Driving the common-mode of a josephson parametric converter using a three-port power divider
AssigneeInternational Business Machines Corporation
InventorBaleegh Abdo
Life of this patent
Estimating the term…
Abstract
An on-chip Josephson parametric converter is provided. The on-chip Josephson parametric converter includes a Josephson ring modulator. The on-chip Josephson parametric converter further includes a lossless power divider, coupled to the Josephson ring modulator, having a single input port and two output ports for receiving a pump drive signal via the single input port, splitting the pump drive signal symmetrically into two signals that are equal in amplitude and phase, and outputting each of the two signals from a respective one of the two output ports. The pump drive signal excites a common mode of the on-chip Josephson parametric converter.
Claims18
An on-chip Josephson parametric converter, comprising:
- a Josephson ring modulator;
- and
- a lossless power divider, coupled to the Josephson ring modulator, having a single input port and two output ports for receiving a pump drive signal via the single input port, splitting the pump drive signal symmetrically into two signals that are equal in amplitude and phase, and outputting each of the two signals from a respective one of the two output ports,
- wherein the pump drive signal excites a common mode of the on-chip Josephson parametric converter, and
- wherein the lossless power divider comprises at least one microwave filter for at least mitigating any signal leakage from the on-chip Josephson parametric converter through the lossless power divider.
A method, comprising:
- forming an on-chip Josephson parametric converter, wherein said forming step includes:
- forming a Josephson ring modulator;
- and
- forming a lossless power divider, capacitively coupled to the Josephson ring modulator, having a single input port and two output ports for receiving a pump drive signal via the single input port, splitting the pump drive signal symmetrically into two equal phase signals, and outputting each of the two equal phase signals from a respective one of the two output ports,
- wherein the pump drive signal excites a third mode that is a common mode of the on-chip Josephson parametric converter, and
- wherein the lossless power divider is formed to include at least one microwave filter for at least mitigating any signal leakage from the on-chip Josephson parametric converter through the lossless power divider.
Dependencies are inferred from the claim text.