某天线翻转平衡机构设计

介绍了某车栽天线翻转机构的一种平衡设计思想和扭杆弹簧平衡机构的设计方法，实现了天线翻转机构在较大不平衡力矩下的小功率驱动。以及平衡设计效能的评定和安全性考虑。     

某车载高机动雷达天线阵面结构设计

设计一种带有被动翻转天线单元的天线阵面，天线单元通过一种联动机构随天线阵面的展/收状态而实时改变自身状态，以实现高机动车载雷达天线阵面系统的自动架/撤功能，并通过力学仿真分析验证了天线骨架结构设计的合理性。     

某雷达天线举升翻转机构的设计

针对某一机动型大阵列天线的举升翻转机构设计进行了详细的论述,着重介绍了该机构中以液压油缸作为驱动力的四连杆结构形式的翻转机构和由直线导轨和液压油缸组成的举升机构以及由螺旋机构、摩擦片组成的锁定机构的工作原理和结构设计。机构在系统设计中,采用了刚性同步原理,以实现两套翻转机构、举升机构间的同步翻转和拳升的运动过程。此外,还对该机构的液压系统的设计进行系统的阐述和论证。该机构已成功地应用于某机动式中远程三坐标雷达的结构设计中。     

机载雷达驱动机构的刚度分析计算

天线驱动机构(又称天线座)作为雷达系统中的驱动单元,它的固有频率影响到天线座伺服带宽.以前对天线座固有频率的计算及分析很少考虑到驱动机构中运动副(轴承)对整个天线座刚度的影响,本文通过对某机载雷达天线座刚度的分析计算看到,轴承刚度对天线座固有频率产生的影响.     

某升高雷达天线的运输与架设

介绍某升高雷达扭力杆翻转滑动机构设计及在天线撤收运输、架设工作中的应用，并说明雷达天线在撤收运输与架设工作中应注意的问题。     

温度对某雷达翻转机构影响分析

本文分析了温度变化对某雷达翻转机构液压系统的影响,提出了解决措施并进行了实验验证,实验表明通过采取这些措施后,可以彻底解决环境温度变化引起翻转机构碰撞天线问题.     

某型号天线座壳体强度刚度有限元分析

根据该型号雷达天线座图纸，进行了适当的简化，建立了天线座的有限元模型。同时，运用ANSYS分析软件，按工作状态和保全状态两种受力状态进行了强度与刚度校核，不仅从理论上验证了天线座换材料后在任何一种状态下都是满足设计条件的，而且为今后的天线座设计工作提供了有指导意义的依据。     

大角度折叠机构的系统设计

通过多种雷达折叠机构的方案分析,设计了一种180°大角度天线折叠机构,此机构集翻转、定位、锁紧等功能于一体,可以作为一种通用化的折叠机构被机动性大阵面雷达所借用.同时,通过对机构折叠原理的分析、负载的计算、液压参数的选择以及重复精度的保证等各个方面的分析,证明此折叠机构在大型雷达阵面的翻转应用中是可行的.另外该套系统以液压为动力源,方案根据锁紧机构的锁紧力和解锁力的大小不同,合理的设计液压管路,保证了整套机构的可靠安全工作.该套机构经过样机的长时间烤机使用,目前性能状况优良,达到了设计指标要求,满足使用.     

从铰链致动机构到用于欧洲大型通信卫星的天线展开机构

本文描述了从铰链致动机构（ＨＡＭ）到天线展开机构（ＡＤＭ）的发展。该天线展开机构能以可控的方式展开大型卫生附载设备。     

天线座驱动系统扭转振动谐振频率的计算及仿真

介绍了天线系统驱动机构扭转振动谐振频率的计算方法。当考虑驱动机构中齿隙、摩擦等非线性因素时，应用ADAMS动力学仿真软件对天线系统驱动机构的谐振频率进行仿真计算。     

Waveform optimizations for ultrawideband radio systems

Solutions are presented for various optimizations of transient waveforms and signals used in ultrawideband radio systems. These include the transmit antenna generator waveform required to maximize receive antenna voltage amplitude (with bounded input energy), the transmit antenna generator waveform that provides the "sharpest" received antenna voltage waveform, and the transmit antenna generator waveform that maximizes received energy with an inequality constraint on the radiated power spectral density. Using variational methods, general optimization results are derived for arbitrary antennas, including the effects of generator and load impedances, and numerical examples are provided for lossless dipoles and resistively loaded dipoles using moment method solutions. Closed-form results are provided for short dipole antennas for some special cases.     

Das Windenergiepotential in Österreich — seine Erfassung und regionale Verteilung

Starting with the presentation of the at the moment given situation of wind energy use in Austria the wind energy potential is estimated absolutely and relatively to the overall Austrian electricity consumption. The method for the prediction of the energy yield is discussed and the technical and legal constraints for wind energy exploitation are given.     

无载波脉冲探地雷达天线及其实验研究

简要地概述了设计无载波脉冲探地雷达天线的理论依据和方法，并讨论了天线的类型和技术现状。对一种比较实用的无载波脉冲探地雷达天线的近地面工作特性进行了实验测试。结果表明，天线的性能在一定程度上受土壤特性的影响，天线向地下传输的能量与天线距离地面的高度ｈ有很大关系。在ｈ≤４０ｃｍ时，随着天线高度ｈ的升高，天线向地下传输的能量急剧地减小。借助于该实验，还对天线辐射出的无载波脉冲在土壤中的传播特性进行了研究     

3种不同馈电方式的半球面螺旋天线分析

基于曲线基函数的矩量法分析了中心馈电、侧边馈电和顶端馈电的半球面螺旋天线的辐射特性。结果表明,半球面螺旋天线具有较好的阻抗特性和方向图特性,具有较宽的圆极化带宽。顶端馈电的半球面螺旋天线具有较宽的增益带宽,其辐射波束的角度比较宽。半球面螺旋天线具有更低的剖面,可以稳定地固定于反射板上,稳定性强,更加具有实际应用价值,在卫星通信领域有着巨大的应用前景。     

A Theoretical Feasibility Study of a Source Stirring Reverberation Chamber

A novel theoretical feasibility study to reverberate a large metallic chamber is proposed. The method is based on the displacement of a radiating antenna inside the chamber, and the reverberating effect is obtained by coupling the antenna current in different ways with the cavity modes. This technique eliminates mechanical rotating paddles inside the chamber and offers the advantage of a continuous-wave operation compared with the frequency stirring method. The reverberating characteristics of the proposed technique are evaluated by calculating the field statistics. The analyzed situation concerns a real antenna, and its radiation into the reverberation chamber is modeled using Green's function of cavity. The numerical problem is solved by the method of moment. The model has been tested and is able to rigorously characterize the reverberating environment for the design and optimization of antenna configurations to be addressed in future studies.      

三轴卫星天线降低能耗研究

针对三轴遥感卫星天线用户任务逐渐增多,消耗的能源越来越多的现状,简要介绍了天线控制系统的功能和组成。以功耗测试数据为依据,分析了三轴遥感卫星天线的能耗情况,从缩短天线闭环等待时间、第三轴下电抱闸等方面讨论了降低功耗策略和措施,并提出一种智能化力矩偏置控制的设计,通过智能力偏设置电路去除力矩偏置值,有效控制和降低设备的能耗。     

Optimum load for a linear antenna fed by a short duration pulse

An analysis is described to calculate the optimum load which maximizes the radiated electromagnetic field from a linear dipole antenna fed by a very short pulse. For each frequency in the band, the analysis is carried out by solving Pocklington's equation via a Galerkin moment method, together with a variational technique. A constraint on the energy of the radiated signal is used as an isoperimetric condition, so that the solution is physically realizable. The optimum solution is also compared with the response of an unloaded antenna.     

曲线分段的矩量法分析阿基米德平面螺旋天线

从混合位积分方程出发,采用矩量法结合曲线分段的三角基函数和脉冲检验函数分析了阿基米德平面螺旋天线,给出了输入阻抗,电流分布以及辐射方向图结果.从曲线形式的海伦积分方程出发结合折线分段的脉冲基函数点匹配法比较结果与文献[2～4]十分吻合.由于采用了曲线分段,在相同分段数情况下其结果的精度将比采用折线分段的高.     

调频无线电引信扫频波辐照效应研究

为研究调频无线电引信抗电磁干扰性能,开展了调频引信扫频波辐照实验,获得了引信工作状态下的电磁辐照效应规律、能量耦合通道及失效机理。实验表明,当弹体轴线平行于辐射场传播方向时,引信误动作的辐照能量最小;随着扫频频段与引信工作频段偏移量增大,引信误动作所需扫频能量增大。对引信进行改装并做对比实验,发现引信天线是干扰的主要耦合途径。干扰能量通过天线耦合到引信高频电路,引信的工作状态发生改变,从而使引信误动作。     

An aperture-matched compact range feed horn design

The moment method and the uniform geometrical theory of diffraction are used to obtain two separate solutions for theE-plane far field pattern of an aperture-matched horn antenna. This particular horn antenna consists of a standard pyramidal horn with the following modifications: a rolled edge section attached to the aperture edges and a curved throat section. The resulting geometry provides significantly better performance in terms of the pattern, impedance, and frequency characteristics than normally obtainable. The moment method is used to calculate theE-plane pattern and voltage standing-wave ratio (VSWR) of the antenna. However, at higher frequencies, the moment method requires large amounts of computation time. On the other hand, the uniform geometrical theory of diffraction provides a quick and efficient high frequency solution for theE-plane field pattern. In fact, the uniform geometrical theory of diffraction may be used to initially design the antenna; then the moment method may be applied to "fine tune" it. In both methods, a two-dimensionalE-plane model of the antenna is used, but these two-dimensional solutions yield excellent agreement with measured data of the actual three-dimensional antenna. This procedure has been successfully applied to design a compact range feed horn.