Coverage flexibility by means of a reconformable subreflector

Viskum, H.-H.; Clarricoats, P.J.B.; Crone, G.

doi:10.1109/aps.1997.631835

Cited by 10 publications

(3 citation statements)

References 1 publication

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“…The on-orbit reconfiguration of satellite antennas has the potential to make Telecommunication and Earth Observation missions more versatile [1,2,3,4]:…”

Section: Introductionmentioning

confidence: 99%

Shape control of reconfigurable antenna reflector: Concepts and strategies

Rodrigues

Angevain

Santiago-Prowald

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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Mechanically reshapeable reflectors have the potential for enabling satellite antenna reconfiguration with lower cost, mass, power consumption and thermal dissipation than beam-forming active antenna arrays. This paper addresses two key challenges for the successful implementation of this technology which are the shape definition of the reflector and its on-orbit shape control. A method of shape optimization which simultaneously guarantees performances in terms of the Radio-Frequency pattern on the ground servicearea and structural strength and stability is presented. Moreover, the way in which the electro-mechanical nature of the reflector drives the implementation of its shape-control on-orbit is discussed.

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“…The on-orbit reconfiguration of satellite antennas has the potential to make Telecommunication and Earth Observation missions more versatile [1,2,3,4]:…”

Section: Introductionmentioning

confidence: 99%

Shape control of reconfigurable antenna reflector: Concepts and strategies

Rodrigues

Angevain

Santiago-Prowald

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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“…A correction has also been considered for millimetre and submillimetre wave applications in the 30 meter Pico Veleta radio telescope [1]. The subject was investigated for telecommunication applications in [2], but with emphasis on beam reconfiguration.…”

Section: Introductionmentioning

confidence: 99%

Corrective Subreflectors for Millimetre and Sub-Millimetre Wave Applications

Viskum¹,

Klooster²,

Zocchi³

et al. 2003

21st International Communications Satellite Systems Conference and Exhibit

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A mechanically controllable reflector has been manufactured by using an electroformed Nickel shell supported and controlled by 19 actuators. If such a system is used as subreflector in a millimetre-wave antenna system for limb-sounding applications, it is possible to reduce the accuracy requirements to the main reflector and thereby save on overall costs. Instead, the shape of the subreflector is controlled to correct for the thermally induced deformations on the main reflector. The paper describes the method of generating the desired subreflector shape for given distortions, and the experimental model that is used to demonstrate the feasibility of the technique.

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“…Such systems are of interest also for special applications, such as compact range antennas [1], feeding structures for very large radio telescopes [2,3], reconfigurable reflectors [4,5]. During the years, a large number of dual reflector synthesis techniques have been introduced in order to design reflector geometries and feeding structures allowing to satisfy "at the best" the far-field pattern requirements.…”

Section: Introductionmentioning

confidence: 99%

An Effective Power Synthesis Technique for Shaped, Double-Reflector Multifeed Antennas

Bucci¹,

Capozzoli²,

D'Elia³

2003

PIER

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Abstract-A new synthesis algorithm for shaped, double-reflector antennas with complex array feed is presented.The approach presented here aims to improve the efficiency of synthesis techniques without missing the required accuracy. The algorithm is based on a convenient splitting of the original problem into two phases, each one involving a sub-problem significantly simpler than the original one.A double reflector synthesis problem involving only Fourier Transform (FT) operators is of concern during the first phase. The subreflector surface and a first estimate of the main reflector geometry are obtained in this step. A single reflector synthesis problem is considered during the second phase wherein the final main reflector surface and the excitation coefficients of the primary feed array are obtained. While in the first phase only approximate relationships between the unknowns and the secondary radiated field are exploited, in the second phase accurate radiation operators are involved. Despite this accuracy, the second phase is still numerically effective since it involves a single reflector synthesis problem and exploits, as "good" starting point, the main reflector estimate obtained during the first phase.The effectiveness of the approach is due to the fact that the necessity of dealing simultaneously with two reflector surfaces, the key of the synthesis difficulties, is afforded only during the first phase where efficient computational tools are allowed.A numerical example shows the effectiveness of the proposed approach.

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Coverage flexibility by means of a reconformable subreflector

Cited by 10 publications

References 1 publication

Shape control of reconfigurable antenna reflector: Concepts and strategies

Shape control of reconfigurable antenna reflector: Concepts and strategies

Corrective Subreflectors for Millimetre and Sub-Millimetre Wave Applications

An Effective Power Synthesis Technique for Shaped, Double-Reflector Multifeed Antennas

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