Abstract
A wideband cryogenic amplifier used for SNSPD redou-out system is designed in this paper. Packaged SiGe HBT BFU725F/N1 which could be operated in 4K temperature is utilized as the key component of this amplifier. The simulation results show that the noise figure is less than 1 dB over 100kHz to 1 GHz frequency range, the gain is about 20 dB and the gain flatness is less than 1 dB, the reflection coefficients are less than -10 dB. This wideband cryogenic amplifier could be integrated directly with SNSPD to improve the performance of SNSPD read-out system.
| Original language | English |
|---|---|
| Title of host publication | 2025 International Conference on Microwave and Millimeter Wave Technology, ICMMT 2025 - Proceedings |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Edition | 2025 |
| ISBN (Electronic) | 9798331525736 |
| DOIs | |
| Publication status | Published - 2025 |
| Externally published | Yes |
| Event | 16th International Conference on Microwave and Millimeter Wave Technology, ICMMT 2025 - Xi�an, China Duration: 19 May 2025 → 22 May 2025 |
Conference
| Conference | 16th International Conference on Microwave and Millimeter Wave Technology, ICMMT 2025 |
|---|---|
| Country/Territory | China |
| City | Xi�an |
| Period | 19/05/25 → 22/05/25 |
Keywords
- cryogenic amplifier
- SiGe HBT
- superconducting nanowire single-photon detec-tor
- wideband
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