Th begins with an overview of the parameters that characterize antennas, then describes antenna technology required in communication satellite systems, reviews architectures for the space and user segments, looks at antenna technology alternatives, and details methods to evaluate both component- and system-level performance. Techniques to mitigate interference are covered, and processes used in the development and characterization of antenna systems are described. Th is for antenna system planners and technology developers. Dybdal is affiliated with the Aerospace Corporation.