| 主权项 |
1. 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
Zsw(x,y)=X+M cos((2πf0/c)*(nr-xsin θ0))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,f0 is a design frequency of radiation,n =(1+X2)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, andθ0 is an design angle of radiation. |
