【摘要】：本論文從理論到實(shí)際操作詳細(xì)分析了Vlasov準(zhǔn)光模式變換器的整個(gè)系統(tǒng)設(shè)計(jì)及數(shù)值計(jì)算,并對(duì)Denisov輻射器進(jìn)行了簡(jiǎn)單的說(shuō)明。文章先從總體上介紹了準(zhǔn)光模式變換器國(guó)內(nèi)外的發(fā)展?fàn)顩r,然后從理論出發(fā),介紹各個(gè)準(zhǔn)光模式變換器的設(shè)計(jì)機(jī)理及選擇輻射器的條件及方法,再一步一步說(shuō)明準(zhǔn)光模式變換器中反射鏡面的設(shè)計(jì)原理及其面上場(chǎng)的計(jì)算方法。最后用Matlab編程進(jìn)行數(shù)值模擬。文中主要應(yīng)用幾何光學(xué)和矢量繞射理論及一些數(shù)學(xué)分析的方法對(duì)整個(gè)準(zhǔn)光模式變換器系統(tǒng)進(jìn)行了詳細(xì)的分析研究。先用幾何光學(xué)對(duì)輻射器原理進(jìn)行了分析:不同模式下的饋源波導(dǎo)如何切口、如何計(jì)算切口的長(zhǎng)度、如何選擇輻射器的種類(lèi)等。再用幾何光學(xué)初步設(shè)計(jì)準(zhǔn)光模式變換器的反射鏡面的方程、幾何參數(shù)及分析了其局部坐標(biāo)與全局坐標(biāo)的關(guān)系。然后再利用矢量繞射倫理進(jìn)行輻射場(chǎng)計(jì)算,反復(fù)優(yōu)化參數(shù)。并且文中推導(dǎo)了矢量繞射理論,說(shuō)明了其物理意義,還通過(guò)數(shù)學(xué)分析將矢量繞射理論的矢量方程標(biāo)量化。最后,通過(guò)理論的分析,本文設(shè)計(jì)了一個(gè)工作頻率為94GHZ,饋源波導(dǎo)半徑為9mm,模式為T(mén)E01的Vlasov準(zhǔn)光模式變換器。此準(zhǔn)光模式變換器選擇了梯形切口,長(zhǎng)度為82mm;兩級(jí)拋物柱面反射鏡面。通過(guò)編程計(jì)算優(yōu)化,最后在輸出窗口得到很好的高斯束(TEM00模),且轉(zhuǎn)換效率為76.42%。并且在設(shè)計(jì)中詳細(xì)說(shuō)明了切口面、反射鏡面等各個(gè)面的等效流源的算法。在計(jì)算方法和編程上的特色:相對(duì)于傳統(tǒng)的口徑面積分法,我們采用等效流源的方法把輻射器分為兩個(gè)面(輻射器的切口面和波導(dǎo)饋源口面),并且計(jì)算這兩個(gè)面上的等效流源,這種方法使計(jì)算更精確。
[Abstract]:In this paper, the whole system design and numerical calculation of Vlasov quasi-optical mode converter are analyzed in detail from theory to practice, and the Denisov radiator is simply explained. This paper first introduces the development of quasi-optical mode converters at home and abroad, and then introduces the design mechanism of each quasi-optical mode converter and the conditions and methods of selecting radiators from the theory. The design principle of reflection mirror in quasi-optical mode converter and the calculation method of its surface are further explained. Finally, the numerical simulation is carried out with Matlab programming. In this paper, geometric optics, vector diffraction theory and some mathematical analysis methods are used to analyze the whole quasi-optical mode converter system in detail. Firstly, the principle of the radiator is analyzed by geometrical optics: how to cut the feed waveguide in different modes, how to calculate the length of the notch, how to choose the type of radiator, etc. Then the equation of reflection mirror, geometric parameters and the relationship between local coordinate and global coordinate of quasi-optical mode converter are preliminarily designed by geometric optics. Then the radiation field is calculated by vector diffraction ethics, and the parameters are optimized repeatedly. The vector diffraction theory is deduced and its physical meaning is explained. The vector equation of vector diffraction theory is quantized by mathematical analysis. Finally, through theoretical analysis, a Vlasov quasi-optical mode converter with operating frequency of 94 GHz, feed waveguide radius of 9 mm and mode of TE01 is designed. The quasi-optical mode converter has a trapezoidal notch with a length of 82 mm and a two stage parabolic cylindrical reflection mirror. Finally, the Gao Si beam (TEM00 mode) is obtained in the output window, and the conversion efficiency is 76.42. In the design, the algorithm of the equivalent flow source of each plane, such as notch surface and reflective mirror surface, is described in detail. The characteristics of calculation and programming are as follows: compared with the traditional method of aperture area division, we use the method of equivalent current source to divide the radiator into two faces (the notch surface of the radiator and the feed surface of the waveguide). And the equivalent flow source on these two planes is calculated, which makes the calculation more accurate.
【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】：2014
【分類(lèi)號(hào)】：TM46

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相關(guān)期刊論文 前1條

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本文編號(hào)：2322678