If a more flexible antenna pattern is needed, the flex radiator with separate contact pins can be used. 如果一个更灵活的天线模式时,散热器的弯曲带独立联系针都可以使用。
Based on the principles that lateral offset-focus feed makes the antenna pattern deflect an angle, the multi-beam antenna can be used in passive imaging system. 本文首先分析了焦平面阵列馈源横向偏焦产生多波束的原理,并采用面电流法对偏焦抛物面天线方向图进行了编程计算。
Antenna pattern automatic recorder 天线波瓣自动记录仪
Analysis of Airborne Antenna Pattern Using Hybrid Golden Section Method and UTD In the optimization of a mine ventilation network, the boundary overstepping took place in Golden Section Search. 黄金分割法结合UTD计算机载天线方向图在复杂矿井通风网络优化计算中,发现了黄金分割法的越界现象。
The wide accumulating azimuth angle is one of the main characteristics of low frequency UWB SAR, so the effect of the antenna pattern on the system performance cannot be neglected. 低频UWBSAR系统具有较大的方位向积累角,天线方向图非均匀性对系统性能的影响不能忽略。
Analysis of Array Antenna Pattern Amplitude in Uniform and Taper Distribution 阵列天线幅度均匀分布和锥削分布方向图分析
A double population genetic algorithm ( DPGA) is presented and applied to synthesize the array antenna pattern by controlling only the current amplitudes. 提出一种双种群遗传算法(DPGA)优化阵元电流幅度,以实现对阵列天线方向图的综合。
Calibration Algorithm for the Antenna Pattern of Low Frequency UWB SAR 低频UWBSAR天线方向图校准算法
Taking a circular aperture exponential distribution as an example, the radiation specification of different test distances is calculated, thus the effect of measurement distance on antenna pattern sidelobe specification is investigated. The relationship curve of the first sidelobe measurement error versus measurement distance is given. 以圆口径指数型分布为例,计算了在不同测量距离下的辐射特性,从而研究了测量距离对天线方向图旁瓣特性的影响,给出了第一旁瓣测量误差与测量距离的关系曲线。
In this paper, an array antenna pattern synthesis based on a real-valued genetic algorithm is presented. 给出了一种基于实数编码遗传算法的天线方向图综合方法。
Above all, some methods of inflight antenna pattern measurements for spaceborne SAR are discussed in this paper. 论文首先对当前国际上几种星载SAR天线方向图在轨测试方法,包括反射器测量方法,均匀分布目标测量方法,地面接收机测量方法,地面发射机测量方法和外部特性因子测量方法,进行了分析研究。
Inflight measurement of antenna pattern is a key technology of spaceborne SAR calibration. 天线方向图在轨测量是星载SAR定标技术的关键部分。
Subprograms were combined into integrated measuring system for antenna pattern in the end. 最后将子程序融合形成了完整的方向图测量系统。
According to the relation ship of the antenna pattern and the aperture field, the mechanism of how the aperture distribution affects the antenna sidelobe level is analyzed and discussed through theoretical analysis and simulation calculation. 该文根据天线方向图与其口径场之间的关系,通过理论分析和仿真计算,分析、讨论了口径场分布影响天线副瓣性能的主要机理。
Weighting effect of real antenna pattern will improve the SNR in MP. 实孔径天线方向图的加权效应会影响多视处理对信噪比的改善程度。
Study of the Airborne Antenna Pattern 机载天线辐射方向图研究
First this paper discusses the research background, the basic theory ( comprise adaptive zero controlling theory of antenna pattern, adaptive filter theory basing on LMS algorithm) and realizing means; 在文中首先阐述了天线旁瓣相消技术的研究背景,基本原理(包括天线方向图零点自适应控制原理、LMS自适应滤波器原理)和实现途径;
Accurate measurement of antenna pattern is important to spaceborne SAR image application, and distributed target antenna pattern measurement is widely concerned. 天线方向图的准确测量,对星载SAR图像的应用具有重要作用。分布目标辐射定标在星载SAR天线方向图测试中受到广泛重视。
In this paper, with the relationship between received signal space and scene space, the effect of the antenna pattern on the system performance is discussed using the imaging model. 本文首先给出接收信号空间和场景空间的对应关系,结合成像模型定性地讨论了天线方向图对系统冲激响应的影响。
A new method of the signal processing is described in this paper to improve the radar azimuth resolution by deconvolution between the antenna pattern and azimuth echoes of targets on scanning the antenna. 本文介绍了一种新的信号处理方法:对天线方向图和天线扫描时产生的目标方位回波通过去卷积来提高雷达的方位分辨率。
Antenna Pattern Loss Analysis of Bistatic Radar 双基地雷达天线方向图损失分析
The radar antenna pattern gotten by measuring amplitude of signal is dynamic. 雷达天线连续旋转时,用幅度法测量的是动态方向图。
Then based on this design, varactor diode is adopted in the reconfigurable antenna, and continuous alteration of antenna pattern and gain is achieved. 接着以此为基础,将变容二极管用于方向图可重构天线的设计,实现了天线方向图和增益的连续可调。
By studying on the model of Antenna Pattern, this paper simulated the single and sum-difference beam pattern of phased-array radar which works on single pulse angle measuring. 然后介绍了相控阵雷达天线方向图模型,仿真了测角体制相控阵雷达天线单波束以及和差波束方向图。
Secondly, the effects of antenna pattern on system performance and extraction methods of antenna pattern are discussed. 其次给出了天线方向图对系统性能影响的评估,天线方向图的提取方法。
From the basic theory of Physical Optics method, the spherical wave is supposed as the incident, the antenna pattern and Doppler frequency shift effect on the moving target are considered. 从物理光学法的基本理论出发,以球面波为入射波,综合考虑了天线方向图和运动目标多普勒频移的影响。
The Omni-direction of the antenna pattern of the improved four-element antenna array in this paper is better. 本论文所设计的改进四元天线阵的辐射的全向性更好一些。
Meanwhile, we discuss power inversion algorithm model, infer and improve the algorithm. The improved algorithm makes the zero in antenna pattern deeper and widener. 讨论了功率倒置自适应算法的模型,推导了算法,并对算法进行了改进;改进的算法使天线在波束图上形成的零陷进一步加深和加宽。
In this paper the problem of I/ Q error and the effect of antenna pattern are studied in the section of system calibration. 本文在系统校正部分对IQ误差问题和天线方向图对回波数据的影响进行了研究。