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US 4,395,687 AGranted
Adjustable phase shifter
AssigneeRCA Corporation
InventorErwin F. Belohoubek
Life of this patent
Estimating the term…
Abstract
An adjustable phase shifter for adjustably providing a 360.degree. range of phase shift to RF signals by dividing the RF signals into three equal parts, adjusting the relative amplitudes of the parts of the RF signals and combining the three parts of the RF signals at relative phase angles of 0.degree., 120.degree. and 240.degree..
Claims7
A signal controlled radio frequency (RF) phase shifter comprising:
- divider means responsive to an RF input signal for power dividing said RF input signal into three power divided RF signals at substantially equal power levels;
- means comprising first, second and third circuits, respectively, each having an RF signal input terminal, a control signal terminal, and an output terminal, each circuit being receptive of a different one of said power divided RF signals at its input terminal for providing an RF signal at its output terminal at an amplitude which is a function of a parameter of a control signal applied to its control signal terminal;
- and
- means for combining the RF signals present at said output terminal of said first, second and third circuits at relative phases of 0.degree., 120.degree. and 240.degree., respectively, so that by adjustment of said parameter of the control signals applied to the respective control terminals of said first, second and third circuits the phase shift imparted to said RF input signal can be controlled through 360.degree..
1 more element
A signal controlled radio frequency phase shifter comprising:
- means responsive to an RF signal for dividing said RF signal into three substantially equal parts of relative phases of 0.degree., 60.degree. and 120.degree.;
- means comprising first, second and third circuits each having an RF input terminal receptive of a different one of said parts of said RF signal, an amplitude control signal terminal, and an output terminal, each said circuit providing an RF output at its output terminal of an amplitude which is a function of a parameter of a control signal applied to its control signal terminal;
- and
- means for combining the RF signals present at said output terminals of said first, second and third circuits at relative phases of 0.degree., 60.degree. and 120.degree., respectively, so that by adjustment of said parameters of the control signals applied to the respective control terminals of said first, second and third circuits, the phase imparted to said RF input signal can be controlled through 360.degree..
1 more element
Dependencies are inferred from the claim text.