摘要
本文研究了一种微波高线性扫频技术的实现方法.这种方法运用锁相环路和延迟线来提高扫频线性度.文中首先建立了锁相扫频环路(PLFSL)的相位模型,并应用FFT和数字滤波器的概念进行了系统分析.其次利用计算机模拟计算了PLFSL的稳态响应.最后对PLFSL的原理框图进行了实验验证.测试结果:中心频率1.5GHz、扫频带宽为500MHz的PLFSL的扫频线性度为0.008%.这一结果说明该方法是先进、可行的.
In this paper, a method of microwave high-linear frequency-sweep technique is studied. PLL and delay line are used to improve frequency-sweep linearity. First, a phase model of phase-locked frequency-sweep loop (PLFSL) is built and the system is analysed by using FFT algorithm and the concept of digital filter. Then the PLFSL steady state response is simulated by the computer. Finally, the experimental analysis is carried out for the block diagram of PLFSL. The results are frequency-sweep linearity of the PLFSL with center frequency 1. 5GHz and bandwidth 500MHz. is 0. 008%. It is shown that this method is advanced and feasible.
出处
《微波学报》
CSCD
北大核心
1996年第4期304-309,共6页
Journal of Microwaves
关键词
微波
线性度
微波高线性扫频
雷达系统
Microwave, Linearity, Frequency-sweep, Phase locked, Delay
