is usually a horn. The unit cells are usually backed by a ground plane, and the incident wave reflects off them towards the direction of the beam, but each cell adds a different phase delay to the reflected signal. A phase distribution of concentric rings is applied to focus the wavefronts from the feeding antenna into a plane wave . A progressive phase shift can be applied to the unit cells to steer the beam direction. It is common to offset the feeding antenna to prevent blockage of the beam. In this case, the phase distribution on the reflectarray surface needs to be altered. A reflectarray focuses a beam in a similar way to a parabolic reflector (dish), but with a much thinner form factor. Wikipedia →

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  1. Read the overview: Reflectarray antennaA 5-minute orientation
  2. Skim a recent paper: A Dual-Polarized Reconfigurable Reflectarray Antenna Based on Dual-Channel Programmable MetasurfaceInfluential work since 2022
  3. Pick up a classic book: Reflectarray antennasThe most-reprinted book on the subject
  4. Read the landmark paper: Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A ReviewCited 886 times
  5. Go sideways: Transmitarray antennaA closely related topic
  6. Go sideways: Reconfigurable antennaA closely related topic

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🗂️ The subject at a glance

  1. Phase distribution
  2. Unit cell considerations
  3. Other types of reflectarrays

🏆 Landmark papers (most cited)

🆕 Influential since 2022

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