EM Analysis of Deformed Metal Space Frame Radome

Xu, Wanye; Duan, Baoyan; Li, Peng; Qiu, Yuanying; Lin, Zhanchao; Zong, Yali

doi:10.1109/lawp.2013.2297733

Cited by 15 publications

(5 citation statements)

References 6 publications

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“…The method proposed in our previous work [10] is employed to implement the EM performance analysis of MSF radome. The MSF radome consists of a combination of members, hubs, and skins.…”

Section: Em Performance Analysis Of Msf Radomementioning

confidence: 99%

“…The calculation of the F si (θ, ϕ) can be readily found in [1]. The far field under the impact of both the skin and then members is [10]…”

Section: Em Performance Analysis Of Msf Radomementioning

confidence: 99%

“…However, these works mainly focused on the electrical design of MSF radomes and few works were related to the structural performance or the effect of structural deformation on the EM performance of MSF radomes. In previous work [10], we analysed the structural deformation of a 20 m MSF radome using the finiteelement method (FEM) method and studied the EM performance degradations caused by the deformation, showing that structural deformation has a considerable effect on the EM performance of the antenna-radome system. Therefore, a well-designed radome, under ideal conditions, may not meet the EM performance requirements when structural deformations occur under adverse external environments.…”

Section: Introductionmentioning

confidence: 99%

“…In previous work [1][2][3][4][5][6][7][8][9][10]12], the members of the MSF radome always have the same cross-section size, which may not be the best choice. In the design of other truss structures, such as reflector antenna back-up structure, the size of the composed bar elements varies according to its function in supporting the structure.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Integrated optimum design of metal space frame radomes with variable size members involving electromagnetic and structural analysis

Duan

Yang

et al. 2017

IET Microwaves, Antennas & Propagation

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The presence of a metal space frame (MSF) radome inevitably degrades the electromagnetic (EM) performance of the enclosed antenna, while the deformation of the radome can worsen the degradations. In this study, with the introduction of the concept of variable size member, a multidisciplinary optimisation model is proposed to implement the sizing optimisation for the members of MSF radomes to improve simultaneously the EM performance, structural performance, and self‐weight simultaneously where EM analysis and structural analysis are involved. Furthermore, a method is presented to boost the efficiency of the EM performance analysis, which makes possible the optimisation of electrically large MSF radomes. A 70 m MSF radome is simulated, and the results indicate that the proposed radome design with variable size members is superior to the conventional radome design with constant size members in terms of all the optimisation objectives, especially the EM performance and self‐weight. Several conclusions with guidance values are drawn based on the results.

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“…The method proposed in our previous work [10] is employed to implement the EM performance analysis of MSF radome. The MSF radome consists of a combination of members, hubs, and skins.…”

Section: Em Performance Analysis Of Msf Radomementioning

confidence: 99%

“…The calculation of the F si (θ, ϕ) can be readily found in [1]. The far field under the impact of both the skin and then members is [10]…”

Section: Em Performance Analysis Of Msf Radomementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Integrated optimum design of metal space frame radomes with variable size members involving electromagnetic and structural analysis

Duan

Yang

et al. 2017

IET Microwaves, Antennas & Propagation

Self Cite

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show abstract

“…To protect the enclosed antennas against adverse external environments (wind, rain, snow, and solar radiation) [4] and prevent long-term damage, GNSS antennas, particularly those employed on the fixed terrestrial applications, are usually equipped with dielectric radomes [5]. The effects of the radome on the enclosed antenna system are considerably complicated such as gain loss, boresight error, an increase in the sidelobe level, and distortion of the power pattern [6,7], which are not negligible in many cases, in particular as far as high-precision applications are concerned including ground monitoring stations, geodetic mapping, seismic monitoring, and bridge deformation monitoring. Therefore, minimizing the EM performance degradation is the primary task in the design of a radome [8,9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Performance Degradation Introduced by Radome for High-Precision GNSS Antenna

Liu

Zuo

et al. 2019

International Journal of Antennas and Propagation

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High-precision global navigation satellite system (GNSS) antennas employed on the fixed ground station are usually equipped with radomes, which are potential in yielding degradation of key parameters of antenna such as axial ratio and gain. This paper presents a study on the deterioration of high-precision GNSS antenna caused by the radome using electrically EM simulations including comparison of different geometries, materials, and heights of radome. Based on the study, an optimized radome model is proposed to minimize the axial ratio and gain degradation of antenna. Finally, a prototype of proposed radome is fabricated and measured. A good agreement between simulated and measured results evidently illustrates that the geometry, material, and height of radome are set appropriately.

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Phase Compensation of Composite Material Radomes Based on the Radiation Pattern

et al. 2017

Chin. J. Mech. Eng.

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Some compensation methods have been proposed to mitigate the degradation of radiation characteristics caused by composite material radomes, however most of them are complex and not applicable for large radomes, for example, the modification of geometric shape by grinding process. A novel and simple compensation strategy based on phase modification is proposed for large reflector antenna-radome systems. Through moving the feed or sub-reflector along axial direction opportunely, the modification of phase distribution in the original aperture of an enclosed reflector antenna can be used to reduce the phase shift caused by composite material radomes. The distortion of far-field pattern can be minimized. The modification formulas are proposed, and the limitation of their application is also discussed. Numerical simulations for a one-piece composite materials sandwich radome and a 40 m multipartite composite materials sandwich radome verify that the novel compensation strategy achieves satisfactory compensated results, and improves the distortion of the far-field pattern for the composite material radomes. For one-piece dielectric radome, more than 60% phase difference caused by radome is reduced. For multipartite radome, the sidelobe level improves about 1.2 dB, the nulling depth improves about 3 dB. The improvement of far-field pattern could be obtained effectively and simply by moving the feed or sub-reflector according to phase shift of the radome.

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EM Analysis of Deformed Metal Space Frame Radome

Cited by 15 publications

References 6 publications

Integrated optimum design of metal space frame radomes with variable size members involving electromagnetic and structural analysis

Integrated optimum design of metal space frame radomes with variable size members involving electromagnetic and structural analysis

Analysis of Performance Degradation Introduced by Radome for High-Precision GNSS Antenna

Phase Compensation of Composite Material Radomes Based on the Radiation Pattern

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