Microwave combiner and distributer for quantum signals using frequency-division multiplexing

Patent metadata

Field	Value
Publication number	US-10164724-B2
Application number	US-201615275511-A
Country	US
Kind code	B2
Filing date	Sep 26, 2016
Priority date	Sep 26, 2016
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A technique relates to a superconducting microwave combiner. A first filter through a last filter connects to a first input through a last input, respectively. The first filter through the last filter each has a first passband through a last passband, respectively, such that the first passband through the last passband are each different. A common output is connected to the first input through the last input via the first filter through the last filter.

First claim

What is claimed is:

1. A superconducting microwave combiner comprising:
a first filter through a last filter, wherein the first filter through the last filter connect to a first input through a last input, respectively, wherein the first filter through the last filter each has a first passband through a last passband, respectively, such that the first passband through the last passband are each different, wherein the first input through the last input do not connect to one another;
a common output connected to the first input through the last input via the first filter through the last filter, wherein the first filter through the last filter are superconducting, the first filter through the last filter including superconducting lumped elements;
wherein the first input through the last input include a first port through a last port, respectively, such that the first port through the last port are operatively connected to the first filter through the last filter, respectively;
wherein a first impedance transformer through a last impedance transformer are respectively connected in between the first port through the last port and the first filter through the last filter, such that one end of the first impedance transformer is connected to the first port and another end of the first impedance transformer is connected to the first filter;
a common impedance transformer connected between the first filter through the last filter and the common port, the common impedance transformer being configured to provide impedance matching, the common impedance transformer being directly coupled to the first filter through the last filter;
wherein the common impedance transformer is a single two pole element having two connection points within the superconducting microwave combiner.

2. The superconducting microwave combiner of claim 1 , wherein the first input through the last input are each isolated from one another, thereby avoiding signal leakage among the first input through the last input.

3. The superconducting microwave combiner of claim 1 , wherein the first filter through the last filter are each configured to transmit signals at a different set of frequencies; and
wherein the first filter through the last filter are each passive thereby requiring no operational power to operate as passive filters.

4. The superconducting microwave combiner of claim 3 , wherein:
the first filter of the first filter through the last filter is configured to only pass the signals at a first set of frequencies,
a next filter of the first filter through the last filter is configured to only pass the signals at a next set of frequencies, and
the last filter of the first filter through the last filter is configured to only pass the signals at a last set of frequencies, each of the first set, the next set, and the last set of frequencies being non-overlapping.

5. The superconducting microwave combiner of claim 1 ,
wherein the first port through the last port are operatively connected to the first filter through the last filter, respectively, such that a first through last signals respectively input through the first port through the last port are to be combined and output through a common port.

6. The superconducting microwave combiner of claim 1 , wherein the first impedance transformer through the last impedance transformer are configured to provide impedance matching.

7. The superconducting microwave combiner of claim 1 , wherein the first filter through the last filter comprise superconducting materials.

8. A method of configuring a superconducting microwave combiner, the method comprising:
providing a first filter through a last filter, wherein the first filter through the last filter connect to a first input through a last input, respectively, wherein the first filter through the last filter each has a first passband through a last passband, respectively, such that the first passband through the last passband are each different, wherein the first input through the last input do not connect to one another; and
providing a common output connected to the first input through the last input via the first filter through the last filter, wherein the first filter through the last filter are superconducting, the first filter through the last filter including superconducting lumped elements;
wherein the first input through the last input include a first port through a last port, respectively, such that the first port through the last port are operatively connected to the first filter through the last filter, respectively;
wherein a first impedance transformer through a last impedance transformer are respectively connected in between the first port through the last port and the first filter through the last filter, such that one end of the first impedance transformer is connected to the first port and another end of the first impedance transformer is connected to the first filter;
connecting a common impedance transformer between the first filter through the last filter and the common port, the common impedance transformer being configured to provide impedance matching, the common impedance transformer being directly coupled to the first filter through the last filter;
wherein the common impedance transformer is a single two pole element having two connection points within the superconducting microwave combiner.

9. The method of claim 8 , wherein the first input through the last input are each isolated from one another, thereby avoiding signal leakage among the first input through the last input.

10. The method of claim 8 , wherein the first filter through the last filter are each configured to transmit signals at a different set of frequencies; and
wherein the first filter through the last filter are each passive thereby requiring no operational power to operate as passive filters.

11. The method of claim 10 , wherein:
the first filter of the first filter through the last filter is configured to only pass the signals at a first set of frequencies,
a next filter of the first filter through the last filter is configured to only pass the signals at a next set of frequencies, and
the last filter of the first filter through the last filter is configured to only pass the signals at a last set of frequencies, each of the first set, the next set, and the last set of frequencies being non-overlapping.

12. The method of claim 8 ,
wherein the first port through the last port are operatively connected to the first filter through the last filter, respectively, such that a first through last signals respectively input through the first port through the last port are to be combined and output through a common port.

13. The method of claim 8 , wherein the first filter through the last filter includes superconducting materials.

14. A superconducting microwave distributer comprising:
a first filter through a last filter, wherein the first filter through the last filter connect to a first output through a last output, respectively, wherein the first filter through the last filter has a first passband through a last passband, respectively, such that the first passband through the last passband are each different;
a common input connected to the first output through the last output via the first filter through the last filter, wherein the first filter through the last filter are superconducting, the first filter through the last filter including superconducting lumped elements;
wherein the first input through the last input include a first port through a last port, respectively, such that the first port through the last port are operatively connected to the first filter thr

Assignees

• IBM

Inventors

• Abdo Baleegh

Classifications

• H01P1/213 Primary

  combining or separating two or more different frequencies (H01P1/215 takes precedence) · CPC title

• H01P5/12

  Coupling devices having more than two ports (H01P5/04 takes precedence) · CPC title

• H03H7/46 Primary

  Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source · CPC title

• H04J1/08 Primary

  Arrangements for combining channels {(branching filters H01P1/213, H03H7/46)} · CPC title

• H10N60/00

  Superconducting devices (integrated devices or assemblies of multiple devices H10N69/00) · CPC title