【摘要】：模式匹配法(MMM)是建立在廣義傳輸線理論之上、基于場(chǎng)理論的全波分析方法。目前,模式匹配法已經(jīng)發(fā)展到了嚴(yán)格的場(chǎng)解析階段,具有計(jì)算速度快、求解精度高和消耗計(jì)算機(jī)內(nèi)存小的優(yōu)點(diǎn),成功應(yīng)用于濾波器、耦合器、阻抗轉(zhuǎn)換器、模式轉(zhuǎn)換器、天線、多工器、功率分配器、反饋網(wǎng)絡(luò)、移相器、偏光器、補(bǔ)償彎波導(dǎo)、本征值問(wèn)題以及手征介質(zhì)的特性分析中。微波窗作為輸入輸出系統(tǒng)的重要組成部分,也是高功率微波系統(tǒng)的一個(gè)重要無(wú)源器件,它除了真空密封作用外,還具有饋送能量、透射微波、降低反射等作用,其質(zhì)量好壞直接影響微波器件的電參數(shù)及其壽命。本文對(duì)模式匹配法及其在微波窗的應(yīng)用進(jìn)行了深入研究。對(duì)模式匹配法進(jìn)行了詳細(xì)的理論分析和解析推導(dǎo),重點(diǎn)對(duì)S參數(shù)計(jì)算、相對(duì)收斂性、復(fù)功率守恒與電磁場(chǎng)匹配進(jìn)行了理論分析與數(shù)值驗(yàn)證。應(yīng)用模式匹配法對(duì)微波管中常見(jiàn)的四類窗結(jié)構(gòu)(膜片加載矩形波導(dǎo)窗、多層介質(zhì)圓波導(dǎo)窗、同軸窗和高功率盒型窗)進(jìn)行了仿真設(shè)計(jì),在高精度的前提下大大縮短了窗的設(shè)計(jì)周期。本論文的主要工作內(nèi)容和創(chuàng)新點(diǎn)如下:1、系統(tǒng)深入地研究了模式匹配法,利用電磁場(chǎng)邊界條件,建立了5種突變結(jié)(矩形-矩形、圓-圓、同軸-同軸、大矩-小圓、大圓-小矩)的廣義散射矩陣。利用格林公式、離散傅里葉變換、坐標(biāo)系轉(zhuǎn)換以及歸一化正交性等原理,推導(dǎo)出了這5類突變結(jié)上的模式之間的耦合矩陣解析解。2、利用矩陣級(jí)聯(lián)理論以及傳輸線理論,推導(dǎo)出規(guī)則無(wú)源器件模型的廣義散射矩陣的解析計(jì)算公式�；贛ATLAB語(yǔ)言編寫了模式匹配法程序包MMMS,并對(duì)模式匹配法的相對(duì)收斂性進(jìn)行了研究。3、在模式匹配法的框架下,推導(dǎo)了各個(gè)模式在無(wú)源器件內(nèi)傳輸?shù)墓β史认禂?shù),得到了無(wú)源器件在頻帶內(nèi)任意截面的復(fù)功率,以及整個(gè)三維空間任意頻點(diǎn)的電磁場(chǎng)分布。驗(yàn)證了電磁波傳播過(guò)程中的復(fù)功率守恒與電磁場(chǎng)匹配。4、應(yīng)用模式匹配法對(duì)4類常見(jiàn)微波窗進(jìn)行了仿真設(shè)計(jì),計(jì)算結(jié)果與三維電磁場(chǎng)數(shù)值模擬軟件HFSS、CST、MTSS得到的模擬結(jié)果非常吻合,驗(yàn)證了模式匹配法相關(guān)理論推導(dǎo)與程序代碼的正確性與可靠性。
[Abstract]:Mode matching method (MMM) is a full wave analysis method based on field theory and based on generalized transmission line theory. At present, the mode matching method has been developed to a strict field analysis stage, with the advantages of fast calculation speed, high accuracy and low memory consumption. It has been successfully applied to filters, couplers, impedance converters, mode converters, antennas, etc. In the analysis of multiplexer, power divider, feedback network, phase shifter, polarizer, compensated curved waveguide, eigenvalue problem and chiral medium. As an important part of input and output system, microwave window is also an important passive device in high power microwave system. In addition to vacuum sealing, microwave window also has the functions of feeding energy, transmitting microwave, reducing reflection and so on. Its quality directly affects the electrical parameters and lifetime of microwave devices. In this paper, the pattern matching method and its application in microwave window are studied. The theoretical analysis and analytical derivation of the pattern matching method are carried out in detail, and the theoretical analysis and numerical verification of S parameter calculation, relative convergence, complex power conservation and electromagnetic field matching are carried out. Four kinds of window structures (diaphragm loaded rectangular waveguide window, multilayer dielectric circular waveguide window, coaxial window and high power box window) are simulated and designed by mode matching method. On the premise of high precision, the design cycle of window is shortened greatly. The main contents and innovations of this thesis are as follows: 1. The pattern matching method is studied systematically and five abrupt junctions (rectangular rectangle, circular circle, coaxial, large moment and small circle) are established by using the boundary condition of electromagnetic field. The generalized scattering matrix of large circle and small moment. Based on Green's formula, discrete Fourier transform, coordinate system transformation and normalized orthogonality, the analytical solution of coupling matrix between the modes on these five kinds of abrupt junctions is derived, and the matrix cascade theory and transmission line theory are used. An analytical formula for the generalized scattering matrix of a regular passive device model is derived. Based on MATLAB language, the program package of pattern matching method (MMMS,) is written and the relative convergence of pattern matching method is studied. In the framework of pattern matching method, the power amplitude coefficients of each mode in passive devices are deduced. The complex power of passive devices with arbitrary cross section in the frequency band and the electromagnetic field distribution at any frequency point in the whole three-dimensional space are obtained. It is verified that the conservation of complex power and the matching of electromagnetic field during electromagnetic wave propagation. The simulation design of four kinds of common microwave windows is carried out by using the mode matching method. The calculated results are in good agreement with the simulation results obtained by the three-dimensional electromagnetic field numerical simulation software HFSS,CST,MTSS. The correctness and reliability of the related theoretical derivation and program code of the pattern matching method are verified.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN103

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 何晟;鄧艷波;李儒禮;;高斯模式輸出窗的熱分析[J];真空電子技術(shù);2015年03期

2 陳輝;王麗;羅勇;唐勇;;Q波段回旋行波管新型盒型輸出窗的設(shè)計(jì)[J];強(qiáng)激光與粒子束;2015年01期

3 張茜;董桂霞;李媛媛;劉秋香;董麗;;高功率微波窗口材料的研究進(jìn)展[J];中國(guó)陶瓷工業(yè);2014年05期

4 姜利輝;李浩;吳澤威;;94GHz的TE_(11)-HE_(11)模式變換器設(shè)計(jì)[J];強(qiáng)激光與粒子束;2014年06期

5 徐勇;羅勇;李宏福;王建勛;鄢然;王麗;蒲友雷;熊彩東;;W波段高功率回旋行波管寬帶輸入窗設(shè)計(jì)[J];真空科學(xué)與技術(shù)學(xué)報(bào);2013年11期

6 閻磊;胡林林;徐翱;雷文強(qiáng);陳洪斌;;0.22THz折疊波導(dǎo)行波管盒型窗設(shè)計(jì)及實(shí)驗(yàn)[J];太赫茲科學(xué)與電子信息學(xué)報(bào);2013年05期

7 賴穎昕;楊雷;張世昌;;矩形槽同軸布拉格結(jié)構(gòu)的模式匹配分析方法及實(shí)驗(yàn)驗(yàn)證[J];物理學(xué)報(bào);2013年20期

8 王亞軍;陳樟;劉俊;;0.14THz折疊波導(dǎo)行波管盒型窗設(shè)計(jì)與制作[J];太赫茲科學(xué)與電子信息學(xué)報(bào);2013年02期

9 秋實(shí);張冠軍;王香麗;呂香慧;張治強(qiáng);;加工工藝對(duì)微波窗材料介電性能的影響[J];強(qiáng)激光與粒子束;2013年04期

10 武華鋒;荀民;劉俊;;模式匹配法在波導(dǎo)無(wú)源器件設(shè)計(jì)中的應(yīng)用與研究[J];火控雷達(dá)技術(shù);2013年01期

相關(guān)博士學(xué)位論文 前2條

1 劉迎輝;回旋速調(diào)放大器理論與模擬研究[D];電子科技大學(xué);2008年

2 張本全;微波無(wú)源器件設(shè)計(jì)中的模式匹配法研究[D];電子科技大學(xué);2004年

相關(guān)碩士學(xué)位論文 前2條

1 李虎雄;寬帶大功率微波輸出窗及過(guò)渡段研究[D];電子科技大學(xué);2011年

2 高留安;螺旋線行波管及耦合腔行波管輸入輸出結(jié)構(gòu)設(shè)計(jì)與優(yōu)化[D];電子科技大學(xué);2011年

，

本文編號(hào)：2240049