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Hybrid-panel-based new design idea for large reflector antenna

Science China(Technological Sciences) 2023年第1期66卷 115-126页

作者： LIAN PeiYuan YAN YueFei WANG CongSi QIN Long XUE Song WANG Na XU Qian ZHAO WuLin ZHENG YuanPeng School of Mechano-Electronic Engineering Xidian UniversityXi'an 710071China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 8300llChina China Electronics Technology Group Corporation No.39 Research Institute Xi'an 710065China China Electronics Technology Group Corporation No.54 Research Institute Shijiazhuang 050081China

Large reflector antennas are widely used as radio telescopes and active main reflectors are generally applied to improve the surface accuracy. Considering that the high cost has been one important problem in engineering, it is worth discussing whether it is necessary to install actuators on all the panels. Thus, in this paper, a hybrid-panel-based new design idea for large reflector antenna is proposed. Assuming that the actuators are installed only in the region of the reflector with large deformations and there are no actuators in other region to reduce the actuator number, the surface accuracies and the corresponding electromagnetic(EM) performances calculated by three different panel adjustment strategies are compared. The most effective method is that the deformed reflector should be first preadjusted to reduce the gravity deformation and then the panels equipped with actuators should be adjusted to the locations determined by the best fitting reflector(BFR) derived by the deformed reflector with no actuators. A 35 m reflector antenna is adopted as an example to calculate the surface accuracy and EM performance when parts of the panels are equipped with actuators. The simulation results show that there is no need to install actuators on all panels and the presented method can greatly reduce the number of actuators with guaranteed surface accuracy. Thus, during the antenna structural design phase, once the surface accuracy requirement is given, the number of actuators can be minimized to reduce the manufacturing and maintenance costs as much as possible. This paper can provide valuable guidance for the design of an active main reflector with hybrid panels.

关键词： reflector antenna hybrid panel actuator distribution adjustment strategy surface accuracy power pattern

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Novel Surface Design of Deployable reflector antenna Based on Polar Scissor Structures

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Chinese Journal of Mechanical Engineering 2020年第5期33卷 4-18页

作者： Pengyuan Zhao Jinguo Liu Chenchen Wu Yangmin Li Keli Chen State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of ScienceShenyang 110016China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169China University of Chinese Academy of Sciences Beijing 100049China Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China

Space-deployable mechanisms can be used as supporting structures for large-diameter antennas in space *** study proposes a novel method for constructing the surface design of space reflector antennas based on polar scissor *** concurrency and deployability equations of the space scissor unit with definite surface constraints are derived using the rod and vector *** equations of the spatial transformation for space n-edge polar scissor units are summarized.A new closed-loop deployable structure,called the polar scissor deployable antenna(PSDA),is designed by combining planar polar scissor units with spatial polar scissor *** overconstrained problem is solved by releasing the curve constraint that locates at the end-point of the planar scissor *** simulation and error analysis are *** results show that the PSDA can effectively fit the paraboloid of ***,deployment experiments verify the validity and feasibility of the proposed design method,which provides a new idea for the construction of large space-reflector antennas.

关键词： Deployable structures Polar scissor unit reflector antenna Surface design

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Far-Field Pattern Tolerance Analysis of reflector antenna with Random or System Error Based on Interval Arithmetic

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Chinese Journal of Electronics 2018年第3期27卷 641-647页

作者： LI Peng LI Na XU Wanye WANG Wei Key Laboratory of Electronic Equipment Structure Design Ministry of Education Xidian University

A novel analytic approach for the research of effect on electromagnetic performance of reflector antennas with deformation, including random processing error and system error caused by external loads(such as wind,gravity, and solar radiation), in panels of the reflector surface is proposed. The deformations are modeled as error intervals, and their impact on the electromagnetic performance, including radiation power pattern and some main electromagnetic characteristics(such as side lobe level,peak power, and half-power beamwidth), are efficiently estimated by Interval analysis(IA). The closed-form equations indicate the relationship between the error interval and the bounds(upper and lower bounds) of the radiated power pattern interval by exploiting the rules of interval arithmetic. Two kinds of surface errors(random and system error) and two shapes of deformation area(bump-like and sector) are taken into account in the numerical examples to assess the validation and effectiveness of the proposed approach. The results of the examples show that the proposed IA-based approach has great capability and effectiveness regarding the traditional statistical method(such as Monte-Carlo method).

关键词： reflector antenna Interval analysis Random error System error Power pattern

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Radiation Characteristics of the reflector antenna with Random Perforated Holes

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Journal of Beijing Institute of Technology 2004年第4期13卷 378-380页

作者：董涛徐晓文肖疆 School of Information Science and Technology Beijing Institute of Technology Beijing100081 China

The radiation characteristics of a doubly curved shaped reflector antenna with random holes is analyzed by physical optics (PO) method, and the probability model of the random holes and its numerical realization method are presented. The radiation patterns show that in the azimuth plane the peak sidelobe level becomes much higher as the reflector surface with random holes. The simulation results can provide a theoretical guidance for the radar attackers.

关键词： reflector antenna physical optics(PO) method radiation characteristics random perforated holes

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A New reflector antenna Based on the Fresnel Principle

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The Journal of China Universities of Posts and Telecommunications 2001年第2期8卷 66-68页

作者： DU Hui ping (Department of Radio Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065,P.R.China) Department of Radio Engineering Chongqing University of Posts and Telecommunications

A new type of reflector antenne is proposed, which applies the 1 D Fresnel zone phase correction to the classical parabolic cylindrical reflector, providing an alternative to the dual parabolic cylindrical ones discussed by Sanad and Shafai [1] . The focusing characteristics of the new reflector are analyzed by physical optics method, and numerical results are illustrated to evaluate its applicability.

关键词： fresnel zone phase correction reflector antenna physical optics method

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A New Approach to Fit the Distorted reflector antenna and its Computation of Electrical Characteristics

A New Approach to Fit the Distorted Reflector Antenna and it...

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首届亚洲机械电子学学术会议

作者： C.S.Wang B.Y.Duan Y.Y.Qiu J.L.Du X.D.Shao School of Electro-Mechanical Engineering Xidian University Xi’an 710071 China

＜正＞The traditional method of analyzing distorted reflector antenna is to compute its electrical characteristics on the basis of the whole distorted reflector by exploring the best-fit paraboloid for rms surface error,which, however,may make the big partial distortion of reflector *** on the shape of distorted reflector, this paper presents a new fitting approach combining the hoop trigonometric function fitting and quadratic radial function fitting methods,with which the reflector can be analyzed and fitted *** paper also includes the derivation of the required formulae and the application of the new approach to the analysis of a 7.3-m antenna with good and useful results.

关键词： reflector antenna Deviation Surface Fitting Radiation Pattern Gain

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Influence and experiment of cable-net manufacturing errors on surface accuracy of mesh reflector antennas

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Chinese Journal of Aeronautics 2023年第2期36卷 363-376页

作者： Zihan SUN Baoyan DUAN Yiqun Zhang Dongwu YANG School of Electromechanical Engineering Xidian UniversityXi'an 710071China

Cable-net structures are of substantial importance in the construction of large mesh reflector *** to the inevitable errors in their manufacturing process,the reflector surface accuracy *** study makes a comprehensive investigation of random manufacturing errors during constructing the mesh reflector antennas,and analyze its influence on reflector surface ***,the sensitivity of reflector surface accuracy with respect to the random errors of the unstressed cable length is mathematically ***,a non-button connecting method is proposed and analyzed to reduce manufacturing ***,two physical experiment models based on 2.62-meter mesh reflector antenna are ***,numerical examples and experimental tests are given to demonstrate the effectiveness of the proposed *** with the traditional method,the proposed method can effectively reduce the influence of the manufacturing errors on the reflector surface ***,the reduction in the sizes of the nodes also reduces the risk of entanglement of the mesh reflector antenna during the deployment process,and thereby improves the deployment reliability.

关键词： Error analysis Experimental tests Manufacturing methods reflector antenna Surface accuracy

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Electromagnetic performance analysis of reflectorantennas with non-uniform errors along radius

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Journal of Systems Engineering and Electronics 2016年第5期27卷 961-967页

作者： Peiyuan Lian Congsi Wang Wei Wang Binbin Xiang Xinjiang Astronomical Observation Chinese Academy of Sciences Urumqi 830011 China

Based on the works of Greve and Rahmat-Samii, theelectromagnetic （EM） performance of the reflector antenna withnon-uniform surface errors along radius is further addressed. Amathematical model is developed to describe the weighting functionfor the non-uniform surface errors along radius. Then, somediscussions on the peak gain loss （PGL） and the first sidelobelevel increase （SLLI） caused by the non-uniform surface errors arepresented and several significant radiation characteristics of thereflector with non-uniform errors are pointed out. Last, based onthe proposed model, the weighted root mean square （RMS） valueof the surface errors is produced to evaluate the EM performanceand several representative cases with different non-uniform errorsare presented with good results. Results show that the weightedRMS value should be taken into account for a better quality evaluationof the reflector surface.

关键词： reflector antenna surface weighting function antennatolerance quality evaluation.

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Static analysis of synchronism deployable antenna

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第8期7卷 1365-1371页

作者： GUAN Fu-ling SHOU Jian-jun HOU Guo-yong ZHANG Jing-jie Department of Civil Engeering Zhejiang University Hangzhou 310027 China Chongqing Research Institute of Building Science Chongqing 400015 China

A 3D synchronism deployable antenna was designed, analyzed, and manufactured by our research group. This an-tenna consists of tetrahedral elements from central element. Because there are springs at the ends of some of the rods, spider joints are applied. For analysis purpose, the structure is simplified and modelled by using 2D beam elements that have no bending stiffness. Displacement vectors are defined to include two translational displacements and one torsional displacement. The stiff-ness matrix derived by this method is relatively simple and well defined. The analysis results generated by using software de-veloped by our research group agreed very well with available test data.

关键词： Space deployable structures Analysis design reflector antenna

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Application of FSS to Reduction of antennas' RCS

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Journal of Systems Engineering and Electronics 1996年第1期7卷 71-74页

作者： Feng Lin & Roan Yingzheng (University of Electronic Science and Technology of China, Chengdu 610054) University of Electronic Science and Technology of China Chengdu 610054

It is an effective approach for reducing antennas'scattering to use frequency selective surface (FSS) as main reflector or *** measured results are given and discussed. In comparison with ordinary metallic refiector antenna, the FSS reflector antenna's radiation properties are maintained basically but its radar cross-section (RCS) is reduced significantly. FSS subrefiector can be more easily applied to practice, but has a little higher RCS level than that of FSS main reflector.

关键词： reflector antenna antenna scattering Frequency selective surface.

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