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- The effects of radiation and absorption of raindrops on S and X band radar electromagnetic waves are compared and discussed in this paper. 本文讨论雨滴对船用雷达的两个波段,即S波段和X波段雷达电波的辐射和吸收作用,并且对辐射和吸收作用作出比较,对S波段和X波段的作用也作出了比较。 结果表明雨滴对X波段的雷达电波的辐射作用较吸收作用为大,雨滴对X波段的雷达电波的吸收作用较对S波段的雷达电波的吸收作用为大。
- Since the frequency stepped radar is a instantaneous narrow band radar with synthesized wideband, it may resolve the bandwidth problem by changing the phase pulse by pulse. 由于频率步进信号是一种瞬时窄带、合成宽带的雷达信号,可以通过脉间配相的改变解决孔径渡越时间、波束指向变化等问题。
- In modern radar system, wide or ultra wide band radar signal is used more widely. Accordingly, by using digital signal processing, we need high-speed data acquisition system to get information. 在现代雷达系统中,宽带雷达信号应用的越来越广泛,相应地,通过数字信号处理的方法来处理超宽带雷达信号,需要高速的数据采集系统来提取信息。
- A New Design of Wide Band Radar Signal Source Based on DDS 一种基于DDS技术的新型宽带雷达信号源的设计
- Design of Channel Dropping Filter in Ultre-Wide Band Radar 超宽带雷达频带分割滤波器设计
- Wavelets and Its Applications in Ultra-wide Band Radar 小波理论及其在超宽带雷达中的应用研究
- They picked up the yacht on their radar screen. 他们在雷达屏上看到了那艘游艇。
- He left when the band began to beat out pop music. 乐队一奏起流行音乐他就走了。
- The band played a military march. 乐队吹奏军队进行曲。
- The radar scanned the sky for enemy planes. 雷达密切监视天空,搜索敌机。
- A live band is always a good draw at a party. 现场演奏的乐队在聚会上总是很吸引人的。
- He was waylaid by a band of guerrillas. 他遭到游击队的狙击。
- Radio2 can be heard on the long wave band. 第二广播电台可在长波段收听到。
- The watchtower followed the aircraft by radar. 瞭望塔通过雷达追踪这架飞机的行踪。
- Enemy ships were detected on the radar screen. 敌舰的影像已显现在雷达(屏幕)上。
- The brass band is banging away in the park. 铜管乐队在公园里吹吹打打。
- The signal was picked up by a downrange radar station. 该信号被试验飞行方向之内的雷达站收到了。
- A gunboat was detected by the radar. 雷达探测出一炮艇。
- He has formed a new band with his brother on bass. 他组织了一个新乐队,由他弟弟弹低音吉他。
- Enemy aircraft were detected by our radar. 敌机被我方雷达发现。