Absorptive filters for quantum circuits: Efficient fabrication and cryogenic power handling
We present an efficient fabrication method for absorptive microwave filters based on Eccosorb CR-124. Filters are fabricated from readily available parts and their cut-off frequency can be set by their length. They exhibit desirable properties such as a very large and deep stop band with rejection b...
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| creator | Paquette, Alexandre Griesmar, Joël Lavoie, Gabriel Romain, Albert Blanchet, Florian Grimm, Alexander Martel, Ulrich Hofheinz, Max |
| description | We present an efficient fabrication method for absorptive microwave filters based on Eccosorb CR-124. Filters are fabricated from readily available parts and their cut-off frequency can be set by their length. They exhibit desirable properties such as a very large and deep stop band with rejection beyond 120 dB at least up to 40 GHz, more than 10 dB return loss in both the pass and the stop band as well as an error-function shaped step response without overshoot. Measurements at very low temperature show that the filters thermalize on a time scale of the order of 100 s and that they can absorb power as high as 100 nW with their noise temperature staying remarkably cool, below 100 mK. These properties make the filters ideal for cryogenic filtering and filtering of IF port signals of mixers. |
| doi_str_mv | 10.48550/arxiv.2202.11628 |
| format | Article |
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| subjects | Absorptivity Filtration Low temperature Microwave filters Mixers Noise temperature Physics - Applied Physics Step response |
| title | Absorptive filters for quantum circuits: Efficient fabrication and cryogenic power handling |
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