English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Radiometer experiments to detect 21-cm Hydrogen line emission from the CosmicDawn and Epoch of Reionization rely upon precise absolute calibration. Duringcalibration, noise generated by amplifiers within the radiometer receiver mustbe accounted for; however, it is difficult to measure as the noise power varieswith source impedance. In this letter, we introduce a convenient method tomeasure the noise parameters of a receiver system, which is practical forlow-frequency receivers used in global 21-cm experiments.

A new technique to measure noise parameters for global 21-cm experiments