摘要
空间功率合成应用广泛,但是其合成效率受到信号的幅相差异、阵元数目等因素的影响。分析了正态分布条件下的幅相差异与阵元数目对合成效率的影响,对给出的空间功率合成的平均合成效率的表达式进行分析。结果表明:幅相差异的影响与空间功率合成系统的阵元数成正比关系;而在幅度差异和相位差异相近时,阵元数目增加时合成效率趋于某一稳定值;增加阵元数目是提高系统增益的最有效方法。
Though spatial power combining technology is widely used,the combining efficiency is affected by signal＇s amplitude difference,phase difference and element number. This article analyzes normal distributed amplitude difference and phase difference＇s influence to theory spatial power combining. It analyzes the average combining efficiency expression of spatial power combining and shows that the amplitude and phase difference influence varies directly with the number of spatial power combining system＇s array element. But as the difference of amplitude and phase is little,combining efficiency tends to a stable value even if array element number increases. The conclusion is got that the most effective method to increase system power gain is to increase array element number.
出处
《火力与指挥控制》
CSCD
北大核心
2015年第11期77-79,共3页
Fire Control & Command Control
关键词
空间功率合成
幅度差异
相位差异
正态分布
合成效率
spatial power combining
amplitude difference
phase difference
normal distribution
combining efficiency
