Microwave antennas based on metamaterials and metasurfaces

Microwave antennas based on metamaterials and metasurfaces

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In this chapter, we focus on introducing the microwave MTM antennas and their practical applications. We demonstrate the design, realization, and measurement of several types of MTM antennas. Generally, they are categorized into two groups: the flat or curved gradient-refractive-index (GRIN) lens antennas composed of isotropic or anisotropic MTMs, and the transformation optics (TO)-based lens antennas which have distinct performances and novel functions compared with traditional antennas. In the end of the chapter, we also give a brief introduction of metasurfaces, the two-dimensional (2D) version of MTMs, and introduce some important and latest applications of metasurfaces for antenna engineering.

Chapter Contents:

  • 11.1 GRIN MTM lens antennas
  • 11.1.1 MTM flat lens antenna
  • High-gain flat lens
  • High-gain and low-sidelobe flat lens
  • Loading-inside flat lens
  • Anisotropic flat lens
  • 11.1.2 MTM curved lens antennas
  • Luneburg lens
  • Fish-eye lens
  • 11.2 MTM antennas using transformation optics
  • 11.2.1 MTM flattened reflectors
  • 11.2.2 MTM flattened convex and hyperbolic lenses
  • 11.2.3 MTM Luneburg lens with flattened focal surface
  • 11.3 Metasurface antennas
  • 11.3.1 Holographic metasurfaces for beam scanning
  • 11.3.2 Spoof SPP radiations
  • 11.3.3 Coding metasurfaces
  • References

Inspec keywords: gradient index optics; lens antennas; microwave antennas; metamaterial antennas

Other keywords: antennas design; isotropic MTMs; transformation optics-based lens antennas; GRIN lens antennas; microwave MTM antennas; flat gradient-refractive-index lens antennas; metasurfaces; antennas measurement; curved gradient-refractive-index lens antennas; metamaterials; anisotropic MTMs

Subjects: Single antennas

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