Patent ID: 6198433
Filing Date: 2001-03-06
Classification: H01Q

Abstract:
An electronic scanning antenna comprising:an array of phase-shifters D.sub.ij, wherein N simultaneous beams are obtained in N independent directions by:(i) a law of excitation f.sub.ij applied to each phase-shifter D.sub.ij that is computed by summing phase laws .psi..sub.1, .psi..sub.2, . . . .psi..sub.k, . . . .psi..sub.N associated respectively with each 1, 2, . . . k, . . . N order direction according to the following relationship:f.sub.ij =e.sup.j.PSI..sup..sub.1 +e.sup.j.PSI..sup..sub.2 . . . +e.sup.j.PSI..sup..sub.k . . . +e.sup.j.PSI..sup..sub.N =.rho..sub.ij e.sup.j.PSI.t.sup..sub.ijand (ii) by applying a resultant phase-shift .psi.t.sub.ij to the phase-shifter, without applying a resultant amplitude modulation .rho..sub.ij.