A new technique to measure noise parameters for global 21-cm experiments
Autor: | Price, Danny C., Tong, Cheuk-Yu Edward, Sutinjo, Adrian T., Patra, Nipanjana, Greenhill, Lincoln J. |
---|---|
Rok vydání: | 2023 |
Předmět: | |
Druh dokumentu: | Working Paper |
Popis: | Radiometer experiments to detect 21-cm Hydrogen line emission from the Cosmic Dawn and Epoch of Reionization rely upon precise absolute calibration. During calibration, noise generated by amplifiers within the radiometer receiver must be accounted for; however, it is difficult to measure as the noise power varies with source impedance. In this letter, we introduce a convenient method to measure the noise parameters of a receiver system, which is practical for low-frequency receivers used in global 21-cm experiments. Comment: 4 pages, accepted paper for URSI GASS 2023 J08 |
Databáze: | arXiv |
Externí odkaz: |