Water-Based Microwave Reflectarrays

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Control of transmission/reflection of waves continues to be a task of great importance. Especially, 2-D structures such as metasurfaces, with imprinted spatial phase variation coming from arrays of small metallic/dielectric scatterers, are of increasing interest for microwave as well as optical frequencies. In this work, we demonstrate alternative and simple metasurface reflectarrays based on distilled water. The reflectarrays are composed of water-filled cylinders which are operated around their magnetic dipole resonance. The cylinders reside in a Rohacell 51HF host, and their size varies in order to span a 360o interval in the reflection phase. They reflect a normally incident plane wave at an angle of 51.34°. The numerical results predict a total reflected power of 36.9% with the reflection in the desired direction being more than 13 times larger than the reflections in other directions. A prototype was fabricated, with the measurements being in excellent agreement with the numerical results.
Original languageEnglish
Title of host publicationProceedings of 14th European Conference on Antennas and Propagation
Number of pages3
Publication statusAccepted/In press - 2021
Event14th European Conference on Antennas and Propagation - Virtual event, Copenhagen, Denmark
Duration: 15 Mar 202020 Mar 2020


Conference14th European Conference on Antennas and Propagation
LocationVirtual event
Internet address


  • Reflectarray
  • Metasurface
  • Water-based

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