Roy, Tanay ; Kundu, Suman ; Chand, Madhavi ; Vadiraj, A. M. ; Ranadive, A. ; Nehra, N. ; Patankar, Meghan P. ; Aumentado, J. ; Clerk, A. A. ; Vijay, R. (2015) Broadband parametric amplification with impedance engineering: Beyond the gain-bandwidth product Applied Physics Letters, 107 (26). ISSN 0003-6951
Full text not available from this repository.
Official URL: https://doi.org/10.1063/1.4939148
Related URL: http://dx.doi.org/10.1063/1.4939148
Abstract
We present an impedance engineered Josephson parametric amplifier capable of providing bandwidth beyond the traditional gain-bandwidth product. We achieve this by introducing a positive linear slope in the imaginary component of the input impedance seen by the Josephson oscillator using a λ/2 transformer. Our theoretical model predicts an extremely flat gain profile with a bandwidth enhancement proportional to the square root of amplitude gain. We experimentally demonstrate a nearly flat 20 dB gain over a 640 MHz band, along with a mean 1-dB compression point of −110 dBm and near quantum-limited noise. The results are in a good agreement with our theoretical model.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| ID Code: | 139242 |
| Deposited On: | 21 Aug 2025 10:18 |
| Last Modified: | 21 Aug 2025 10:18 |
Repository Staff Only: item control page
