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

### publication date

• December 2019

• 2582

• 2586

• 12

• 18

• 1536-1225

• 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