Broadband parametric amplification with impedance engineering: Beyond the gain-bandwidth product
| Autor: | Roy, Tanay, Kundu, Suman, Chand, Madhavi, Vadiraj, A. M., Ranadive, A., Nehra, N., Patankar, Meghan P., Aumentado, J., Clerk, A. A., Vijay, R. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Appl. Phys. Lett. 107, 262601 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.4939148 |
| Popis: | 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 $\lambda/2$ 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 good agreement with our theoretical model. Comment: Updated: Main text (5 pages, 4 figures) and Supplementary Material (10 pages, 6 figures) |
| Databáze: | arXiv |
| Externí odkaz: |
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