短波对数周期偶极天线阵波束覆盖范围测试方法  

A Testing Method for Beam Coverage Area of Shortwave Log-period Dipole Antennas Array

作　　者：梁高波 唐新强 覃小虎 

机构地区：[1]中国洛阳电子装备试验中心,河南洛阳471003

出　　处：《通信对抗》2015年第2期27-31,共5页Communication Countermeasures

摘　　要：波束覆盖范围作为短波装备的一项关键指标,由于天线阵列尺寸大、波束指向仰角高、短波天波信号传输受电离层变化影响严重、信号测量受影响因素多,存在难以实施视距条件下直接测试、远距离测试布站选择难度大、多点测量精度需保持高度一致等难题。为此,在分析对数周期偶极天线阵特性、短波天波传输影响因素、短波信号测量影响因素的基础上,初步提出了"波束电扫、单点多频快速短时测量和波束合成理论修正相结合"的波束覆盖范围测试方法,预先选定波束覆盖中心作为地面测试点位,并通过调整天线阵合成波束的指向,使波束边缘覆盖地面测试点位,利用单套测量系统对波束中心、波束边缘的信号进行同步、异频、快速测量,并考虑天线阵合成波束指向调整时的辐射损耗,以获取短波对数周期偶极天线阵的波束覆盖范围。As a key index of shortwave equipment, the coverage area of the antenna beam is difficult to test for the big size of antenna array, the high elevation of antenna beam, the bad influence of change of ionosphere in transmission of shortwave signals, and influence factors in measuring signal. Thus, there are several difficult prob- lems to be solved, such as test conditions for range of visibility, deploying test stations in wide area, consistent measure precision between test stations, and so on. In this paper, the characteristic of the LPDAA, the influence of sky shortwave trasmission and the measurement fators of shortwave singals are studied firstly. Then, a method of measuring the coverage area of the antenna beam is given, which combine the antenna beam scanning elec- tronically, measuring the single quickly on multi-frequencies in short time on single point, and amend the beam synthetic theory. In this method, you should choose the antenna beam coverage center as the test location, then make the beam coverage edge cover the test location by adjusting the point of the antenna array combinatorial beam. Througn testing the singal at the beam centre and beam edge synchronously and fastly on different fre- quencies by using a single measure system, considering the radiate loss of the combinatorial beam when you adjust its point, in the end, the beam coverage of LPDAA is obtained.

关 键 词：短波 对数周期偶极天线阵 波束覆盖范围 测试 

分 类 号：TN82[电子电信—信息与通信工程]