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Journal ArticleDOI

Antenna tolerance theory—A review

J. Ruze
- Vol. 54, Iss: 4, pp 633-640
TLDR
The theoretical basis of antenna tolerance theory is reviewed in this paper, where the axial loss of gain and pattern degradation as a function of the reflector surface rms error and the surface spatial correlation are discussed.
Abstract
The theoretical basis of antenna tolerance theory is reviewed. Formulas are presented for the axial loss of gain and the pattern degradation as a function of the reflector surface rms error and the surface spatial correlation. Methods of determining these quantities by astronomical or ground-based electrical measurements are described. Correlation between the theoretical predictions and the performance of actual large antenna structures is presented.

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Citations
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Planck 2013 results. VII. HFI time response and beams

Peter A. R. Ade, +276 more
TL;DR: In this article, the authors characterized the effective beams, the effective beam window functions and the associated errors for the Planck High Frequency Instrument (HFI) detectors, including the effect of the optics, detectors, data processing and the scan strategy.
Journal ArticleDOI

An overview of near-field antenna measurements

TL;DR: In this paper, a brief history of near-field antenna measurements with and without probe correction is outlined, beginning with ideal probe scanning on arbitrary surfaces and ending with arbitrary probes scanning on planar, cylindrical, and spherical surfaces.
Journal ArticleDOI

Fundamental limitations in antennas

R.C. Hansen
TL;DR: In this article, four fundamental limitations in antennas have been identified in the areas of: electrically small antennas, super-directive antenna, superresolution antennas, and high-pin antennas.
Journal ArticleDOI

The Atacama Pathfinder EXperiment (APEX) : a new submillimeter facility for southern skies

TL;DR: APEX, the Atacama Pathfinder EXperiment, has been successfully commissioned and is operational as discussed by the authors, which is located at 5107 m altitude on Llano de Chajnantor in the Chilean High Andes, on what is considered one of the world's outstanding sites for submillimeter astronomy.

Deployable Tensegrity Structures for Space Applications

Gunnar Tibert
TL;DR: A state-of-the-art review of deployable masts and reflector antennas for space applications is presented, and it is concluded that several form-finding methods are available, but no single method is suitable for general tensegrities.
References
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Journal ArticleDOI

Diffraction from an irregular screen with applications to ionospheric problems

TL;DR: In this article, an analysis of the diffraction effects produced when a plane wave is incident upon an irregular diffracting screen, and the results are applied to the problem of the reflexion of radio waves from an ionosphere which is irregular in the horizontal plane.
Journal ArticleDOI

The diffraction theory of aberrations

TL;DR: In this article, a survey of the development of the subject is traced from the early researches of Airy on an aberration-free image and the advances made in recent years are discussed in detail; these mainly concern the effects of small aberrations, tolerance criteria, and the asymptotic treatment of diffraction problems.
Journal ArticleDOI

Tolerance theory of large antennas

TL;DR: In this article, the effects of systematic and random errors on the radiation pattern of antennas representable by a field distribution over an aperture, such as paraboloidal reflectors and large arrays of small elements, were investigated.
Journal ArticleDOI

Effect of arbitrary phase errors on the gain and beamwidth characteristics of radiation pattern

TL;DR: In this article, simple expressions have been obtained for predicting the maximum loss in antenna gain when the peak value of the aperture phase deviation is known, and relations have also been established such that the maximum change in the main-lobe beamwidth can be predicted from the knowledge of the amplitude distribution function and the peak phase deviation.
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