Journal ArticleDOI
Erratum: Optimisation of feed position and improved profile mapping of a reflector antenna from microwave holographic measurements
TLDR
In this article, a method for optimising the feed position of a prime focus reflector antenna from phase and amplitude recordings of the radiated field is given, and the improved radiation pattern and detailed profile map of the reflector attained after feed position correction.Abstract:
A method for optimising the feed position of a prime focus reflector antenna from phase and amplitude recordings of the radiated field is given. Experimental results illustrate the improved radiation pattern and the detailed profile map of the reflector attained after feed position correction.read more
Citations
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Journal ArticleDOI
The very large array: Design and performance of a modern synthesis radio telescope
TL;DR: In this article, the authors discuss the design and performance of the very large array (VLA) in general, and describe the VLA in particular, under the seven headings: array geometry design, sensitivity considerations, phase stability requirements, signal transmission system, delay and correlator system, control system, and data-reduction requirments.
Journal ArticleDOI
Phase retrieval in the radio holography of reflector antennas and radio telescopes
TL;DR: In this article, the Misell algorithm has been used successfully to retrieve the aperture phase distribution from two numerically simulated power polar diagrams, one in focus and the second defocused, using no auxilliary reference antenna.
Journal ArticleDOI
A Practical Approach to Locate Offset Reflector Focal Point and Antenna Misalignment Using Vectorial Representation of Far-Field Radiation Patterns
TL;DR: In this article, a direct and unambiguous approach to determine the focal point of a single offset reflector is presented based on iteratively defocusing the primary feed laterally and axially.
Antenna aperture phase retrieval
TL;DR: In this article, a modified Gerchberg-Saxton algori thm was developed for retrieving the copolar aperture field phase distribution from the far field copolar amplitude pattern.
Proceedings ArticleDOI
Developments in Microwave Holographic Imaging
TL;DR: In this article, the evolution of microwave imaging is traced from its origin as a primitive analogue of optical holography to its present stage as a diagnostic imaging technique in its own right.
References
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Journal ArticleDOI
Lateral-feed displacement in a paraboloid
TL;DR: In this article, the beam shift and degradation of a paraboloidal reflector with an offset feed is analyzed by the scalar plane wave theory, and the beam characteristics for a tapered circularly symmetric illumination are presented.
Journal ArticleDOI
Microwave holographic metrology of large reflector antennas
TL;DR: In this paper, a microwave holographic technique for the determination of amplitude and phase of the principal and cross-polarized aperture fields of large reflector antennas is described, which utilizes the elevation over azimuth scanning system normally associated with these antennas, and appears to be unique among other proposed methods of field probing.
Journal ArticleDOI
Large lateral feed displacements in a parabolic reflector
W. Imbriale,P. Ingerson,W. Wong +2 more
TL;DR: In this paper, the radiation patterns of a parabolic reflector with large lateral-feed displacements are computed utilizing both the vector current method and scalar aperture theory, and compared to experimental results.
Journal ArticleDOI
Necessary criteria for the diagnosis of panel misalignments in large reflector antennas by microwave metrology
J.C. Bennett,M.P. Godwin +1 more
TL;DR: A computer simulation shows the essential requirement of data sufficiency and the ambiguities arising from under-recording in panel misalignments in large reflector antennas using microwave metrology.