Patent ID: 9170348
Filing Date: 2015-10-27
Classification: G02B,H01Q

Abstract:
1. A beamforming apparatus comprising: a plurality of N an annular shaped lens encircling the plurality of N n(r) where r is the distance from the lens geometrical axis of symmetry; a plurality of N a plurality of N a plurality of N in which: a. the plurality of N b. the plurality of N c. the plurality of N d. the annular shaped lens is situated on the z=0 plane of a cylindrical coordinate system CS(r,φ,z) such that its geometrical axis of symmetry aligns with the z axis, and a first beam port of the number of beam ports N e. the members of the plurality of N f. the members of the plurality of N g. the plurality of N h. the members of the plurality of N i. a first end of each member i of the plurality of N j. a second end of each member i of the plurality of N k. the refractive index for the material making the annular lens at any point (r,φ,z) is given by a real valued function n(r), where n(r) is chosen such that the optical path lengths for a number of N are equal within a small fraction of the free space wavelength at the frequency of operation.