Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976rasc...11..671l&link_type=abstract
Radio Science, vol. 11, Aug.-Sept. 1976, p. 671-684.
Astronomy and Astrophysics
Astronomy
Antenna Design, Microwave Antennas, Parabolic Reflectors, Radar Reflectors, Radio Astronomy, Cassegrain Antennas, Horn Antennas, Parabolic Antennas, Satellite Tracking, Space Communication, Spaceborne Telescopes, Surface Roughness Effects, Technology Assessment, Two Reflector Antennas
Scientific paper
The paper reviews the evolution of reflector antennas from the days of Hertz, through the period from 1900 to World War II, the World War II years, the postwar rise of radio astronomy, the twenty years from 1945 to 1965 and the past decade. In the 1940s and 1950s, the design principles and requirements for prime focus fed systems were well established, while Cassegrain or secondary focus systems and horn reflectors came into prominence in the early 1960s with the advent of satellite tracking and communication networks. The desire to maximize the gain led to the development of sophisticated techniques for properly shaping the illumination over the reflector aperture in order to maximize efficiency and minimize spillover. Some recent developments in line source feeds make the spherical reflector attractive for scanning applications and the conical reflector for deployable spaceborne antennas.
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