Peripheral circuits for ideal performance of a traveling-wave parametric amplifier
Artikel i vetenskaplig tidskrift, 2024

We investigate the peripheral circuits required to enable ideal performance for a high-gain traveling-wave parametric amplifier (TWPA) based on three-wave mixing. By embedding the TWPA in a network of superconducting diplexers, hybrid couplers, and impedance matching networks, the amplifier can deliver a high stable gain with near-quantum-limited noise performance, with suppressed gain ripples, while eliminating the reflections of the signal, the idler and the pump as well as the transmission of all unwanted tones. We also demonstrate a configuration where the amplifier can isolate. We call this technique wideband idler filtering (WIF). The theory is supported by simulations that predict over 20 dB gain in the 4-8 GHz band with 10 dB isolation for a single amplifier and 30 dB isolation for two cascaded amplifiers. We demonstrate how the WIF-TWPAs can be used to construct controllable isolators with over 40 dB isolation over the full 4-8 GHz band. Finally, we look at nonidealities and show how certain nonidealities can be devastating for both the gain and the idler filtering, especially a cutoff imbalance or a flux imbalance, and discuss how to compensate for them.

Författare

Hampus Renberg Nilsson

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

Daryoush Shiri

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

Robert Rehammar

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

Anita Fadavi Roudsari

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

Per Delsing

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

Physical Review Applied

2331-7019 (eISSN)

Vol. 21 6 064062

Ämneskategorier

Telekommunikation

Annan fysik

Reglerteknik

DOI

10.1103/PhysRevApplied.21.064062

Mer information

Senast uppdaterat

2024-07-25