Patent ID: 7667665

Claim:
A dual frequency radar system comprising: a first radar transmitter/receiver set which operates in a relatively lower frequency band; a second radar transmitter/receiver set which operates in a relatively higher frequency band; a spherical dielectric lens having a surface and a center; a first array of first feed points coupled with the first radar transmitter/receiver set, the first array of first feed points spaced about and on both sides of an axis through the center of the spherical dielectric lens; and a second array of second feed points coupled with the second radar transmitter/receiver set, the second array of second feed points centered on and spaced relatively tightly about the axis through the center of the spherical dielectric lens; the spherical dielectric lens forming relatively higher frequency beams that are relatively tightly spaced about the axis of the spherical dielectric lens and the spherical dielectric lens forming relatively lower frequency beams that are relatively farther spaced about the axis of the spherical dielectric lens than are the relatively higher frequency beams.