发射多波束的非线性功放影响分析  

The Analysis to the Effect of Nonlinear Power Amplifier on Transmitting Multibeam

作　　者：魏晨[1] 李会勇[1] 谢菊兰[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731

出　　处：《雷达科学与技术》2013年第6期658-662,共5页Radar Science and Technology

基　　金：中央高校基本科研业务费(No.ZYGX2012J018);国家自然科学基金(No.61371184);四川省应用基础研究计划项目(No.2013JY0004)

摘　　要：随着雷达通信系统的要求越来越多样和复杂,多功能相控阵雷达的应用已经成为一种趋势,而数字多波束技术正是其主要的技术手段之一。对于发射系统来说,实现发射多波束存在的难点之一就是功放的非线性会对多波束的形成造成影响。因此,分析了发射多波束在无记忆的非线性功放中受到的影响,主要研究了功放的非线性影响的根源,从波束图和期望信号与干扰信号功率比的角度,将非线性对多波束的影响进行了理论分析和仿真,为实际工程中的功放设计提供了依据。With increasingly diverse and complex requirements on radar system, the application of mul tifunction phased array radar has become a trend, and multi beam technique is exactly one of the main tech- niques. For the transmitting system, one of the difficulties of the realization of transmitting multi beam is that a nonlinear power amplifier（PA） will affect the formation of multi-beam. Therefore, we analyze the effect of nonlinear PA on the transmitting multi beam. We study the source of power amplifier no^linear effects and simulate the effect of nonlinear PA on the beam pattern and the signal-to-interference power ratio, which provides an evidence of design PA in practical engineering.

关 键 词：多功能相控阵雷达 发射多波束 功放非线性 波束图 

分 类 号：TN957.3[电子电信—信号与信息处理]