工程设计学报2017，Vol.24Issue(4)：365-372,8.DOI:10.3785/j.issn.1006-754X.2017.04.001
随机振动对波导缝隙阵天线增益影响的等效算法研究
Research on the equivalent calculation method for the effect of random vibration on the gain of slotted waveguide array antenna
摘要
Abstract
Slotted waveguide array antenna has the advantages of compact structure ,light weight , good performance and so on ,and it is often used in airborne radar or missile borne radar .The ran-dom vibration is the main load form of radar and causes the antenna distorted ,which affects the radiation gain .At present ,the traditional process for calculating the effect of random vibration on the antenna gain is very complicated and consumes more computation time and memory .An e-quivalent method for calculating the effect of random vibration on the antenna gain was proposed by using the root mean square values of the distorted displacement response .It was assumed that the random vibration load was a stationary process of a normal distribution ,and the average value of the load was zero .Multiple samples were generated based on the complete correlation between each node .Firstly ,the root mean square values of the gains were obtained by the traditional method and the equivalent method .Then ,the applicable condition of the equivalent method was deduced by Taylor expansion .Lastly ,taking the broad-wall longitudinal slotted arrays in rectan-gular waveguides as an example ,the validation of the presented approach was confirmed by using simulation and experiment ,and the maximal calculation error was less than 0 .1 dB .The study showed that the effect of random vibration on the gain of the antenna could be calculated quickly under certain conditions .This equivalent method greatly improves the computational efficiency and saves computation time .The result has great significance of engineering ,and provides a ref-erence to antenna designers .关键词
随机振动/波导缝隙阵天线/增益/位移响应均方根Key words
random vibration/slotted waveguide array antenna/gain/root mean square of dis-placement response分类
信息技术与安全科学引用本文复制引用
王丹丹,王勇,郑雪晓,杜平安..随机振动对波导缝隙阵天线增益影响的等效算法研究[J].工程设计学报,2017,24(4):365-372,8.基金项目
国防科工局预研项目(0D2014061300014) （0D2014061300014）
