摘要
体系化作战中,不同波段雷达距离较近时,常出现谐波干扰,雷达天线需要进行谐波抑制设计提高电磁兼容性(EMC)。文中以某相控阵雷达天线样机为例,首先建立了发射链路模型,并据此分析了谐波来源及传播路径;然后,从屏蔽隔离和传输链路两条路径进行谐波抑制设计。一方面,通过功率器件的封装、T/R组件的壳体以及密闭的高频舱实现三级屏蔽隔离设计;另一方面,给链路中的环形器、滤波器、天线以及阵列合成等环节分配了谐波抑制指标,并分别介绍了实现方法。最后介绍了该样机的发射谐波测试结果,其谐波抑制能力达到了-130 dBc以上。
In systematic operations,radars of different bands are often deployed in near area.In this case,the harmonic radiation of the low-band radar may interfere with other high-band radars.Therefore,it is necessary to consider the harmonic suppression ability of antenna when designing a radar,so as to improve the electromagnetic compatibility(EMC)of the whole combat system.In this paper,firstly,the transmitting link model of typical phased array antenna is established,and the source and propagation path of harmonics are analyzed.Then,the harmonic suppression is carried out from two paths:shielding isolation and link suppression.On the one hand,the three-stage shielding isolation is carried out through the packaging of power amplifier module,the shell of T/R module and the all-metal closed high-frequency cabin.On the other hand,harmonic suppression targets are assigned to circulator,filter,radiating element antenna and array synthesis in the transmitting link,and the realization methods of harmonic suppression of each part are introduced respectively.Finally,the measured results of emission harmonics are introduced,and the harmonic suppression ability above-130 dBc is achieved.
作者
王高飞
李晨枫
于大群
杨磊
张鹏
WANG Gao-fei;LI Chen-feng;YU Da-qun;YANG Lei;ZHANG Peng(The First Military Representative Office of the Air Force Equipment Department in Nanjing Area,Nanjing 210039,China;The 14th Research Institute of CETC,Nanjing 210039,China)
出处
《微波学报》
CSCD
北大核心
2022年第4期37-40,53,共5页
Journal of Microwaves
关键词
有源相控阵天线
谐波抑制
屏蔽隔离
发射链路
active phased array antenna
harmonic suppression
shielding and isolation
transmitting link