Preliminary design of paraboloidal reflectors with flat facets

Deng, Yang; Zhang, Shuxin; Li, Tuanjie; Cao, Huiping

doi:10.1016/j.actaastro.2013.03.027

Cited by 35 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, only the effects of the error on the aperture phase will be discussed in this section. Suppose that the integration point on the reflector has a deviation of from the ideal paraboloid in -direction, the ray path difference caused by the error can be expressed as (8) where is illustrated in Fig. 3.…”

Section: B Phase Error Analysismentioning

confidence: 99%

See 1 more Smart Citation

Surface Configuration Design of Cable-Network Reflectors Considering the Radiation Pattern

Zong

Duan

Ban

et al. 2014

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

Since the curved surface of a cable-network reflector is generally approximated by regular flat facets, the electromagnetic performance of the cable-network reflector is determined by the size and shape of the facets. In many cases, the geometric approximation errors of the facets are periodically distributed on the surface, which can result in strong grating lobes. First, in this paper, the periodicity of the geometric approximation error and the effects of this periodicity on the EM performance are investigated. Second, the periodic geometric approximation errors of the regularly faceted configurations are disturbed by three proposed approaches, and three new types of surface configurations are thus formed. The first approach is to introduce radial direction disturbance parameters, the second one is to change the shape of the outlines and the last one is to use a Penrose-tiling-like configuration. The first two approaches are carried out in combination with the optimization strategies. Finally, the effects of the mentioned disturbance parameters on the EM performance are simulated, and some numerical examples are given to show that the surface configurations proposed in this paper can reduce the grating lobes level obviously, without either decreasing the gain or increasing the structural complexity of the cable-network reflectors.

show abstract

Section: B Phase Error Analysismentioning

confidence: 99%

“…Agrawal [6] and Yang [8] observe that the triangular facets are regularly distributed on the faceted surface, and the geometric approximation errors are periodic (see Fig. 2).…”

mentioning

confidence: 95%

Surface Configuration Design of Cable-Network Reflectors Considering the Radiation Pattern

Zong

Duan

Ban

et al. 2014

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…4a, should be constructed. For a certain requirement on the reflector surface accuracy, the n could be determined by reference [6,7]. And the boundary nodes are determined by the n and the diameter of reflector antenna.…”

Section: Topology Designmentioning

confidence: 99%

“…Then, an initial finite element model of the whole reflector antenna is constructed. In this model, the preloads T of the cables is applied by an initial strain / ( ) T EA   (7) where E and A represent the elastic module and the cross section area of the cable element respectively.…”

Section: Form-finding Process With Elastic Rim Trussmentioning

confidence: 99%

A Cable-net Form-finding Process for an Up-down Asymmetric Rim Truss

et al. 2019

Self Cite

View full text Add to dashboard Cite

Traditional AstroMesh cable-net reflectors were deployed via a parallelogram mechanism, which provides symmetric supporting points for the front and rear nets and determines the height of stowed rim truss. In order to further reduce the height of stowed rim truss, a new up-down asymmetric rim truss was proposed without matched cable-net form-finding approach. This paper aims at designing a matched cable-net form-finding process for the new structure., 0 (2019) MATEC Web of Conferences

show abstract

“…There are some structural specifics for cable mesh reflector antennas, which make the mentioned synthesis methods fail in this application. Firstly, the parabolic surface of cable mesh reflectors is approximated and characterised by a series of flat or curved facets [16]. It cannot be described by a global polynomial expansion, even the popular Zernike polynomials [17].…”

Section: Introductionmentioning

confidence: 99%

Design of shaped offset cable mesh reflector antennas considering structural flexible property

Zhang

2017

IET Microwaves, Antennas & Propagation

Self Cite

View full text Add to dashboard Cite

Contoured beams are required in the next design period of cable mesh reflector antennas. This study presents a new approach for synthesising contoured beams by integrated structural‐electromagnetic optimisation concept. A multidisciplinary optimisation model is established from the viewpoint of interaction between structural and electromagnetic disciplines. The structural parameters are directly optimised to produce contoured beams. To consider the structural flexible property, sensitivity analysis of radiation pattern with respect to surface nodal displacements and further to structural parameters is performed in the approach. With both the information of structural and electromagnetic sensitivities, the optimisation model is expanded and solved by a sequential linear programming. Simulation results of a contoured beam covering the continental United States (CONUS) verify its effectiveness.

show abstract

Preliminary design of paraboloidal reflectors with flat facets

Cited by 35 publications

References 11 publications

Surface Configuration Design of Cable-Network Reflectors Considering the Radiation Pattern

Surface Configuration Design of Cable-Network Reflectors Considering the Radiation Pattern

A Cable-net Form-finding Process for an Up-down Asymmetric Rim Truss

Design of shaped offset cable mesh reflector antennas considering structural flexible property

Contact Info

Product

Resources

About