Conference item
A dispersion-engineered Josephson travelling wave parametric amplifier with periodic impedance perturbation
- Abstract:
- 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
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- Files:
-
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(Preview, Accepted manuscript, 648.1KB, Terms of use)
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- Publication website:
- https://www.nrao.edu/meetings/isstt/2020.shtml
Authors
- Publisher:
- National Radio Astronomy Observatory
- Publication date:
- 2021-04-26
- Acceptance date:
- 2020-05-21
- Event title:
- 31st International Symposium on Space Terahertz Technology
- Event location:
- Tempe, Arizona, USA
- Event website:
- https://www.isstt2020.com/
- Event start date:
- 2020-03-08
- Event end date:
- 2020-03-11
- Language:
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English
- Keywords:
- Pubs id:
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1160374
- Local pid:
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pubs:1160374
- Deposit date:
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2021-02-09
Terms of use
- Copyright holder:
- Kitti Ratter and Boon-Kok Tan.
- Copyright date:
- 2021
- Rights statement:
- © The Authors 2021.
- Notes:
- This paper was presented at the 31st International Symposium on Space Terahertz Technology, 8-11 March 2020, Tempe, Arizona, USA. This is the accepted manuscript version of the article. The final version is available online from the National Radio Astronomy Observatory at: https://www.nrao.edu/meetings/isstt/2020.shtml
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