Abstract: There is disclosed a leaky-wave antenna device comprising a first metasurface comprising a first dielectric substrate having a first array of conductive elements and a second metasurface comprising a second dielectric substrate having a second array of conductive elements. The antenna device further comprises a conductive ground plane, a micro-actuator, and a feed comprising a pair of switchable dipoles. The first and second metasurfaces and the conductive ground plane are in a stacked arrangement and substantially parallel to one another, with the first metasurface located between the second metasurface and the conductive ground plane. A spacing between the conductive ground plane and the first metasurface is adjustable by operation of the micro-actuator. The feed is disposed between the first and second metasurfaces at a location corresponding to a centre of the first and second arrays.

Abstract: There is disclosed a reconfigurable metasurface device comprising a planar dielectric substrate and a two dimensional array of substantially planar conductive elements formed on or in the dielectric substrate. The two dimensional array of substantially planar conductive elements consists of alternating rows and columns of first and second substantially planar conductive elements, the first conductive elements each having a first shape with a first width and height, and the second conductive elements each having a second shape with a second width and height. The alternating rows and columns are offset with respect to each other such that centroids of the first shapes are disposed centrally between centroids of the second shapes of each adjacent row, and centroids of the first shapes of one column are disposed centrally between centroids of the second shapes in each adjacent column.

Abstract: There is disclosed a leaky-wave antenna device comprising a first metasurface comprising a first dielectric substrate having a first array of conductive elements and a second metasurface comprising a second dielectric substrate having a second array of conductive elements. The antenna device further comprises a conductive ground plane, a micro-actuator, and a feed comprising a pair of switchable dipoles. The first and second metasurfaces and the conductive ground plane are in a stacked arrangement and substantially parallel to one another, with the first metasurface located between the second metasurface and the conductive ground plane. A spacing between the conductive ground plane and the first metasurface is adjustable by operation of the micro-actuator. The feed is disposed between the first and second metasurfaces at a location corresponding to a centre of the first and second arrays.