Journal ArticleDOI
A beam-waveguide feed having a symmetric beam for Cassegrain antennas
M. Mizusawa,T. Kitsuregawa +1 more
- Vol. 21, Iss: 6, pp 884-886
TLDR
In this paper, the asymmetric reflectors are unavoidable in the composition of a beam-waveguide feed and generally cause asymmetry of the beam from the feed, and a rotationally symmetric beam can be obtained on the basis of geometrical optics.Abstract:
The asymmetric reflectors are unavoidable in the composition of a beam-waveguide feed and generally cause asymmetry of the beam from the feed. By means of the combination of two suitable asymmetric reflectors a rotationally symmetric beam can be obtained on the basis of geometrical optics.read more
Citations
More filters
Journal ArticleDOI
Quasi-optical techniques
TL;DR: The basic theory of quasi-optical Gaussian beam propagation and beam transformation by simple optical elements is summarized, and coupling to and between Gaussian beams is briefly discussed Guidelines for Gaussian optics system design are reviewed, the most important being beam truncation and matching Passive components in the terahertz frequency range based on quasioptical propagation, including polarization processors, filters, diplexers, and ferrite devices, are examined as mentioned in this paper.
Journal ArticleDOI
Offset multireflector antennas with perfect pattern symmetry and polarization discrimination
TL;DR: In this paper, the authors derived conditions that are useful for designing reflector antennas with excellent cross-polarization discrimination, provided a suitable feed such as a corrugated horn is employed.
Journal ArticleDOI
Some highlights in reflector antenna development
TL;DR: Reflector antennas have been used since the radio pioneering era of Lodge, Hertz, and Marconi, but it took the exigent demands of radar in World War II to stimulate a real development in the reflector art as discussed by the authors.
Journal ArticleDOI
An imaging beam waveguide feed
TL;DR: In this article, a pseudo-frequency independent beam waveguide feed has been designed and built to accommodate a new liquid-helium-cooled millimeter wave radio astronomy receiver in the side cab of the Crawford Hill 7-m antenna.
Journal ArticleDOI
A quasi-optical polarization-independent diplexer for use in the beam feed system of millimeter-wave antennas
Adel A. M. Saleh,R. Semplak +1 more
TL;DR: In this paper, the theory and performance of a quasi-optical Fabry-Perot diplexer employing two rectangular meshes and capable of polarization independent operation at large angles of incidence are presented.
References
More filters
Journal ArticleDOI
The Reflecting Beam Waveguide
TL;DR: In this paper, a type of beam waveguide which uses appropriately shaped metal reflectors instead of dielectric lenses as the phase correcting devices is described and a theory has been developed which, subject to certain restrictions, describes the modes of this type of waveguide and predicts a loss of the order of 0.01 db per iteration.
Journal ArticleDOI
Änderungs- und Verbesserungsmöglichkeiten im Aufbau großer Cassegrainantennen mit Hornparabolspeisung
TL;DR: In this paper, a rotationssymmetrischen Verteilung des Strahlungsfeldes and eine Erniedrigung des Nebenzipfelpegels in der Ä'-Ebene von 17 dB auf über 30 dB erhalten.