摘要
针对数字阵列天线的发展需求,介绍了用快速傅里叶变换法、数字混频低通滤波法、多相滤波正交下变频法等3种数字接收机通道内信号的幅度、相位计算方法,给出了数字阵天线接收通道的内校准法和外校准法,以及校准后的天线方向图计算公式,并用实验结果检验了上述方法的有效性。
Based on the requirement of development of digital array antennas, the methods of the fast fourier transform, digital lowpass filtering and quadrature polyhase filtering for calculating the amplitude and phase of IF signal received by the digital receiver are introduced. The internal and external calibrations for receiving channels of a digital array antenna are illustrated. The formula of synthesizing an antenna pattern is also developed. Several Experiments verify the effectiveness of the methods and the formula.
出处
《现代雷达》
CSCD
北大核心
2011年第2期66-69,共4页
Modern Radar
关键词
数字阵列天线
数字波束形成
通道校准
数字天线测量
digital array antenna
digital beamforming
channel calibration
digital antenna measurement
