Offset-parabolic-reflector antennas: A review

Although used for some decades, the offset-parabolicreflector antenna´s electrical properties and performance were not accurately modeled and optimized until the 1960´s. This paper reviews, in a tutorial fashion, the state of the art of this important antenna for readers who are not necessarily experts in antenna theory and technology. After a discussion of fundamentals, the performances of both single- and double-reflector configurations are treated and compared, and practical primary feeds are described. Comments are given on the present status of analysis and design and on problems to be solved.