Cryogenic parametric amplifier control apparatus
AssigneeMillimeter Wave Systems, LLC
InventorsChristopher Tze-Chao Koh, Kenneth Ray Wood
Life of this patent
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Abstract
A cryogenic parametric amplifier control apparatus is disclosed. Methods of implementation and devices incorporated within the whole of the apparatus are disclosed. Methods of reducing the number of signal lines necessary to control a parametric amplifier are disclosed. Schema allowing for control of multiple parametric amplifiers with a single apparatus are disclosed.
Claims11
A method of multiplexing outputs of two or more cryogenic amplifiers housed within a cryogenic system, the method comprising:
- disposing a power divider/combiner onto a cooling stage, the cooling stage-operating at a lower temperature than room temperature;
- coupling respective ones of the two or more outputs to corresponding input ports of the power divider/combiner, to thereby reduce a number of connections through at least one stage of the cryogenic system;
- combining a test signal with one or more pump signals fed to the cryogenic amplifiers;
- monitoring the test signal at one or more outputs of the cryogenic amplifiers;
- and
- wherein the monitoring further comprises detecting the test signal via a microwave detector or homodyne receiver, or by selectively enabling a DC bias to one or more of the cryogenic amplifiers.
A method of multiplexing outputs of two or more cryogenic amplifiers housed within a cryogenic system, the method comprising:
- disposing a power divider/combiner onto a cooling stage, the cooling stage-operating at a lower temperature than room temperature;
- coupling respective ones of the two or more outputs to corresponding input ports of the power divider/combiner, to thereby reduce a number of connections through at least one stage of the cryogenic system;
- combining, with the power divider/combiner, output signals from two or more of the cryogenic amplifiers to generate a single combined output signal;
- and
- routing the combined output signal away from the cooling stage along a transmission path toward room-temperature electronics, thereby decreasing a number of signal lines that traverse the cooling stage.
A method of multiplexing outputs of two or more cryogenic amplifiers housed within a cryogenic system, the method comprising:
- disposing a power divider/combiner onto a cooling stage, the cooling stage-operating at a lower temperature than room temperature;
- coupling respective ones of the two or more outputs to corresponding input ports of the power divider/combiner, to thereby reduce a number of connections through at least one stage of the cryogenic system;
- and
- disposing a cryogenic isolator or circulator between each amplifier output and the corresponding input port of the power divider/combiner.
A method of multiplexing outputs of two or more cryogenic amplifiers housed within a cryogenic system, the method comprising:
- disposing a power divider/combiner onto a cooling stage, the cooling stage operating at a lower temperature than room temperature;
- coupling respective ones of the two or more outputs to corresponding input ports of the power divider/combiner, to thereby reduce a number of connections through at least one stage of the cryogenic system;
- providing a test signal tone into at least one input port of the power divider/combiner;
- and
- monitoring the test signal at the combined output to characterize the cryogenic system.
Dependencies are inferred from the claim text.