一种K波段超宽带雷达频率综合器的研制  

Development of K-Band UWB Radar Frequency Synthesizer

作　　者：王玉江 赵达军 陈福林 张博 刘刚 WANG Yujiang;ZHAO Dajun;CHEN Fulin;ZHANG Bo;LIU Gang(Sichuan Institute of Aerospace Electronic,Chengdu 610100)

机构地区：[1]四川航天电子设备研究所,成都610100

出　　处：《火控雷达技术》2022年第4期66-71,77,共7页Fire Control Radar Technology

摘　　要：随着弹载武器逐渐向着速度更快、频带更宽、抗干扰能力更强等方向发展,主动雷达导引头作为弹载武器进行精确识别打击目标的核心系统,易受敌方雷达干扰机的干扰,故对其抗干扰能力提出了更高的要求。雷达频率综合器作为主动雷达导引头系统的核心部件,其产生的超宽带跳频信号对雷达系统的抗干扰能力具有决定性影响。本文运用环外插入混频器的DDS+PLL频率合成技术和信号串扰隔离屏蔽技术,使用ADIsimPLL仿真方法,采用乒乓式锁相环设计方案,设计了一种超宽带、快速跳频的高性能雷达频率综合器,有效提高了雷达导引头的抗干扰能力及目标探测能力。通过实验测试,该雷达频率综合器输出的K波段跳频信号带宽可达2GHz,相位噪声优于-80dBc/Hz@1kHz,发射上行信号带宽可达2GHz,捷变带宽可达300MHz,杂散可达-60dBc,完全满足设计指标要求。With the gradual development of missile-borne weapons towards higher velocity,wider frequency bands and stronger anti-jamming capabilities,the active radar seeker,acting as the core system for target accurate identification and attacking by missile-borne weapons,was relatively vulnerable to the interference from enemies'radar jamming devices;hence,higher requirements were put forward for its anti-jamming capability.As the core component of the active radar seeker system,the radar frequency synthesizer generates ultra-wideband frequency hopping signal that had a decisive impact on the anti-jamming ability of the radar system.This paper used the DDS+PLL frequency synthesis technology that inserted into the mixer outside the ring and signal crosstalk isolation shielding technology,adopting the ADIsimPLL simulation method and the ping-pong phase-locked loop design scheme to formulate an ultra-wideband,fast frequency hopping high-performance radar frequency synthesizer,which effectively improved the anti-jamming ability and target detection ability of the radar seeker.Through experimental tests,the K-band frequency hopping signal bandwidth reached 2GHz,the phase noise was better than-80dBc/Hz@1kHz,the transmit upstream signal bandwidth reached 2GHz,the agile bandwidth reached 300MHz,and the spurious reached-60dBc,which fully met the designing index requirements.

关 键 词：DDS+PLL频率合成技术 乒乓式锁相环 ADISimPLL 电磁兼容性 

分 类 号：TN95[电子电信—信号与信息处理] TN74[电子电信—信息与通信工程]