Citation
Abstract
This article presents tutorial discussions of available and delivered system noise temperatures as well as antenna e–ciency and how mismatch errors afiect the expected values. Derivation of the mismatch error equations begins with fundamental considerations, and subsequent steps are purposely presented in detail. Mismatch errors are shown to be functions of the voltage reflection coe–cients of the ambient load, antenna, and receiver. The errors can also be functions of the receiver correlation coe–cient. Plots are presented showing how each of these coe–cients afiects deviations of the true operating-system noise-temperature values from the assumed matched-case values for a typical DSN receiving system at 8.45 GHz (X-band).
Keywords
noise temperature calibration
mismatch factor
antenna system noise temperature
receiver noise temperature
antenna noise temperature
available noise temperature
delivered noise temperature
ambient load
Details
- Volume
- 42-148
- Published
- February 15, 2002
- Pages
- 1–31
- File Size
- 363.7 KB