基于修正差分进化算法确定周期内多载波微放电等效功率  

Equivalent power determination for single-event multicarrier multipactor based on a modified differential evolution algorithm

作　　者：王新波[1,2] 张小宁[1] 李永东[1] 刘纯亮[1] 王瑞[1,2] 魏焕[2] 冉立新[3] WANG Xinbo ZHANG Xiaoning LI Yongdong LIU Chunliang WANG Rui WEI Huan RAN Lixin(Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi＇an Jiaotong University, Xi＇an 710049, China National Key Laboratory of Science and Technology on Space Microwave, China Academy of Space Technology （Xi＇an）, Xi＇an 710100, China Laboratory of Applied Research on Electromagnetics （ARE）, Zhejiang University, Hangzhou 310027, China)

机构地区：[1]西安交通大学电子物理与器件教育部重点实验室,西安710049 [2]中国空间技术研究院西安分院空间微波技术重点实验室,西安710100 [3]浙江大学应用电磁波研究实验室,杭州310027

出　　处：《中国空间科学技术》2017年第2期66-72,共7页Chinese Space Science and Technology

基　　金：国家自然科学基金(U1537211;11675278;51675421);空间微波技术重点实验室基金重点项目(9140C530101150C53011)

摘　　要：微放电是空间微波部件设计所必须考虑的失效效应之一,随着空间宽带多载波模式的广泛采用,多载波条件下微波部件微放电问题引起广泛关注。针对周期内多载波微放电等效功率计算所采用传统经验公式的不足,提出了一种基于修正差分进化算法的确定周期内多载波微放电等效功率的全局优化方法。该方法通过对多载波合成信号功率特性进行分析,推导获得了20个电子渡越时间内信号能量的表达式,采用二次插值法进行局部搜索,采用修正差分进化算法进行全局优化,从而高效、准确获得全局最优解。以幅度相等、频率间隔相等的多载波信号为例,进行了等效功率的确定,与经验公式的预测结果相当,验证了所提出方法的有效性;同时,对幅度不同、频率间隔不等的多载波信号进行了处理,获得了能够指导微波部件微放电设计的最坏状态及其等效功率。所提出方法不仅适用于幅度不同、频率间隔不等的多载波信号情况,并且能够提供微放电最坏状态时的相位分布,为多载波微放电实验验证提供相位输入。所提出方法相比传统的基于经验公式的方法具有明显优势,为空间宽带多载波工作微波部件微放电设计提供有效依据,在卫星转发器多载波微放电分析及设计中具有价值。Multipactor is one of the most important failure effects for the spaceborne microwave components. With the rapid development of wideband communication satellite systems,the multicarrier multipactor （MM） is paid more and more attentions. While the design criterion with microwave components for single carrier RF signal is explicit, it is controversial for multicarrier multipactor.A method to determine equivalent power for the single-event multicarrier multipactor using the modified differential evolution algorithm was presented to overcome the disadvantages of the conventional empirical formula.The power properties for the multicarrier synthesis signals were analyzed,and the energy in 20 electron transit time was globally optimized.In each optimization,quadratic interpolation was used to find the local optimum, then the global optimum was obtained by using the modified Differential Evolution algorithm.It is the worst case for all kinds of configurations and the optimal average power can be used for the equivalent power in the wideband-component design.The proposed method is demonstrated with the uniform amplitude and equally spaced frequencies.The proposed approach is also able to provide reasonable equivalent power for multicarrier signals with non-uniform amplitudes or the unequally spaced frequencies.

关 键 词：差分进化算法 周期内多载波微放电 等效功率 微波部件 

分 类 号：TN101[电子电信—物理电子学]