A dispersion-engineered Josephson travelling wave parametric amplifier with periodic impedance perturbation
We present a new approach to develop a Josephson Junction Travelling Wave Parametric Amplifier (JTWPA) that could potentially minimise the gain-ripple effect. Our design consists of a 50 Ω superconducting niobium coplanar waveguide (CPW) periodically loaded with series of Josephson junctions (JJs) t...
| Main Authors: | , |
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| Format: | Conference item |
| Language: | English |
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National Radio Astronomy Observatory
2021
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| _version_ | 1826284618054107136 |
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| author | Ratter, K Tan, B-K |
| author_facet | Ratter, K Tan, B-K |
| author_sort | Ratter, K |
| collection | OXFORD |
| description | We present a new approach to develop a Josephson Junction Travelling Wave Parametric Amplifier (JTWPA) that could potentially minimise the gain-ripple effect. Our design consists of a 50 Ω superconducting niobium coplanar waveguide (CPW) periodically loaded with series of Josephson junctions (JJs) to provide the non-linearity required for wave mixing. The embedded JJs alter the characteristic impedance of the transmission line abruptly, therefore creating the stopbands in the transmission (S21) for the suppression of higher harmonics and provide the means for dispersion engineering required to achieve exponential gain. The simulated gain profile of the amplifier shows that we can obtain a minimum of 15 dB gain from 4–12 GHz, close to a 100% bandwidth performance. More importantly, the characteristic impedance of the main linear transmission line remains unaffected by the strong pump, therefore ensuring the TWPA remains impedance matched to the input and output ports. This can reduce the unwanted gain undulation that inflict the optimal performance of the TWPA. |
| first_indexed | 2024-03-07T01:16:32Z |
| format | Conference item |
| id | oxford-uuid:8ee1cbd9-6f9a-496a-9ee5-c9a87f6c741b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:16:32Z |
| publishDate | 2021 |
| publisher | National Radio Astronomy Observatory |
| record_format | dspace |
| spelling | oxford-uuid:8ee1cbd9-6f9a-496a-9ee5-c9a87f6c741b2022-03-26T23:00:37ZA dispersion-engineered Josephson travelling wave parametric amplifier with periodic impedance perturbationConference itemhttp://purl.org/coar/resource_type/c_5794uuid:8ee1cbd9-6f9a-496a-9ee5-c9a87f6c741bEnglishSymplectic ElementsNational Radio Astronomy Observatory2021Ratter, KTan, B-KWe present a new approach to develop a Josephson Junction Travelling Wave Parametric Amplifier (JTWPA) that could potentially minimise the gain-ripple effect. Our design consists of a 50 Ω superconducting niobium coplanar waveguide (CPW) periodically loaded with series of Josephson junctions (JJs) to provide the non-linearity required for wave mixing. The embedded JJs alter the characteristic impedance of the transmission line abruptly, therefore creating the stopbands in the transmission (S21) for the suppression of higher harmonics and provide the means for dispersion engineering required to achieve exponential gain. The simulated gain profile of the amplifier shows that we can obtain a minimum of 15 dB gain from 4–12 GHz, close to a 100% bandwidth performance. More importantly, the characteristic impedance of the main linear transmission line remains unaffected by the strong pump, therefore ensuring the TWPA remains impedance matched to the input and output ports. This can reduce the unwanted gain undulation that inflict the optimal performance of the TWPA. |
| spellingShingle | Ratter, K Tan, B-K A dispersion-engineered Josephson travelling wave parametric amplifier with periodic impedance perturbation |
| title | A dispersion-engineered Josephson travelling wave parametric amplifier with periodic impedance perturbation |
| title_full | A dispersion-engineered Josephson travelling wave parametric amplifier with periodic impedance perturbation |
| title_fullStr | A dispersion-engineered Josephson travelling wave parametric amplifier with periodic impedance perturbation |
| title_full_unstemmed | A dispersion-engineered Josephson travelling wave parametric amplifier with periodic impedance perturbation |
| title_short | A dispersion-engineered Josephson travelling wave parametric amplifier with periodic impedance perturbation |
| title_sort | dispersion engineered josephson travelling wave parametric amplifier with periodic impedance perturbation |
| work_keys_str_mv | AT ratterk adispersionengineeredjosephsontravellingwaveparametricamplifierwithperiodicimpedanceperturbation AT tanbk adispersionengineeredjosephsontravellingwaveparametricamplifierwithperiodicimpedanceperturbation AT ratterk dispersionengineeredjosephsontravellingwaveparametricamplifierwithperiodicimpedanceperturbation AT tanbk dispersionengineeredjosephsontravellingwaveparametricamplifierwithperiodicimpedanceperturbation |