Holey Metasurface Prism for the Reduction of the Dispersion of Gap Waveguide Leaky-Wave Antennas Articles uri icon

publication date

  • December 2019

start page

  • 2582

end page

  • 2586

issue

  • 12

volume

  • 18

International Standard Serial Number (ISSN)

  • 1536-1225

Electronic International Standard Serial Number (EISSN)

  • 1548-5757

abstract

  • Leaky-wave antennas are dispersive, meaning that the direction of maximum radiation is a function of frequency. This behavior, called "beam squinting effect" can be reduced by introducing a dispersive
    metamaterial prism. In this letter, a holey metasurface prism is
    combined with a leaky-wave antenna in gap waveguide technology. The
    dispersion characteristics of the hole unit cell are studied in order to
    achieve the reduction of the main beam steering aiming to
    $\pm 1^{\circ }$
    or less variation. A prototype designed at the
    Ka
    -band is measured and compared with the simulation results.

keywords

  • dispersive radiation pattern; groove gap waveguide; leaky-wave antenna; metasurface prism