UWB系统中天线性能对脉冲波形的影响  

Consideration for Antenna Characteristics Effect on Pulse Shape in UWB Radio Systems

作　　者：刘蕾蕾[1,2] 洪伟[1] 

机构地区：[1]南京邮电大学电子科学与工程学院,南京210003 [2]东南大学毫米波国家重点实验室,南京210096

出　　处：《现代雷达》2011年第12期58-61,共4页Modern Radar

基　　金：江苏省高校自然科学基金(10KJB510019);南京邮电大学引进人才基金(NY209010);国家863重大专项(2010ZX03007-002-01);毫米波国家重点实验室开放课题(K20092)

摘　　要：分析了超宽带无线系统中,天线在发射和接收过程中对基带脉冲信号波形的失真影响。采用了天线系统传递函数描述天线的辐射和接收特性,在暗室中对典型的超宽带印刷天线进行频域特性和时域特性的测量,给出了脉冲信号的辐射和接收过程。研究表明结合天线系统传递函数,可以设计出更符合FCC辐射功率掩蔽的脉冲信号,以及选取出波形保真系数最佳的本地模板信号,从而获得全局性能最优的超宽带系统。The effects of the antenna characteristics on the pulse shape distortions in the uhra-wideband radio systems are presented. The transmitting and receiving characteristics are described by the antenna system transfer functions. Frequency domain measurements and time domain measurements on typical planar UWB antennas are held in the anechoic chamber. The transmitting and receiving processes of the pulse signal are presented. Combined with the antenna system transfer function, the radiated power den- sity spectrum shaping which complied with FCC＇s emission limit mask can be designed, and the template signal in the receiver with the best fidelity can be obtained. Then, the optimal performance of overall systems is obtained.

关 键 词：超宽带天线 波形失真 传递函数 

分 类 号：TN925[电子电信—通信与信息系统]