Extending the Field of View With Phased Array Techniques: Results of European SKA Research

Ardenne, A. van; Bregman, J. D.; Cappellen, W. A. van; Kant, G. W.; Vaate, J.G. Bij de

doi:10.1109/jproc.2009.2021594

Cited by 70 publications

(23 citation statements)

References 43 publications

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“…While this experiment was performed at low frequencies less relevant to space applications it served to demonstrate the principle capability of aperture arrays. At these frequencies LOFAR performs as a socalled sparse array in which the element spacing is wider than half a wavelength [2]. At higher frequencies, aperture arrays are best arranged as dense arrays with element spacing (much) less than half a wavelength.…”

Section: Wide Field Multi Aperture Arraysmentioning

confidence: 99%

“…Each station is realized by multielement, so called aperture arrays stations or one reflector dish operating at higher frequencies. The work performed in the European funded FP6 programme, SKA Design Studies, SKADS, [2,3,4] showed that an implementation of the SKA using phased aperture arrays, AAs, operating from 70MHz up to 1.4GHz with a dish based array covering ~1.2GHz to 10GHz represents the most capable design for the projected SKA science case [5]. As the final system is still being discussed, other implementation scenarios include the use of phased array feeds on dishes as field of view expansion technique with continuous beams allowing simultaneous wide field high efficiency observations [e.g .…”

Section: Introductionmentioning

confidence: 99%

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SKA antenna systems; Outlook for non-astronomy applications

Ardenne

Bentum

Boonstra

2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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The globally endorsed Square Kilometre Array project primarily aims to advance high sensitivity radio astronomy using a distributed collection of radio telescope stations spiraling outward from the core along three to five arms out to 3000km. This planned highly sensitive instrument covering a frequency range from 70MHz up to 10GHz will be used as wideband, high resolution, wide observing field interferometer of which the first phase will be realized this decade. With these SKA telescope capabilities and with the underlying technologies, there are many space related applications outside the immediate radio astronomy domain especially in the ground segment area. Examples are tracking space debris, precision orbit determination, simultaneous deep space tracking of multiple spacecrafts, GNSS and for other ground segment applications such as search and rescue tracking. After a brief introduction to the SKA, this paper will explore these potential application areas using the SKA based on its underlying approaches in the antenna and receiving subsystems.

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Section: Wide Field Multi Aperture Arraysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

SKA antenna systems; Outlook for non-astronomy applications

Ardenne

Bentum

Boonstra

2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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“…The beam of the aperture array LOFAR system electronically formed and processing/correlation is done in a super computer. Astronomy Concept (EMBRACE) [7]. …”

Section: Low Frequency Aperture Array: Lofarmentioning

confidence: 99%

Technologies for the Realization of the Square Kilometre Array

Vaate¹,

Geralt²

2009

Proceedings of 2nd McCt-Skads Training School. Radio Astronomy: Fundamentals and the New Instruments — PoS(2nd McCt-Skads)

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“…The survey speed can be improved by instantaneously forming multiple beams. A novel method to form multiple beams with reflector telescopes is to employ a phased array feed (PAF) [1]. A PAF is an array of electrically small antenna elements (< O/2) in the focal plane of the reflector.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of polarimetric beamformers for an L-band phased array feed

Cappellen

Wijnholds

Bakker

2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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A novel method to form multiple high-sensitivity beams with a reflector based radio telescope is to use a phased array feed (PAF). To accurately reconstruct the polarization state of the incident radio waves, the beam patterns of the PAF are of crucial importance. The co-and cross-polar element patterns of an oversampled L-band PAF prototype system have been measured in an interferometric setup. It is demonstrated that, although the antenna elements sampling the two orthogonal polarizations of the focal field are not co-located, dual polarized beams can be formed by combining the element responses in a beamformer. The capability of the PAF to optimize its beams in terms of sensitivity, sidelobes and polarization characteristics is demonstrated.

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Extending the Field of View With Phased Array Techniques: Results of European SKA Research

Cited by 70 publications

References 43 publications

SKA antenna systems; Outlook for non-astronomy applications

SKA antenna systems; Outlook for non-astronomy applications

Technologies for the Realization of the Square Kilometre Array

Experimental evaluation of polarimetric beamformers for an L-band phased array feed

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