实现宽带信号实时测频的声光频谱分析仪  

Acousto-optics frequency spectrum analyzer achieving real-time frequency detection of the wide-band signal

作　　者：吴冉[1] 朱吉[1] 刘彪[1] 谢强[1] 王晓新[1] 

机构地区：[1]四川压电与声光技术研究所,重庆400060

出　　处：《红外与激光工程》2006年第z4期371-376,共6页Infrared and Laser Engineering

摘　　要：针对日益复杂的电磁波环境,为突破工程可实用化的关键技术,对声光频谱分析仪进行高灵敏度、大带宽、实时响应等多方位技术攻关.阐述了高灵敏度、宽带、实时声光频谱分析仪的主要工作原理及设计方法.研制出瞬时带宽200 MHz,灵敏度优于-80 dBm,测频分辨率达1 MHz 的声光频谱分析仪样机.若采用5通道同时工作,便可将带宽拓展到1 GHz,这将在电子战中具有很高的应用价值。其中,详细介绍了采用超声跟踪方式拓展声光偏转器布喇格带宽的设计以及在视频信号处理电路中首次采用的频点跟随读数方式。此种数据采集方式避免了传统设计中靠微机对信号进行处理、检出等繁琐环节所造成的时间拖延,真正做到信号的实时响应输出。In regart to the complex increasingly electromagnetic conditions and in order to achieve the key practical technics for engineering,the technics of acousto-optic are tackled on the fields of high sensitivity, wide-band and real-time response.The sample analyzer with transient bandwidth of 200MHz,sensitivity better than -80dBm and the frequency measuring resolution of 1 MHz has been developed.The principle of Bragg bandwidth is introduced which is expanded using ultrasonic tracing and the designed method of getting result by following real-time frequency site which is first adopted in the video signal processing.The data collection method achieves a real-time output of signal response.

关 键 词：声光调制 频谱分析 宽带检测 实时响应 

分 类 号：O426.3[理学—声学]