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The Tianma 65 m radio telescope antenna 被引量:1
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作者 Biao Du Yuanpeng Zheng +8 位作者 Guoxi Liu Yifan Zhang Wancai Zhang Lijun Zhang Shunyou Qin Zhiqiang Shen Qinghui Liu Bin Li Jinqing Wang 《Astronomical Techniques and Instruments》 CSCD 2024年第5期247-259,共13页
The Tianma 65 m radio telescope(TMRT)at Shanghai is a fully steerable single-dish radio telescope in China,operating at centimeter to millimeter wavelengths(1.25 GHz to 50 GHz).This paper presents details on the main ... The Tianma 65 m radio telescope(TMRT)at Shanghai is a fully steerable single-dish radio telescope in China,operating at centimeter to millimeter wavelengths(1.25 GHz to 50 GHz).This paper presents details on the main specifications,design,performance analysis,testing,and construction of the telescope antenna.The measured total efficiency is better than 50%over the whole elevation angle range,first sidelobe levels are less than−20 dB,antenna system noise temperatures are less than 70 K at 30°elevation angle,and pointing accuracy is less than 3″.The measured and calculated results are in good agreement,verifying the effectiveness of the design and analysis. 展开更多
关键词 Radio telescope reflector antenna High sensitivity Homology design High pointing accuracy
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An Elliptical-Beam Reflector Antenna forSatellite Communication System
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作者 刘刚 高本庆 王越 《Journal of Beijing Institute of Technology》 EI CAS 1997年第3期267-273,共7页
An offset elliptical reflector antenna suitable for satellite application was designed and investigated when it was fed by a rectangular horn partially filled.with a dielectric..The.reflector antenna exhibits high gai... An offset elliptical reflector antenna suitable for satellite application was designed and investigated when it was fed by a rectangular horn partially filled.with a dielectric..The.reflector antenna exhibits high gain, low cross polarization. low sidelines and an elliptical beam. Al- though this study has been carried out in view of possible satellite applications, it is clear that this. antenna. is also suitable for use in radar antennas. 展开更多
关键词 satellite antenna elliptical -beam antenna. offset reflector antenna
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Novel Surface Design of Deployable Reflector Antenna Based on Polar Scissor Structures 被引量:8
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作者 Pengyuan Zhao Jinguo Liu +2 位作者 Chenchen Wu Yangmin Li Keli Chen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2020年第5期4-18,共15页
Space-deployable mechanisms can be used as supporting structures for large-diameter antennas in space engineering.This study proposes a novel method for constructing the surface design of space reflector antennas base... Space-deployable mechanisms can be used as supporting structures for large-diameter antennas in space engineering.This study proposes a novel method for constructing the surface design of space reflector antennas based on polar scissor units.The concurrency and deployability equations of the space scissor unit with definite surface constraints are derived using the rod and vector methods.Constraint 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 units.The overconstrained problem is solved by releasing the curve constraint that locates at the end-point of the planar scissor mechanism.Kinematics simulation and error analysis are performed.The results show that the PSDA can effectively fit the paraboloid of revolution.Finally,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. 展开更多
关键词 Deployable structures Polar scissor unit reflector antenna Surface design
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Effect of Facet Displacement on Radiation Field and Its Application for Panel Adjustment of Large Reflector Antenna 被引量:3
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作者 Wei WANG Peiyuan LIAN +2 位作者 Shuxin ZHANG Binbin XIANG Qian XU 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第3期578-586,共9页
Large reflector antennas are widely used in radars, satellite communication, radio astronomy, and so on. The rapid developments in these fields have created demands for development of better performance and higher sur... Large reflector antennas are widely used in radars, satellite communication, radio astronomy, and so on. The rapid developments in these fields have created demands for development of better performance and higher surface accuracy. However, low accuracy and low effi- ciency are the common disadvantages for traditional panel alignment and adjustment. In order to improve the surface accuracy of large reflector antenna, a new method is pre- sented to determinate panel adjustment values from far field pattern. Based on the method of Physical Optics (PO), the effect of panel facet displacement on radiation field value is derived. Then the linear system is constructed between panel adjustment vector and far field pattern. Using the method of Singular Value Decomposition (SVD), the adjustment value for all panel adjustors are obtained by solving the linear equations. An experiment is conducted on a 3.7 m reflector antenna with 12 segmented panels. The results of simulation and test are similar, which shows that the presented method is feasible. Moreover, thediscussion about validation shows that the method can be used for many cases of reflector shape. The proposed research provides the instruction to adjust surface panels efficiently and accurately. 展开更多
关键词 reflector antennas Surface accuracy -Radiation field - reflector antenna mechanical factors Electromechanical effects - Panel adjustment - Singularvalue decomposition (SVD)
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B-spline surface fitting and simplified GO/PO analysis of subreflector correction for large Cassegrain antenna distortion compensation 被引量:2
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作者 You Ban Cong-Si Wang +2 位作者 Shu-Fei Feng Wei Wang Bao-Yan Duan 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2018年第7期53-62,共10页
The main surface of a large Cassegrain antenna consists of a large number of panels. There are inevitably random and systematic errors which will degrade the antenna pattern and limit its applicability when working at... The main surface of a large Cassegrain antenna consists of a large number of panels. There are inevitably random and systematic errors which will degrade the antenna pattern and limit its applicability when working at high frequencies. Correcting the subreflector surface is difficult to describe by a global expansion effectively with a small amount of data. This paper presents a simple and clear way for correcting the subreflector surface of a large Cassegrain antenna for achieving such compensation. The advantage of the method is that the geometrical optics (GO) analysis is extremely simplified by the concept of equivalent prime-focus paraboloid, and corrected deformations of the subreflector surface are determined by simple formulas which represent the relationship between distortions of the subreflector surface and phase of the main surface current. The final shape of the subreflector surface is represented by a B-spline surface. To obtain a satisfactory antenna pattern with the simplest subreflector surface, the optimal number of B-spline patches are searched by particle swarm optimization (PSO). The shaping process is verified by compensating a 22-m Cassegrain antenna whose main reflector has 96 panels. The results are satisfactory and demonstrate the simplicity and effectiveness of the approach. 展开更多
关键词 telescopes reflector antennas subreflector shaping COMPENSATION
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An adjustment method for active reflector of large high-frequency antennas considering gain and boresight 被引量:7
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作者 Cong-Si Wang Lan Xiao +6 位作者 Wei Wang Qian Xu Bin-Bin Xiang Jian-Feng Zhong Li Jiang Hong Bao Na Wang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2017年第5期39-50,共12页
The design of the Qitai 110 m Radio Telescope(QTT) with large aperture and very high working frequency(115 GHz) was investigated in Xinjiang, China. The results lead to a main reflector with high surface precision... The design of the Qitai 110 m Radio Telescope(QTT) with large aperture and very high working frequency(115 GHz) was investigated in Xinjiang, China. The results lead to a main reflector with high surface precision and high pointing precision. In this paper, the properties of active surface adjustment in a deformed parabolic reflector antenna are analyzed. To assure the performance of large reflector antennas such as gain and boresight, which can be obtained by utilizing an electromechanical coupling model, and satisfy them simultaneously, research on active surface adjustment applied to a new parabolic reflector as target surface has been done. Based on the initial position of actuators and the relationship between adjustment points and target points, a novel mathematical model and a program thatdirectly calculates the movements of actuators have been developed for guiding the active surface adjustment of large reflector antennas. This adjustment method is applied to an 8 m reflector antenna,in which we only consider gravity deformation. The results show that this method is more efficient in adjusting the surface and improving the working performance. 展开更多
关键词 adjustment reflector antenna pointing deformed utilizing gravity adjusting considering guiding
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High Gain of UWB Planar Antenna Utilising FSS Reflector for UWB Applications 被引量:3
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作者 Ahmed Jamal Abdullah Al-Gburi Imran Bin Mohd Ibrahim +3 位作者 Zahriladha Zakaria Badrul Hisham Ahmad Noor Azwan Bin Shairi Mohammed Yousif Zeain 《Computers, Materials & Continua》 SCIE EI 2022年第1期1419-1436,共18页
In this paper,a high gain and directional coplanarwaveguide(CPW)-fed ultra-wideband(UWB)planar antenna with a new frequency selective surface(FSS)unit cells design is proposed for UWB applications.The proposed UWB ant... In this paper,a high gain and directional coplanarwaveguide(CPW)-fed ultra-wideband(UWB)planar antenna with a new frequency selective surface(FSS)unit cells design is proposed for UWB applications.The proposed UWB antenna was designed based on the Mercedes artistic-shaped planar(MAP)antenna.The antenna consisted of a circular ring embedded with three straight legs for antenna impedance bandwidth improvement.The modelled FSS used the integration of a two parallel conductive metallic patch with a circular loop structure.The FSS provided a UWB stopband filter response covering a bandwidth of 10.5 GHz,for frequencies from 2.2 to 12.7 GHz.The proposed FSS had a compact physical dimension of 5 mm×5 mm×1.6 mm,with a printed array of 19×19 FSS unit cells.The FSS unit cells were printed on only one side of the dielectric FR4 substrate and placed as a sandwich between the antenna and the reflector ground plane.An equivalent circuit configuration(ECC)was used to verify the FSS unit cell structure’s performance.The simulated results indicated that the UWB MAP antenna and FSS reflector provided a fractional bandwidth of 136%and a high gain of 11.5 dB at 8.5 GHz with an acceptable radiation efficiency of 89%.Furthermore,the gain was improved across the operating band and kept between 8.3 and 11.5 dB.The proposed antenna was in good agreement between theoretical and experimental results and offered a wide enough bandwidth for UWB and vehicle applications. 展开更多
关键词 UWB MAP antenna stable gain FSS reflector ECC stopband response reflection phase
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Thermal Distortion Compensation for Improving Electrical Performance of Reflector Antennas 被引量:1
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作者 Jiamei Kang Wei Wang +2 位作者 Shuo Zhang Shaofan Lian Hong Bao 《Open Journal of Applied Sciences》 2021年第4期523-540,共18页
Aiming at the problem of the surface accuracy and electrical performance of the antenna in space environment are reduced due to thermal deformation caused by temperature load. This paper presents a method to compensat... Aiming at the problem of the surface accuracy and electrical performance of the antenna in space environment are reduced due to thermal deformation caused by temperature load. This paper presents a method to compensate the thermally induced shape distortion of antenna reflector by actively adjusting actuators in order to improve the electrical performance. The adjustment of each actuator is related to the local deformation of the panel. Then, taking a space deployable antenna with a diameter of 5 meters as an example, the finite element model is established. According to the range of the temperature variation in space (<span style="white-space:nowrap;">&#8722;</span>180<span style="white-space:nowrap;">&#176;</span>C - 200<span style="white-space:nowrap;">&#176;</span>C), different temperature loads are applied to the antenna. The variation of electrical properties and surface accuracy is analyzed and the worst working condition is determined, and the antenna is compensated based on this condition. Then, four different electrical performance parameters are used as the optimization objectives, and the electromechanical coupling optimization model is established, and the PSO algorithm is used to optimize the actuators adjustments. The results show that the method can effectively improve the electrical performance of the deformed reflector antenna. 展开更多
关键词 Space reflector antenna Thermal Distortion Active Compensation Electrical Performance PSO
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Lightweight Design of Spaceborne CFRP Rigid Antenna Reflector 被引量:1
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作者 ZHOU Tao LIANG Yanmin +3 位作者 WU Wenping WU Xinrui YE Zhoujun DONG Bin 《上海航天(中英文)》 CSCD 2022年第1期137-149,共13页
In order to overcome the shortcoming of space-borne rigid antenna reflector made of carbon fiber reinforced plastic(CFRP)skins with aluminum honeycomb sandwich(SAHS)structure,a new type of full CFRP skin plus rib(SPR)... In order to overcome the shortcoming of space-borne rigid antenna reflector made of carbon fiber reinforced plastic(CFRP)skins with aluminum honeycomb sandwich(SAHS)structure,a new type of full CFRP skin plus rib(SPR)structure ring-focused parabolic surface antenna reflector with the size of 2.5 m×1.9 m is designed.Under the condition that the original caliber,surface type,and interface remain unchanged,the main influence factors are designed and controlled.First,from the perspective of high stiffness,lightweight,and easy to form,a finite element simulation software is used to analyze and optimize the layout of the rib,the cross-sectional shape of the rib,the size of the rib,and the matching of the size and the coefficients of thermal expansion(CTEs)of the rib and the skin.Second,two structures are prepared by the autoclave molding process.Third,the weight and the surface precision root mean square(RMS)value are measured.The results show that the fundamental frequency of the SPR structure is 142.2 Hz,which is 3.5 Hz higher;the number of the new structural parts is reduced by 40%,and the forming process is greatly simplified.The total weight of the new structure is 11.9 kg,lighter 42.5%,indicating that the weight loss is obvious.The RMS value is 0.15 mm,which is slightly lower 0.01 mm but satisfies the accuracy requirement not greater than 0.3 mm.It is proved that the SPR structure reflector is a superior structure of the lightweight spaceborne antenna reflector. 展开更多
关键词 antenna reflector skin plus ribs structure carbon fiber reinforced plastic(CFRP) finite element LIGHTWEIGHT
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Gradient-based optimization method for producing a contoured beam with single-fed reflector antenna
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作者 LIAN Peiyuan WANG Congsi +2 位作者 XIANG Binbin SHI Yu XUE Song 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2019年第1期22-29,共8页
A gradient-based optimization method for producing a contoured beam by using a single-fed reflector antenna is presented. First, a quick and accurate pattern approximation formula based on physical optics(PO) is adopt... A gradient-based optimization method for producing a contoured beam by using a single-fed reflector antenna is presented. First, a quick and accurate pattern approximation formula based on physical optics(PO) is adopted to calculate the gradients of the directivity with respect to reflector's nodal displacements. Because the approximation formula is a linear function of nodal displacements, the gradient can be easily derived. Then, the method of the steepest descent is adopted, and an optimization iteration procedure is proposed. The iteration procedure includes two loops: an inner loop and an outer loop. In the inner loop, the gradient and pattern are calculated by matrix operation, which is very fast by using the pre-calculated data in the outer loop. In the outer loop, the ideal terms used in the inner loop to calculate the gradient and pattern are updated, and the real pattern is calculated by the PO method. Due to the high approximation accuracy, when the outer loop is performed once, the inner loop can be performed many times, which will save much time because the integration is replaced by matrix operation. In the end, a contoured beam covering the continental United States(CONUS) is designed, and simulation results show the effectiveness of the proposed algorithm. 展开更多
关键词 reflector antennaS SINGLE FEED contoured BEAM gradient-based optimization method.
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Electromagnetic performance analysis of reflectorantennas with non-uniform errors along radius
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作者 Peiyuan Lian Congsi Wang +1 位作者 Wei Wang Binbin Xiang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2016年第5期961-967,共7页
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 descri... 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. 展开更多
关键词 reflector antenna surface weighting function antennatolerance quality evaluation.
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The Design of an Elliptical Reflector in the Gaussian-like Antenna Used in HT-7 ECRH System
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作者 张丽霞 方瑜德 杨坤 《Plasma Science and Technology》 SCIE EI CAS CSCD 2002年第6期1573-1578,共6页
The structure of the antenna which will be used in HT-7 tokamak electron cyclotron resonance heating (ECRH) experiment and the design of its key component (the elliptical reflector) were introduced. A quasi-Gaussian T... The structure of the antenna which will be used in HT-7 tokamak electron cyclotron resonance heating (ECRH) experiment and the design of its key component (the elliptical reflector) were introduced. A quasi-Gaussian TE11 wave sent from the TE01-TE11 mode converter was reflected by two mirrors from the waveguide aperture to the plasma center area. One of the two mirrors is a plane mirror and the other is an elliptical mirror. In this process, the wave beam will be converged by the two reflecting mirrors and the emissive direction of the wave is also controlled by them. As requested physically for ECRH experiment, the arrangement of the two mirrors can ensure the wave to be launched from the low-field side of the tour. 展开更多
关键词 HT-7 tokamak ECRH Gaussian like antenna elliptical reflector
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Radiation Characteristics of the Reflector Antenna with Random Perforated Holes
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作者 董涛 徐晓文 肖疆 《Journal of Beijing Institute of Technology》 EI CAS 2004年第4期378-380,共3页
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 metho... 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. 展开更多
关键词 reflector antenna physical optics(PO) method radiation characteristics random perforated holes
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Analysis and Design of a New Shaped Spherical Reflector Antenna with a Horn Feed
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作者 林岩 黄斌 +1 位作者 朱全福 袁源 《Defence Technology(防务技术)》 SCIE EI CAS 2009年第2期131-134,共4页
A design method of a new shaped spherical reflector antenna with a horn feed for wide-angle scanning is presented,in which the horn's phase center need not be found out and its optimal position can be determined.I... A design method of a new shaped spherical reflector antenna with a horn feed for wide-angle scanning is presented,in which the horn's phase center need not be found out and its optimal position can be determined.It is found from numerical calculation that the shaped spherical reflector antenna has better electrical performance than that of the spherical reflector antenna,at the maximum gain value under the conditions of the same feed and reflector aperture,and can be used as a wide angle searching antenna. 展开更多
关键词 反射面天线 设计方法 球形 饲料 非洲 最佳位置 相位中心 数值计算
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Numerical Techniques Used in Modeling Codes for Dual-Reflector Antenna Design and Analysis
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作者 Wang Welling, Wang Shijin and Chen JingxiongBeijing Institute of Radio Measurement, P. O. Box 3923, Beijing 100854, China 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 1993年第2期63-74,共12页
An user-oriented computer software consisting of three modeling codes, named DRAD, DRAA and FDPAT, is introduced. It can be used to design three types of Cassegrain system: classical, with shaped subreflector and with... An user-oriented computer software consisting of three modeling codes, named DRAD, DRAA and FDPAT, is introduced. It can be used to design three types of Cassegrain system: classical, with shaped subreflector and with dual shaped reflectors, and to analyse radiation patterns for the antennas. Several mathematical models and numerical techniques are presented. 展开更多
关键词 SOFTWARE Numerical technique antenna Dual-reflector antenna Cassegrain system.
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高功率激光辐照下光学天线的像质研究
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作者 李响 吴东宇 +4 位作者 孙梓庭 高亮 安岩 宋延嵩 董科研 《红外与激光工程》 EI CSCD 北大核心 2024年第8期78-88,共11页
离轴两反光学天线在高功率激光系统中起到改变光束直径的作用,而高功率激光加载下所产生的热效应使光学天线的像质劣化,严重影响高功率激光系统的性能。为量化其影响效果,建立了离轴两反光学天线的有限元分析模型,模拟高功率激光作用环... 离轴两反光学天线在高功率激光系统中起到改变光束直径的作用,而高功率激光加载下所产生的热效应使光学天线的像质劣化,严重影响高功率激光系统的性能。为量化其影响效果,建立了离轴两反光学天线的有限元分析模型,模拟高功率激光作用环境,完成了激光加载下的瞬态热分析以及静力学分析,并得到离轴两反光学天线激光加载时间对波前劣化的影响关系。使用齐次坐标变换的方法求解离轴主次镜的刚体位移,具体分析了各项刚体位移随加载时间的变化情况。通过Zernike多项式拟合的方法完成了镜面的波面拟合,将拟合结果导入ZEMAX中,最终得到了该光学天线在平均功率为1 000 W,重频为0.2 Hz,入光直径为30 mm的激光加载300 s下的波前均方差为0.064 6λ。为了进一步验证模型的准确性,使用较低功率(10 W)激光进行原理等效实验,结果表明光学天线在激光加载下实际波像差与模型仿真结果基本相符,偏差小于7.93%,该方法可以有效评价离轴两反天线在高功率激光加载下的像质劣化情况。 展开更多
关键词 激光光学 离轴两反光学天线 瞬态热分析 波像差 高能激光系统 激光热效应
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环境风载荷下大口径反射面天线波束指向分析 被引量:1
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作者 栾天 薛松 +7 位作者 连培园 余佳恒 杜雨轩 王猛 赵武林 卢波 许谦 王从思 《工程设计学报》 CSCD 北大核心 2024年第1期98-106,共9页
大口径反射面天线是深空探测、卫星通信的关键设备。为了不断提高观测性能,天线口径不断增大,进而对天线指向精度的要求越来越高。随着天线口径的增大,天线的刚度降低、迎风面积增大,这会导致天线的柔性变形严重,性能难以保证。为探究... 大口径反射面天线是深空探测、卫星通信的关键设备。为了不断提高观测性能,天线口径不断增大,进而对天线指向精度的要求越来越高。随着天线口径的增大,天线的刚度降低、迎风面积增大,这会导致天线的柔性变形严重,性能难以保证。为探究环境风载荷下大口径反射面天线的柔性变形对电性能的影响,提出了一种天线波束指向分析模型。首先,利用计算流体力学方法对天线表面的风压分布情况进行了数值模拟,得到了天线表面的风压系数。然后,利用风压系数与风速无关的特性,分析了不同风速工况下天线结构变形的规律。最后,根据天线结构变形的特点,分析了天线在不同工作状态下的增益损失、指向偏差等的变化规律。结果表明,所提出的模型可以快速评估大口径反射面天线在风载荷下的变形情况和波束指向特性,这为后续的天线抗风结构设计与系统控制研究提供了理论指导。 展开更多
关键词 反射面天线 风载荷 风压系数 柔性变形 波束指向特性
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基于力密度的径向肋式索膜反射面天线形态设计
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作者 杜雪林 张康 +4 位作者 张瑞翔 刘安民 夏杰 张洪 涂宇 《中国空间科学技术(中英文)》 CSCD 北大核心 2024年第3期136-145,共10页
针对空间索膜结构的初始形态设计问题,提出基于力密度方法和控制索网网格面积大小的方法来对边界拉索张力设计和索网形状设计的天线找形迭代策略。首先将薄膜反射面离散为三角形膜单元,得到膜单元的等效力密度,结合索网结构特点,得到索... 针对空间索膜结构的初始形态设计问题,提出基于力密度方法和控制索网网格面积大小的方法来对边界拉索张力设计和索网形状设计的天线找形迭代策略。首先将薄膜反射面离散为三角形膜单元,得到膜单元的等效力密度,结合索网结构特点,得到索网和薄膜的静力平衡方程。保证索网所有内部索段的张力相等,同时通过控制网格面积大小实现边界索段张力设计。对前索网形状进行设计,根据前索网的抛物面方程,更新前索网自由节点坐标,进而重新调整竖向索张力,同时控制网格面积大小,通过优化迭代过程,实现天线的形态设计。通过径向肋式索膜反射面天线算例表明,该方法能够得到满足形状和张力分布的设计结果。 展开更多
关键词 空间薄膜结构 力密度方法 网格面积 膜单元 形态设计 径向肋式索膜反射面天线
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赋形反射面天线的约束多目标优化设计研究
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作者 杨承坤 王九灵 +2 位作者 杨小凤 杨旋 郭庆功 《四川大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第4期214-224,共11页
赋形反射面天线通常使用单目标优化算法进行设计,当期望波束特性具有多个相互冲突的目标和约束限制时,将无法确保输出最优解.为此,提出了该类天线的约束多目标优化方法 .基于有希望区域优化和自适应约束位移密度估计的思想,设计一种新... 赋形反射面天线通常使用单目标优化算法进行设计,当期望波束特性具有多个相互冲突的目标和约束限制时,将无法确保输出最优解.为此,提出了该类天线的约束多目标优化方法 .基于有希望区域优化和自适应约束位移密度估计的思想,设计一种新型双种群协同进化约束多目标优化算法DPBE,在基准测试套件与其他3种主流算法的对比表明,该算法具备更强的全局寻优性与稳定性.将该算法应用于19~21 GHz单偏置抛物反射面天线的平顶波束赋形中,并与单目标优化算法IWO和多目标优化算法NSGA-II-DE在同型初始天线的不同优化模型下进行了性能对比,发现所提方法能在单次运行中满足所有约束条件并取得最佳结果 . 展开更多
关键词 赋形波束 反射面天线 约束多目标优化 协同进化 平顶波束
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Ku/Ka/W三频段单馈源反射面天线设计
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作者 方向 范家熠 汪洁 《现代电子技术》 北大核心 2024年第14期83-88,共6页
为了简化多频段反射面天线的整体结构与体积,设计一个结构简单的三频段馈源,采用单腔体的形式而非复杂的共轴嵌套式或填充介质等方法,以此来精简整个馈源的设计与加工。为了在Ku/Ka两个相近低频段获得较好的隔离度,分别设计了两个低通... 为了简化多频段反射面天线的整体结构与体积,设计一个结构简单的三频段馈源,采用单腔体的形式而非复杂的共轴嵌套式或填充介质等方法,以此来精简整个馈源的设计与加工。为了在Ku/Ka两个相近低频段获得较好的隔离度,分别设计了两个低通的三阶滤波器。使用ANSYS HFSS电磁仿真软件进行Ku/Ka/W三频段单馈源反射面天线设计和优化分析。实际测量时,馈源三个端口的S参数采用矢量网络分析仪测得,馈源及反射面天线系统的增益则在暗室中测量得到。天线仿真设计和实测结果表明,在Ku/Ka/W三个常用频段,即14.5~15.5 GHz、34.5~35.5 GHz及93~95 GHz频率范围内,天线的电压驻波比均小于1.3,各个端口隔离度优于40 dB,具有代表性的三个中心频率点14.5 GHz、35 GHz、94 GHz的天线增益分别为30.5 dBi、34.6 dBi和39.7 dBi,交叉极化优于-23.9 dB,旁瓣电平优于-21.6 dB。所设计的反射面天线实现了频段跨度接近6.5∶1的Ku/Ka/W三频段特性。 展开更多
关键词 反射面天线 三频段 单馈源 三阶滤波器 面对称结构 频点测试
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