Study variants of hard CFRP reflector for intersatellite communication

Prosuntsov, P. V.; Резник, С. В.; Mikhailovsky, KV; Novikov, A. O.; Aung, Zaw Ye

doi:10.1088/1757-899x/153/1/012012

Cited by 11 publications

(7 citation statements)

References 2 publications

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“…As was already demonstrated in [5][6][7][8], the rib-stiffened structures have the lowest specific density. The following rib reinforcement patterns on the convex surface were studied: isogrid pattern [5,6], five-point star and six-point star [7,8]. There are reasons to believe that the linear density for such AR can be lower than 2 kg/m 3 .…”

Section: Introductionsupporting

confidence: 61%

“…At present, the linear density values for AR approach 3 kg/m 2 , while dimensional tolerance should not exceed 1/16 wavelength. The development of communication satellite systems resulted in a number of approaches to satisfy these requirements: honeycomb-filled threelayered structures [1], dual gridded structures [2] and rib structures [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of space antennas mirror reflectors parameters made of composite materials

2017

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Section: Introductionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Comparison of space antennas mirror reflectors parameters made of composite materials

2017

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“…The authors and their colleagues have presented the design studies of reflector structures made of carbon fiber with various ribs arrangements on the convex surface of the parabolic shell [1][2][3][4]. This paper, by way of example, presents the mathematical modeling results of thermal regimes for different design variants of a reflector: isogrid, five-pointed star and sixpointed star ribbed reinforcement arrangement (Table 1, 2, Fig.…”

Section: A Hard-to-achieve Combination Of Lightweight and Stiffnessmentioning

confidence: 99%

Thermal regimes of space composite structures. Part II

Резник

2018

MATEC Web Conf.

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Abstract.Composite materials have a unique combination of mechanical and thermal characteristics. This allows you to create lightweight, durable, heat-resistant design. In the article the common features for all space composite structures were highlighted. The article deals with the thermophysical problems arising in the design of space composite structures associated with strict requirements for their weight and functional efficiency. The feasibility of using combined heat transfer models to improve design accuracy has been shown. Space antenna reflectors Evolution of onboard space antennasThe first satellites were equipped with non-directional rod antennas, so to receive their weak signals large receiving ground antennas were required. Exploration of the solar system (first Venus and Mars, then Jupiter, Saturn, Uranus, Neptune and Mercury), as well as the development of the high-apogee elliptical orbits and geostationary orbit (GEO) called for devices to concentrate the radio waves -reflectors. As a rule, reflectors are open, gently sloped parabolic shells. Today reflectors can be fixed-shape, adaptive, shape-shifting within a predetermined range and transformable, with the antenna aperture diameter being much greater than that of the launch vehicle fairing (typically over 4 meters). Reflectors operate in L, Ka, Ku, V, and Q bands in 1-70 GHz range for the stationary and mobile "land -board of the satellite -land" radio communication, as well as the inter-satellite communication.In space reflectors are unevenly heated by the heat radiation from the Sun and the Earth, which causes thermal deformations and shape deviation. To enhance the shape stability, a three-layer layout is most commonly used, where two thin composite shells are joined together by honeycombs of metal foil. Frames on the convex surface are used to increase the structural stiffness and to fix the reflector to the spacecraft. The areal density of the threelayer reflectors is 3.5-5.0 kg/m 2 . A different layout, where ribs are positioned on the convex surface, enables stiff structures with a still lower areal density. Modern communication satellites are often equipped with several reflectors, so a lower areal density can noticeably decrease the structure weight. However, the choice of the ribs arrangement, shape, height and thickness requires further research.

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“…Precisely, during the design of telecommunication systems such as antenna reflectors as shown in figurer 1 a), b) ,c) [8], printed substrate antennas as shown in Figure 1) d), [2], the electrical properties of the materials used in the manufacture of these systems or even perform numerical simulations, especially electrical permittivity, magnetic permeability and electrical conductivity must be considered by knowing their effect on the absorption, transmissions and reflections characteristics such as S-parameters [1][2][3][4][5][6][7][8][9][10]. In several years, Fibers Reinforced Polymer (FRP) became more interesting and indispensable in the field of manufacturing of radio frequencies telecommunication systems and radio absorption material (RAM) due of its ability to withstand external conditions , besides his special electrical properties, although the electrical properties of FRP are Bi-anisotropic ,which they could be represented as tensors to describe the heterogeneous nature and the fibers orientation effect on the their electromagnetic behavior when exposed under microwaves [9][10][11][12][13][14][15][16][17][18]. These last one are related to several parameters such as volume fraction and fibers orientations inside the FRP, fibers orientation could be very effective when it comes to the S-parameters because its decide the behavior of the FRP under microwaves.…”

Section: Introductionmentioning

confidence: 99%

High Radio Frequencies interaction of Composite Materials Using Rectangular Waveguide

Adib¹,

Bensaid

2022

MATERIALS

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The main goal of this paper is studying the composite material behavior under microwave which they used in antennas reflectors. For that, a transmission line method based on X-band WR90 rectangular waveguide is used. The Bi-anisotropic electrical properties are defined as tensors in finite element model. The fibers of the single layer composite are oriented in different directions. The S-parameters (S11 and S12) are calculated using COMSOL Multiyphysics, the S-parameters and currents density behavior show that they very affected by the orientations of the fibers which mean must be considered in any design of RF equipments, more the fibers are parallel with the electrical field more the reflection coefficient get higher.

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Study variants of hard CFRP reflector for intersatellite communication

Cited by 11 publications

References 2 publications

Comparison of space antennas mirror reflectors parameters made of composite materials

Comparison of space antennas mirror reflectors parameters made of composite materials

Thermal regimes of space composite structures. Part II

High Radio Frequencies interaction of Composite Materials Using Rectangular Waveguide

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