| 1. | Antenna pattern discrimination
天线方向图鉴别 |
| 2. | The precise measurement of microwave antenna pattern with lock in amplifier
利用锁定放大器实现微波天线方向图的精确测量 |
| 3. | A main mission of antenna pattern synthesis is to determine the array ’ s excitation coefficients
天线方向图综合的一项主要任务,是确定阵元的激励系数。 |
| 4. | 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。 |
| 5. | Finally , the information process model of the low frequency uwb - sar is given , and antenna pattern and the impulse response function of the system are discussed
最后研究了低频uwb - sar系统信息处理模型。利用该模型分析了天线方向图和系统的冲击响应函数。 |
| 6. | Based on the analysis of the radar echo , we built up the sar echo simulation models , including map model , motion model , antenna pattern model and imaging model
在此基础上，建立了sar回波信号的仿真模型，包括地形图仿真、载机机动仿真、天线图仿真等的模型。 |
| 7. | The measured single antenna patterns are quite different from simulated ones , which may be caused by improper measurement . the gain of the single antennas are between 4 . 4dbi and 7 . 1dbi
贴片单元实测方向图与仿真结果相差较大,疑与测试方法不当有关;单元增益在4 . 4dbi ~ 7 . 1dbi之间。 |
| 8. | In this paper , a synthesis method is studied to produce the shaped beam patterns . this method is based on the fact that synthesis of antenna patterns is equivalent to minimizing a certain function
本文重点研究了一种赋形波束功率方向图的综合算法，并以赋球波束为例分别讨论了等间距线阵和方阵的综合过程。 |
| 9. | This can be realized with lots of methods . the paper applies genetic algorithm ( ga ) to antenna pattern synthesis . the existing pattern synthesis methods are combined with ga to antenna pattern synthesis
本文在已有方向图综合方法的基础上,引入了遗传算法,并把遗传算法与已有方法相结合,用于阵列天线方向图的综合。 |
| 10. | On the assumption that a cabin and a horn antenna were under the bottom of an airplane , fdtd method was applied to analyze the antenna patterns which are generally affected by the body of the airplane
摘要假定飞机腹部加装了某一形状的炮舱和矩形喇叭天线，用时域有限差分法( fdtd )分析了这样的外形对天线辐射特性的影响。 |
