波瓣宽度

分析结果表明半圆柱型基阵在波瓣宽度和增益上满足系统对无人机的探测要求。

As a result , the beam width and gain of the half cylinder array are enough for the system to detect the UAV .

并与无形变反射面天线的方向图曲线相比较，总结了天线电特性，如副瓣电平，半功率波瓣宽度和交叉极化电平等，随形变面积，形变位置和形变幅度变化的规律。

Compared to the reflector antenna without distortion , some radiation characteristics , such as side-lobe level , half power beam width and cross-polarization level , are discussed .

所有线阵的E面和H面半功率波瓣宽度分别在15~25°之间和65~75°之间。

The E-plane and H-plane half power beamwidths of all linear arrays are 15 ~ 25 ° and 65 ~ 75 °, respectively .

其次，利用Matlab仿真了输入信号频率、阵元个数、阵元间距以及输入信号的延迟等因素对线阵列扬声器指向性的波瓣宽度、旁瓣和方向的影响。

Secondly , we use Matlab to simulate the directive property of beam-width , side-lobe and beam-direction of linear loudspeaker arrays in different parameters such as the frequency of input signal , the number and distance between elements and the signal delay .

测试结果表明该天线工作在6GHz左右，带宽（S11<-10dB）约为11%，E面和H面的3dB波瓣宽度分别为57o和70o，可用带宽内增益约为8dBi。

The tested two-layer antenna works at 6.1 GHz with a bandwidth ( S11 ≤ - 10dB ) of about 11 % , 8-dBi gain . The 3-dB beamwidth in the E-plane and H-plane is 57o and 70o , respectively .

一种低空雷达垂直波瓣宽度展宽方法及实现

A Method and Implementation of Expanding Vertical Beam-wide of a Low Altitude Radar

其次对两种不同排列形式的阵列进行了比较分析，确定了能提高雷达角度分辨率的具有较窄波瓣宽度分布形式的阵列作为雷达标签的最终形式。

The comparison of two arrays in different arranged was carried out and then the array with narrow lobe width as the final radar label array which could improve the resolution of radar .

最后，用波束优化思想对馈源尺寸及位置进行不断调整，从而使各波束半功率波瓣宽度及偏焦角度达到设计要求，并给出了各组波束方向图。

Finally , based on the concept of beam optimization , the size and position of reflector feeds are modified to meet the requirements . The radiation patterns of each beam are also given .

多通道幅相误差不仅会影响天线方向图的天线增益、波瓣宽度、副瓣电平，而且会降低接收的信噪比，严重影响空域滤波效果。

The amplitude and phase errors among the channels not only influence the antenna gain , beam width and sidelobe level , but also debases the signal-to-Noise , influence the effects of airspace filter .

根据实际要求，设计一副水平面波瓣宽度为45°的基站阵列天线，讨论天线尺寸与性能指标的关系，对天线进行测试，达到了设计要求。

Based on the requirement , a base station array antenna of which beam width in H-plane is 45 is made . The relationship between the size and the performance of array antenna is researched . The antenna is tested and is proved eligible .