基于AD9914的多参数可控频率源设计  

Design of a Multi-parameter Controllable Frequency Source Based on AD9914

作　　者：曾超林 李希密[1] 尹红波[1] 王洪林[1] ZENG Chao-lin;LI Xi-mi;YIN Hong-bo;WANG Hong-lin(The 723 Institute of CSIC, Yangzhou 225101,China)

机构地区：[1]中国船舶重工集团公司第七二三研究所,江苏扬州225101

出　　处：《舰船电子对抗》2021年第2期115-120,共6页Shipboard Electronic Countermeasure

摘　　要：针对某型号捷变频脉冲雷达设备,设计了一种基于AD9914的多参数可调节频率源。该组件不局限于单一波形,它支持正负线性调频、脉冲调制和相位编码,其中,中心频点、调频带宽、调频时间、重频等参数均可调节。测试结果表明该组件的指标性能优越,频率切换时间低于250 ns,杂散抑制达到75 dBc,1 kHz信号相噪在-120 dBC/Hz,可以满足雷达设备的应用。Aiming at a certain type of frequency agile pulse radar equipment,a multi-parameter adjustable frequency source is designed based on AD9914.The module is not limited to a single waveform,supports positive and negative linear frequency modulation(FM),pulse modulation and phase encoding,in which parameters such as the center frequency point,FM bandwidth,FM time,repetition frequency can be adjusted.Test results show that the module has a excellent performance of index,frequency switchtime is less than 250 ns,spurious suppression reaches 75 dBc and 1 kHz phase noise is-120 dBc/Hz,which can meet the application of the radar equipment.

关 键 词：雷达设备 AD9914 直接数字合成器 

分 类 号：TN74[电子电信—电路与系统]