本文選題：高階矩量法 + 多層快速多極子方法　； 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：電大尺寸平臺(tái)中的天線性能分析一直是電磁工程領(lǐng)域的重要課題之一。在眾多電磁計(jì)算方法中,矩量法(MoM)與物理光學(xué)法(PO)形成的混合方法(MoM-PO)經(jīng)常被用來(lái)仿真此類(lèi)問(wèn)題。然而,對(duì)于低副瓣天線等實(shí)際應(yīng)用,PO的計(jì)算精度往往難以滿足工程需求。為了獲得高精度仿真結(jié)果,一種理想的方法是利用MoM一體化仿真天線陣列與平臺(tái)。雖然高階基函數(shù)、核外技術(shù)、并行計(jì)算技術(shù)等先進(jìn)技術(shù)的發(fā)展極大地?cái)U(kuò)展了MoM的仿真能力,但是對(duì)于數(shù)百波長(zhǎng)的電大平臺(tái),由于計(jì)算資源限制,利用MoM進(jìn)行精確仿真仍然比較困難。針對(duì)電大尺寸平臺(tái)中天線性能分析,本文研究了低副瓣天線陣列的泰勒綜合,并設(shè)計(jì)了一種有效的計(jì)算方法——高階矩量法與多層快速多極子的混合方法(HoMoM-MLFMA)。天線陣列通常包含大量細(xì)小結(jié)構(gòu)以及金屬、介質(zhì)材料,本文采用HoMoM進(jìn)行仿真。與傳統(tǒng)基函數(shù)(如RWG基函數(shù))相比,高階基函數(shù)顯著降低了未知量,進(jìn)而降低了計(jì)算量與存儲(chǔ)量。為了避免矩陣方程迭代求解收斂慢的問(wèn)題,HoMoM采用LU分解求解矩陣方程。對(duì)于電大尺寸平臺(tái),采用MLFMA進(jìn)行仿真。然后通過(guò)近場(chǎng)考慮天線與平臺(tái)之間的耦合。數(shù)值結(jié)果表明,HoMoM-MLFMA的計(jì)算精度明顯優(yōu)于MoM-PO。為了進(jìn)一步提高HoMoM-MLFMA的計(jì)算能力,本文在串行算法基礎(chǔ)上研究了HoMoM的矩陣分塊并行策略及MLFMA的自適應(yīng)平面波劃分并行策略,并利用并行算法仿真了2132單元的微帶天線陣列安裝于400波長(zhǎng)飛機(jī)平臺(tái)后的受擾輻射特性。
[Abstract]:Antenna performance analysis in electrically large scale platform has been one of the most important topics in electromagnetic engineering field. Among the many electromagnetic calculation methods, the hybrid method of the method of moment (mom) and the physical optics method (POO) is often used to simulate this kind of problems. However, it is difficult to meet the engineering requirements for the practical applications such as low sidelobe antennas. In order to obtain high precision simulation results, an ideal method is to use MoM to simulate antenna array and platform. Although the development of advanced technologies such as high-order basis function, off-core technology, parallel computing technology has greatly expanded the simulation ability of MoM, but for the TV platform with hundreds of wavelengths, due to the limitation of computing resources, Accurate simulation using MoM is still difficult. Based on the analysis of antenna performance in electrically large scale platform, Taylor synthesis of low sidelobe antenna array is studied in this paper, and an effective calculation method, the hybrid method of high order moment method and multilayer fast multipole method, is designed. The antenna array usually contains a large number of small structures and metal and dielectric materials. In this paper, HoMoM is used to simulate the antenna array. Compared with the traditional basis function (such as RWG basis function), the higher order basis function reduces the unknowns significantly, and then reduces the computation and storage capacity. In order to avoid the problem of slow convergence of iterative solution of matrix equation, HoMoM uses LU factorization to solve matrix equation. For the electrically large scale platform, MLFMA is used to simulate. Then the coupling between the antenna and the platform is considered through the near field. The numerical results show that the calculation accuracy of HoMoM-MLFMA is obviously better than that of MoM-PO. In order to further improve the computing power of HoMoM-MLFMA, this paper studies the matrix partitioning parallel strategy of HoMoM and the adaptive plane-wave partitioning parallel strategy of MLFMA based on serial algorithm. The interference radiation characteristics of a 2132 cell microstrip antenna array installed on a 400-wavelength aircraft platform are simulated by using a parallel algorithm.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN820

【參考文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 趙勛旺;復(fù)雜電磁環(huán)境中快速多極子方法的研究與應(yīng)用[D];西安電子科技大學(xué);2008年

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本文編號(hào)：1973734