A wide band antenna tracking modulator and method is disclosed. The system includes a common port for receiving an electromagnetic signal, a waveguide connected to the common port, at least a pair of side arms and a pair of coupling slots separated along an axis of the waveguide coupling the electromagnetic signals between the waveguide and the pair of side arms. The pair of coupling slots substantially coupled a higher order TE mode signal while substantially not coupling a primary TE mode signal. The method includes substantially coupling a higher order Transverse Electric (TE) mode signal of the electromagnetic signal while substantially not coupling a primary TE mode signal of the electromagnetic signal to at least a pair of side arms coupled to the wave guide though a pair of coupling slots separated along the axis of the waveguide.