您要查找的是不是：
- main lobe frequency 主瓣频率
- The actual-3 dB main lobe width is a bit wider than in the ideal case that neglects the element size. 结果表明:阵元宽度对主瓣半功率点宽度的影响非常有限,而且不同的阵元宽度造成的半功率点宽度之间的差异也很小。
- Main lobe offset frequency cancellation 主瓣偏频对消
- At last,a simulation example of main lobe clutter power for low altitude and ... 最后给出了一低空远界理论弹道主瓣杂波功率的仿真样例。
- For short biphase codes,the main lobe to sidelobe ratio of pulse compression is low,so sidelobe suppression is necessary. 二相码信号是一类常见的脉冲编码信号,但码较短时,匹配滤波的主副比不高,需要采用旁瓣抑制技术。
- Based on uniform line array,the sonar equation of active sonar beam main lobe and side lobe interfered by noise-jammer are presented. 研究了噪声干扰器对鱼雷主动声呐的对抗原理,以等间隔直线阵为例,分别给出了干扰器对鱼雷主动声呐主瓣和旁瓣的干扰方程。
- The directivity of forming beam are prominent, the width of main lobe is distinct, and producing wavy plan with more powerful, which make for scanning in space. 形成波束指向性突出，主瓣宽度明显，延时产生的波阵面能量较强，有利于空间扫描。
- The result reveals that small geometric focal length and large angle may decrease the -3dB focal area, and increase length to width ratio and the pressure magnitude of main lobe. 由结果得知，曲率半径愈小张角愈大会导致烧灼面积减小、长宽比增加以及压力主峰值的提高。
- Virtually LPI guide radar is a radar which stacks up against with ESM receiver of target in system detection sensitivenes,therefore in the system design it should consider the technology measures emphaticaly to ensure its antenna main lobe LPI capability. LPI制导雷达实质上是一种从系统上与目标的ESM接收机进行探测灵敏度较量的雷达,因此在系统设计上应着重考虑使其天线主瓣LPI的技术措施。
- This method more effectively suppresses spatial nonstationary and stationary noise than the adaptive null-forming beamformer method by using a rotatable main lobe in the 2-D plane. 该方法克服了自适应零限波束形成只能抑制空间相干噪声的缺点,并得到可在二维平面上旋转的波束主瓣。
- In the other hand, after pulse compression processing, the output signal's main lobe will be extended and its amplitude or phase will be modulated, and the range resolution will descend too. 由于信号带宽的损失，脉压输出回波信号的主瓣展宽，距离分辨力下降；另外，主瓣幅度或相位还会受到调制。
- Simulation results show that with 13 unit lasers, a beam with the flatness of less than 1% in the optimizing region can be achieved.The main lobe contains over 95% of the total power. 计算结果表明：13个单元光源所合成的远场光束可在优化区域内达到平坦度小于1%25，对应主峰包含95%25以上的总能量。
- IJF coding refers to converting digital baseband signal into Intersymbol Interference and Jitter Free baseband signal.It has the features of narrower spectral main lobe and faster roll off. IJF编码是一种将基带信号转换为无符号间干扰和抖动的信号，其主瓣窄，频谱滚降快。
- The main impediment to growth is a lack of capital. 影响发展的主要障碍是缺乏资本。
- Crowds thronged the main square of the city. 城里的大广场上挤满了人群。
- The whole school (was) assembled in the main hall. 全校在大礼堂集合。
- The main feature on the program is her song. 那个节目的主要号召物是她的歌。
- Fables often have animals as the main characters. 寓言常以动物为主角。
- A heavy snowfall block the main road. 一次严重的降雪阻塞了主要公路。
- The gas main explode and set fire to the house. 煤气总管爆炸引起房子失火。
