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This study demonstrates a novel modulated metasurface to reduce antenna coupling on satellites. Combining it with thermal insulation minimizes reflection, ensuring reliable satellite communications.

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Area of Science:

  • Electromagnetics
  • Satellite Engineering
  • Materials Science

Background:

  • Unwanted antenna coupling is a significant challenge in satellite design, potentially degrading performance.
  • Metasurfaces offer novel ways to manipulate electromagnetic waves, but their application in space environments requires specific adaptations.

Purpose of the Study:

  • To investigate the use of a modulated metasurface to control antenna coupling on satellites.
  • To integrate a metasurface with a Multi-Layer thermal Insulation (MLI) blanket to mitigate reflection.
  • To develop a lightweight and azimuthally independent metasurface for satellite applications.

Main Methods:

  • Designing a modulated metasurface using sub-wavelength radiating elements on a thin substrate.
  • Integrating the metasurface with an MLI blanket to achieve incoherent energy spreading and reduce specular reflection.
  • Performing simulations and experimental measurements to validate the metasurface design and performance.

Main Results:

  • The modulated metasurface effectively controls unwanted antenna coupling.
  • Integration with the MLI blanket successfully reduced specular reflection by spreading energy incoherently.
  • The sub-wavelength element design resulted in an azimuthally independent response and maintained a low blanket weight.

Conclusions:

  • The modulated metasurface concept is a viable solution for mitigating antenna coupling in satellite systems.
  • The combined metasurface-MLI approach offers a practical method for enhancing satellite communication reliability.
  • The design's azimuthal independence and low weight make it suitable for space deployment.