The Multi-Field-Coupled Model and Optimization of Absorbing Material's Position and Size of Electronic Equipments

Duan, Baoyan; Qiao, Hui; Zeng, Linsuo

doi:10.1155/2010/569529

Cited by 5 publications

(4 citation statements)

References 2 publications

(2 reference statements)

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“…The electromagnetic performance of membrane antennas is influenced by the on-orbit environment, which is a light-electromagnetic-thermal-structural coupling fields. Multiphysics analysis of antennas is mostly carried out by numerical methods [117][118][119][120][121] and usually focuses on the influence caused by structural deformation on the radiation pattern. Zhang et al [122] studied the coupling effect between electromagnetic and structural field for a 14 m parabolic membrane antenna.…”

Section: Structural Dynamics and Multiphysicsmentioning

confidence: 99%

A Review on the Development of Spaceborne Membrane Antennas

Liu

et al. 2022

Space Sci Technol

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The membrane antenna technology is a very promising approach to obtain large aperture with light weight and low stowed volume. In the past decades, extensive studies have been carried out on active and passive membrane antennas. However, the practical spaceborne applications are rare due to many challenges, e.g., the surface accuracy maintenance, the on-orbit reliability, and the environmental compatibility. This paper summarizes the history and state-of-art progresses on spaceborne membrane antennas. Curved surface reflectors, conformal active membrane antennas, planar array membrane antennas, and planar reflectarray membrane antennas have been introduced, respectively. Radiofrequency design, deploying mechanism, material, experiment, application, and analysis method have been presented. By concluding the advantages and challenges of the current membrane antennas, this paper is aimed at providing a perspective of the existing problems and future trend of spaceborne membrane antennas.

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Section: Structural Dynamics and Multiphysicsmentioning

confidence: 99%

A Review on the Development of Spaceborne Membrane Antennas

Liu

et al. 2022

Space Sci Technol

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“…Investigations on multi-physical issues of antennas are mainly conducted by numerical simulations [24][25][26][27][28], and usually the surface distortion influence on radiation characteristics is the main concern. Zhang et al [29] studied the microwave pressure on a parabolic antenna and the influence of shape distortion on the radiation pattern.…”

Section: Introductionmentioning

confidence: 99%

“…Investigations on multi‐physical issues of antennas are mainly conducted by numerical simulations [24–28], and usually the surface distortion influence on radiation characteristics is the main concern. Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and numerical studies on multi‐physical issues of space parabolic membrane antennas

Liu

et al. 2021

IET Microwaves Antenna & Prop

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Front-fed parabolic reflectors are among the most commonly used antennas in the industry. While in spaceborne applications, membrane reflectors are very promising due to their lightweight and foldable features. However, considering the large size, small thickness and low stiffness, solar radiation and microwave radiation will have considerable influences on the antennas' shape accuracy as well as the radiation characteristics. In this article, a theoretical approach is presented to solve the multi-physical effects of the parabolic antenna. The deformation of the reflector is derived by the shallow shell theory, taking into account the solar pressure, the microwave pressure and the thermal effects due to solar and microwave heating. The far-field electromagnetic radiation pattern is then obtained by considering the deformation of the reflector. On the other hand, a numerical approach combining the finite element method, the multi-level fast multipole method, and the large element physical optics is also presented. Numerical examples suggest good agreement between the theoretical and numerical results. The methods have been applied into the analysis of design models in the Space Solar Power Station project. Also, these approaches can be directly extended into other space membrane reflector antennas.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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“…It causes the gain loss, sidelobe level upgrade, and inaccurate beam pointing [5,6], thus restricting the development of high-performance array antennas. Therefore, the multifield coupling is a crucial problem that needs to be solved [7].…”

Section: Introductionmentioning

confidence: 99%

Multi-Field-Coupled Model and Solution of Active Electronically Scanned Array Antenna Based on Model Reconstruction

Han

Huang

Zhou

et al. 2018

International Journal of Antennas and Propagation

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Active electronically scanned array antenna (AESA antenna) is capable of controlling the radiation pattern by controlling the feeding phase of the radiating elements. It has good performance and plays an important role in radar systems. With the development of AESA antenna towards high-frequency bands and high-density arrays, the structural-electromagnetic-thermal (SET) coupling becomes increasingly significant. It seriously restricts the realization of high performances of AESA antennas. However, the previously reported theoretical multi-field-coupled model for the coupling problem ignores the effect of the deformations of the feed system and array elements on the electrical performance. It only considers the positional deviations of the array elements in the coupling field. As a result, the accuracy of the numerical solution by the theoretical model is reduced. To overcome the above problems, this paper first establishes the field-circuit coupling model by introducing the deformation errors of the feed system into the existing theoretical model. Secondly, this paper proposes a new numerical solution for the multi-field-coupled problem of AESA antennas based on model reconstruction. And the model reconstruction includes the following: the NURBS (nonuniform rational B-spline) surface fitting algorithm that completes the mapping from finite element models to geometric models by the surface equations established by the node information and the local model reconstruction algorithm that determines the local geometric models by the positions and the directions. The NURBS surface fitting algorithm guarantees the accuracy of both the positions and shapes of array elements. The local model reconstruction algorithm ensures the accuracy of the amplitudes and phases of feed connectors. Finally, the numerical solution was applied to the 32-element AESA antenna and the simulations are close to the measurements.

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The Multi-Field-Coupled Model and Optimization of Absorbing Material's Position and Size of Electronic Equipments

Cited by 5 publications

References 2 publications

A Review on the Development of Spaceborne Membrane Antennas

A Review on the Development of Spaceborne Membrane Antennas

Theoretical and numerical studies on multi‐physical issues of space parabolic membrane antennas

Multi-Field-Coupled Model and Solution of Active Electronically Scanned Array Antenna Based on Model Reconstruction

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