Confidently predict receiver system noise temperature using the techniques developed for NASA-JPL's Deep Space Network techniques presented, for the first time, in this groundbreaking resource. The book shows you how to analyze, design, measure and accurately evaluate the many detailed elements comprising noise temperature. After a thorough introductory overview, you delve into reflector performance issues, including material conductivity, perforations, protective coatings, the effects of terrestrial weather, and the influence of the Earth's Sun. This in-depth reference covers mismatch error equations, in terms of both reflection coefficient magnitudes and VSWRs. Moreover, you find expert guidance in calibrating system noise temperature and antenna efficiency. The book includes easy-to-use formulas that enable you to calculate noise temperature of solid metallic reflector surfaces and of leaks in perforated plates or wire grids. What's more, you get an invaluable tutorial on using S- parameters to predict noise temperature of multiports.
Table Of Contents
Introductory TopicsAntenna Noise Temperature as Function of Pointing Angles. Cosmic Background Noise Temperature. Portable Microwave Test Packages. Dichroic Plate in a Beam-Waveguide Antenna System. Reflector SurfacesPerforated Panels. Solid Panels. Painted Panels. Wet Panels. ; Noise Temperature ExperimentsHorns of Different Gains at f1. Bird Net Cover for BWG Antennas. G/T Improvement Task. Measured Sun Noise Temperature at 32 GHz. ; Mismatch Error AnalysisAntenna System Noise Temperature Calibration Mismatch Errors. Equivalent Source Temperature at Output of Cascaded Lossy Networks. Effective Input Noise Temperature at Input of Cascaded Lossy Networks. ; Tutorial TopicsTwo-Port Containing Two Internal Paths. Three-Port Network with Two-External Noise Sources. ; Useful Formulas for Noise Temperature ApplicationsFormulas Associated with Solid Metal Reflectors. Formulas Associated with Metal Reflectors with Holes. Other Useful Formulas. ;