Patent ID: 6016304
Filing Date: 2000-01-18
Classification: H01P,H03C

Abstract:
An RF control device for controlling the amplitude and phase of an RF input signal, comprising, in combination:first power divider means for power dividing the RF input signal to provide first and second power divided signals;amplitude control means coupled to said first power divider means for separately controlling the amplitude of said first and second power divided signals;second power divider means coupled to said amplitude control means and responsive to said first power divided signal for providing third and fourth power divided signals of opposite phase;third power divider means coupled to said amplitude control means and responsive to said second power divided signal for providing fifth and sixth power divided signals of opposite phase;switch means coupled to said second and third power divider means for selectively providing one of said third and fourth power divided signals at a first switch output and one of said fifth and sixth power divided signals at a second switch output;quadrature combiner means coupled to said first and second switch outputs for combining signals from said first and second switch outputs at phase quadrature to obtain an output signal, whereby the amplitude and phase of the output signal are dependent on the selective position of the switch means and the relative amplitudes of the third, fourth, fifth and sixth power divided signals; anddigital control means for effecting open loop control of said amplitude control means and said switch means in response to a desired amplitude and phase control for the input signal, by supplying to said amplitude control means and said switch means predetermined digital control information which corresponds to the desired amplitude and phase control for the input signal.