FAST SETTLING, WIDE DYNAMIC RANGE VECTOR MODULATOR

Abstract

A fast settling, wide dynamic range vector modulator for use in an interference cancellation system or the like includes a quadrature hybrid which receives an RF signal and divides the signal into a primary in-phase component signal and a primary quadrature phase component signal. A first 180° hybrid receives the primary in-phase component signal and provides first and second secondary in-phase component signals which are 180° out of phase with each other. A second 180° hybrid receives the primary quadrature phase component signal and provides first and second secondary quadrature phase component signals which are 180° out of phase with each other. A first switching device selects one of the first and second secondary in-phase component signals, and a second switching device selects one of the first and second secondary quadrature phase component signals. First and second coarse attenuators respectively provide a selectable amount of attenuation to the selected in-phase and quadrature phase component signals. First and second fine attenuators provide fine attenuation to the coarse attenuated in-phase and quadrature phase component signals. A signal combiner combines the fine attenuated in-phase and quadrature phase component signals to provide the corresponding output signal.

Source: Google Patents

35 USC §181 Secrecy Order

Inventor

• 1JOHN P. KOZAK