Patent ID: 7355560
Filing Date: 2008-04-08
Classification: H01Q

Abstract:
1. A design method of a dielectric lens having a front face on the radiator side of the dielectric lens and a rear face on the non-radiator side of the dielectric lens comprising: (a) determining a desired aperture distribution; (b) converting Snell's law at the rear face, electric power conservation law, and the formula representing light-path-length constraint, into simultaneous equations, and computing the shapes of the front face and rear face surfaces at the azimuthal angle θ of a primary ray from the focal point of the dielectric lens to the rear face of the dielectric lens; and (c) reducing the light path length in said formula showing light-path-length constraint by an integral multiple of the wavelength in the air when the coordinates on the surface of the dielectric lens reach a predetermined restriction thickness position; repeating (b) and (c) at least once; wherein said azimuthal angle θ of a primary ray is changed from its initial value.