Abstract
Multi-band satellite communications antennas have applications in the commercial, defense, and civilian federal marketplace. All defence agencies have requirements for transportable multi-band systems. There are many civilian federal organizations requiring multi-band capabilities, and the commercial market uses C- and Ku-band systems, with future requirements for Ka-band coverage. The latest Intelsat satellites carry both C- and Ku-band transponders, therefore, many of the world's earth stations are, or will be, operating in both bands. The use of an antenna permitting operation of the earth terminal in all three bands without requiring the replacement of the feed is a highly desirable capability. This paper describes the design, development, and testing of an antenna system that permits operation in the three main frequency bands, (C, X, and Ku), including simultaneous operation in multiple bands. This antenna system operates in all three bands without the need to replace any components. The paper also discusses the possibilities of extending the frequency coverage of the antenna system into the Ka-band. The multi-band antenna system can increase the capabilities and operational flexibility of existing earth stations as well as new systems.
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