波导与开口腔体瞬态特性研究  

Study on Wave Guide and Open Cavity Transient Response

作　　者：张安学[1] 师振盛[1] 蒋延生[1] 汪文秉[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《西安交通大学学报》2007年第10期1179-1183,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(6051004)

摘　　要：从理论上分析了矩形波导中传播模式的瞬变过程,给出了在冲激脉冲、阶跃脉冲和髙斯脉冲波形激励下,波导中电磁波瞬态响应的解析公式,并采用时频分析方法对波导中传播信号、开口腔体的散射信号的瞬态特性进行了分析.分析结果发现,当电磁脉冲信号投射到开口腔体上时,其散射信号中含有与其腔体形状、尺寸特征有关的谐振模式,不同的腔体目标,其散射信号后期信号中的谐振频率不同,通过提取散射信号中的谐振特征,可对带腔体目标进行目标识别.The transient process of propagation pattern in rectangle waveguide is analyzed theoretically and the analytical formulas of electromagnetic wave transient response excited by impulse, step signal and Gaussian pulses wave in the wave-guide are given. The time-frequency analysis method is used to analyze the transient response characteristics of signals propagated along waveguide and open cavities scattering signal. Through analyzing it is found that the scattering signal contains resonance pattern that is related with the size and shape of cavities when an electromagnetic pulse signal is projected on open cavities. With different open cavity target the resonant frequency will be different in scattering ties can be identified by extracting the resonance subsequent signal. The targets with open cavifeature in scattering signal.

关 键 词：波导 开口腔体 瞬态特性 目标识别 时频分析 

分 类 号：TN95[电子电信—信号与信息处理]