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Electromagnetic Reconfiguration Using Stretchable Mechanical Metamaterials.

Maria Sakovsky1, Jan Negele1, Joseph Costantine2

  • 1Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 21, Zurich, 8092, Switzerland.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 4, 2023
PubMed
Summary
This summary is machine-generated.

Mechanical metamaterials enable stretchable antennas for reconfigurable communication systems. This innovation allows antennas to maintain performance under strain, crucial for wearable electronics and aerospace applications.

Keywords:
aerospace structuresfunctional materialsstretchable antennaswearable electronics

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Area of Science:

  • Electromagnetics
  • Materials Science
  • Mechanical Engineering

Background:

  • Agile communication systems require reconfigurable electromagnetic structures for applications like wearable electronics and aerospace.
  • Current stretchable conductor technologies for antenna reconfiguration are limited by soft substrate high-strain requirements.

Purpose of the Study:

  • To demonstrate the use of mechanical metamaterials for stretchable conductors and dielectrics in antennas.
  • To enable on-demand antenna performance reconfiguration while preserving radiation characteristics.

Main Methods:

  • Utilized mechanical metamaterials to create stretchable conductors and dielectrics for antenna applications.
  • Investigated conductor stretching up to 30% across a range of substrate tensile moduli (26 MPa to 44 GPa).
  • Designed and tested several antenna configurations incorporating metamaterial elements.

Main Results:

  • Mechanical metamaterials achieved conductor stretching up to 30%.
  • Metamaterial-based antennas exhibited frequency reduction upon stretching, comparable to monolithic conductors.
  • Demonstrated a miniaturization effect alongside frequency tuning.
  • Showcased control over the coupling between mechanical stretching and electromagnetic reconfiguration via conductor patterning.

Conclusions:

  • Mechanical metamaterials offer a viable solution for creating stretchable antennas with tunable electromagnetic properties.
  • This approach enhances antenna reconfigurability for diverse applications, including body-adapted electronics and space vehicles.
  • Metamaterial geometry provides a design pathway for tailoring antenna functionality in response to application-specific needs.