Systems and methods for phase shifting signals
First Claim
Patent Images
1. A phase shifter, comprising:
- a quadrature hybrid coupler (QHC) that includes an input port, an output port, and two terminated ports;
one or more static lumped elements connected to the QHC, wherein an inclusion of the one or more static lumped elements with the QHC sets at least one electrical dimension of the QHC at substantially less than a quarter wavelength of an operating frequency of the QHC; and
one or more variable lumped elements connected to the QHC and configured to provide a variable phase shift between the input port and the output port.
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Abstract
According to various embodiments, a quadrature hybrid coupler included as part of a phase shifter is used to provide variable phase shift to an input signal. The quadrature hybrid coupler includes an input port, an output port, and two terminated ports. The phase shifter includes one or more static lumped elements connected to the QHC to reduce at least one electrical dimension of the QHC to substantially less than a quarter wavelength. The phase shifter also include one or more variable lumped elements connected to the QHC to provide a variable phase shift to the input signal between the input port and the output port of the QHC.
17 Citations
43 Claims
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1. A phase shifter, comprising:
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a quadrature hybrid coupler (QHC) that includes an input port, an output port, and two terminated ports; one or more static lumped elements connected to the QHC, wherein an inclusion of the one or more static lumped elements with the QHC sets at least one electrical dimension of the QHC at substantially less than a quarter wavelength of an operating frequency of the QHC; and one or more variable lumped elements connected to the QHC and configured to provide a variable phase shift between the input port and the output port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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receiving a signal at an input port of a quadrature hybrid coupler (QHC) included as part of a phase shifter, the QHC including an output port, and two terminated ports, the phase shifter including; one or more static lumped elements connected to the QHC, wherein an inclusion of the one or more static lumped elements with the QHC sets at least one electrical dimension of the QHC at substantially less than a quarter wavelength of a frequency of the signal; and one or more variable lumped elements connected to the QHC and configured to provide a variable phase shift to signals including the signal between the input port and the output port; and adjusting the variable phase shift between the input port and the output port using the one or more variable lumped elements as part of controlling the phase shifter. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A system comprising:
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an array of phase shifters comprising a plurality of quadrature hybrid couplers (QHCs) that each include an input port, an output port, and two terminated ports, one or more static lumped elements connected to the QHCs, and one or more variable lumped elements connected to the QHCs and configured to provide variable phase shifts between the input ports and the output ports, wherein an inclusion of the one or more static lumped elements with each of the QHCs sets at least one electrical dimension of each of the QHCs at substantially less than a quarter wavelength of an operating frequency of the QHC; and a controller for controlling the array of phase shifters by controlling the variable phase shifts of the array of phase shifters. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification