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. |
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| 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 |
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