A filter arrangement for quantum processors
AssigneeSweden Quantum AB
InventorsRobert REHAMMAR, Simone GASPARINETTI
Life of this patent
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Abstract
A filter arrangement (100) for a quantum processor. The filter arrangement comprises a waveguiding structure (110) arranged to guide electromagnetic waves along a main waveguiding path (111) between a first port (112) and a second port (113). The waveguiding structure (110) comprises a frequency-selective surface, FSS, (120) arranged along at least a part of the main waveguiding path (111). The FSS is arranged to be electromagnetically reflective for a low-frequency band and arranged to be electromagnetically transparent in a direction away from the main waveguiding path (111) at a high-frequency band.
Claims23
A filter arrangement (100) for a quantum processor, comprising a waveguiding structure (110) arranged to guide electromagnetic waves along a main waveguiding path (111) between a first port (112) and a second port (113),
- wherein the waveguiding structure (110) comprises a frequency-selective surface, FSS, (120) arranged along at least a part of the main waveguiding path (111), wherein the FSS is arranged to be electromagnetically reflective for a low-frequency band below 10 GHz and arranged to be electromagnetically transparent in a direction away from the main waveguiding path (111) at a high-frequency band above 20 GHZ,
- wherein the FSS (120) comprises a plurality of waveguide apertures (121) arranged along the waveguiding structure (110), wherein each aperture is arranged to guide electromagnetic waves above a respective lower cutoff frequency along a respective aperture waveguiding path (122) away from the main waveguiding path (111), and
- wherein the waveguiding structure (110) is a coaxial line comprising an inner conductor (131) and an outer conductor (132), wherein the FSS (120) is arranged on the outer conductor and/or on the inner conductor (131).
A filter arrangement (100) for a quantum processor, comprising a waveguiding structure (110) arranged to guide electromagnetic waves along a main waveguiding path (111) between a first port (112) and a second port (113),
- wherein the waveguiding structure (110) comprises a frequency-selective surface, FSS, (120) arranged along at least a part of the main waveguiding path (111), wherein the FSS is arranged to be electromagnetically reflective for a low-frequency band and arranged to be electromagnetically transparent in a direction away from the main waveguiding path (111) at a high-frequency band,
- wherein the FSS (120) comprises a plurality of waveguide apertures (121) arranged along the waveguiding structure (110), and wherein each aperture is arranged to guide electromagnetic waves above a respective lower cutoff frequency along a respective aperture waveguiding path (122) away from the main waveguiding path (111),
- wherein the waveguiding structure (110) is a planar transmission line comprising a conductive strip (731) and a ground plane (732), wherein the FSS (120) is arranged on the conductive strip and/or the ground plane, and
- wherein the length of at least one aperture waveguiding path (122) corresponds to at least 0.05 wavelengths of a corresponding lower cutoff frequency of the waveguide aperture.
Dependencies are inferred from the claim text.