公开(公告)号：US20220094320A1

公开(公告)日：2022-03-24

申请号：US17424983

申请日：2020-01-08

Applicant: Teknologian tutkimuskeskus VTT Oy

Inventor： Visa Vesterinen ,  Juha Hassel

IPC: H03F19/00 ,  H01P3/00 ,  H03F7/00 ,  H01L39/24 ,  H01L39/22

Abstract: According to an example aspect of the present invention, there is provided a travelling wave parametric amplifier comprising a waveguide transmission line comprising therein at least ten Josephson elements, wherein each of the at least ten Josephson element comprises a loop, with exactly one Josephson junction of first size on one half of the loop and at least two Josephson junctions of a second size on a second half of the loop, the second size being larger than the first size, a flux bias line configured to generate a magnetic flux threading each of the at least one loop, and a set of resistors coupled with the flux bias line.

公开(公告)号：US11515851B2

公开(公告)日：2022-11-29

申请号：US17424983

申请日：2020-01-08

Applicant: Teknologian tutkimuskeskus VTT OY

Inventor： Visa Vesterinen ,  Juha Hassel

IPC: H03F19/00 ,  H01L39/22 ,  H01L39/24 ,  H01P3/00 ,  H03F7/00 ,  H03F7/04 ,  H03G3/00

Abstract: According to an example aspect of the present invention, there is provided a travelling wave parametric amplifier comprising a waveguide transmission line comprising therein at least ten Josephson elements, wherein each of the at least ten Josephson element comprises a loop, with exactly one Josephson junction of first size on one half of the loop and at least two Josephson junctions of a second size on a second half of the loop, the second size being larger than the first size, a flux bias line configured to generate a magnetic flux threading each of the at least one loop, and a set of resistors coupled with the flux bias line.

公开(公告)号：US11143557B2

公开(公告)日：2021-10-12

申请号：US16468851

申请日：2017-12-13

Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTT OY

Inventor： Juha Hassel ,  Hannu Sipola ,  Andrey Timofeev ,  Visa Vesterinen

IPC: G01J5/10

Abstract: A solution for reading detector arrays is disclosed. The solution comprises generating (400) an excitation signal, varying (402) the frequency of the excitation signal in time, supplying (404) the excitation signal to a detector array comprising a set of thermal detectors. The number of detectors corresponds to the frequencies of the excitation signal. In the solution, the signal is demodulated (406) at the output of the detector array and time-multiplexed base band signal is obtained. An analogue to digital conversion is performed (408) to the time-multiplexed base band signal and the base band signal is demultiplexed (410) to obtain a set of detector signals.

公开(公告)号：US20230163737A1

公开(公告)日：2023-05-25

申请号：US17919351

申请日：2021-04-19

Applicant: Teknologian tutkimuskeskus VTT Oy

Inventor： Visa Vesterinen ,  Slawomir Simbierowicz

IPC: H03F19/00 ,  H01P3/00

CPC classification number: H03F19/00 ,  H01P3/003

Abstract: According to an example aspect of the present invention, there is provided a travelling wave parametric amplifier comprising a transmission line comprising therein a plurality of Josephson elements and a plurality of shunt capacitors, and wherein at least some of the shunt capacitors are dispersive capacitors comprising an open-ended, distributed transmission line.