单干扰旁瓣对消器的方向性性能仿真分析  

Simulation of directivity performance of a single jammer sidelobe canceller

作　　者：李丹[1] 张瓅玶[1] 冯正和[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2007年第7期1147-1150,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：为了研究干扰对消对阵列方向性的影响,引入了主阵列方向图的峰瓣比、对消单元峰扰比和峰信比3个参数。通过对这几个参数的仿真可看出:阵元数的变化不影响方向性随峰瓣比变化的曲线形状;峰扰比大于峰瓣比或者峰瓣比小于10 dB时的旁瓣对消会导致方向性的严重恶化。表明方向性的起伏与阵列增益没有必然的联系,而峰瓣比和峰扰比的大小关系以及峰瓣比的绝对值起着决定性的作用。对一个弧形阵列旁瓣对消器的改进设计验证了该结论可以从线阵推广到任意阵列。The sidelobe cancellation effect on array directivity is quantified based on the main beam pattern＇s peak sidelobe ratio （PSR）, the canceling element＇s peak interference direction ratio （EPIR） and the element＇s peak signal direction ratio （EPSR）. Simulations show that the curves of directivity versus PSR are similar for various numbers of array elements. When the EPIR is greater than the PSR or the PSR is less than 10 dB, sidelobe cancellation will greatly deteriorate the directivity. The results show that the directivity fluctuations are not related with the array gain, while strongly related with the relationship between PSR and EPIR and the absolute value of PSR. A modified arc array sidelobe canceller design verified that these conclusions are applicable to not only linear arrays but also arbitrary arrays.

关 键 词：天线阵 旁瓣对消器 主波束方向图 峰瓣比 单元峰扰比 单元峰信比 

分 类 号：TN820.15[电子电信—信息与通信工程]