As the vigorous development of the mobile communication technology , the research of the dual - band dual - polarized antenna is very urgent . it is also of theoretical significance and practical value 随着移动通信技术的发展,对双频双极化基站阵列天线的研究就变得十分迫切,同时也具有理论意义和实用价值。
The object functions for synthesis of array antennas usually have the characteristics of multi - parameters , non - differentiable even discontinuities . the optimization of pattern function is non - linear problem 阵列天线的综合问题大多呈现多参数、不可微、甚至不连续的特性,其方向图参数的最优化是一种非线性优化问题。
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。
A nulling algorithm based on a modified genetic algorithm , which is a feedback algorithm decided by power , presented can suppress jamming in the direction different from that of signals effectively 摘要提出了一种阵列天线干扰抑制的改进遗传算法，在射频端基于功率判决直接通过调节权系数进行波束合成，可以有效地抑制与信号方向不同的干扰。
In chapter one the present studies on anti - interference utilizing adaptive array is reviewed and the problems which are important in adaptive array realization such as reference signal generation and afc are pointed out 全文共分六章：第一章概述了当前阵列天线抗干扰技术的现况以及阵列天线实用化所必须解决的问题：参考信号提取和afc问题。
The previous discussion addressed the theory required to compute the relative phase shift between adjacent radiating elements in order to position the beam of an array - type antenna to a specific angle off of the antenna boresight axis 前面的讨论中给出了计算使阵列天线的波束相对天线视轴线偏移一个给定角度所需的相邻单元间相对相移的理论。
With the development of radar technology , the intrinsic defects of traditional antenna array greatly restrict the system performance ; therefore research on the compact receiving array of hfswr becomes urgency 随着雷达技术的发展,传统大型阵列天线固有的缺点已经成为了制约系统性能的一个瓶颈。因此亟需开展高频雷达小型化阵列天线的研究工作。
Thus the main and auxiliary polarization radars form a side lobe canceller system . based on the modeling of this system , an anti - jamming filter algorithm in the polarization - spatial domain is brought forward 针对接收全极化雷达,在其旁边放置全向双极化正交阵列天线与雷达构成旁瓣对消系统,并根据系统模型提出了极化域-空域联合滤波抗干扰算法。
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 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。
By dividing the large array antenna into a set of virtual subarray antennas , the receivers are connected to each subarray via a program - controlled switch based on time - division - multiplexing , and process the output snapshots on the subarray - antenna 阵列天线划分为虚拟子阵列，基于时分复用工作方式，通过程控交换矩阵与接收机连接，接收机对不同虚拟子阵列天线输出信号分时进行接收处理。
