Patent ID: 7106269

Claim:
An omni-azimuthal pattern generator for an antenna system having two identical orthogonal antennas each of which has a dipole moment and a plurality of transmission lines comprising: a differential driver stage that isolates and unbalances a plurality of input signals from the two orthogonal antennas received through said plurality of transmission lines; an all-pass network stage joined to said differential driver stage that introduces a relative phase shift of ninety degrees in said plurality of unbalanced signals from said differential driver stage; a combiner stage joined to said all-pass network stage that combines the phase shifted plurality of signals from said all-pass network stage; and a drive stage joined to said combiner stage that receives the combined phase shifted plurality of signals from the combiner stage and provides a balanced output signal that is a combination of said input signals but that does not have a null along an axis between the two dipole moments of the two orthogonal antennas.