Patent ID: 8830129

Claim:
A dielectric artificial impedance surface antenna (DAISA) comprising: a dielectric having a thickness, the thickness of the dielectric varying to provide a modulated impedance to a signal traversing the dielectric; the dielectric having a first surface on the dielectric, and a second surface on the dielectric opposite the first surface; wherein the modulated impedance to a signal traversing the dielectric varies according to Z sw ( x,y )= X+M cos((2πf 0 /c )*( nr - x sin θ 0 )) where x is a dimension along the first surface, y is another dimension along the first surface, X is an average impedance, M is a maximum surface wave impedance modulation, f 0 is a design frequency of radiation, n =(1+X 2 ) 1/2 , c is a speed of light, r is a radial distance from a feed point at x=0, y=0, to a distance to dimensions x, y, and θ 0 is an design angle of radiation.